The IRS has raised the 401(k) contribution limit for 2025, and the new ceiling is high enough that a lot of workers who thought they were maxing out are actually leaving room on the table.
For anyone paid biweekly, the difference works out to real money moving out of take-home pay — or real money left unclaimed in a tax-advantaged account.
The employee deferral limit climbs to $23,500, up from $22,500.
That extra $1,000 sounds modest, but it compounds.
If you're in the 22% federal bracket, deferring that additional grand saves you roughly $220 in federal tax this year alone, before any state tax or growth over decades.
There's a bigger jump buried in the fine print for workers aged 50 to 59.
Catch-up contributions for that group rise to $11,250, while everyone 50 and older who isn't in that window stays at $7,500.
That's a change worth checking if you or a spouse sits in that age band, because the gap between the two numbers is $3,750.
Employer matches still count toward a separate, much higher overall cap — $70,000 for 2025, plus catch-up.
That distinction trips people up every year.
Your own deferrals stop at $23,500 (or $31,000 with the age-50 catch-up), but the total that can land in the account is far larger once a match and any after-tax contributions are included.
Here's the part that actually stings: many people set a contribution percentage years ago and never revisited it.
If you signed up at 6% to grab a match, you may be nowhere near the limit — and if you switched jobs, your new plan might be deducting at a different default rate entirely.
A quick three-step check takes about ten minutes.
Log into your plan, look at the dollar amount you're on pace to defer this year, and compare it to the new cap.
If there's a gap and your budget can absorb it, bump the percentage; if cash is tight, at least capture the full employer match, which is an immediate return no savings account can touch.
If you hit the cap by October, some employers stop matching for the rest of the year unless your plan has a true-up provision.
Spreading contributions across all 12 months usually protects the match.
The limit moved, your paycheck math may not have, and the fix is a few clicks rather than a financial overhaul.
Final Thoughts
Check your pace now, adjust once, and let the tax break do the rest — that's the kind of raise nobody has to approve but you.