Whatnot Seller Taxes: The Complete CPA Guide for Collectible Resellers

Every dollar you earn selling on Whatnot is taxable income, whether you receive a 1099-K or not. Whatnot processes payments through Stripe. Stripe is required to issue a federal 1099-K only if you exceed BOTH thresholds in a year: more than $20,000 in gross payments AND more than 200 transactions (OBBBA §70432 restored these thresholds under amended IRC §6050W). NJ has a stricter state threshold of $1,000 with no transaction minimum, so NJ-resident sellers often receive a state-triggered 1099-K well below the federal threshold. When a 1099-K is issued, it reports your gross sales - including shipping charges - before deducting commissions, processing fees, or refunds. If your 1099-K shows $47,000 but you only deposited $38,000, that $9,000 gap is not missing money - it is platform fees, shipping, and refunds that you deduct on Schedule C. Getting this reconciliation wrong is the single most common mistake Whatnot sellers make, and it is the fastest way to overpay your taxes or trigger an IRS CP2000 notice.

This guide covers collectible resellers at every level - from someone flipping $200 in Pokémon cards on a weekend stream to six-figure sports card operations running simultaneous Whatnot, eBay, and Mercari shops. The most common tax mistakes are remarkably consistent: reporting net deposits instead of gross 1099-K amounts, failing to track cost basis on inventory purchased at card shows and from breaks, ignoring grading fees that should be capitalized to the card's basis, and skipping quarterly estimated payments until penalties arrive. This guide addresses every one of those mistakes with specific IRC citations and practical solutions.

This guide covers the complete tax picture with IRC citations and practical solutions. Tax law and figures were reviewed through July 15, 2026; platform fee numbers were checked July 2026 and change frequently - always verify against Whatnot's live fee page before relying on them. Examples use tax year 2026 assumptions unless labeled otherwise. For resellers who also sell on Poshmark, eBay, Depop, and similar platforms, the complete reseller tax guide covers those platforms in detail.

In This Article

1. How Whatnot Works and Why It Creates Unique Tax Issues
2. The 1099-K: What Whatnot Reports and What You Actually Owe
3. COGS for Collectibles: Cost Basis Tracking for Cards, Comics, and Sneakers
4. Grading Fees: COGS or Business Expense?
5. Hobby vs. Business: The IRC 183 Nine-Factor Test
6. Income Scenarios at Five Revenue Levels
7. Common Mistakes That Cost Whatnot Sellers Thousands
8. NJ-Specific Tax Rules for Collectible Sellers
9. Every Deduction You Can Claim
10. Entity Structure: Sole Prop to LLC to S-Corp
11. Frequently Asked Questions

How Whatnot Works and Why It Creates Unique Tax Issues

Whatnot is a live auction marketplace where sellers stream in real time to sell sports cards, Pokémon cards, trading cards, comics, sneakers, vintage toys, coins, and other collectibles. Unlike eBay's static listings or Mercari's simple buy-it-now format, Whatnot combines entertainment with commerce - sellers run live shows, break sealed product on camera, and auction individual items to engaged audiences. This live-selling model creates specific tax complications that do not exist on traditional resale platforms.

The fee structure is straightforward but impacts your tax math. Whatnot charges an 8% commission on the final sale price (reduced to 4% on coins and money, 5% on electronics), plus a 2.9% + $0.30 payment processing fee on the total order value including item price, shipping, and buyer-paid tax. There are no listing fees and no monthly subscription costs. Promotional 0% commission tier: Whatnot has applied a 0% commission rate on the portion of any single sale above $1,500 in eligible categories - collectibles, comics, toys/hobbies, trading cards, sports singles, and coins/money. The 8% (or category-reduced rate) still applies to the first $1,500 of the sale; everything above $1,500 is commission-free for the listed categories. This is material for high-value card sellers - verify current eligibility on Whatnot's fee page before projecting taxes, as promotional tiers change. Seller earnings become available within 4 hours of confirmed delivery, with an Early Payout program for qualifying sellers.

Whatnot operates as a marketplace facilitator in all U.S. states and territories with marketplace facilitator laws - effectively every state with a sales tax. This means Whatnot collects and remits sales tax on your behalf. You do not separately collect or remit sales tax on Whatnot transactions. However, in certain states, Whatnot charges sales tax on its own fees to sellers: commission fees are taxed in DC, Hawaii, New Mexico, and West Virginia, and processing fees are taxed in Connecticut, Hawaii, New Mexico, Ohio, South Dakota, Texas, and West Virginia.

The live auction format creates a unique COGS challenge. A card breaker purchases a $500 sealed box, sells 30 spots at various prices totaling $750, opens cards live, and ships cards to spot holders. The cost basis allocation across spots, retained cards, and unsold inventory requires careful tracking that most sellers never establish from day one. I will cover the mechanics in the COGS section below.

The 1099-K: What Whatnot Reports and What You Actually Owe

Whatnot issues Form 1099-K via Stripe by January 31 for sellers meeting the federal reporting threshold. Under the One Big Beautiful Bill Act (OBBBA, Public Law 119-21, Section 70432), signed July 4, 2025, the federal threshold was permanently restored to more than $20,000 in gross payments AND more than 200 transactions per platform. The ARPA $600 threshold was repealed retroactively as if it never existed.

What the 1099-K includes: Gross transaction amounts including shipping charges collected from buyers, before deducting commissions, processing fees, refunds, or chargebacks. Sales tax collected and remitted by Whatnot as marketplace facilitator is generally excluded from the gross amount.

Where to find your tax documents: The 1099-K appears in the Tax Documents tab in Seller Hub. Your Annual Seller Statement - the true source of truth for fee reconciliation - is located under Statements in the Financials section. A cash-out or balance transfer to Stripe or PayPal does not itself trigger Form 1099-K. Reconcile any form actually issued for covered payment-settlement transactions to the same underlying sales so overlapping forms are not double-counted.

State thresholds are lower than federal. New Jersey requires 1099-K issuance at $1,000 with no transaction minimum. Several other states maintain sub-federal thresholds: Vermont, Massachusetts, Maryland, and Virginia at $600; Illinois at $1,000 with 4+ transactions; Arkansas at $2,500. A NJ-based Whatnot seller earning $5,000 will receive a state-triggered 1099-K from Stripe even though the federal threshold was not met.

The reconciliation on Schedule C works as follows: Report the full 1099-K amount (or your actual gross if higher) on Line 1 (Gross Receipts). Report returns and allowances on Line 2. Cost of Goods Sold flows through Part III to Line 4. Platform fees, shipping costs, and processing fees are deducted as business expenses in Part II. The result on Line 31 (Net Profit) is your actual taxable amount. For a complete walkthrough on handling a 1099-K, see my 1099-K guide.

The critical trap: If you report only bank deposits (the net amount after Whatnot's 8% commission and 2.9% processing fee) instead of the 1099-K gross, the IRS Automated Underreporter system flags the discrepancy and generates a CP2000 Notice - a proposed adjustment adding tax on the "missing" income plus interest and potential accuracy-related penalties under IRC Section 6662. Over 4 million CP2000 notices are sent annually. Always start with gross, then deduct.

COGS for Collectibles: Cost Basis Tracking for Cards, Comics, and Sneakers

Cost of Goods Sold is typically the single largest deduction for Whatnot sellers, and it is the one most people get wrong. COGS is calculated on Schedule C, Part III (Lines 35-42) and flows to Line 4 of Part I, reducing gross income before any other deductions are applied.

The formula: Beginning Inventory + Purchases - Ending Inventory = COGS.

Under IRC Section 1012(a), basis equals cost. Most Whatnot sellers qualify as small business taxpayers under IRC Section 471(c) (opens in a new tab) (average gross receipts of $32 million or less for 2026), which allows simplified inventory treatment: cash method accounting, inventory treated as non-incidental materials and supplies under Treas. Reg. Section 1.162-3, and complete exemption from UNICAP rules under IRC Section 263A.

Cost Basis for Individual Card Purchases

When you buy a single graded card at a card show for $150 and sell it on Whatnot for $300, the basis is straightforward: $150 is your COGS for that item. Keep the receipt, photograph it if it is thermal paper (it will fade), and log it in your tracking system with a description matching the card.

Cost Basis for Sealed Product and Breaks

This is where COGS gets complicated. When a card breaker purchases a sealed box of sports cards for $500 and sells spots to 30 participants, the entire box cost is COGS aggregated against total spot revenue for that break. No allocation among individual spots is required. If you sold 30 spots totaling $750, your COGS for that break is $500 and your gross profit is $250, before fees.

Cards the breaker retains have a basis equal to their proportional share of the box cost under Treas. Reg. Section 1.61-6(a). If you keep a card from a $500 box that contained 300 cards, and the retained card's fair market value represents roughly 10% of the total value pulled, its allocated basis is approximately $50. That allocated cost cannot be claimed as COGS in the current year - it remains in ending inventory. If you later sell the retained card, the allocated basis determines your gain or loss.

Cost Basis for Lot Purchases

When you buy a bulk lot of 200 cards for $400 at a card show, Treas. Reg. Section 1.61-6(a) requires equitable apportionment. Two approaches are defensible: equal allocation when items are substantially similar (200 commons at $2 each) and relative fair market value allocation when items have disparate values. If the lot contains a card worth $100 and 199 commons worth $1.50 total each, the FMV method allocates more basis to the valuable card proportionally. Use the method that best reflects economic reality and apply it consistently.

The Cohan Rule for Missing Records

When you can prove an expense was incurred but cannot substantiate the exact amount, Cohan v. Commissioner (39 F.2d 540, 2d Cir. 1930) allows courts to estimate a reasonable basis. This applies to cost basis, not just deductions. Historical pricing databases - PSA auction prices, eBay sold listings, Beckett guides, COMC data, 130point.com - can provide the rational basis required for Cohan estimation. This is a last resort, not a planning strategy. Track everything from day one.

Grading Fees: COGS or Business Expense?

PSA, BGS (Beckett Grading Services), CGC (Certified Guaranty Company for comics), and SGC submission fees create a tax classification question that depends on timing.

If the graded card is sold in the same tax year it was graded, the grading fee can be expensed as an ordinary and necessary business expense under IRC Section 162(a) (opens in a new tab). Report it on Schedule C as a business expense.

If the graded card remains in inventory at year-end, the grading fee should be capitalized to the card's basis - added to your cost of the card. This is the more conservative and technically correct treatment under IRC Section 263A (opens in a new tab) for costs that directly benefit the property. When you eventually sell the card, the capitalized grading fee becomes part of your COGS, reducing your taxable gain.

Practical example: You buy a raw Pokémon card for $50, pay PSA $30 to grade it, and it comes back a PSA 10. If you sell it on Whatnot in the same year for $500, you can either (a) claim $50 COGS plus $30 grading expense, or (b) claim $80 COGS. The tax result is identical. But if that PSA 10 sits in your inventory on December 31, the $30 grading fee should be capitalized to the card's $80 basis, not expensed currently. Most small-business card sellers are exempt from the strict UNICAP rules, but capitalizing grading fees to inventory is still the sound approach.

Hobby vs. Business: The IRC Section 183 Nine-Factor Test

This classification is the single most consequential determination for collectible sellers. Under hobby classification, income is reported on Schedule 1, Line 8z as "Other Income." A hobbyist may still recover cost of goods sold (the basis of the items actually sold) against the sale proceeds - what is disallowed is every operating and selling expense (platform fees, shipping, supplies, mileage, home office). The Tax Cuts and Jobs Act suspended miscellaneous itemized deductions (the only category that historically allowed hobby operating-expense deductions) through 2025, and the OBBBA permanently eliminated them. The hobby expense trap is now permanent, not temporary.

The devastating impact: take a seller with $40,000 in gross sales whose $35,000 of total outlay breaks into $25,000 of COGS (the cost of the cards sold) and $10,000 of operating/selling expenses (platform fees, shipping, supplies, mileage). Classified as a hobbyist, the seller still nets the $25,000 COGS against the $40,000 of proceeds but loses the entire $10,000 of operating expenses - so income tax falls on $15,000. Business classification allows all $35,000 on Schedule C, taxing only the $5,000 net profit. At a combined 30%+ rate, that difference (an extra $10,000 of taxable income) is roughly $3,000 in unnecessary taxes.

Under business classification, ordinary and necessary expenses are deductible on Schedule C under IRC Section 162. Schedule C profit generally receives the 92.35% Schedule SE adjustment; the resulting net earnings are subject to the regular 12.4% Social Security and 2.9% Medicare rates, with the Social Security component limited by the remaining wage base. The employer-equivalent portion of regular SE tax is generally deductible above the line under IRC Section 164(f). Classification follows the facts, not whichever result produces less tax.

The Nine Factors Under Treasury Regulation Section 1.183-2(b)

No single factor is determinative, and a numerical majority does not decide the outcome:

1. Manner of carrying on the activity (Section 1.183-2(b)(1)): Maintaining books, records, a separate bank account, and operating in a businesslike manner. Card sellers should use accounting software, track every purchase and sale, and maintain organized inventory records.

2. Expertise of the taxpayer or advisors (Section 1.183-2(b)(2)): Studying market trends, understanding grading standards, and consulting a CPA. The regulation directs attention to preparation through study of the activity's accepted business and economic practices, so product knowledge on its own carries less weight than business and economic expertise.

3. Time and effort expended (Section 1.183-2(b)(3)): Running regular Whatnot live streams on a set schedule, sourcing inventory, packaging, and shipping demonstrates significant commitment. A seller streaming 3-4 nights per week is clearly devoting substantial effort.

4. Expectation of asset appreciation (Section 1.183-2(b)(4)): Holding graded vintage cards or sealed wax products that historically appreciate supports profit motive.

5. Success in similar activities (Section 1.183-2(b)(5)): Prior profitable experience on eBay, Mercari, or at card shows counts in your favor.

6. History of income or losses (Section 1.183-2(b)(6)): Continued losses beyond a normal startup period are problematic, though card market downturns (like the 2023 sports card correction) can explain temporary losses.

7. Amount of occasional profits (Section 1.183-2(b)(7)): A single high-value pull or a price spike that generates a large profit in one year carries significant weight.

8. Financial status of the taxpayer (Section 1.183-2(b)(8)): Substantial other income combined with consistent card-selling losses raises IRS suspicion that the activity is a tax shelter rather than a genuine business.

9. Elements of personal pleasure (Section 1.183-2(b)(9)): This is the most dangerous factor for collectors. The governing language comes from Jackson v. Commissioner, 59 T.C. 312, 317 (1972): "suffering has never been made a prerequisite to deductibility." The Seventh Circuit applied the same principle in Roberts v. Commissioner, 820 F.3d 247 (7th Cir. 2016). Enjoyment alone does not disqualify an activity - but it is the factor the IRS leans on hardest when challenging card sellers.

The 3-Out-of-5-Year Safe Harbor

If gross income exceeds deductions in 3 of the last 5 consecutive years (IRC Section 183(d) (opens in a new tab)), a rebuttable presumption of profit motive shifts the burden of proof to the IRS. Whatnot sellers with consistent positive cash flow should document this carefully. Form 5213 allows taxpayers to postpone the determination but extends the statute of limitations - I rarely recommend filing it.

Income Scenarios at Five Revenue Levels

All calculations use confirmed 2026 parameters: standard deduction of $16,100 single / $32,200 MFJ, Social Security wage base of $184,500, and post-OBBBA brackets. Schedule C profit is generally multiplied by 92.35% on Schedule SE to determine net earnings; the regular 12.4% Social Security and 2.9% Medicare rates then apply, subject to the remaining wage base. The QBI deduction under IRC Section 199A is now permanent. Collectible reselling generally is not an SSTB, but required QBI reductions, the taxable-income ceiling, and wage/property limits still apply.

The side-hustle scenario assumes $75,000 of W-2 wages and shows the approximately $270 of additional federal income tax attributable to the Whatnot activity after the deductible half of SE tax and QBI. At the part-time level and above, the table assumes no other income. Effective rate includes regular SE tax and federal income tax on the Whatnot net profit, but not Additional Medicare Tax, credits, or state tax. Use the SE tax calculator to model your facts.

Key takeaway from this table: The federal burden depends heavily on other income: the modeled $1,650 side-hustle profit bears about a 30.5% incremental federal burden because the owner already has $75,000 of wages, while the no-other-income examples follow different brackets and deduction limits. Documented COGS and business expenses reduce Schedule C profit. An S-Corp result cannot be inferred from revenue or profit alone; use the S-Corp calculator as a starting point for a full-return model.

Common Mistakes That Cost Whatnot Sellers Thousands

These are the most common errors on Whatnot seller returns. Every one of them is avoidable.

1. Reporting Net Deposits Instead of Gross 1099-K Amounts

Potential cost: CP2000 notice, penalties, and interest

Your 1099-K from Stripe reports gross sales. Your bank deposits reflect net payouts after Whatnot's 8% commission, 2.9% + $0.30 processing fee, refunds, and chargebacks. On $50,000 of gross sales, percentage fees alone are $5,450 ($4,000 + $1,450), plus $0.30 per order. More than 1,833 orders would push those stated fees above $6,000 even before substantiated refunds or chargebacks. Reconcile actual statements: report gross receipts first, then deduct allowable fees and other expenses.

2. Failing to Track Cost Basis on Inventory

Potential cost: $2,000-$10,000+ in lost COGS deductions

COGS is typically 40-55% of gross sales for collectible resellers. A seller with $50,000 in gross sales and $25,000 in inventory costs who fails to track and claim COGS pays taxes on $25,000 of phantom income. At a 30% combined rate, that is $7,500 in unnecessary taxes. Photograph every receipt, log every card show purchase, and reconcile inventory quarterly.

3. Expensing Grading Fees on Cards Still in Inventory

Potential cost: Audit adjustment, penalties on overstated deductions

PSA and BGS grading fees on cards that remain unsold at year-end should be capitalized to the card's basis, not expensed in the current year. The IRS can reclassify these as improper current-year deductions during an audit. If the card sells the following year, the timing difference matters for tax purposes.

4. Ignoring the NJ Resale Certificate (Form ST-3)

Potential cost: 6.625% on every inventory purchase

If you buy inventory at NJ card shows or from NJ-based wholesalers without presenting a valid NJ Form ST-3 (Resale Certificate), you pay the full 6.625% NJ sales tax on purchases meant for resale. On $20,000 in annual inventory purchases, that is $1,325 in unnecessary sales tax. The resale certificate is free and available through the NJ Division of Revenue.

5. Missing Quarterly Estimated Tax Payments

Potential cost: $500-$3,000+ in penalties

Whatnot sellers with W-2 day jobs are especially vulnerable - their withholding does not account for self-employment income. If you expect to owe $1,000 or more federally or more than $400 in NJ after withholding and credits, quarterly payments are required. IRS underpayment interest changes quarterly - for example, 6% for Q2 2026 (Q1 was 7%); always check IRS.gov/payments/quarterly-interest-rates for the current rate. Interest compounds daily. Set aside 25-30% of net profit from each sale into a separate tax reserve account.

6. Not Separating Personal Collection Sales from Business Inventory

Potential cost: Incorrect tax treatment, missed capital gains rates

If you sell a card from your personal collection that you have held for over a year, it may qualify for long-term capital gains treatment (generally capped at 28% under IRC Section 1(h)(5), reflecting the prevailing treatment of cards as collectibles) rather than ordinary income on Schedule C. Commingling personal collection sales with business inventory on a single Schedule C can result in paying higher self-employment tax on items that should receive capital gains treatment - or conversely, claiming business deductions against investment-type income.

7. Forgetting to Track Mileage to Card Shows and the Post Office

Potential cost: $500-$2,000+ in missed deductions

The standard mileage rate is 72.5 cents per mile for January 1-June 30, 2026, and 76 cents per mile for July 1-December 31, 2026 (midyear increase per IRS Announcement 2026-11). A seller driving 50 miles round-trip to a weekly card show (52 trips) plus 20 miles round-trip to the post office twice a week (104 trips) logs approximately 4,680 business miles - roughly a $3,475 deduction at the split 2026 rates. At a 30% combined rate, that saves roughly $1,042. Keep a mileage log with date, destination, purpose, and miles.

8. Treating All Sales as Ordinary Income When Some Are Capital Gains

Potential cost: Unnecessary SE tax on investment-held items

If you purchased a graded vintage card three years ago as a personal investment (not inventory for your business) and sell it on Whatnot for a profit, that gain is a long-term collectible capital gain - not ordinary business income. Capital gains are not subject to the 15.3% self-employment tax. The distinction between dealer inventory (ordinary income) and investment property (capital gains) depends on your intent at the time of purchase and your pattern of activity. Regular Whatnot streamers with high-volume sales are almost certainly dealers for most items - but that does not mean every item in your possession is inventory.

9. Ignoring the QBI Deduction

Potential cost: a fact-specific federal deduction left unclaimed

The Qualified Business Income deduction under IRC Section 199A can equal up to 20% of QBI. Collectible reselling generally is not an SSTB, but the taxable-income ceiling and W-2 wage/property limitations still apply. On $50,000 of Schedule C profit with no allocable health-insurance or retirement deduction, the preliminary amount is about $9,294 after subtracting half of SE tax; that is about $2,045 at a 22% marginal rate before other limits.

10. Not Deducting Whatnot and Stripe Processing Fees

Potential cost: $1,000-$5,000+ in missed deductions

Whatnot's commission (8% on the first $1,500 of a sale in most collectible categories, 0% above $1,500 under the current promotional tier, with reduced rates for coins and electronics) plus the 2.9% + $0.30 processing fee (charged on total order value, including buyer-paid shipping and tax) typically total around 11% on ordinary orders - but materially less on high-value cards that clear $1,500. On $50,000 in gross sales, platform fees are fully deductible under IRC Section 162(a) and can easily run $5,000+. Do not estimate: download your Annual Seller Statement from Whatnot's Financials section for the exact figures and report them on Schedule C, Line 10 (Commissions and fees).

NJ-Specific Tax Rules for Collectible Sellers

New Jersey adds its own layer of complexity for Whatnot sellers. Here is what NJ does differently from the federal system.

NJ Sales Tax on Collectibles: 6.625%

NJ imposes a 6.625% sales tax on all tangible personal property, including sports cards, trading cards, comics, sneakers, coins, and other collectibles. There is no exemption for collectibles in NJ. Notably, clothing is exempt from NJ sales tax under N.J.S.A. 54:32B-8.4 - so sneaker sellers pay sales tax on sneakers classified as athletic equipment but not on most apparel items.

On Whatnot, this is handled for you. As a marketplace facilitator, Whatnot collects and remits NJ sales tax on all applicable transactions. You do not need to separately collect or remit sales tax on Whatnot sales.

At card shows, you are fully responsible. No marketplace facilitator exists at in-person events. NJ requires all vendors to register via Form NJ-REG at least 15 business days before the event, obtain a Certificate of Authority (Form CA-1), and collect the 6.625% sales tax on all tangible personal property sales. There is no temporary vendor permit in NJ - full registration is required even for one-time events. NJ Division of Taxation personnel can make on-site jeopardy assessments at card shows.

The NJ Resale Certificate (Form ST-3) allows you to buy inventory for resale without paying the 6.625% sales tax at purchase. This covers sealed product, individual cards, and supplies purchased exclusively for resale. Present Form ST-3 to any NJ vendor or wholesaler when purchasing inventory. Retain certificates for 4 years. See my NJ sales tax guide for detailed coverage.

NJ Gross Income Tax

NJ taxes all income - including self-employment income from Whatnot sales - at ordinary rates ranging from 1.4% to 10.75%. There is no preferential capital gains rate at the state level, meaning both short-term and long-term collectible gains are taxed identically by NJ. NJ also does not allow capital loss carryovers and does not permit the $3,000 offset of capital losses against ordinary income.

Three critical differences from federal treatment:

NJ does not allow the QBI deduction. The 20% deduction under IRC Section 199A is federal only. Your NJ taxable income will always be higher than your federal taxable income for the same business activity.

NJ does not allow the 50% SE tax deduction. The IRC Section 164(f) deduction reduces federal AGI but does not carry to the NJ return.

NJ has no state-level self-employment tax. Schedule SE is federal; its regular Social Security and Medicare components are computed after the 92.35% adjustment and applicable wage-base rules. NJ separately taxes business net profits through the Gross Income Tax at rates up to 10.75%.

NJ estimated tax payments are required when estimated liability after withholding and credits is more than $400 - lower than the federal $1,000 boundary. Quarterly dates mirror federal (April 15, June 15, September 15, January 15). The safe harbor requires payment of at least 80% of current year liability or 100% of prior year liability (110% if gross income exceeds $150,000). NJ's extension trap is severe: if you file Form NJ-630 but pay less than 80% by April 15, NJ retroactively denies the extension and assesses both late-filing penalties (5% per month, up to 25%) and late-payment penalties.

NJ Worker Classification (ABC Test)

If you hire helpers for card shows, shipping, or stream production, NJ uses the ABC test - one of the strictest worker classification standards in the nation. All three prongs must be satisfied to classify a worker as an independent contractor. Prong B (service performed outside the employer's usual course of business) is particularly problematic: a helper assisting with card sales, shipping, or break preparation is performing work within the usual course of your business, likely triggering employee classification under Hargrove v. Sleepy's (220 N.J. 289, 2015).

Every Deduction You Can Claim as a Whatnot Seller

All expenses must be ordinary and necessary for the trade or business under IRC Section 162(a). Here is the complete list for Whatnot sellers:

Cost of Goods Sold (Schedule C Part III): All inventory purchased for resale - sealed product, individual cards, bulk lots, comics, sneakers. Inbound shipping costs to acquire inventory are includable in COGS.

Platform fees (Schedule C, Line 10): Whatnot commissions (8%), processing fees (2.9% + $0.30), eBay Final Value Fees, Mercari selling fees, and all other marketplace commissions.

Shipping costs and materials (Schedule C, Line 22 or 27a): Boxes, bubble mailers, poly bags, tape, shipping labels, printer ink, postage, insurance on shipped packages.

Grading and authentication fees (Schedule C expense or capitalized to COGS): PSA, BGS, CGC, SGC submission fees. Expense in the year paid if the card is sold the same year; capitalize if the card remains in inventory.

Card protection supplies (Schedule C, Line 22): Penny sleeves, toploaders, magnetic one-touch cases, Card Saver holders. If included with sold items, may be categorized as part of COGS or shipping materials.

Streaming equipment (IRC Section 179 or Section 168): Cameras, ring lights, tripods, card display stands, microphones, green screens. Section 179 allows immediate expensing up to $2,560,000 for 2026 ($2,500,000 for 2025, as increased by OBBBA). 100% bonus depreciation was permanently restored by OBBBA for property acquired (or under binding contract) after January 19, 2025.

Card show expenses (Schedule C, various lines): Booth and table fees (fully deductible), travel mileage (72.5 cents/mile Jan-Jun 2026; 76 cents/mile Jul-Dec 2026), hotel for overnight business travel, and meals with clients or dealers (50% deductible under IRC Section 274(k) with proper substantiation).

Home office (IRC Section 280A): A dedicated shipping, inventory storage, or streaming room qualifies. Simplified method: $5/sq ft up to 300 sq ft ($1,500 max). Regular method (Form 8829): actual percentage of home expenses including rent or mortgage interest, property taxes, insurance, utilities, and depreciation.

Internet and phone (Schedule C, Line 25): Business-use percentage of monthly bills for streaming, listings, market research, and customer communication.

Subscriptions and software (Schedule C, Line 18 or 27a): Beckett Online, PSA memberships, eBay Store subscriptions, PirateShip, ShipStation, QuickBooks, inventory management tools, and any card pricing databases.

Insurance (Schedule C, Line 15): Business insurance covering inventory, shipping errors, and liability. Self-employed health insurance premiums are deductible above the line under IRC Section 162(l).

Professional fees (Schedule C, Line 17): CPA and tax preparation fees, legal fees for business operations. LLC formation costs may require amortization under IRC Section 195 ($5,000 immediate, remainder over 180 months) if incurred before business operations begin.

Vehicle expenses (Schedule C, Line 9 or 44a): Standard mileage method (72.5 cents/mile Jan-Jun 2026; 76 cents/mile Jul-Dec 2026) or actual expense method for trips to card shows, post office, supply stores, and inventory sourcing. Keep a contemporaneous mileage log.

Advertising and marketing (Schedule C, Line 8): Paid promotions, social media advertising, and any costs to grow your Whatnot following. For small business tax planning strategies that maximize these deductions, see the entity structure section below.

Entity Structure: Sole Prop to LLC to S-Corp

Sole Proprietorship (Default)

A sole proprietorship is the default federal classification when an individual carries on the business without another entity election. You report income on Schedule C (Form 1040), and no separate entity return is required. Entity choice depends on liability exposure and a full tax model, not a fixed profit band. An EIN from the IRS (free via Form SS-4 online) can keep your SSN off business W-9 forms.

Single-Member LLC

An LLC adds liability protection without changing your tax situation - it remains a disregarded entity filing Schedule C under Treas. Reg. Section 301.7701-3(b)(1)(ii). In NJ, formation costs $100 plus $75/year for the annual report. No publication requirement (unlike New York).

LLC formation is a state-law and liability decision for an attorney or formation provider, not a revenue trigger. Monaco CPA does not form entities, obtain EINs, register DBAs, provide registered-agent services, open bank accounts, or give legal advice. The NJ LLC guide is general education; after an entity exists, Monaco CPA can analyze its federal and NJ tax classification under a separately accepted written scope.

S-Corp Election

An S-Corporation election (IRC Section 1362, Form 2553) splits income into W-2 salary (subject to FICA) and K-1 distributions (not subject to FICA). The S-Corp's tax advantage comes from this FICA avoidance on the distribution portion.

When it may make sense: Only after a full-return comparison. Model a defensible reasonable salary, both halves of payroll tax, the owner's other wages, QBI, retirement contributions, employer deductions, unemployment taxes, NJ taxes and BAIT if applicable, payroll and Form 1120-S costs, NJ minimum Corporation Business Tax, and administrative burden. No single profit range guarantees net savings. Use the S-Corp calculator to model your specific inputs.

The reasonable compensation requirement (IRS Fact Sheet 2008-25) prevents owners from paying unreasonably low salaries. David E. Watson, P.C. v. United States (668 F.3d 1008, 8th Cir. 2012) successfully challenged a $24,000 salary on $200,000+ in income. Set your salary based on what a comparable card business manager would earn.

NJ S-Corp recognition: P.L. 2022, c.133 generally eliminated the old separate CBT-2553 for qualifying federal approval/effective dates and privilege periods, but recognition is not automatic from federal status alone. Confirm DORES registration as an 1120 filer, federal approval proof, Shareholder Jurisdictional Consent, and timely CBT-100S filing. Formation date is not the test; earlier privilege periods may require retroactive-election review.

The QBI interaction can favor or disfavor an S-Corp depending on the full return. Section 199A is permanent, and collectible reselling generally is not an SSTB. At higher income, W-2 wages may support the wage limitation, while reasonable compensation is excluded from QBI and the K-1 business-income base remains subject to the taxable-income ceiling and other limits.

NJ BAIT election: The Business Alternative Income Tax allows pass-through entities (including S-Corps) to pay NJ income tax at the entity level, making it deductible on the federal return and bypassing the individual SALT cap (now $40,000 for 2025 and $40,400 for 2026 under OBBBA). BAIT rates start at 5.675% on the first $250,000. Single-member LLCs are ineligible - only S-Corps and partnerships qualify.

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Whatnot seller taxes involve 1099-K reconciliation, COGS tracking for collectibles, grading-fee capitalization, and NJ sales-tax rules. I'm Greg Monaco, a NJ-licensed CPA. Greg is the sole practitioner and personally reviews, approves, and signs all client-facing work.

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Circular 230 Disclosure: This post provides general tax information and is not a substitute for personalized tax advice. Consult a qualified tax professional for advice specific to your situation.

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Circular 230 Disclosure: This content is for informational purposes only and does not constitute tax advice. Written tax advice from a Circular 230 practitioner is governed by 31 C.F.R. §10.37; Treasury’s 2014 final regulations eliminated the former “covered opinion” rules and their mandatory disclaimer legend, so no such legend appears here. Tax laws change frequently; consult a licensed CPA about your specific facts.