Yes, a traditional 403(b) is pretax: your contributions come out of your paycheck before federal and state income tax is calculated, so the money you put in lowers your taxable income for that year. Most 403(b) plans also offer a Roth option, which flips the timing — you pay tax on the contribution now and take qualified withdrawals tax-free later. The 2026 elective deferral limit is $24,500 across both types combined, with extra room for older workers and long-tenured employees at qualifying employers.
How Pretax 403(b) Contributions Lower Your Tax Bill
When you elect a traditional (pretax) contribution, your employer diverts part of your salary into the retirement account before running income tax withholding. Earn $60,000, contribute $6,000, and your W-2 reports $54,000 in taxable wages. The full $6,000 goes into the account, and you owe no income tax on it until you withdraw it.1Office of the Law Revision Counsel. 26 USC 403 – Taxation of Employee Annuities
That deferral is the whole point. Contributions and any investment growth compound without being trimmed by annual taxes. You pay ordinary income tax on the money when distributions start, ideally in retirement, when your bracket may be lower than it is during your working years.
One catch worth knowing up front: pretax 403(b) contributions reduce federal and state income tax only. Social Security and Medicare (FICA) taxes are still withheld on your full salary, including the portion you defer. The paycheck savings you see are income tax savings, not payroll tax savings.
The Roth 403(b) Option
Many 403(b) plans now include a Roth account. Roth contributions go in after taxes. Your employer includes the amount in your gross income and withholds income tax on it, so you get no upfront tax break the year you contribute.2Office of the Law Revision Counsel. 26 USC 402A – Optional Treatment of Elective Deferrals as Roth Contributions
The payoff comes at withdrawal. Qualified distributions from a Roth 403(b), including all the investment growth, are entirely tax-free. To qualify, you must be at least 59½, and at least five tax years must have passed since your first Roth 403(b) contribution. If you expect to be in a higher bracket in retirement, or you just want a source of tax-free income later, Roth can beat the traditional break.
Traditional and Roth contributions share one annual deferral limit. You can split your paycheck contributions between the two, but the combined total for 2026 can’t exceed $24,500.3Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
Employer Matching Is Always Pretax
If your employer makes matching or nonelective contributions, those dollars are pretax even when your own contributions go into a Roth account. The employer money must be deposited into a separate pretax account inside the plan, and it doesn’t appear on your W-2 as current-year income.4Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts
When you eventually withdraw employer contributions and their earnings, you owe ordinary income tax on the full amount. That treatment holds regardless of whether your personal contributions were traditional or Roth. A Roth 403(b) does not turn the match tax-free.
What You Owe When You Take the Money Out
Withdrawals from a traditional 403(b) are taxed as ordinary income in the year you receive them. The rate depends on your total taxable income for that year, so the size and timing of withdrawals directly shape the bill. The pretax portion of employer contributions follows the same rule.
Roth 403(b) withdrawals work differently. If you meet the qualified distribution test — age 59½ and at least five tax years since your first Roth contribution to the plan — contributions and earnings come out completely tax-free.
The 10% Early Withdrawal Penalty
Take money out before age 59½ and you generally owe a 10% additional tax on top of any regular income tax. The penalty applies to the taxable portion of the distribution.5Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
Several situations waive the 10%:
- Leaving your job during or after the year you turn 55, for distributions from that employer’s plan. Public safety employees may qualify at 50.
- Total and permanent disability.
- Distributions to a beneficiary after the account holder’s death.
- Unreimbursed medical expenses that exceed 7.5% of your adjusted gross income.
- Up to $5,000 per child for qualified birth or adoption expenses.
An exception waives the 10% only. Withdrawals from traditional accounts are still taxed as ordinary income even when the penalty is off the table.
2026 Contribution Limits
The IRS adjusts 403(b) limits annually for inflation. For 2026:
- Elective deferral limit: $24,500. This is the most you can contribute from your own salary across traditional and Roth 403(b) accounts combined.3Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
- Age-50 catch-up: $8,000 on top of the base limit, bringing employee deferrals to $32,500.6Internal Revenue Service. COLA Increases for Dollar Limitations on Benefits and Contributions
- Ages 60 through 63 catch-up: $11,250 under a SECURE 2.0 provision, in place of the standard $8,000.3Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
- Total annual additions: $72,000, or 100% of your includible compensation, whichever is less. This ceiling covers your deferrals plus all employer contributions.6Internal Revenue Service. COLA Increases for Dollar Limitations on Benefits and Contributions
The 15-Year Service Catch-Up
The 403(b) has a catch-up that 401(k) plans don’t. With at least 15 years of service at the same qualifying employer, you can contribute an extra $3,000 per year above the standard deferral limit, up to a $15,000 lifetime cap.7Internal Revenue Service. Retirement Topics 403b Contribution Limits
Not every 403(b) employer qualifies. This catch-up is available only if your employer is an educational institution, hospital, health and welfare service agency, or church-related organization, and the 15 years must be with the same organization. If you’re also eligible for the age-50 catch-up, excess deferrals are applied to the 15-year catch-up first, then to the age-based catch-up.8Internal Revenue Service. 403(b) Plans – Catch-Up Contributions
Who Can Contribute to a 403(b) in the First Place
A 403(b) isn’t offered to every worker. Only certain employers can sponsor one: public schools and universities, organizations that are tax-exempt under Section 501(c)(3) of the Internal Revenue Code (such as hospitals and charities), and ministers. Workers at for-profit companies typically have access to a 401(k) instead, which has similar pretax and Roth treatment but a different set of rules.9Internal Revenue Service. IRC 403(b) Tax-Sheltered Annuity Plans