No, 403(b) contributions are not tax deductible in NJ. New Jersey’s Gross Income Tax Act treats your elective deferrals to a 403(b) plan as fully taxable wages in the year you earn them, even though the federal government lets you defer tax on that same money until retirement. The state does allow an exclusion for 401(k) contributions, but it does not extend that exclusion to 403(b) plans. The upside is that because you pay New Jersey tax on these contributions now, you recover that money tax-free when you take distributions later.
Why New Jersey Taxes 403(b) Contributions
The rule comes down to one statute. N.J.S.A. 54A:6-21 excludes from gross income amounts contributed to a qualified cash or deferred arrangement under Section 401(k) of the Internal Revenue Code.1Justia Law. Silvester and Yongjie Tuohy vs. Director, Division of Taxation The statute names 401(k) plans and only 401(k) plans. Because 403(b) plans operate under a different section of the Internal Revenue Code, they fall outside the exclusion.
The New Jersey Division of Taxation has said so directly: the Gross Income Tax Act “does not have a provision deferring the tax on contributions made by an employer or employee to a §403(b) plan.”2State of New Jersey – Department of the Treasury – Division of Taxation. Treatment of Employer Post-Retirement Contributions to a Section 403(b) Plan The state’s wages guidance echoes it: “New Jersey does not allow you to exclude from wages amounts you contribute to deferred compensation and retirement plans, other than 401(k) Plans,” and lists 403(b) plans by name as plans that don’t qualify.3New Jersey Department of the Treasury. New Jersey Division of Taxation – Wages This is a deliberate choice by the legislature, not an oversight.
If you work in a public school, hospital, or nonprofit and defer part of your salary into a 403(b), that deferred money is taxed at the state’s graduated rates, which run from 1.4% on the first $20,000 of taxable income up to 10.75% on income above $1 million.4State of New Jersey Department of the Treasury. New Jersey Tax Rate Schedules
Employer Contributions Are Also Taxed
This part surprises most 403(b) participants. New Jersey taxes both your contributions and your employer’s contributions at the time they’re made. The Division of Taxation draws no line between the two: “These contributions are taxable in the year they are made and are subject to withholding like any other wage or remuneration paid an employee.”2State of New Jersey – Department of the Treasury – Division of Taxation. Treatment of Employer Post-Retirement Contributions to a Section 403(b) Plan
That diverges sharply from the federal rule, where employer contributions to a 403(b) are generally excluded from your taxable income until withdrawal. In New Jersey, by the time you retire, every dollar that went into your 403(b) through salary deferral or employer contribution has already been taxed by the state. Only the investment earnings remain untouched.
What This Means on Your W-2 and NJ-1040
The disconnect between federal and state treatment shows up on your W-2. Box 1 shows federal taxable wages, reduced by your 403(b) deferrals. Box 16 shows wages subject to New Jersey tax, which should be higher because those deferrals are added back in.5New Jersey Division of Taxation. Common Filing Mistakes The Division of Taxation flags this as one of the most common filing errors: taxpayers reporting the Box 1 figure on their NJ-1040 instead of Box 16.
When you fill out your NJ-1040, use Box 16 for your wage income. Confirm that “NJ” or “New Jersey” appears in the state identification box.3New Jersey Department of the Treasury. New Jersey Division of Taxation – Wages If your employer failed to add your 403(b) deferrals back into Box 16, you’re responsible for correcting the amount yourself. Your deferral figure appears in Box 12, usually with Code E.
Save every W-2 that shows a 403(b) contribution. Those forms document your contribution basis, the amount New Jersey has already taxed. Without them, you risk paying state tax on the same dollars twice when you start taking distributions.
How You Get the Money Back in Retirement
Paying New Jersey tax on your contributions upfront creates a basis. When you later withdraw from your 403(b), the portion of each distribution that represents those previously taxed contributions comes out free of New Jersey tax. Only the investment earnings are taxable at the state level.2State of New Jersey – Department of the Treasury – Division of Taxation. Treatment of Employer Post-Retirement Contributions to a Section 403(b) Plan Because the state taxed employer contributions as well, your basis includes everything that went into the account from both sides, often a large share of the balance.
New Jersey uses one of two methods to calculate the taxable portion of each payment. The Three-Year Rule applies if you’ll recover your full basis within 36 months of your first distribution; until you do, payments are tax-free, and after that they’re fully taxable. If recovery will take longer, the General Rule applies, and a fixed percentage of each payment is tax-free for life. Getting the fraction right under the General Rule depends on knowing your exact total contributions, which is why those old W-2s matter.
The Retirement Income Exclusion
On top of basis recovery, New Jersey offers a separate exclusion for retirees. If you’re 62 or older or qualify as disabled under Social Security rules, and your total income for the year is $150,000 or less, you can exclude a portion of your pension and retirement account income from state tax.6New Jersey Division of Taxation. Retirement Income Exclusions The maximum exclusion depends on your income and filing status:
- Total income of $100,000 or less: up to $100,000 for married filing jointly, $75,000 for single or head of household, $50,000 for married filing separately.
- Total income of $100,001 to $125,000: 50% of the full amount for joint filers, 37.5% for single filers, 25% for married filing separately.
- Total income of $125,001 to $150,000: 25% for joint filers, 18.75% for single filers, 12.5% for married filing separately.
- Total income above $150,000: no exclusion.
The exclusion applies only to the taxable portion of your 403(b) distributions, meaning the investment earnings. Between basis recovery and this exclusion, many New Jersey retirees with moderate incomes owe little or no state tax on their 403(b) withdrawals.6New Jersey Division of Taxation. Retirement Income Exclusions
Roth 403(b) Contributions
Roth 403(b) contributions are made with after-tax dollars at both the federal and state level, so the question of state deductibility doesn’t change: there’s nothing to deduct. At the federal level, qualified Roth distributions are tax-free if you’ve held the account for at least five tax years and are 59½ or older, disabled, or the distribution is made after death.7Internal Revenue Service. Designated Roth Accounts Under a 401(k), 403(b) or Governmental 457(b) Plan
New Jersey has published clear guidance on Roth IRAs, which produce tax-free qualified distributions at the state level, but it has been less explicit about Roth 403(b) accounts specifically. If you have a significant Roth 403(b) balance, confirm the state treatment with a tax professional before you start taking distributions.