Every January, a quiet payroll mistake starts showing up in paychecks across the country.
Someone bumps their 401(k) contribution to what they think is the max, and by October their employer has stopped matching.
The reason is almost always the same: they were working off an old number.
For 2025, the employee contribution limit is $23,500.
If you're 50 or older, catch-up contributions add another $7,500, bringing your total to $31,000.
There's also a newer "super catch-up" of $11,250 for workers aged 60 through 63 — a group that got its own higher tier for the first time.
Those numbers rose from $23,000 and $30,500 in 2024, and plenty of people never updated their payroll settings.
Here's why that matters more than it sounds.
If you set your contributions back when the limit was lower and left them alone, you've been under-saving without noticing.
A $500 gap sounds small, but invested over 20 years it can quietly turn into several thousand dollars you never see.
The fix takes about five minutes in your benefits portal.
The bigger trap is what happens when you divide the limit by 26 paychecks.
That's roughly $904 per pay period for the base limit, or about $1,192 if you're 50-plus.
Hit that number too early in the year and some employers stop matching once you've maxed out.
Others use a "true-up" contribution at year-end to make you whole.
If your plan doesn't offer a true-up, spreading your contributions evenly across all 26 paychecks protects the match.
Also worth knowing: your employer's match doesn't count toward the $23,500.
Total contributions from you plus your employer can reach $70,000 in 2025, or $77,500 if you're 50 or older.
That ceiling matters mostly to high earners, but it's a reminder that the limit you hear quoted on the news isn't always the one that applies to you.
If your income jumped this year, there's a second deadline to watch.
Higher earners — generally those making over $145,000 — now have to make catch-up contributions as Roth dollars starting in 2026, which changes the tax math for anyone planning to max out in their final working years.
Payroll systems are still catching up, so confirm your elections in writing.
The simplest move: log in this week, check your per-paycheck percentage, and compare it against the current cap.
If you can't hit the max, at least grab the full employer match — that's an instant return no market can promise.
Retirement limits change almost every year, and payroll systems don't always flag it when you fall behind.
Treat this like a yearly oil change: boring, quick, and expensive to skip.
Final Thoughts
Five minutes now beats discovering in December that you left free money on the table.