401(k) Limit Rises to $25,500: Reset Your Percentage

You set your 401(k) to 20% a few years ago and stopped thinking about it. Then the IRS raised the 401(k) limit to $25,500 for next year, and your payroll system did nothing at all. Your percentage stayed exactly where you left it.

That gap is easy to miss. The new limit is a ceiling, not an instruction, and your plan will not chase it for you. Set the wrong percentage and you either leave room unused or hit the cap so early that you lose part of your employer match.

This guide shows you how to work out the right number for your paycheck, when to change it, and the one front-loading mistake that quietly costs high earners thousands of dollars.

What Changed in the New 401(k) Limit

The IRS announced the figures on November 12. According to the IRS newsroom release, the employee deferral limit for 401(k), 403(b), governmental 457 plans and the federal Thrift Savings Plan rises by $1,000, to $25,500.

Here is what moved and what did not:

• 401(k) employee limit: $25,500, up from $24,500.
• Catch-up for age 50 and older: $8,500, up from $8,000, for a total of $34,000.
• Higher catch-up for ages 60 to 63: $11,750.
• IRA limit: $7,500, unchanged. The IRA catch-up stays at $1,100.
• SIMPLE IRA limit: $17,500, up from $17,000.

The $25,500 cap covers only your own contributions. Employer matches and profit-sharing deposits sit on top of it, under a separate and much higher limit. So a generous match never eats into your personal room.

If you are 50 or older and earn a higher salary, the catch-up comes with its own wrinkle. We covered that in detail in our guide to the 401(k) catch-up rule that hits $150,000 earners, so this piece sticks to the base limit.

Why Your Percentage Will Not Keep Up on Its Own

Most people choose a percentage of pay, not a dollar amount. That works fine until the limit moves. A percentage tracks your salary, not the IRS.

Take a saver earning $120,000 a year who contributes 20.4%. That rate produced $24,480 this year, just under the old $24,500 cap. With no raise, the same rate produces the same $24,480 next year. That leaves $1,020 of tax-advantaged room unused.

To max out at $120,000, you now need 21.25%. Many plans only accept whole percentages, which creates a choice:

• 21% gets you $25,200, which is $300 short of the cap.
• 22% gets you $26,400 of scheduled contributions. Your plan stops deferrals once you reach $25,500, which happens on the final paycheck or two of the year.

For most people, rounding up is the better move, as long as you read the next section first. Hitting the cap in late December is harmless. Hitting it in September is not.

The Per-Paycheck Math

If your plan lets you choose a flat dollar amount, the math is simpler. Divide $25,500 by your number of pay periods:

• Weekly (52 paychecks): $490.38
• Biweekly (26 paychecks): $980.77
• Twice monthly (24 paychecks): $1,062.50
• Monthly (12 paychecks): $2,125

Compared with this year, a biweekly saver who maxed out needs about $38.46 more per paycheck. On pretax money, your take-home pay drops by less than that, because the extra contribution also lowers your taxable income.

The Front-Loading Trap That Costs Your Match

Some high earners set a big percentage so they hit the cap early and enjoy bigger paychecks later in the year. It feels efficient. Whether it works depends on how your employer pays the match.

Most plans calculate the match per paycheck. If you contribute nothing in a given pay period because you already hit the cap, the employer has nothing to match in that period. Unless the plan has a true-up (a year-end catch-up deposit that fixes the shortfall), that money is simply gone.

A Worked Example With Real Numbers

Say you earn $200,000, are paid biweekly, and your employer matches 100% of contributions up to 4% of pay. Each paycheck is $7,692.31 gross, and the full match is worth $8,000 a year.

You set your deferral to 20%, or $1,538.46 per paycheck. Here is what happens:

1. After 16 paychecks you have contributed $24,615.38.
2. The 17th paycheck adds the last $884.62 and you reach the $25,500 cap in early September.
3. Paychecks 18 through 26 carry no contribution, so they carry no match either.

Your employer matched 17 paychecks at $307.69 each, or $5,230.77. You missed nine paychecks of match, worth $2,769.23. With a true-up, the plan deposits that at year-end. Without one, you just gave up nearly $2,800 of free money for the privilege of maxing out early.

The fix is easy. At $200,000, a 12.75% deferral spreads $25,500 evenly across all 26 paychecks, and every paycheck earns the full 4% match. Same contribution, $2,769 more in your account.

Check before you front-load: search your plan's Summary Plan Description for "true-up" or call the plan administrator. If the answer is no, spread your contributions across the full year.

Missing the Match Costs More Than Missing the Max

Only a small group of people needs to worry about hitting $25,500. CNBC reported that just 14% of participants maxed out their 401(k) last year, citing Vanguard's How America Saves data across nearly 5 million participants. The same report cited Fidelity data showing about 19% of employees were not deferring enough to get their full employer match.

That second number matters more. The reality is that a missed match is a guaranteed loss, while an unused slice of the cap is just a missed opportunity. If you are in that 19%, the new limit is not your problem yet. Your first move is to raise your rate to at least the match threshold.

So what does an extra $1,000 a year actually buy you? Invested for 25 years at a 7% average annual return, contributing $1,000 a year grows to roughly $63,000. You can test your own numbers with our compound interest calculator. Small yearly increases matter because they compound for decades, not because any single year is large.

When and How to Change Your Contribution

Timing is the part people get wrong. The new limit applies to paychecks dated in January or later, based on the pay date, not the work period. A paycheck covering the last week of December but paid on January 2 counts toward next year.

Payroll also needs lead time. Many employers process a deferral change one or two pay cycles after you submit it. To have the new rate in place for your first January paycheck, aim to submit it in early December.

Follow these steps:

1. Find your pay frequency and your expected salary next year, including any raise you already know about.
2. Divide $25,500 by your salary to get the percentage needed to max out, or divide by your pay periods for a dollar amount.
3. Confirm your match formula and whether the plan offers a true-up.
4. Round your percentage so you reach the cap near the end of the year, never months early, unless a true-up protects you.
5. Check your first January pay stub to make sure the new rate took effect.

Some plans offer automatic escalation, which raises your rate by a set amount each year. CNBC cited a PSCA survey finding about 27% of plans use it, and most of those raise deferrals by 1% a year. That helps, but it is not tied to the IRS limit, so it can still overshoot or undershoot the cap.

Do Not Forget the IRA and Roth Phase-Outs

The IRA limit stayed at $7,500, so nothing changes there for most savers. The income limits did move, and that matters if you got a raise.

For a Roth IRA, the phase-out range rises to $158,000 to $173,000 for single filers and $250,000 to $260,000 for married couples filing jointly. If your income lands inside that range, you can only make a partial Roth contribution. Above it, you cannot contribute directly at all.

The deduction range for a traditional IRA also rose. A single filer covered by a workplace plan now phases out between $83,000 and $93,000. That is the band where a raise can quietly turn a deductible IRA contribution into a nondeductible one. If inflation has been eating your raises, as we explored in why your raise is smaller than inflation, these higher thresholds give you a little breathing room.

One more figure for lower earners: the Saver's Credit income limit rises to $83,000 for married couples filing jointly and $41,500 for single filers. If you qualify, part of your contribution comes back as a tax credit.

Frequently Asked Questions

What is the 401(k) limit for next year?

The employee contribution limit rises to $25,500, up from $24,500. Savers 50 and older can add an $8,500 catch-up, and those aged 60 to 63 can add $11,750 instead. Employer contributions do not count toward the $25,500 limit.

Does my 401(k) contribution automatically increase with the new limit?

No. Your plan keeps whatever percentage or dollar amount you chose. If you want to contribute the new maximum, you need to update your election, ideally in early December so it applies to your first January paycheck.

What percentage of my salary do I need to max out my 401(k)?

Divide $25,500 by your annual salary. At $100,000 you need 25.5%, at $120,000 you need 21.25%, and at $200,000 you need 12.75%. If your plan only allows whole numbers, round up so you reach the cap near the end of the year.

Do I lose my employer match if I max out my 401(k) early?

You can. Many plans match per paycheck, so once your contributions stop, the match stops too. If your plan offers a true-up, your employer makes up the difference after year-end. If it does not, spread your contributions evenly across all pay periods.

Did the IRA contribution limit change?

No. The IRA limit stays at $7,500, with a $1,100 catch-up for savers 50 and older. The income ranges for Roth IRA eligibility and traditional IRA deductions did rise.

Reset the Number, Then Leave It Alone

The new 401(k) limit only helps you if your payroll election reflects it. Work out the percentage that reaches $25,500 by your final paycheck, not months before it. Confirm your match formula and whether a true-up exists.

If you are not yet capturing your full match, start there instead. That one change is worth more than chasing the cap. Spend ten minutes in your benefits portal before December payroll locks, then check your first January pay stub. After that, the money does the work.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Always consult with a qualified financial advisor before making investment decisions. Past performance is not indicative of future results.