New Jersey income tax applies to residents and to anyone earning money from New Jersey sources, with graduated rates running from 1.4% on the lowest earnings up to 10.75% on taxable income above $1 million. The state runs its own system with its own definitions, so your New Jersey taxable income will not always match what you report federally. The differences matter most for retirement contributions, health savings accounts, and a handful of items the state exempts entirely.
Who Has to File
Filing turns on two things: your residency status and how much you made.
Full-year residents maintain a permanent home in New Jersey for the entire calendar year. Part-year residents moved into or out of the state during the year. Statutory residents are people who maintained a permanent home in New Jersey all year and spent more than 183 days in the state, even if they consider themselves residents elsewhere. That 183-day rule catches people who assume their driver’s license or voter registration settles the question.
You must file a New Jersey return if your gross income exceeds:
- $10,000 if you’re single, married filing separately, or an estate or trust
- $20,000 if you’re married filing jointly, head of household, or a qualifying surviving spouse
Nonresidents must file if their income from New Jersey sources crosses those same dollar amounts.1New Jersey Legislature. Senate No. 2027 Part-year residents often file two returns: an NJ-1040 for the time they lived in the state and an NJ-1040NR for any New Jersey-source income earned during the nonresident portion.2New Jersey Division of Taxation. 2025 Form NJ-1040NR
The Rates
New Jersey uses a graduated structure. The lowest bracket starts at 1.4% and the top bracket reaches 10.75% on taxable income above $1 million.3State of New Jersey. NJ Division of Taxation – NJ Income Tax Rates Those rates apply to your New Jersey gross income after personal exemptions and allowable deductions, not to your federal adjusted gross income. If your taxable income is under $100,000, the Division of Taxation publishes tax tables that give you the exact liability without a bracket calculation. Higher earners work through the rate schedules.
Where New Jersey Income Diverges From Federal
This is where most filing mistakes happen. Your W-2 may show different wages for state and federal purposes, and several accounts you treat as pre-tax federally are fully taxable in New Jersey.
403(b) Plans Are Taxable
Traditional 401(k) contributions generally get the same pre-tax treatment in New Jersey as they do federally. Contributions to 403(b) plans — the retirement accounts common at schools, hospitals, and nonprofits — are typically taxable for New Jersey purposes even though they’re pre-tax federally. Employees with 403(b) plans will see higher state taxable wages than federal taxable wages on their W-2. Traditional IRA contributions are also not deductible on your New Jersey return, even when you qualified for the deduction federally.
Health Savings Accounts Are Not Tax-Advantaged in New Jersey
Both your own HSA contributions and any employer contributions count as taxable income for state purposes. Employee contributions are not deductible on the state return. One partial offset: withdrawals used for qualified medical expenses can be claimed as medical expenses on your New Jersey return.
Income the State Does Not Tax
Social Security benefits are completely exempt from New Jersey income tax, as is unemployment compensation. Military pay earned in a combat zone and certain death benefits are excluded. Pension and retirement income may qualify for an exclusion if you’re 62 or older (or disabled) and your total income falls below the published thresholds. The exclusion amounts have been rising, so check the current NJ-1040 instructions for the figures that apply to your tax year.
Credits and Deductions
Personal Exemptions
You can claim personal exemptions for yourself, your spouse (if filing jointly), and your dependents, with additional exemptions if you’re 65 or older or legally blind. These are fixed dollar amounts that reduce taxable income directly.
Property Tax Deduction or Credit
Homeowners and renters can either deduct property taxes paid (up to a statutory cap) or claim a property tax credit, whichever is larger. Renters calculate the deduction from a portion of rent allocated as property tax; keep your tax bills or your landlord’s statement.
Child and Dependent Care Credit
If you paid for care for a child under 13 or a disabled dependent so you could work, and you qualify for the federal child and dependent care credit, you may claim the New Jersey version. Your New Jersey taxable income must be $150,000 or less. The state credit is a percentage of your federal credit based on income:
- $30,000 or less: 50% of the federal credit
- $30,001 to $60,000: 40%
- $60,001 to $90,000: 30%
- $90,001 to $120,000: 20%
- $120,001 to $150,000: 10%
The credit is refundable, so if it exceeds your tax, you get the difference back.4State of New Jersey. Child and Dependent Care Credit
Credit for Taxes Paid to Other States
If you’re a New Jersey resident who earned income in another state and paid income tax there, Schedule NJ-COJ lets you claim a credit so the same earnings aren’t taxed twice.5State of New Jersey Department of the Treasury. NJ-1040 Resident Return Instructions The credit is capped at the lesser of the tax actually paid to the other state or the New Jersey tax attributable to that income, so a lower rate elsewhere won’t close the gap entirely.
New Jersey and Pennsylvania have a reciprocal agreement for wages and salaries: your home state taxes them, the work state does not. New Jersey residents working in Pennsylvania should file Form REV-419 with their employer so Pennsylvania tax isn’t withheld. The reciprocal agreement does not cover Philadelphia’s local wage tax, so a New Jersey resident working in Philadelphia still owes that city tax on top of New Jersey state tax.
Property Tax Relief Programs Are Separate
Beyond the deduction or credit you claim on your NJ-1040, the state runs two property tax relief programs that are applied for separately. Filing your income tax return does not enroll you.
ANCHOR provides direct relief to homeowners with gross income up to $250,000 and renters with gross income up to $150,000, if they owned and occupied their home or rented their principal residence as of October 1 of the applicable year. Benefit amounts are set by the state budget. The current application deadline is November 2, 2026.6NJ Division of Taxation. Property Tax Relief Programs FAQs
Senior Freeze reimburses eligible seniors and disabled residents for property tax increases. Age, residency, and income requirements are published each year. The filing deadline for the 2025 program year is also November 2, 2026.7New Jersey Division of Taxation. Senior Freeze (Property Tax Reimbursement)
Estimated Payments and Penalties
If you have income that isn’t subject to withholding — self-employment, rental income, investment gains — you probably owe quarterly estimated payments. The trigger is simple: if you expect to owe more than $400 in New Jersey tax after withholding and credits, estimated payments are required.8State of New Jersey. Form NJ-1040-ES Estimated Tax Payments
To avoid an underpayment penalty, pay at least 80% of your current-year liability through withholding and estimated payments combined, or base your payments on 100% of your prior-year tax. If your prior-year gross income exceeded $150,000, that safe harbor rises to 110% of the prior year’s tax. Falling short triggers an interest-based penalty calculated separately for each quarter you underpaid.
Late consequences stack. A 5% late payment penalty applies to any unpaid balance after the filing deadline. A late filing penalty of 5% per month, up to 25%, applies if you don’t file on time. Both can run at once.
How and When to File
Full-year residents file Form NJ-1040. Nonresidents file Form NJ-1040NR. Part-year residents may need both.9New Jersey Division of Taxation. 2025 Income Tax Forms Before you start, pull together your W-2s, 1099s for interest, dividends, and contractor payments, property tax bills or a landlord’s certificate of rent paid, and documentation for any credits you plan to claim. If you moved in or out of New Jersey, have your exact dates ready.
New Jersey returns are due when your federal return is due. For calendar-year filers, that’s April 15, 2026.10Division of Taxation. When to File and Pay If the date falls on a weekend or holiday, the deadline moves to the next business day.
A six-month extension to October 15 is available by filing Form NJ-630 or requesting one through the Division of Taxation’s online portal. The catch: you must pay at least 80% of your total tax liability by the original April deadline for the extension to be valid. Fall short, and the extension is retroactively denied; late filing and late payment penalties then run from the original due date.11NJ Division of Taxation. When to File and Pay
Electronic filing through NJ e-File or NJ WebFile is the fastest route. Save your confirmation number as proof of timely filing. You can check your return’s status and any expected refund through the Division of Taxation’s online inquiry system.