Yes. Traditional pre-tax contributions to a 403(b) do reduce your taxable income, dollar for dollar, up to $24,500 in 2026. The money comes out of your paycheck before federal income tax is calculated, so the wages reported in Box 1 of your W-2 are lower than what you actually earned.1Internal Revenue Service. Retirement Plans FAQs Regarding 403(b) Tax-Sheltered Annuity Plans Roth 403(b) contributions, if your plan offers them, do not.
How the Reduction Works on Your Paycheck
When you enroll in a traditional 403(b), you sign a salary reduction agreement telling your employer to route part of each paycheck into the plan before withholding federal income tax. The deferral lowers the wage figure your employer reports to the IRS. You pay federal income tax only on the reduced amount.1Internal Revenue Service. Retirement Plans FAQs Regarding 403(b) Tax-Sheltered Annuity Plans Most states follow the same treatment, though a few handle it differently for state income tax purposes.
The math is direct. Earn $65,000 and defer $10,000 into a traditional 403(b), and your federal taxable wages drop to $55,000. The money in the account then grows tax-deferred until you withdraw it. You are not eliminating tax on that $10,000; you are postponing it to a year when your bracket may be lower.
What the Reduction Does Not Cover
The pre-tax break applies to federal income tax withholding, not to payroll taxes. Your employer calculates Social Security and Medicare taxes on your full gross pay before subtracting the 403(b) deferral, so every dollar you earn still counts for FICA.2Internal Revenue Service. Retirement Plan FAQs Regarding Contributions – Are Retirement Plan Contributions Subject to Withholding for FICA, Medicare or Federal Income Tax That is 6.2% for Social Security (up to the annual wage cap) and 1.45% for Medicare with no upper limit. One upside: your future Social Security benefit is calculated on those unreduced earnings.
How Much You Can Defer in 2026
The maximum salary you can defer into a 403(b) in 2026 is $24,500.3Internal Revenue Service. Retirement Topics – 403(b) Contribution Limits That cap covers your total elective deferrals across all 403(b), 401(k), and SIMPLE IRA plans combined. If you contribute through more than one employer, you have to track the aggregate yourself. A separate ceiling limits the combined total of your deferrals plus any employer contributions to $72,000 in 2026.4Internal Revenue Service. Notice 2025-67, 2026 Amounts Relating to Retirement Plans and IRAs
Catch-Up Contributions After Age 50
Turn 50 or older by the end of 2026 and you can contribute an additional $8,000 above the base limit, bringing your maximum deferral to $32,500.3Internal Revenue Service. Retirement Topics – 403(b) Contribution Limits Every extra dollar deferred through the catch-up reduces your taxable income by the same amount.
A higher catch-up is available to participants who are 60, 61, 62, or 63 during the calendar year. For 2026, that enhanced amount is $11,250 and replaces the standard $8,000 catch-up for those specific ages.3Internal Revenue Service. Retirement Topics – 403(b) Contribution Limits A 62-year-old in 2026 could defer up to $35,750 ($24,500 plus $11,250).
The 15-Year Service Catch-Up
If you have worked for the same qualifying employer for at least 15 years, your plan may let you contribute up to $3,000 per year above the normal deferral limit. Qualifying employers include educational institutions, hospitals, health and welfare agencies, and churches. The lifetime ceiling on this provision is $15,000, and the calculation compares your career-average deferrals against $5,000 per year of service. Not every plan offers it. When both apply, the 15-year catch-up is typically used before the age-50 catch-up.5Internal Revenue Service. 403(b) Plans – Catch-Up Contributions
Roth 403(b): Same Account, No Reduction
If your plan offers a Roth option, those contributions go in after tax. Your employer includes the Roth deferral in your W-2 Box 1 wages, so there is no upfront reduction in taxable income.6Office of the Law Revision Counsel. 26 USC 402A – Optional Treatment of Elective Deferrals as Roth Contributions You pay full tax now in exchange for tax-free withdrawals later, including tax-free growth, if the distribution is qualified.
The Roth choice tends to favor workers earlier in their careers who expect their income and tax rate to rise. Someone already in a high bracket and closer to retirement usually gets more out of the traditional pre-tax route. Either way, the $24,500 deferral limit applies to your combined traditional and Roth contributions, and the plan keeps them in separate accounts.6Office of the Law Revision Counsel. 26 USC 402A – Optional Treatment of Elective Deferrals as Roth Contributions
Under the SECURE 2.0 Act, employers may also designate their matching or nonelective contributions as Roth. Those Roth employer contributions are not subject to income tax withholding or FICA when allocated to your account, but they are reported as taxable income on a Form 1099-R for the year.7Internal Revenue Service. SECURE 2.0 Act Changes Affect How Businesses Complete Forms W-2 Not all plans have adopted the feature.
Employer Contributions Don’t Add to Your Taxable Wages
When your employer contributes to your 403(b), whether as a match or a flat contribution, that money goes in tax-free to you. Federal law excludes employer contributions from your gross income for the year, so they do not appear in your W-2 wages and do not increase your tax bill.8Office of the Law Revision Counsel. 26 USC 403 – Taxation of Employee Annuities The exclusion is automatic through payroll. Those funds get taxed when you withdraw them in retirement.
The Saver’s Credit Can Reduce Tax Further
Contributing to a 403(b) can also qualify you for a separate credit that reduces your tax bill directly. The Retirement Savings Contributions Credit, commonly called the Saver’s Credit, is a nonrefundable credit worth up to 50% of the first $2,000 you contribute. The maximum is $1,000 per person, or $2,000 on a joint return.9Office of the Law Revision Counsel. 26 USC 25B – Elective Deferrals and IRA Contributions by Certain Individuals
The credit percentage depends on your adjusted gross income and filing status. For 2026, it disappears once AGI exceeds $80,500 for joint filers, $60,375 for head of household, or $40,250 for single filers.10Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Below those thresholds, the rate steps down from 50% to 20% to 10% as income rises. Because it is nonrefundable, the credit can only reduce your tax liability to zero. Claim it on Form 8880.
The Tax You Save Now Comes Due Later
The reduction in taxable income from a traditional 403(b) is a deferral, not forgiveness. Distributions in retirement count as ordinary income in the year you receive them, taxed at your regular federal rate.1Internal Revenue Service. Retirement Plans FAQs Regarding 403(b) Tax-Sheltered Annuity Plans That covers both your original pre-tax contributions and all the investment growth. Qualified Roth 403(b) distributions come out tax-free.
Take money out before age 59½ and you generally owe a 10% early distribution penalty on top of ordinary income tax.11Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions Several exceptions can waive the penalty:
- Leaving your job during or after the year you turn 55 makes distributions from that employer’s plan penalty-free. Public safety employees of state or local governments qualify at 50.
- Total and permanent disability removes the penalty.
- A series of substantially equal periodic payments taken over your life expectancy avoids the penalty, provided you continue them for at least five years or until you reach 59½, whichever is later.
Hardship withdrawals, where a plan allows them, remain fully taxable and can still trigger the 10% penalty unless one of the exceptions applies.12Internal Revenue Service. Hardships, Early Withdrawals and Loans Unlike a plan loan, a hardship withdrawal is not repaid.
You cannot defer indefinitely either. Traditional 403(b) balances are subject to required minimum distributions starting at age 73, though you can delay while you continue working for the sponsoring employer if you own less than 5% of the organization.13Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs The starting age moves to 75 in 2033.