In This Article
- Section 179 Expensing
- Bonus Depreciation
- QBI Deduction (Section 199A)
- Capital Gains
- HSA Contributions
- Business Meals
- SALT Cap and the BAIT Workaround
- Estimated Tax Safe Harbor
- Underpayment Penalty Rates
- Self-Employment Tax
- Capital Loss Carryforward
- Federal NOLs and New Jersey's Alternative Business Calculation
- OBBBA Changes and NJ-Specific Details
- The Bottom Line
- Frequently Asked Questions
Federal and New Jersey returns can apply different rules to the same records. The following sections identify selected differences for education; their effect depends on the complete federal and state returns, and no dollar result is predicted.
1. Section 179 Expensing
Federal: The IRS allows you to expense up to $2,560,000 in qualifying asset purchases for 2026, with a phase-out starting at $4,090,000 (Rev. Proc. 2025-32).
NJ: New Jersey allows Section 179, but with a much lower cap of $25,000; current GIT-DEP applies the federal reduced-dollar limitation using that $25,000 maximum, with no business-income limitation and no carryforward of unused New Jersey deductions. Any amount you expense above $25,000 federally must be added back to NJ income, then depreciated over the asset's life on a separate NJ depreciation schedule.
What this means for you: If you buy a $200,000 piece of equipment and expense it federally, the amount above the applicable NJ current-expensing limit follows the NJ depreciation rules. Maintain separate federal and NJ schedules. For more detail, see my Section 179 and bonus depreciation post.
2. Bonus Depreciation
Federal: The One Big Beautiful Bill Act (OBBBA) made 100% bonus depreciation permanent for qualifying property acquired after January 19, 2025 and placed in service after that date. Property acquired on or before January 19, 2025 remains on the prior phase-down: generally 40% if placed in service in 2025, 20% in 2026, and 0% thereafter. Only qualifying post-January 19 acquisitions can receive the full 100% deduction in year one, subject to the other eligibility rules.
NJ: New Jersey does not follow current federal bonus depreciation. Recompute depreciation under GIT-DEP, including the applicable addback, recovery rules, and any legacy special-allowance exception.
What this means for you: A $100,000 asset (7-year property, half-year convention, 100% business use) that's fully written off with federal bonus depreciation might only give you a first-year NJ deduction of about $14,290 (regular MACRS, 14.29% Year-1). If the federal write-off was a Section 179 election instead, NJ allows up to $25,000 of Section 179 plus regular MACRS on the remaining $75,000, about $35,718 in the first year (GIT-DEP). A different convention, business-use percentage or election limit changes these figures. The cash flow impact is real. Plan NJ estimated taxes accordingly.
3. QBI Deduction (Section 199A)
Federal: Eligible pass-through business owners (sole props, LLCs, S-Corps, partnerships) can deduct up to 20% of QBI after allocable deductions. The taxable-income ceiling and, when applicable, SSTB and wage/property limits can reduce the deduction - and, for an SSTB owner above the phase-out range, eliminate it. For 2026 and later, IRC Section 199A(i) (added by OBBBA Section 70105) also sets a minimum $400 deduction for a taxpayer with at least $1,000 of aggregate QBI from active trades or businesses in which the taxpayer materially participates, with both amounts inflation-adjusted after 2026.
NJ: New Jersey has no equivalent of the QBI deduction. Zero. Your full business income is subject to NJ Gross Income Tax with no 20% reduction.
What this means for you: Your effective NJ tax rate on pass-through income is higher than you might expect if you're only looking at your federal return. Factor this into your quarterly estimated tax calculations.
4. Capital Gains
Federal: Most net long-term capital gains from capital assets held more than one year use the 0%, 15%, or 20% rate, depending on taxable income and filing status, but special categories can use maximum 25% or 28% rates; depreciation recapture and other character rules also require separate review. Short-term gains are taxed as ordinary income.
NJ: New Jersey taxes taxable net gains at ordinary-income rates regardless of holding period. The NJ rate goes up to 10.75% for income over $1 million, and there is no long-term vs. short-term distinction. What is taxable is a separate question from the rate: New Jersey basis, exempt-obligation rules, and the principal-residence exclusion ($250,000, or $500,000 for qualifying joint filers) can each reduce or eliminate the amount included, and within a category, same-year gains and losses are netted and the result cannot go below zero; New Jersey does not permit netting across categories or carrying a loss to another year.
What this means for you: Selling a business, investment property, or stock portfolio that qualifies for the 15% federal rate will still be taxed at your full NJ marginal rate. For more on this, see my Tax Resources.
5. HSA Contributions
Federal: Eligible individuals may deduct qualifying personal HSA contributions within the applicable limit; qualifying employer contributions, including cafeteria-plan salary reductions, are generally excluded from income and cannot also be deducted. For 2026, the base contribution limits are $4,400 for self-only coverage and $8,750 for family coverage (Rev. Proc. 2025-19), subject to coverage-month, catch-up, and other eligibility rules. Earnings held in the HSA are generally tax-free, and distributions used to pay or reimburse qualified medical expenses incurred after the HSA was established are tax-free. For calendar 2027, published HSA base limits are $4,500 self-only and $9,000 family under Rev. Proc. 2026-24; the applicable eligibility and contribution rules still apply.
NJ: New Jersey does not recognize HSA tax benefits. Contributions are taxable income for NJ purposes. Keep the account statements and Form 1099-SA, because the NJ treatment of the account's earnings and withdrawals depends on the facts.
What this means for you: If you're maxing out your HSA for the federal deduction, understand that NJ will tax those contributions. You'll see the difference between your federal AGI and NJ gross income every year.
6. Business Meals
Federal: Ordinary and necessary business meals are generally 50% deductible when you or your employee is present and the expense is not lavish or extravagant; the applicable business-purpose, substantiation, and exception rules still control. The temporary 100% deduction for qualifying restaurant meals applied to 2021–2022.
NJ: New Jersey lets sole proprietors deduct ordinary business meal and entertainment expenses not allowed on the federal return (Schedule NJ-BUS-1, Part I, item 4); partnerships take the same subtraction on Form NJ-1065, and S corporations enter the federally disallowed 50% of meals and 100% of entertainment on CBT-100S Schedule K, Part II, line 6d (Technical Bulletin TB-37(R)). NJ C corporations make no NJ adjustment and retain the federal 50% deduction.
What this means for you: If you operate as an S-corp, partnership, or sole proprietor, your NJ business meal deduction may be higher than federal: under the firm's reading of TB-37, a favorable NJ adjustment that can reduce your NJ taxable income relative to federal. If you operate as a NJ C-corp, the federal 50% limit also applies on your CBT-100; there is no NJ-specific bonus.
7. SALT Cap and the BAIT Workaround
Federal: The state and local tax (SALT) deduction is capped at $40,000 for 2025 and $40,400 for 2026 for individuals who itemize ($20,000 and $20,200 married filing separately), increased from $10,000 under OBBBA. For 2026 the cap phases down by 30% of MAGI above $505,000 (an effective 15% above $252,500 for MFS), but not below $10,000 ($5,000 MFS). The allowed amount depends on filing status, modified AGI, itemized state and local taxes, and the phase-down.
NJ: The Business Alternative Income Tax (BAIT) is NJ's workaround. Eligible pass-through entities (partnerships, NJ S corporations, and LLCs classified as partnerships or S corporations) that have at least one member liable for NJ Gross Income Tax on a share of distributive proceeds can elect to pay an entity-level tax that's deductible on the federal return, effectively bypassing the individual SALT cap ($40,000 for 2025, $40,400 for 2026 under OBBBA, increased from $10,000). The pass-through owners then claim the allocated credit on the prescribed return for each member type - NJ-1040 for resident individuals, NJ-1040NR for nonresident individuals, NJ-1041 for estates and trusts, CBT or partnership returns for entity members.
What this means: A BAIT election changes entity deductions and owner credits, but the full federal and NJ returns, QBI interaction, statutory base, allocation, timing, and compliance costs determine the result. No income threshold or dollar saving is promised. See the NJ BAIT election guide for educational mechanics.
8. Estimated Tax Safe Harbor
Federal: The required-annual-payment safe harbor generally uses the lesser of 90% of current-year tax or 100% of prior-year tax, increased to 110% when prior-year AGI exceeds $150,000 ($75,000 if married filing separately), subject to prior-return, installment, withholding, and exception rules.
NJ: Current Form NJ-2210 generally computes underpayment interest from the smaller of 80% of current-year tax or 100% of prior-year tax. N.J.S.A. 54A:9-6(d)(3) separately states a 110% high-income exception, but the Division says it imposes interest using the 100%-prior/80%-current calculation.
What this means for you: If your income is volatile, NJ's 80% current-year threshold is slightly more forgiving than federal's 90%. The prior-year methods, however, are NOT identical: the federal method steps up to 110% of prior-year tax at higher incomes, while current Form NJ-2210 computes interest from the smaller of 80% of current-year or 100% of prior-year tax even though the statute separately states a 110% high-income exception. Run both jurisdictions' calculations on their own forms.
9. Underpayment Penalty Rates
Federal: The IRS underpayment penalty rate is tied to the federal short-term rate and adjusts quarterly - 7% for Q1 2026, 6% for Q2 2026, back to 7% for Q3 2026 (Rev. Rul. 2026-10), and 7% for Q4 2026 (Rev. Rul. 2026-15, announced August 21, 2026). Check the current quarter's rate at IRS.gov before relying on a figure.
NJ: NJ's penalty rate is prime + 3%, approximately 10% for 2026 (per TB-21(R)). This is actually higher than the federal rate.
What this means for you: Do not import the federal computation into NJ. Apply current Form NJ-2210 to actual withholding, credits, installments, and payment dates. The Division publishes the annual NJ interest rate and states that its high-income statutory language does not replace the 100%-prior/80%-current interest computation.
10. Self-Employment Tax
Federal: Regular self-employment tax generally combines 12.4% Social Security tax and 2.9% Medicare tax on net earnings computed under Schedule SE. For 2026, the $184,500 Social Security wage base is shared with wages already subject to Social Security tax, so those wages reduce the base remaining for self-employment income; regular Medicare tax has no wage-base ceiling. The $400 net-earnings threshold and special coverage rules still apply. Form 8959 separately computes the 0.9% Additional Medicare Tax using the filing-status threshold and combined Medicare wages and self-employment income.
NJ: New Jersey has no separate self-employment tax. Self-employment income is subject to NJ Gross Income Tax at ordinary rates (1.4% to 10.75%). NJ unemployment, temporary disability, and family leave employee contributions generally apply to covered wages, not categorically to a sole proprietor's or independent contractor's self-employment income; worker classification and each program's coverage rules control. Any elective coverage must be established under the particular program's rules for the actual employer or worker class; it is not a general independent-contractor unemployment-insurance opt-in.
What this means for you: An S-Corp election changes federal payroll-tax mechanics but does not eliminate NJ income tax. Use the S-Corp Calculator only as a limited comparison, then complete a return-wide model; no net saving is promised.
11. Capital Loss Carryforward
Federal: After capital-loss netting, the ordinary-income offset is the smaller of the net loss or $3,000 ($1,500 if married filing separately); unused loss carries forward with its short- or long-term character preserved.
NJ: New Jersey allows no capital loss carryforward. Losses can only offset gains in the same tax year. If your losses exceed your gains, the excess disappears for NJ purposes.
What this means for you: A bad investment year followed by a good one creates a mismatch. Federally, you carry losses forward to offset future gains. In NJ, those losses are gone. Because NJ nets only within the same tax year, the year in which each gain and loss is realized changes the NJ result; whether and when to sell is an investment decision Monaco CPA does not make or recommend.
12. Federal NOLs and New Jersey's Alternative Business Calculation
Federal: A federal net operating loss is computed under the federal NOL rules; applicable post-2017 NOLs can carry forward indefinitely and generally are subject to an 80%-of-taxable-income limitation, with provision- and year-specific exceptions. The Section 199A QBI deduction is not an input that creates or enlarges the federal NOL.
NJ individual return: New Jersey does not provide a federal-style individual NOL deduction. Instead, the NJ-BUS-2 Alternative Business Calculation Adjustment can use losses and track specified unused losses for up to 20 years across the included business-related categories: net profits from business; rents, royalties, patents, and copyrights; partnership income; and S-corporation income. It is a limited adjustment among those categories, not a general NOL or a deduction against wages, interest, dividends, or other excluded income categories. For TY2026, P.L. 2026, c.22 (approved June 30, 2026, retroactive to taxable years beginning on or after January 1, 2026) sets the share of the business increment that may be subtracted by gross income (50% for every taxpayer in 2016-2025): 50% when gross income is $500,000 or less, 25% above $500,000 through $1,000,000, and 0% above $1,000,000. Check the TY2026 NJ-BUS-2 instructions when New Jersey publishes them.
What this means for you: Maintain the federal NOL schedule separately from any NJ-BUS-2 loss by category. Federal bonus-depreciation differences may affect the business-income records feeding the two systems, but neither bonus depreciation nor the federal Section 199A deduction should be described as mechanically setting a New Jersey 'NOL.' Apply the current NJ-1040 and NJ-BUS-2 instructions to the actual category and carryover year.
OBBBA Changes and NJ-Specific Details
The One Big Beautiful Bill Act (OBBBA) made the QBI deduction permanent (Section 70105) and restored 100% bonus depreciation for qualifying property acquired after January 19, 2025 (Section 70301); transition rules apply to earlier acquisitions. NJ does not conform to either provision, creating an ongoing two-system planning requirement for NJ business owners. NJ's estimated-tax underpayment interest is 10.00% for 2026 (prime plus 3%, charged only up to April 15 of the following year), which is higher than the federal rate and makes timely quarterly payments even more important. New Jersey lets a sole proprietor deduct ordinary business meal and entertainment expenses that were not allowed on the federal return (Schedule NJ-BUS-1, Part I, item 4); a partnership takes the same subtraction on Form NJ-1065, a New Jersey S corporation enters the federally disallowed 50% of meals and 100% of entertainment on CBT-100S Schedule K, Part II, line 6d (TB-37(R)), and a C corporation makes no NJ adjustment and retains the federal 50% deduction. The OBBBA also restored the federal mandatory Form 1099-K threshold for third-party-network (TPSO) transactions to more than $20,000 and more than 200 transactions (Section 70432); payment-card merchant acquirers have no federal de-minimis threshold, and a TPSO may furnish below its mandatory threshold. NJ-WT's $1,000-or-withholding rule is a separate payer state-copy filing duty, not a recipient-form threshold.
The Bottom Line
NJ and federal tax rules overlap in some areas and diverge in others. Selected differences include bonus depreciation (NJ does not follow current federal bonus depreciation and recomputes under GIT-DEP), the QBI deduction (no NJ equivalent), capital-gain treatment (no preferential NJ rate), and BAIT mechanics. Apply both systems to the taxpayer's actual transactions and complete returns.
If you're comparing entity structures and trying to figure out how these rules interact, my LLC vs. S-Corp comparison covers the entity-level decisions.
This article is for informational purposes only and does not constitute tax advice. Tax outcomes depend on your specific facts and circumstances.
Frequently Asked Questions
Does NJ allow bonus depreciation?
NJ does not follow the OBBBA's 100% federal bonus depreciation. Recompute the NJ amount under GIT-DEP; do not overlook a legacy special-allowance exception for older property.
Does NJ have a QBI deduction?
No. NJ has no equivalent of the federal Section 199A Qualified Business Income deduction. Your full business income is subject to NJ Gross Income Tax without the 20% reduction available on your federal return.
How does NJ tax capital gains?
NJ taxes taxable net gains at ordinary-income rates regardless of holding period. There is no preferential long-term rate. NJ rates go up to 10.75% on income over $1 million. New Jersey basis, exempt-obligation rules, and the principal-residence exclusion ($250,000, or $500,000 for qualifying joint filers) determine what is included in the first place. Within a category, same-year gains and losses are netted and the result cannot go below zero; New Jersey does not permit netting across categories or carrying a loss to another year.
What is the NJ BAIT election?
The Business Alternative Income Tax permits eligible pass-through entities to elect entity-level New Jersey tax. A qualifying entity payment generally may be deducted federally under Notice 2020-75, while eligible owners claim prescribed New Jersey credits. The combined effect depends on the BAIT base, allocation, owner returns, QBI, SALT-cap position, cash timing, credits, and compliance costs; no savings result is promised.
Does NJ recognize HSA contributions as deductible?
No. NJ does not recognize HSA tax benefits. Contributions are taxable income for NJ purposes, which creates a gap between your federal AGI and NJ gross income every year you contribute to an HSA.
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