The standard 401(k) contribution limit for 2026 is $24,500 in employee deferrals, up from $23,500 in 2025.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026 Most workers contribute well under that ceiling. Fidelity’s early 2025 data put the average employee contribution rate at a record 9.5% of salary, with employer contributions adding another 4.8% on top.
The $24,500 cap covers everything you personally defer from your paycheck across every 401(k) you participate in during the year. Two jobs, two plans, one shared limit. Going over triggers taxation of the excess in the year you contributed it, and if the excess isn’t withdrawn by April 15 of the following year, it can be taxed again when it eventually leaves the plan.2Internal Revenue Service. Consequences to a Participant Who Makes Excess Annual Salary Deferrals
The Bigger Ceiling That Includes Your Employer
A separate, larger limit applies to everything that goes into your account from all sources combined: your deferrals, employer matching, and any profit-sharing. For 2026, that total is capped at $72,000 or 100% of your compensation, whichever is less.3Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs Most workers don’t come close. It matters mainly if your employer offers unusually generous matching or profit-sharing.
Catch-Up Contributions at 50 and Older
Once you reach age 50, you can put in more than the standard limit. For 2026, the regular catch-up is $8,000, which lifts your maximum employee deferral to $32,500.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026
Starting in 2026, a SECURE 2.0 provision creates a bigger window for workers who turn 60, 61, 62, or 63 during the year. That group can make catch-up contributions of up to $11,250 instead of $8,000, bringing the total possible employee deferral to $35,750.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026 The enhanced amount only applies if your plan has adopted the provision, so ask your plan administrator before you count on it.
Higher earners face a new rule in 2026. Employees who earned $150,000 or more in FICA wages the prior year must make any catch-up contributions on a Roth (after-tax) basis. If your plan doesn’t offer a Roth option, you can’t make catch-up contributions at all. Workers below the wage threshold can still choose either pre-tax or Roth for their catch-up dollars.4Office of the Law Revision Counsel. 26 USC 414 – Definitions and Special Rules
What Workers Actually Put In
Average contribution rates have been climbing. Fidelity’s early 2025 figures showed a 9.5% employee rate combined with a 4.8% employer contribution, for a total savings rate of 14.3%. That is close to the 15% of income many financial planners point to as a reasonable target. Averages hide a wide spread. Plenty of workers contribute less than 5%, and a smaller group hits the $24,500 cap every year.
Auto-enrollment is pulling the average up. Under SECURE 2.0, most new 401(k) plans established after December 29, 2022 must automatically enroll eligible employees starting with the 2025 plan year. The default deferral has to fall between 3% and 10% of pay, with automatic annual increases of at least 1% until the rate reaches somewhere between 10% and 15%. You can opt out or pick your own rate, but the default sets the floor for people who never take action.
If you haven’t touched your contribution rate since you were hired, there’s a good chance you’re still sitting at whatever default your employer picked. A 3% starting rate beats zero, but it’s well below what most people need. Nudging your rate up by a point or two a year, especially after a raise, closes the gap without a noticeable hit to your paycheck.
Capture the Employer Match First
The single most common mistake in 401(k) planning is contributing less than your employer’s match threshold. A dollar-for-dollar match up to 4% of pay is common: on an $80,000 salary, deferring at least $3,200 gets you $3,200 from the company, an immediate 100% return before any market gains.
Partial matches are also widespread. A typical version pays 50 cents per dollar you contribute, up to 6% of pay. On that same $80,000 salary, deferring 6% ($4,800) captures a $2,400 employer contribution. You have to put in more of your own money to get the full match, but the total is still money you’d otherwise leave on the table.
Before you fine-tune your investment mix or agonize over pre-tax versus Roth, make sure your deferral rate is at least high enough to grab every dollar your employer will match.
When You Can’t Reach the Full Limit
A high salary doesn’t guarantee access to the full $24,500. The IRS requires 401(k) plans to pass nondiscrimination tests comparing what higher-paid employees defer against what everyone else defers. If rank-and-file participation is low, the plan may have to restrict how much its top earners can contribute.
You’re a highly compensated employee if you earned more than $160,000 from your employer in the prior year, or owned more than 5% of the business at any point during the current or prior year.5Internal Revenue Service. 401(k) Plan Fix-It Guide – The Plan Failed the 401(k) ADP and ACP Nondiscrimination Tests
The main test, the Actual Deferral Percentage test, compares the average deferral rate of highly compensated employees to the average rate of everyone else. Highly compensated employees generally can defer no more than 2 percentage points above the non-highly-compensated average, or 125% of that average, whichever is more favorable.5Internal Revenue Service. 401(k) Plan Fix-It Guide – The Plan Failed the 401(k) ADP and ACP Nondiscrimination Tests If the plan fails, your employer may refund some of your contributions early the following year. Plans with a safe harbor match design sidestep the test entirely.
Splitting Between Pre-Tax and Roth
Most plans let you divide your contribution between traditional pre-tax and designated Roth. Pre-tax dollars come out of your paycheck before income tax, lowering your taxable income now; you pay tax when you withdraw the money in retirement.6Internal Revenue Service. Roth Comparison Chart If you expect to be in a lower tax bracket after you stop working, pre-tax generally comes out ahead.
Roth contributions are taxed now, and qualified withdrawals in retirement, including all the earnings, come out tax-free. A withdrawal is qualified once your Roth account has been open at least five years and you’re either 59½ or older, disabled, or deceased.6Internal Revenue Service. Roth Comparison Chart If you expect higher tax rates in retirement, or you value tax-free income later, Roth tends to win.
The $24,500 limit is one shared cap. You can split your deferrals between pre-tax and Roth however you like, but the two together can’t exceed the annual limit.7Internal Revenue Service. Retirement Topics – Designated Roth Account
Changing Your Contribution Rate
Most employers let you adjust your deferral through the plan provider’s site. Log into your account at Fidelity, Vanguard, Schwab, or whichever provider your employer uses, find the contributions or elections page, and enter a new percentage. If your plan offers both pre-tax and Roth, you’ll specify the split. Changes typically take effect within one or two pay cycles.
Before you pick a number, know three things: your gross salary, how much your employer will match, and what your budget can handle. If you can afford 10% and your match tops out at 6%, put in at least 6% to capture the full match; the rest is pure personal saving. After you submit the change, check your next pay stub. Payroll mistakes happen, and catching one early is much easier than sorting out excess or under-contributions at year-end.