The 1099-DA $0 Basis Trap: What Crypto Investors and CPAs Need to Know for Tax Year 2025

Service boundary: This guide explains reporting of client-supplied records. Monaco CPA does not monitor portfolios, recommend or execute tax-loss harvesting, select investments, or send reminders.

In This Article

1. Three things to know right now
2. Section 1: Why Tax Year 2025 Is Different
3. Section 2: What Is the $0 Basis Trap on Form 1099-DA and Why Does It Happen?
4. Section 3: Four Checks Before You File
5. Section 4: How Does Form 1099-DA Affect My New Jersey State Tax Return?
6. Section 5: How Does the FASB Fair Value Shift Affect Business Owners on Form 1099-DA?
7. Section 6: CPA Corner
8. What Should I Check Before Filing My Return With a 1099-DA?
9. Quick FAQ
10. Need a CPA to reconcile your 1099-DA?
11. Key Takeaway
12. Frequently Asked Questions
13. Request an Intake Review

This article is for informational purposes only and does not constitute tax advice.

A blank cost-basis box means the broker did not report basis; it does not mean your actual basis was $0. Supply supportable basis on Form 8949 from taxpayer records.

Facts this guide may address: An actual Form 1099-DA or related records for a 2025 centralized-platform disposition; transfers between custodial accounts and self-custody; stablecoin activity; staking, earn, or reward records; and digital assets held by a business entity. Notice 2024-57 excludes specified transaction structures from broker reporting beginning with 2025 transactions and until further guidance; form coverage does not determine substantive receipt, disposition, timing, or character.

Note: For TY2025, Form 1099-DA may reflect reportable broker-effected dispositions handled by custodial platforms, hosted wallet providers, payment processors, or kiosks when the operator is a reporting broker; actual coverage depends on the broker, transaction, exemptions, and reporting method. The DeFi broker reporting rule (T.D. 10021) was repealed by Congress via the Congressional Review Act (H.J.Res.25, signed April 10, 2025) and has no legal force. This repeal relates to the non-custodial DeFi "trading front-end services" rule and does not eliminate 1099-DA reporting by custodial brokers for TY2025. Pure on-chain DeFi activity without a reporting broker intermediary generally will not appear on a 1099-DA.

Three things to know right now

1. Form 1099-DA for TY2025 reports gross proceeds (Box 1f, which reflects gross proceeds reduced by allocable transaction fees, commissions, and other allocable costs per Reg. §1.6045-1, and may also reflect the fair market value of non-cash consideration for crypto-to-crypto swaps) for reportable broker-effected dispositions, subject to exceptions and transition carve-outs in IRS guidance including Notice 2024-57. Basis reporting is entirely voluntary for TY2025. The IRS 1099-DA instructions state explicitly that brokers are not required to report basis information for sales effected in 2025. For sales after 2025, mandatory basis reporting generally applies only to covered digital assets acquired after 2025 through a qualifying acquisition and held in the reporting broker's custody until disposition; basis reporting for noncovered assets remains voluntary. Verify any basis the broker reports before relying on it.
2. A blank basis field and a reported $0 require different review. Reconstruct supported basis from your records when the broker leaves it blank, and verify a reported $0; omitting supported basis can overstate gain.
3. The IRS Form 8949 instructions direct digital-asset sales and exchanges of capital assets to boxes G/H/I and J/K/L, not boxes C or F. The receipt of compensation, mining or staking rewards, or business receipts is reported on the applicable income schedule; a later disposition of a received asset requires a separate gain-or-loss, character, and Form 8949 analysis. If you received a Form 1099-B for a tokenized asset, see the tokenized-asset routing note in Check 1 below; the IRS sources do not settle that case.

A TY2025 Form 1099-DA may be late or corrected. Begin the reconciliation from the taxpayer's records and compare any form actually furnished before filing or amending.

Tax Year 2025 is the first Form 1099-DA reporting year for broker-effected digital-asset sales. Reconcile gross proceeds, basis status, and transaction records against the final form and instructions. The IRS published Fact Sheet FS-2025-06 on September 25, 2025 to help taxpayers prepare for Form 1099-DA.

Section 1: Why Tax Year 2025 Is Different

The Infrastructure Investment and Jobs Act of 2021 expanded the broker-reporting provisions for digital-asset transfers. The final regulations and the person's actual services determine whether that person is a reporting broker for a transaction; an exchange or platform label alone does not. Form 1099-DA implements the applicable reporting beginning with Tax Year 2025.

The covered-status and custody rules matter.

For TY2025, brokers generally report gross proceeds for reportable broker-effected digital-asset sales, subject to transaction-specific exceptions and transition relief; those assets are noncovered because covered status requires acquisition after 2025. Brokers are not required to report basis for 2025 sales, though they may report it voluntarily for noncovered securities. For sales after 2025, mandatory basis reporting applies only to covered digital assets acquired after 2025 through a qualifying acquisition and held in the broker's custody until disposition. Pre-2026 lots, transferred-in lots, and other noncovered securities can continue to show blank basis. Verify the form's covered-status indicator and basis fields against your own records.

Recipient copies of Form 1099-DA were due February 17, 2026, the same furnishing deadline category as Form 1099-B under the IRS general instructions. Notice 2024-56 provides penalty and backup-withholding relief for brokers making good-faith efforts to file and furnish correctly for TY2025. Notice 2025-33 extends specified backup-withholding and penalty relief for 2026 and limited 2027 situations; it does not extend the Form 1099-DA furnishing deadline. Reconcile the taxpayer's records with any original or corrected form actually furnished.

Section 2: What Is the $0 Basis Trap on Form 1099-DA and Why Does It Happen?

A blank Box 1g means the broker did not report basis; reconstruct it from your own records. A reported $0 is different: the 1099-DA instructions direct brokers to enter zero only when adjusted basis is actually zero. If your records support a nonzero adjusted basis, verify the form and report the supported amount.

The "Applicable checkbox on Form 8949" field on your 1099-DA uses one-letter codes to assist with Form 8949 and Schedule D routing; Code Y instead flags an unknown holding period. Here is how to read them for TY2025:

Code Y on the 1099-DA: Per the 1099-DA instructions, Code Y signals that the broker cannot determine whether the recipient should check Box H or Box K because the holding period is unknown. For 2025 sales the instructions go further: a broker that does not report basis is told to use Code Y. Either way, a Code Y transaction is a basis-not-reported transaction, because Box H and Box K are both for transactions whose basis is not reported to the IRS; only the short-term or long-term choice is left to you. You must determine short vs. long-term from your own records and use Box H (short-term) or Box K (long-term) on Form 8949. If you genuinely cannot establish the acquisition date, you cannot support long-term treatment, so reporting the position as short-term in Box H is the cautious choice for a gain, though the IRS sources reviewed here do not state an explicit default rule on this point.

Note: Both the 2025 Form 8949 instructions (Code X) and the 1099-DA instructions (Code Y) use a code for an unknown or undetermined holding period; the cross-reference is a drafting inconsistency. Follow the code printed on your actual 1099-DA.

Code H or K on the 1099-DA: The broker has indicated your holding period on the form but did not report basis. This may appear if a broker voluntarily reported holding period information and determined it for on-platform transactions. Use the corresponding Form 8949 box and supply your own basis in Column (e).

Code G or J on the 1099-DA: Basis was reported to the IRS. Use the corresponding Form 8949 box and still verify accuracy before filing.

CPA note on Adjustment Code B, Code E, and Box 1f fees

Three points require separate handling.

On Code B: Use it in Form 8949 Column (f) only when a specific basis figure was shown on the 1099-DA but is incorrect - and the entry differs by box. Basis reported to the IRS (Box G/J): keep the reported basis in Column (e) and put the correction in Column (g). Basis shown but not reported to the IRS (Box H/K): enter the correct basis in Column (e) and -0- in Column (g). When basis is blank, enter your reconstructed cost in Column (e) and leave Column (f) blank. No adjustment code is needed because you are providing an original figure, not correcting a reported one. Check any adjustment code your software generates against the IRS Form 8949 instructions for your specific box; supplying a missing basis is not a correction of a reported one, so it does not call for Code B.

If the basis was reported to the IRS (Box G or J): keep the basis as the broker reported it in Column (e), enter Code B in Column (f), and put the correction in Column (g): the amount that makes Column (h) show your correct gain or loss (negative when the broker under-reported your basis, positive when it over-reported; the Basis Adjustment Worksheet in the Form 8949 instructions walks through the sign).

On Code E: Form 8949 requires an applicable code in Column (f) for an adjustment entered in Column (g). For digital-asset transaction costs allocable to a disposition and not already reflected on the form through an adjustment to proceeds or basis, use Code E and enter the cost as a negative number in parentheses in Column (g), based on the actual form and transaction facts. A positive amount would increase rather than reduce gain.

On Box 1f fees: Brokers are required under Reg. §1.6045-1 to reduce gross proceeds by allocable transaction costs before reporting in Box 1f. Start with Box 1f as your proceeds figure, except for NFT creators and minters where the broker used optional aggregate reporting, in which case proceeds appear in Box 11c and Box 1f is left blank per the 1099-DA instructions. Only make a further Code E adjustment for qualifying disposition costs not already reflected in either the form proceeds or basis. Enter the adjustment as a negative amount in Column (g) and do not deduct a cost twice. Adding fees on top of an already-reduced Box 1f number double counts them.

What the trap looks like in real numbers

You sold BTC for $12,000. Your 1099-DA shows $12,000 in proceeds and a blank basis. Under the stated assumption that supported adjusted basis is $9,000, gain is $3,000; omitting that basis would overstate gain by $9,000, not establish a $9,000 tax overpayment. Entering the reconstructed $9,000 basis in Column (e) supplies information the broker did not report. The complete return determines the tax effect, and the supporting basis records should be retained.

Under the additional illustration assumptions that the BTC is a short-term capital asset and the marginal gain is simultaneously subject to 37% federal income tax, 3.8% NIIT and 10.75% NJ tax, the $9,000 omitted basis creates an isolated $4,639.50 arithmetic difference ($9,000 x 51.55%). This assumes no offsetting complete-return items; it is not a predicted tax overpayment.

When supported reconstruction shows a loss rather than the gain implied by a blank-basis form, report the supported proceeds, basis, adjustments, and loss under the applicable Form 8949 instructions. The form alone does not decide the transaction's gain or loss.

Before filing: rebuild supported basis for each disposition with blank basis and verify any reported $0 against your records, including transferred-in assets.

Payment alone does not establish current adjusted basis. Reconcile later adjustments and request a broker correction when appropriate; a reported $0 conflicts with the form instructions only if the supported adjusted basis is nonzero.

Need a CPA to reconcile your 1099-DA against your exchange records before you file? Learn about the 1099-DA Reconciliation Service or use the contact form to request a written scope.

Section 3: Four Checks Before You File

Check 1: Know your Form 8949 box

The IRS Form 8949 instructions are categorical: digital asset sales and exchanges of capital assets do not use Box C or F. Digital asset transactions otherwise reportable on Form 8949 use Box G, H, or I for short-term and Box J, K, or L for long-term (for a tokenized asset reported on Form 1099-B, see the note below). (Digital asset income that is not a capital-asset disposition - compensation, mining or staking income, business receipts - is reported on the appropriate schedule, not on Form 8949.) Route each transaction from its form, basis-reporting, and holding-period facts:

• Box G / Short-term: 1099-DA received, basis WAS reported
• Box H / Short-term: 1099-DA received, basis NOT reported
• Box I / Short-term: Digital asset transaction not reported on Form 1099-DA or Form 1099-B
• Box J / Long-term: 1099-DA received, basis WAS reported
• Box K / Long-term: 1099-DA received, basis NOT reported
• Box L / Long-term: Digital asset transaction not reported on Form 1099-DA or Form 1099-B

Note for tokenized assets: The 2025 Form 1099-DA instructions allow brokers to report 2025 sales of tokenized assets for cash on either Form 1099-DA or Form 1099-B. The IRS sources do not settle the Form 8949 box for a properly issued Form 1099-B: the Form 8949 instructions' digital-asset paragraph directs digital-asset transactions to boxes G through L, while the printed box labels and the IRS substitute-statement instructions (IRB 2025-30) tie boxes A/B/D/E to Form 1099-B and G/H/J/K to Form 1099-DA. If you receive a Form 1099-B for a tokenized asset, check current IRS guidance and how your software routes it before filing, and keep the form and the basis for the routing choice with your records.

Does Form 1099-DA replace Form 1099-B for crypto?

Form 1099-DA is the designated information return for specified broker-reported digital asset transactions starting with Tax Year 2025. Current coordination rules instead use Form 1099-B for specified Section 1256 contracts, certain dual-classification assets whose sales are cleared or settled on a limited-access regulated network, and specified WHFIT interests. For cash sales of certain tokenized assets effected in 2025, the broker could report the disposition on either Form 1099-DA or Form 1099-B. A taxpayer can therefore receive both forms for different transactions, and each form must be reconciled under its applicable instructions.

Use Box H or Box K when basis was not reported, based on the actual holding period. Do not default reflexively to short-term treatment; determine the holding period from your records, then route to H (short-term) or K (long-term) accordingly.

CPA shortcut for eligible Code G/J transactions: A transaction reported in Box G or J may be aggregated directly on Schedule D line 1a (short-term) or 8a (long-term) without listing it individually on Form 8949 only when it is not a collectible, the form shows that basis was reported to the IRS, Boxes 1h and 1i show no adjustment, the Ordinary box in Box 6 is not checked, and the taxpayer needs no adjustment to basis, gain-or-loss type, or gain or loss. Otherwise, report the transaction through Form 8949.

Check 2: The transfer trap

A transfer-in can create a basis gap. When you move crypto from a cold wallet, hardware device, or another exchange and later sell it on the receiving platform, the receiving broker may lack the original purchase price or purchase date. Transferred-in assets are noncovered and generally are not required to have basis reported, so use your own records.

You bought BTC on Kraken in 2023, transferred it to Coinbase in 2024, and sold it on Coinbase in 2025. Coinbase has your sell data but may have no record of your original purchase price or date. This transfer-in fact pattern requires records-based basis and holding-period verification.

Record reconstruction: Use the originating account, wallet, transfer statement, purchase date, price, lot, and buy-side fee records to support basis. Transferred-in assets can be noncovered, so the receiving broker's form may not contain the originating basis information.

The Date Acquired field on your 1099-DA (Box 1d) may be blank for reasons described in the instructions, including an unknown acquisition date, assets acquired on multiple dates, noncovered status, or an optional method. Boxes 12a and 12b provide transfer-in information, and Box 12b can be blank when assets were transferred in on multiple dates. A blank field does not establish that no transfer occurred. Reconcile each transfer-related line to the actual acquisition, wallet, account, and transfer records.

Box 12a reports the number of units sold that had been transferred into the broker’s custodial account. Box 12b is the transfer-in date, not the original acquisition date; it can be blank for various transfer dates and under optional stablecoin or NFT reporting. Reconcile both with originating acquisition and lot records.

One important rule that changed for 2025: Rev. Proc. 2024-28 provides a safe harbor for allocating unused basis to specific wallets and accounts as of January 1, 2025. Section 3.10 of the Rev. Proc. defines "as of January 1, 2025" as immediately after the close of the taxpayer's day on December 31, 2024. The per-wallet and per-account basis tracking requirement is now in effect. You can no longer aggregate basis across all wallets and exchanges as one pool. If you held BTC on Coinbase and BTC on a Ledger, those are separate basis pools.

Two allocation methods exist under the safe harbor with different documentation requirements. For the Global Allocation method, the methodology must have been documented in books and records before January 1, 2025. The actual mathematical application of that methodology to remaining units must then be completed before the later of the first sale, disposition, or transfer of that asset type on or after January 1, 2025, or the applicable 2025 return deadline in Section 5.02(4)(b), per Section 5.02(5)(b) of the Rev. Proc. If you did not document your methodology before January 1, 2025, you cannot elect Global Allocation retroactively. Until the Global Allocation is completed, Section 5.02(5)(c) permits identification of remaining units sold, disposed of, or transferred only through a standing order or instruction communicated to the broker or recorded in the taxpayer’s books and records; that order must be applied when selecting those units after the allocation is complete.

For the Specific Unit Allocation transition method, Section 5.02(4)(a) of Rev. Proc. 2024-28 requires the allocation documentation before the date and time of the first sale, disposition, or transfer of that asset type on or after January 1, 2025, or by the return due date including extensions, whichever is earlier. Separately, Notice 2025-7 gave eligible taxpayers temporary relief for adequate identification of broker-custodied units disposed of during 2025 by permitting specified book-and-record methods instead of broker communication. Notice 2026-20 extended that separate relief through December 31, 2026. It does not impose or certify a January 1, 2027 broker-system readiness deadline. Unless later guidance extends the relief, the final regulation's broker-communication requirements govern after the relief period.

When no timely adequate identification applies, assign units under the applicable regulatory default-order rule. A generic software preference or later method selection does not replace the disposition-time identification and record requirements.

Check 3: What is and is not on your 1099-DA

Stablecoins: Stablecoin sales and exchanges are dispositions. If the stablecoin was held as a capital asset, the disposition produces capital gain or loss even if the net change is minimal; character can differ when the asset is held as inventory or in another noncapital capacity. Brokers may choose whether to use the optional reporting method for qualifying stablecoins. Under this method, the $10,000 threshold applies specifically to designated stablecoin sales. A designated sale is any sale of a qualifying stablecoin other than an exchange for a non-qualifying digital asset. For a qualifying stablecoin, a sale for fiat or an exchange for another qualifying stablecoin is a designated sale; an exchange for a digital asset that is not a qualifying stablecoin, including a nonqualifying stablecoin, is treated separately. If a broker elects this method and a customer's aggregate gross proceeds from designated stablecoin sales with that broker, after reduction for allocable transaction costs, are at or under $10,000 for the year, those designated stablecoin sales are not required to be reported under the optional method, as clarified in IRS corrections to the 2025 1099-DA instructions. If the aggregate exceeds $10,000, the broker must report those designated sales. The optional method permits aggregate reporting per qualifying stablecoin type on a separate Form 1099-DA for each. Because the threshold is applied per broker, $8,000 of designated sales with Broker A and $8,000 with Broker B are tested separately if each broker elects the optional method. If you receive a stablecoin 1099-DA, check boxes 11a and 11b to see whether that method was used. The return must still account for each taxable disposition under the applicable Form 8949, Schedule D, attached-statement, aggregation, or other reporting rules.

Staking and earn rewards: Notice 2024-57 excludes specified staking-related structures from Form 1099-DA reporting beginning with 2025 transactions and until further guidance, but actual form coverage depends on the broker, transaction, and applicable rule. Rev. Rul. 2023-14 addresses validation rewards within its facts; other earn, lending, referral, and reward arrangements require separate dominion-control, character, and accounting-method analysis. Report amounts to the extent included in gross income under the governing law, whether or not an information return was furnished.

Airdrops, mining, and hard forks. Under Rev. Rul. 2019-24, a hard fork does not create gross income when the taxpayer receives no new units, while an airdrop of new cryptocurrency following a hard fork on the ruling's facts can create income when the taxpayer has dominion and control. Other distributions, mining, and other receipts require their own Section 61, dominion-control, and character analysis, and a later disposition is a separate event. Form 1099-DA coverage depends on the actual broker, transaction, and reporting rules.

Payment processors and de minimis thresholds: For non-stablecoin, non-NFT digital asset transactions through PDAPs, the $600 de minimis threshold is an aggregate annual figure per customer, as clarified in IRS corrections to the 2025 1099-DA instructions. When applying PDAP thresholds, optional method exclusions for stablecoins and specified NFTs are applied first; the remaining non-excluded PDAP sales are then tested against the $600 aggregate threshold. A customer making twenty $50 non-excluded transactions through a PDAP has $1,000 in aggregate sales and all of those transactions become reportable once the threshold is crossed. The de minimis threshold affects only the broker's reporting obligation. Your obligation to report the gain on every taxable disposition, including selling crypto at a kiosk or using crypto to purchase goods or services, remains regardless of whether you receive a form. Note: buying crypto with fiat currency is not a taxable event. It only establishes your cost basis.

Wash-sale reporting note: Standard digital assets generally were treated as property rather than stock or securities for TY2025 Section 1091 analysis. This is reporting education, not a recommendation to sell or repurchase any asset.

A few additional nuances: Form 1099-DA includes Box 1i for wash sale losses disallowed on tokenized securities treated as stock or securities under Section 1091; it is not a general wash-sale box for standard cryptocurrency. Wrapped tokens such as wBTC and liquid staking tokens such as stETH occupy a gray zone where the analysis is fact-specific and unsettled, and the IRS has not issued definitive guidance. For completed transactions involving these assets, retain the transaction records and analyze the specific facts before filing. Additionally, other anti-abuse doctrines including the Economic Substance Doctrine and Step Transaction doctrine can still be applied by the IRS to challenge transactions that lack genuine economic substance beyond tax avoidance.

IRC Section 1091 can disallow a loss on stock or securities when substantially identical stock or securities are acquired, or a contract or option to acquire them is entered into, within 30 days before or after the loss disposition, subject to the statute’s dealer exception; whether it reaches a digital-asset transaction depends on the asset’s legal classification and the completed transaction facts. Standard cryptocurrency generally has been treated as property rather than stock or securities under current IRS guidance, but that does not turn a repurchase into a recommendation or determine economic-substance, related-party, transaction-cost, or other rules.

The Lummis amendment to extend Section 1091 to digital assets was not included in the One Big Beautiful Bill Act signed July 4, 2025. Standalone bill S. 2207 was introduced June 30, 2025 and includes the wash sale extension along with broader crypto tax reforms. On September 16, 2026 the House Ways and Means Committee ordered H.R. 10357 reported; as amended in committee, it would apply Section 1091 to traded digital assets (other than qualified U.S. dollar stablecoins) for dispositions after September 14, 2026. It is not law, and current law still applies. Section 1091 as enacted applies to stock or securities; verify the current status of S. 2207, H.R. 10357, or any successor bill on congress.gov before relying on wash-sale inapplicability for any year. Wrapped tokens and liquid staking tokens occupy a fact-specific gray area. Discuss with your CPA.

Scope reminder: Form 1099-DA covers broker-effected activity by reporting brokers, including applicable custodial platforms and other broker categories such as payment processors and kiosks. Coverage varies by broker and transaction type, including within a custodial platform. The DeFi broker reporting rule was repealed by Congress via the Congressional Review Act (H.J.Res.25, signed April 10, 2025) and has no legal force. This repeal relates to the non-custodial DeFi "trading front-end services" rule and does not eliminate 1099-DA reporting by custodial brokers. Pure on-chain DeFi activity without a reporting broker intermediary generally will not appear on a 1099-DA, though activity routed through a reporting broker intermediary could. Document each difference between the form and the return.

Check 4: Reconcile the Form With Available Broker, Wallet, and Transaction Records

Obtain the available platform transaction histories, CSV or API exports, statements, transfer records, and wallet records. For a capital-asset disposition, start with the proceeds reported in Box 1f, except that proceeds appear in Box 11c when a broker uses the optional aggregate method for specified NFT first sales by a creator or minter. Apply Code E only to otherwise applicable digital-asset transaction costs not already reflected on the form through an adjustment to proceeds or basis, and do not double count a cost already reflected in Box 1f.

For a qualifying cash acquisition, basis generally includes the cash price plus digital-asset transaction costs allocable to the acquired asset under Treas. Reg. §1.1012-1(h). Crypto-for-crypto exchanges and cascading transaction costs follow the regulation's special disposition-side allocation rules, and a separate disposition of a fee token requires its own analysis. An executed price already incorporates its bid-ask spread, so do not add the same embedded spread again.

Direct fiat purchase: If you bought $5,000 of BTC with a $50 trading fee, your basis is $5,050.

Crypto-to-crypto exchange: If materially different ETH and SOL are exchanged in a transaction recognized under Section 1001, determine the amount realized on the ETH and the basis in the acquired SOL from the actual fair market values and the applicable transaction-cost allocation rules. Do not assume the two reported values are identical without reconciling the actual transaction.

Staking rewards, airdrops, and mining income: Basis generally includes receipt-time fair market value only to the extent included in gross income. The amount, timing, and character of any inclusion depend on the actual reward, dominion-and-control, and accounting facts; a token label does not create basis for an amount that was not included in gross income.

One records-based reconciliation framework compares the following sources:

Source 1, Form 1099-DA: The broker's information return for reportable broker-effected sales. Basis may be absent; de minimis, optional-method, and transaction-specific rules apply.

Source 2, Available broker or platform records: A CSV or API export, statement, or other evidence for activity handled by that broker; reconcile it with acquisition, transfer, lot, fee, and other records.

Source 3, On-chain and wallet data: One evidence source for self-custody activity that may not appear on Form 1099-DA; reconcile it with ownership, account, off-chain, and transaction records.

Reconcile the available sources under the governing rules. A return need not match an unsupported form entry, and no single source by itself establishes complete-return treatment.

For a transaction where the taxpayer supplies supported basis that the broker did not report, review the following Form 8949 fields under the current instructions:

Column (a): Description of the asset (e.g., "2.5 BTC")

Column (b): Date acquired. From your records, not the 1099-DA if blank or unreliable

Column (c): Date sold or disposed. Use the supported actual disposition date; reconcile a difference from Form 1099-DA and request a correction when appropriate

Column (d): Proceeds. Use the proceeds reported in Box 1f; Box 11c is used instead only for specified NFT first sales by a creator or minter reported under the optional aggregate method. Analyze whether the actual NFT disposition belongs on Form 8949 or another return schedule before entering it.

Can I use crypto tax software to fix basis errors automatically?

Software can assist with basis reconstruction by importing exchange and wallet history, but its output must be reconciled with actual transaction, transfer, and acquisition records, especially for transferred-in assets.

Section 4: How Does Form 1099-DA Affect My New Jersey State Tax Return?

For NJ crypto investors, basis reporting errors can affect both the federal and state returns.

NJ's graduated rate schedule reaches 10.75% for income over $1 million for both single filers and married filing jointly, per the NJ Division of Taxation published rate schedules for TY2025. A narrow marginal-dollar stack is 51.55% only when that dollar is simultaneously subject to the 37% federal rate, the 3.8% Net Investment Income Tax after its MAGI and other requirements are met, and the 10.75% NJ rate. Tax bases, character, thresholds, deductions, and other complete-return facts can produce a different result; no fixed combined rate follows from omitted basis alone.

In New Jersey, supported gains and losses from digital assets disposed of while held in an investment or capital capacity are included in the "Net gains from disposition of property" category under the current instructions. Digital assets held for sale to customers, used as inventory, received or disposed of in a business, or held under other facts require separate category analysis. You can net gains against losses within the disposition category during the same tax year. However, if the category nets to a loss overall, NJ effectively treats it as zero on your NJ-1040. Per the NJ Division of Taxation, net losses in this category cannot be carried back or carried forward, and they cannot offset income in any other category such as wages, interest, or dividends. The loss simply does not flow through. This is not the same as the loss disappearing within the year: net gains and losses within the category are computed first. It is only when that netting produces an overall loss that NJ treats the result as zero.

For a noncorporate taxpayer holding the digital asset as a capital asset, federal treatment generally allows an ordinary-income offset equal to the smaller of the net capital loss or $3,000 ($1,500 if married filing separately), with unused loss carrying forward with its short- or long-term character preserved. Corporate, inventory, dealer, business-property, and other facts follow their separate loss and carryover rules. Applying the federal rule to the NJ category would misstate the state calculation.

One additional note relevant for NJ filers and all states: Form 1099-DA is not included in the Combined Federal/State Filing Program for TY2025. This is a nationwide exclusion for the form's inaugural year, confirmed for TY2025 and subject to change in future years. No state revenue department automatically receives the form through that program for TY2025; the exclusion does not establish whether information can arrive through another channel. Keep your records and your state return consistent with your federal filing.

Section 5: How Does the FASB Fair Value Shift Affect Business Owners on Form 1099-DA?

If your entity holds cryptocurrency on its balance sheet, Tax Year 2025 brings an accounting change entirely separate from the 1099-DA.

FASB ASU 2023-08 (codified at ASC 350-60) is effective for all entities (public, private, and nonprofit) for fiscal years beginning after December 15, 2024, with early adoption permitted. For calendar-year entities applying U.S. GAAP, 2025 is the first mandatory adoption year. The standard applies to crypto assets that meet the ASU's scope criteria: the asset must be fungible, must not provide the holder with enforceable rights or claims on underlying goods, services, or other assets, and must meet the other criteria specified in ASC 350-60-15. NFTs are excluded because they are not fungible. Some wrapped tokens and stablecoins may also fall outside scope because of the enforceable rights criterion; confirm scope with your GAAP adviser for each specific holding before assuming the standard applies. For in-scope assets, the standard replaces the previous indefinite-lived intangible asset model with mandatory fair value accounting. You are no longer just testing for impairment. You are marking in-scope crypto holdings to fair value at each reporting period.

Key transition item: The amendments require a cumulative-effect adjustment to opening retained earnings, or another appropriate component of equity or net assets, as of the beginning of the annual reporting period in which the entity adopts them. The amount and materiality depend on the entity and its in-scope holdings; document the transition computation even when no crypto was sold during the year. Consult your GAAP adviser and review the FASB project summary for ASU 2023-08 for the full transition requirements applicable to your entity.

Your 1099-DA covers dispositions. The fair value measurements and disclosures required under ASC 350-60 cover the holdings you still own at year-end. Both may affect external GAAP reporting in 2025; consult a qualified GAAP adviser; Monaco CPA does not provide external financial-reporting services, and fractional CFO support is available only under a separate written scope.

Section 6: CPA Corner

For CPAs reviewing 2025 crypto returns, records that may be relevant include:

• Available broker or platform transaction histories, CSV or API exports, and statements for activity handled in 2025
• Transfer history including wallet addresses and transfer dates
• Prior-year disposition records, including any timely adequate Specific Identification and the applicable default-order treatment, per wallet and account
• Fee and transaction-cost records sufficient to determine whether a cost is allocable to an acquisition, disposition, separate fee-token disposition, or another activity, and whether Box 1f already reflects it
• Rev. Proc. 2024-28 safe harbor allocation documentation: confirm which method was elected; for Global Allocation, confirm the methodology was documented in books and records before January 1, 2025 (per Section 3.10, defined as immediately after close of December 31, 2024) and that the mathematical allocation was completed before the later of the first sale, disposition, or transfer of each asset type on or after January 1, 2025, or the applicable 2025 return deadline in Section 5.02(4)(b) per Section 5.02(5)(b); for Specific Unit Allocation, confirm the timestamp required by Section 5.02(4)(a). Separately, Notice 2025-7 as extended by Notice 2026-20 permits identification of eligible broker-custodied units sold, disposed of, or transferred through December 31, 2026 either in the taxpayer's books and records no later than the transaction time or through a sufficiently specific standing order recorded before the transaction, without broker confirmation. Until the Global Allocation is completed, Section 5.02(5)(c) permits identification of remaining units sold, disposed of, or transferred only through a standing order or instruction communicated to the broker or recorded in the taxpayer’s books and records; that order must be applied when selecting those units after the allocation is complete.
• Any 1099-MISC, 1099-INT, or other statements for staking, earn, or referral rewards; note Rev. Rul. 2023-14 as the governing authority on staking VALIDATION rewards. Exchange earn/lending interest and referral rewards are outside that ruling's facts - they are analyzed under general gross-income and accounting-method principles (§61/§451) and are generally treated as ordinary income when received or credited, as a practitioner position
• Documentation of any completed loss transactions, especially wrapped-token or liquid-staking-token transactions whose treatment can be fact-specific
• Whether any digital assets were reported on Form 1099-B rather than Form 1099-DA; the IRS sources do not settle whether a properly issued Form 1099-B for a tokenized asset routes to Form 8949 boxes A/B/D/E or G through L, so check current IRS guidance and the software treatment and keep the form
• For business clients applying U.S. GAAP: year-end fair value measurements for in-scope crypto holdings under ASC 350-60, with scope confirmation for each holding type including NFTs, wrapped tokens, and stablecoins, and documentation of the cumulative-effect adjustment or supported zero result

One additional note relevant for all states: Form 1099-DA is not part of the Combined Federal/State Filing Program for TY2025. This nationwide exclusion means no state automatically receives the form through that program; it establishes nothing about receipt through another channel. This matters especially for NJ filers given the state's distinct disposition-category treatment.

What Should I Check Before Filing My Return With a 1099-DA?

• Check the "Applicable checkbox on Form 8949" field on your 1099-DA: per the 1099-DA instructions, Code Y signals that the broker could not determine your holding period, so it could not pick Box H vs. Box K (for 2025 sales a broker that does not report basis is told to use Code Y, and Box H and Box K are both basis-not-reported boxes, so Code Y also signals that basis is not being reported); determine short vs. long-term from your own records and use Box H or Box K; if your records cannot establish the acquisition date, reporting the position as short-term is the cautious choice for a gain, not an explicit IRS rule; note that the 2025 Form 8949 instructions reference Code X in certain contexts for unknown holding period. Follow the code printed on your actual 1099-DA
• Use G/H/I or J/K/L for digital-asset capital-asset dispositions reported on Form 1099-DA or not reported on any form; if you received a Form 1099-B for a tokenized asset, the IRS sources do not settle whether boxes A/B/D/E or G through L apply, so route the transaction from the actual form, basis-reporting, and holding-period facts, verify your software's handling, and retain the form; a noncollectible Code G/J transaction may bypass Form 8949 for direct reporting on Schedule D line 1a or 8a only when basis was reported, Boxes 1h and 1i show no adjustment, the Ordinary box in Box 6 is not checked, and the taxpayer needs no adjustment to basis, gain-or-loss type, or gain or loss
• When basis is blank or missing (Box H or K), enter reconstructed cost in Column (e) only. You are filling in information the broker did not provide, not contradicting a reported figure; use Adjustment Code B in Column (f) only when a specific basis figure was reported but is incorrect; enter Code E in Column (f) with a negative amount in parentheses in Column (g) when adjusting for uncaptured sell-side costs; keep documentation to respond to any IRS substantiation request
• If you see $0 in Box 1g and your records support a nonzero adjusted basis, treat it as a likely broker error: the 1099-DA instructions direct brokers to enter $0 only if the asset's adjusted basis is actually zero. Substantiate your adjusted basis and document it
• Verify Date Acquired for transferred-in assets from original purchase records. Box 1d can be blank under the conditions listed in its instructions; Box 12b is left blank when assets were transferred in on a variety of dates and may be blank under an optional reporting method. A blank field does not establish that no transfer occurred
• Reconcile Boxes 12a and 12b transfer-in information to the actual acquisition, holding-period, wallet, and transfer records
• Confirm per-wallet and per-account basis tracking (required under Treas. Reg. §1.1012-1(j)); under the Rev. Proc. 2024-28 transition safe harbor, Global Allocation methodology must have been documented in books and records before January 1, 2025 (defined as immediately after close of December 31, 2024 per Section 3.10), with mathematical allocation completed before the later of the first sale, disposition, or transfer of that asset type on or after January 1, 2025, or the applicable 2025 return deadline in Section 5.02(4)(b) per Section 5.02(5)(b); Specific Unit Allocation documentation must satisfy Section 5.02(4)(a). Separately, Notice 2025-7 as extended by Notice 2026-20 permits identification of eligible broker-custodied units sold, disposed of, or transferred through December 31, 2026 either in your books and records no later than the transaction time or through a sufficiently specific standing order recorded before the transaction, without broker confirmation. Until the Global Allocation is completed, Section 5.02(5)(c) permits identification of remaining units sold, disposed of, or transferred only through a standing order or instruction communicated to the broker or recorded in the taxpayer’s books and records; that order must be applied when selecting those units after the allocation is complete.
• If you receive a stablecoin 1099-DA, check boxes 11a and 11b to see if the aggregate alternative method was used; if no stablecoin 1099-DA was issued, designated stablecoin sales may not have been required to be reported under the optional method, but your reporting obligations remain
• When applying PDAP de minimis thresholds, optional method exclusions for stablecoins and specified NFTs are applied first; remaining non-excluded PDAP sales are then tested against the $600 aggregate annual threshold; verify all transactions below thresholds are still captured in your own records
• For NFT creators and minters: if the broker used optional aggregate reporting, proceeds appear in Box 11c rather than Box 1f; do not look for proceeds in Box 1f for these transactions
• Locate staking and earn income on 1099-MISC, 1099-INT, or other statements, not on 1099-DA; Rev. Rul. 2023-14 governs staking VALIDATION rewards, while exchange earn/lending interest is analyzed under general gross-income and accounting-method principles (§61/§451) and is generally treated as ordinary income when received or credited, as a practitioner position
• Apply the acquisition- and disposition-side digital-asset transaction-cost rules to the actual facts; reconcile Box 1f, analyze any separate fee-token disposition, and do not double count
• Reconcile the actual Form 1099-DA with available broker or platform, wallet or on-chain, acquisition, transfer, lot, fee, and other records; no single source necessarily represents the complete return ledger
• NJ-1040 filers: for supported property dispositions included in the disposition category, net gains and losses for the year; if the net result is a loss, NJ treats it as zero with no carryforward and no offset against other income. The CF/SF exclusion means no state automatically received Form 1099-DA through that program for TY2025; it establishes nothing about other channels
• Business owners applying U.S. GAAP: confirm ASU 2023-08 (ASC 350-60) scope for each holding type including NFTs, wrapped tokens, and stablecoins; for in-scope holdings, confirm the required fair value measurements and disclosures and document the cumulative-effect adjustment or supported zero result
• Watch for late or corrected 1099-DA; Notice 2024-56 provides first-year penalty relief for good-faith filing efforts, and Notice 2025-33 extends specified backup-withholding and penalty relief for 2026 and limited 2027 situations, not the Form 1099-DA furnishing deadline

How Long Do I Need to Keep My Crypto Basis Documentation?

Apply the retention period to the actual return and records. For federal assessment, IRS Topic 305 states a general three-year period from filing, treats an early-filed return as filed on its due date, describes a six-year period when omitted income exceeds 25% of gross income shown, and states no assessment limit for fraud or no valid return. Separately, a federal refund claim generally uses the later of three years from filing the original return or two years from payment, subject to lookback limits, deemed dates, and statutory exceptions. For an asset you still hold, keep acquisition and basis records through the eventual disposition and the applicable limitations period for that disposition return. New Jersey and other jurisdictions have separate assessment and refund periods and possible extensions. Retain the following records for the applicable periods:

• Exchange transaction history CSVs for every platform used
• Transfer records including wallet addresses, dates, and amounts
• Original purchase confirmations or order history screenshots
• Documentation of any timely adequate Specific Identification and the applicable default-order treatment
• Rev. Proc. 2024-28 safe harbor allocation documentation if applicable
• Fair market value, dominion-and-control, restriction, market-access, and inclusion records for staking rewards, airdrops, or mining income at the applicable inclusion time
• Any correspondence with exchanges regarding corrections to your 1099-DA
• The 1099-DA itself (retain every version including corrected forms)

The IRS may request substantiation through correspondence or examination. Retained records support the treatment reported on the return but do not guarantee an examination result.

What happens if I file with $0 basis and later find my records?

If supported records are found after filing, compare them with the filed return and current Form 1040-X instructions. Amend when the filed return is incorrect and the current instructions and applicable law call for an amended return; acceptance or a refund is not guaranteed.

Can I amend my return if a corrected 1099-DA arrives after I file?

Compare a corrected Form 1099-DA with the filed return and current Form 1040-X instructions. Amend when the filed return is incorrect and the current instructions and applicable law call for an amended return. A refund claim is generally timely only if filed by the later of three years from filing the original return or two years from payment, and IRC Section 6511 lookback limits can cap the refundable amount; extensions, deemed filing dates, and statutory postponements can change the calculation.

Quick FAQ

If my 1099-DA shows blank or $0 basis, do I just match it?

No. A blank basis on your 1099-DA means the broker did not provide that information. It is not a figure reported to the IRS that you need to match. When you enter your substantiated adjusted basis in Column (e) of Form 8949 using Box H or K, you are filling in information the broker did not provide, not contradicting a reported figure. Retain documentation that supports the reported position if the IRS requests substantiation through correspondence or examination. If you see $0 in Box 1g and your records support a nonzero adjusted basis, treat it as a likely broker error - the instructions direct brokers to enter $0 only when adjusted basis is genuinely zero. Substantiate your adjusted basis regardless.

Are stablecoin transactions taxable?

A sale or exchange of a stablecoin is a disposition. If the stablecoin was held as a capital asset, recognize capital gain or loss even when the net change is minimal; inventory, business-use, and other character facts can produce a different reporting route. If your broker used the optional reporting method, designated stablecoin sales are not required to be reported when aggregate proceeds stay at or under $10,000 with that broker for the year. That information-return threshold does not remove the taxpayer's reporting obligation for a taxable disposition.

Do transfers between my own wallets trigger a taxable event?

A transfer of the same asset between wallets under the same beneficial ownership generally is not a disposition. Preserve the transferred units' basis, holding period, fees, wallet addresses, and dates. This answer does not classify a bridge, wrap, receipt-token exchange, or other transaction that changes the asset or rights involved.

What if I did not receive a 1099-DA?

Taxable transactions remain reportable even when no information return is furnished. Use Box I for short-term or Box L for long-term capital-asset dispositions not reported on Form 1099-B or Form 1099-DA; receipts, business assets, and other character classifications follow their applicable reporting rules. Keep the supporting exchange and on-chain records.

Do wash-sale rules apply to crypto for TY2025?

For TY2025, Section 1091 generally did not apply to standard digital assets treated as property. The treatment of wrapped or liquid-staking tokens can be fact-specific. This is education only; Monaco CPA does not recommend or execute harvesting transactions.

Will my staking or DeFi activity appear on my 1099-DA?

Not necessarily. The actual reporting broker, transaction, and applicable reporting rule control. The DeFi broker reporting rule (T.D. 10021) was repealed by Congress via the Congressional Review Act, signed April 10, 2025, and has no legal force. This repeal relates to the non-custodial DeFi "trading front-end services" rule and does not eliminate 1099-DA reporting by custodial brokers. Pure on-chain DeFi activity without a reporting broker intermediary generally will not appear on Form 1099-DA, while activity handled by a reporting broker may. Brokers do not report rewards and staking payments on Form 1099-DA, and Notice 2024-57 addresses additional specified transaction structures for TY2025. Absence from Form 1099-DA does not determine substantive timing or character; apply the governing law to the transaction records.

What if I can't find my original purchase records?

Use available exchange account history, email confirmations, bank or credit-card statements, transfer statements, and on-chain transaction data to reconstruct acquisition records. If supported basis cannot be established, apply the current form instructions and evidentiary rules to the available facts; this article does not prescribe a default amount.

Need a CPA to reconcile your 1099-DA?

Form 1099-DA adds standardized third-party proceeds reporting for covered broker activity. Reconcile it to the complete transaction records rather than treating the form as a complete return ledger.

Learn about the 1099-DA Reconciliation Service or use the contact form to request a written scope if you want help reconciling an actual form to supporting records.

Sources: IRS Instructions for Form 1099-DA (2025 and 2026) and 2025 Corrections | IRS Instructions for Form 8949 (2025) | IRS Fact Sheet FS-2025-06 | IRS Digital Asset FAQs 53, 56, 66, 72, 81, and 97-99 | Rev. Proc. 2024-28 | Notice 2024-56 | Notice 2024-57 | Notice 2025-7 | Notice 2025-33 | Notice 2026-20 | Reg. §§1.1001-7, 1.1012-1(h), 1.1012-1(j), and 1.6045-1 | Rev. Rul. 2023-14 | FASB ASU 2023-08 (ASC 350-60) | NJ Division of Taxation, NJ-1040 Instructions and Rate Schedules | H.J.Res.25 / Public Law 119-5 (DeFi rule repeal)

Additional sources: IRS Form 1099-DA instructions (2025) (opens in a new tab) | Form 1099-DA corrections (opens in a new tab) | Rev. Rul. 2019-24 | IRC Sections 1091 and 6511 | Form 1040-X instructions | S. 2207 and H.R. 10357, 119th Congress (not enacted as described in the dated checkpoint).

Informational only, not tax advice.

Gregory Monaco, CPA | New Jersey CPA license | New Jersey CPA firm registration | 1099-DA reconciliation information | Monaco CPA: monacocpa.cpa

Key Takeaway

Form 1099-DA is being issued for the first time for Tax Year 2025. Brokers are not required to report basis for 2025 sales. Reconcile an actual form against the exchange CSV and other records, reconstruct supported basis where it is blank, verify any reported $0, and route capital-asset dispositions reported on Form 1099-DA, or not reported on any form, to the applicable Form 8949 boxes (G/H/I for short-term, J/K/L for long-term); a Form 1099-B for a tokenized asset needs the separate routing review described in Check 1.

Prediction-market records: Digital-asset information returns may not explain event-contract activity or establish its classification. Reconcile the actual wallet and platform records, and keep a records-first approach without inferring a filing position.

Related reading: 5 Crypto Activity Categories a Form 1099-DA May Not Report | Crypto Cost Basis Methods | How NJ Taxes Crypto | Crypto tax services

Frequently Asked Questions

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