If you’re asking how much you should contribute to your 403(b), the working answer is this: put in at least enough to capture your full employer match, then build toward roughly 15% of your gross income, staying under the 2026 elective deferral limit of $24,500.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Where you land inside that range depends on your age, your debt, and how much room your monthly budget can spare.
Get the Full Employer Match First
If your employer matches contributions, that match sets the floor for what you should be putting in. A dollar-for-dollar match up to 5% of your salary is a 100% return before the money is even invested. A fifty-cent match on the dollar is still a 50% return. Contributing less than what triggers the full match means leaving compensation you already earned on the table.
The formula varies. Some employers match dollar-for-dollar up to a set percentage of salary, others match fifty cents on the dollar up to a higher percentage, and a few use tiered structures. Your Summary Plan Description, available through human resources, spells out the formula and the vesting schedule. Vesting matters: some plans require three to five years of service before matching dollars fully belong to you, and leaving before you’re vested means forfeiting part or all of the match.
If You’re Also Paying Student Loans
For plan years after December 31, 2023, employers can treat qualified student loan payments as if they were elective deferrals for matching purposes.2Internal Revenue Service. Guidance Under Section 110 of the SECURE 2.0 Act With Respect to Matching Contributions Made on Account of Qualified Student Loan Payments Not every plan has adopted this, but if yours has, you can direct cash to loan payments and still collect the employer match. Ask your benefits office before deciding you can’t afford to contribute.
Aim for 15% of Gross Income
Once the match is captured, a common savings target is 15% of gross income for retirement, counting any employer match toward that total. For someone earning $65,000, that’s about $9,750 a year, or $812 a month. If your employer covers 4% through matching, roughly $2,600 of the target is already accounted for, and your personal share drops to about $7,150.
Fifteen percent is a benchmark, not a starting line. If it’s not realistic right now, start where you can and raise your deferral rate by 1% of salary each year, ideally in the same paycheck as your annual raise so the increase is barely visible in take-home pay. Someone who begins at 6% at age 30 and adds a point a year is contributing 15% by 39, with decades of compounding still ahead.
Work Backward From Your Budget
Subtract fixed costs, including housing, utilities, insurance, minimum debt payments, and groceries, from your after-tax income. What’s left is the pool that has to cover discretionary spending, emergency savings, and retirement. If the math leaves nothing for retirement, contribute just enough to get the full employer match and revisit the number after the next raise or once a debt is paid off. That match is part of your compensation package. Not taking it is closer to declining a raise than to skipping an optional benefit.
The Pre-Tax Paycheck Effect
Because traditional 403(b) contributions come out before federal and state income taxes, the hit to your take-home pay is smaller than the contribution itself. A $300 monthly contribution in the 22% federal bracket reduces your paycheck by roughly $234, not the full $300. The exact reduction depends on your combined marginal rate, but the gap often surprises people. Run the numbers before assuming you can’t afford a higher deferral.
2026 Contribution Limits You Need to Stay Under
Federal law caps how much can flow into your 403(b) each year, and there are two ceilings to know.
Your Personal Deferral Limit: $24,500
The elective deferral limit for 2026 is $24,500. This covers everything you personally put in, whether pre-tax or Roth combined.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 If you also contribute to a 401(k) or a second 403(b) at another job, the $24,500 applies across all of those plans together, not to each one separately.
The Total Cap: $72,000
A higher ceiling covers the combined total of your deferrals plus any employer matching or nonelective contributions. For 2026, that total is the lesser of 100% of your compensation or $72,000.3Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs – Notice 2025-67 Most employees never approach this figure, but it can come into play with an unusually generous match or a modest salary that triggers the 100%-of-compensation limit.4Office of the Law Revision Counsel. 26 USC 415 – Limitations on Benefits and Contribution Under Qualified Plans
Catch-Up Room if You’re 50 or Older
Turning 50 or older during the calendar year unlocks an additional $8,000 in deferrals, bringing your personal total to $32,500 in 2026.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 If you turn 60, 61, 62, or 63 during the year, a higher SECURE 2.0 catch-up applies, set at $11,250 for 2026 and lifting your personal cap to $35,750. Once you turn 64, you revert to the standard $8,000.
A separate 15-year special catch-up unique to 403(b) plans allows an additional $3,000 per year (subject to formula limits) if you’ve worked for the same qualifying employer for at least 15 years.5Internal Revenue Service. 403(b) Plans – Catch-Up Contributions Your plan administrator can tell you whether you qualify and how much extra room you have.
One rule to flag for higher earners: starting in 2026, if your wages from your 403(b) employer exceeded $150,000 in 2025, any age-based catch-up contributions must go into a designated Roth account.3Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs – Notice 2025-67 If your plan doesn’t offer a Roth option, you can’t make catch-up contributions at all until it does. The 15-year special catch-up is exempt from this rule.
When to Contribute Less Than 15%
Two situations argue for pulling back below the 15% target, at least temporarily.
High-Interest Debt
If you’re carrying credit card balances at 20% or higher, the guaranteed return from paying that debt down usually beats the expected return from retirement investments. The sequence that works for most people: contribute enough to get the full match, since no credit card rate beats a 50–100% match, then throw extra cash at the high-rate debt, then redirect the freed-up payment into your 403(b) once it’s gone.
Expensive Plan Investments
403(b) plans have historically carried higher fees than 401(k) plans, in part because many offer annuity contracts alongside or in place of mutual funds.6Office of the Law Revision Counsel. 26 USC 403 – Taxation of Employee Annuities A Government Accountability Office study found investment expense ratios in 403(b) plans ranging from 0.01% to over 2.3%, with some non-ERISA plans reporting expenses as high as 3.74%.7United States Government Accountability Office. Defined Contribution Plans – 403(b) Investment Options, Fees, and Other Characteristics Varied Over 30 years on a six-figure balance, the gap between a 0.10% expense ratio and a 1.50% one runs into six figures of lost growth. Compare expense ratios inside your plan before deciding where to direct new contributions. If low-cost index funds are available, they’re usually the most efficient choice. If the only options are expensive, you may still want the match, but consider whether additional dollars above the match belong in an IRA instead.
Splitting Between Roth and Traditional
If your plan offers both a traditional and a Roth 403(b), the $24,500 deferral limit applies to the two combined. The question isn’t how much to save but how to divide it.
Traditional contributions reduce your taxable income now, which helps if you’re in a high tax bracket today and expect a lower one in retirement. Roth contributions come out of after-tax pay, so they hit your paycheck harder, but qualified withdrawals in retirement, including decades of growth, come out tax-free.8Internal Revenue Service. IRC 403(b) Tax-Sheltered Annuity Plans For a Roth withdrawal to be fully tax-free, the account must have been open at least five tax years and you must be 59½, disabled, or deceased.
Early-career workers expecting income and tax bracket to climb tend to benefit most from Roth, because they’re locking in a lower rate now. Workers near retirement with high current earnings often do better with traditional contributions. Splitting between both is a reasonable hedge against future tax uncertainty.
If You Contribute Too Much
Going over the $24,500 elective deferral limit triggers a correction with a hard deadline. You must withdraw the excess and any earnings on it by April 15 of the following year. Contribute too much in 2026, and the deadline is April 15, 2027.9Internal Revenue Service. 403(b) Plan Fix-It Guide – Excess Elective Deferrals Excess removed by the deadline is taxed once, in the year of the deferral. Miss it, and the same money gets taxed twice: once in the year contributed and again in the year finally withdrawn. This is worth watching if you contribute to more than one employer plan or change jobs mid-year, because your new employer’s payroll system won’t know what you already deferred somewhere else.