401(k) Contribution Limits for 2026: One Combined Cap for Roth and Traditional

The 401(k) Contribution Limit for 2026

The 2026 401(k) employee contribution limit is $24,500, according to the IRS. That number covers your own paycheck deferrals only, whether you route them to a Traditional 401(k), a Roth 401(k), or split between the two.

Contributions have to reach your plan through payroll by December 31. An IRA (Individual Retirement Account) gives you until the following April's tax deadline to fund the prior year, but a 401(k) does not. Miss the calendar year and that year's room is gone.

The limit moves almost every year with inflation. It rose from $23,000 in 2024 to $23,500 in 2025 to $24,500 in 2026, a bigger jump than most years because inflation ran higher. Check the IRS's own contribution-limit page before you set next year's payroll deferral, rather than relying on a number from an old article.

The Roth and Traditional Caps Share One Number

Your Roth 401(k) and Traditional 401(k) contributions draw from the same $24,500 limit, not two separate ones. Put $15,000 into the Traditional side and you have $9,500 of room left for Roth, no more.

People often ask whether the Roth and Traditional caps combine, or whether each side gets its own number. They combine. The IRS treats a Traditional 401(k) dollar and a Roth 401(k) dollar as the same kind of contribution against the cap, even though the two get opposite tax treatment later.

Your employer's match is the one piece that stays outside this number. A match always lands in the Traditional side of your account, pre-tax, no matter which option you picked for your own deferrals. Choose 100% Roth for your own contributions and you still end up with a Traditional balance from the match, taxed on withdrawal.

See Roth 401(k) vs Traditional 401(k) for the tax math behind which side wins for your bracket.

How Much to Split Between Roth and Traditional

A common approach is splitting close to 50/50 between Roth and Traditional, so neither a higher nor a lower future tax rate wrecks the whole plan. Take a worker earning $70,000 who contributes 10% of pay, or $7,000, to their 401(k). Putting half in each side means $3,500 grows tax-free in the Roth and $3,500 lowers this year's taxable income in the Traditional account.

A 50/50 split is not for someone certain their tax rate will fall sharply in retirement, such as a high earner nearing a planned early retirement with a much smaller expected income. That person usually comes out ahead putting closer to 100% in the Traditional side now and converting to Roth later, when the lower bracket makes the conversion cheap.

The split should move when a new fact changes the tax-rate bet behind it. A big pay raise that pushes this year's rate higher is one trigger. A pension or Social Security stream large enough to keep retirement income high is another, and so is new tax legislation that changes future brackets. Run your own numbers through the 401(k) calculator whenever one of those changes.

Catch-Up Contributions for Age 50 and Up

Workers 50 and older can add an $8,000 catch-up contribution on top of the $24,500 base limit for 2026, for a total of $32,500. That catch-up applies whether the extra money goes to the Roth side, the Traditional side, or both.

Workers 60 to 63 get a bigger number instead of the standard catch-up. Under the SECURE 2.0 Act, that group can contribute an $11,250 catch-up, bringing their total to $35,750 for the year. The higher catch-up applies only in the calendar year you turn 60 through the year you turn 63. Turn 64, and the catch-up drops back to the standard $8,000.

A worker who turns 60 in 2026 and maxes out the full $35,750 gets $11,250 more into the account than someone under 50 contributing the base $24,500 alone. That extra money only has a handful of years left to compound before retirement typically starts. Run the gap through the 401(k) calculator to see what it adds to your own payout.

The $72,000 Combined Employer and Employee Limit

Your own paycheck deferrals and everything your employer adds are capped together at $72,000 for 2026, a separate and much higher number than the $24,500 you control directly. This combined limit covers your deferrals, any employer match, and any profit-sharing contribution the plan makes on top.

Reaching $72,000 usually takes a generous employer contribution, since $24,500 from your own paycheck alone leaves $47,500 of room. A business owner running a Solo 401(k) is the case most likely to bump into this ceiling. The same person acts as both the employee and the employer making the profit-sharing contribution, so both halves of the $72,000 cap come from one paycheck. An employee at a typical company with a 4% or 5% match rarely gets close.

The catch-up contribution sits outside the $72,000 combined limit. A worker 50 or older can still add the full $8,000 (or $11,250 at 60 to 63) even after combined employee-and-employer contributions hit the $72,000 mark.

What Happens If You Contribute Too Much

Deferring more than $24,500 across your 401(k) accounts in 2026 creates an excess deferral that has to be corrected. The fix is withdrawing the excess amount, plus any earnings it produced, by April 15 of the following year.

Miss that April deadline and the excess deferral gets taxed twice. It counts as income in the year you contributed it, since it went over the limit. It counts again as income in the year you finally withdraw it, since the IRS never treated it as a real contribution in the first place.

Excess deferrals usually happen to people who change jobs mid-year and contribute close to the limit at each employer. The cap applies across every 401(k) you contribute to, not per employer. Add up your pay stubs from every job you held this year before you assume you are under the cap. Your plan administrator can process the corrective withdrawal once you flag it, so catching the mistake before April 15 keeps it a one-time tax event instead of two.

What Maxing Out a 401(k) Grows Into

Contributing the full $24,500 limit every year for 20 years, at a 7% average annual return, grows to roughly $1,004,000. That number comes from ordinary compounding on the current limit, with no employer match and no assumption that the cap keeps rising. A real result is likely higher, since the limit has increased almost every year.

Stretch the same $24,500 a year to 30 years and the total reaches roughly $2,314,000. The extra decade does more work than the first two combined. Most of that growth comes from returns compounding on a balance that has already grown large, not from the contributions themselves.

These figures use a flat 7% return, a simplification real markets never actually deliver in a straight line. Run your own timeline, contribution amount, and expected return through the 401(k) calculator to see what your specific numbers turn into.

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