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 and a different phase-out threshold. 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 allow bonus depreciation at all. If you claim bonus depreciation federally, you must add the entire amount back on your NJ return and recompute depreciation under regular MACRS without the bonus, over the asset's normal recovery period.
What this means for you: A $100,000 asset that's fully expensed on your federal return might only give you a first-year NJ deduction of about $14,290 (regular MACRS, 14.29% Year-1 for 7-year property). 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: Long-term capital gains (assets held over one year) get preferential rates of 0%, 15%, or 20% depending on income. 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: Health Savings Account contributions are deductible. For 2026, the limits are $4,400 for individual coverage and $8,750 for family coverage (Rev. Proc. 2025-19). Contributions grow tax-free, and withdrawals for qualified medical expenses are tax-free.
NJ: New Jersey does not recognize HSA tax benefits. Contributions are taxable income for NJ purposes. Earnings inside the HSA are also taxable by NJ. Withdrawals for medical expenses are not taxed (since the contributions were already taxed going in).
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: Business meals are 50% deductible when directly related to business and not lavish or extravagant. The temporary 100% deduction from 2021-2022 is long gone.
NJ: Under the firm's position based on NJ Division of Taxation Technical Bulletin TB-37, S corporations, partnerships, and sole proprietors use the NJ-BUS subtraction framing for the federally disallowed remaining 50% of qualifying business meals. 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 is higher than federal - a favorable NJ adjustment that reduces 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 (increased from $10,000 under OBBBA, with phase-down above $505,000 MAGI for 2026). 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. Pass-through entities (LLCs, S-Corps, partnerships) 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 individual owners, 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 (announced May 18, 2026), 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: Self-employed individuals pay 15.3% regular SE tax (12.4% Social Security on the first $184,500 of earnings for 2026, plus 2.9% Medicare on all earnings). Form 8959 separately applies the 0.9% Additional Medicare Tax when combined Medicare wages and self-employment income exceed the filing-status threshold; Medicare wages reduce the threshold applied to 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 elective coverage can change the result.
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) additionally tiers the allowable alternative business calculation adjustment by gross income: 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 penalty rate is approximately 10% (compounded annually), which is higher than the federal rate and makes timely quarterly payments even more important. Under the firm's TB-37 position, eligible NJ S corporations, partnerships, and sole proprietors use the NJ-BUS subtraction framing for the federally disallowed remaining 50% of qualifying business meals; NJ C corporations make no adjustment and retain 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 (complete NJ disallowance), 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?
No. NJ does not allow bonus depreciation at all. If you claim 100% bonus depreciation federally under the OBBBA, you must add the entire amount back on your NJ return and recompute depreciation under regular MACRS without the bonus, over the asset's normal recovery period.
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, and earnings inside the HSA are also taxable by NJ. This creates a gap between your federal AGI and NJ gross income every year if you contribute to an HSA.
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