IRS Raises 401(k) Limit to $25,500 for 2027 as Stocks Whipsaw. He’s Turning 64 and Doesn’t Realize His Contribution Ceiling Is Actually Falling by $1,750
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Consider a hypothetical 63-year-old engineer with about $900,000 in his 401(k). He learns the IRS raised the 401(k) limit to $25,500 for 2027 and plans to sock away more cash. Stocks keep swinging, and he wants every tax-advantaged dollar he can get before he retires. He turns 64 in 2027, though, so his personal ceiling is about to drop by $1,750.
Three 2027 Limits Moved, and Only Two Still Apply to Him
The first number looks like good news for him. The IRS raised the standard 401(k) contribution limit to $25,500 for 2027, up $1,000 from this year’s $24,500. With retirement approaching, he figures that gives him more room to build his savings.
And there’s more. Workers 50 and older can contribute an additional $8,500 in catch-up money next year, bringing their total to $34,000. That’s $1,500 more than the general limit for that age group in 2026.
But Congress created an even bigger opportunity for workers in their early 60s. Under SECURE 2.0, those turning 60 through 63 in 2027 qualify for an enhanced catch-up of $11,750. Combined with the standard limit, they can put away $37,250.
That’s where our engineer runs into trouble. He qualified for the larger catch-up at 63, but turning 64 puts him back in the regular 50-plus group. While younger colleagues can save as much as $37,250 next year, his ceiling falls to $34,000. The IRS raised the limits, yet he personally loses contribution room.
Why His $35,750 Ceiling Shrinks to $34,000
This year, at 63, he can contribute the standard $24,500 plus the $11,250 enhanced catch-up, for a maximum of $35,750.
Next year, at 64, he gets $25,500 plus $8,500, for $34,000.
The higher standard limit gives him $1,000 more room. Moving from the enhanced catch-up to the regular one takes away $2,750. On balance he can save $1,750 less, in one of his last working years.
The tax value depends on his pay. In 2027, the 24% bracket starts above $218,250 for married couples filing jointly. At that rate, $1,750 of pretax deferral would cut about $420 from his federal bill.
If his 2026 Social Security wages from his employer exceed $155,000, though, his 2027 catch-up must go into a Roth account. In that case, the lost room is Roth room. That matters because designated Roth accounts carry no required minimum distributions (RMDs) while the owner is alive. Qualified Roth withdrawals are tax-free, so they won’t increase taxes on his Social Security or trigger Medicare surcharges.
Those pre-RMD years, when tax rates can be unusually low, are also when Roth conversions pay off most (we sized up that window in a free guide here: The Roth Window).
A December Birthday Still Costs Him the Whole Year
Eligibility is set by the calendar year. The 2027 enhanced limit covers people who attain age 60, 61, 62, or 63 in 2027. If he turns 64 on any day in 2027, even December 31, he’s out for all of 2027. The flip side is that 2026 is fully his enhanced year, whatever his birth date.
His plan also has to allow catch-up contributions. IRS rules don’t require every 401(k) plan to offer them. Payroll systems vary, so he should confirm the enhanced amount is available.
A Market Drop and Lost Contribution Room Need Different Fixes
Market swings change what his account is worth, while IRS limits stay fixed. A sell-off cuts the value of what he already has, though time and a reasonable allocation may help him recover. The $1,750 is lost capacity: a smaller tax shelter for money he hasn’t saved yet. He can’t make it up later.
The two problems call for different responses. Market swings are a reason to revisit his mix of stocks and bonds as retirement gets closer. His smaller contribution limit is a timing problem. If he wants to put away the full $35,750 allowed in 2026, he has to do it before the year ends. Once that opportunity passes, he can’t get it back. Contributing during a market drop also has a side benefit: each paycheck buys more shares at lower prices.
What to Do Before December 31
- Check your 2026 total. Pull year-to-date deferrals from your latest pay stub. If you’re below $35,750 and turn 60 through 63 this year, consider raising your deferral rate for the remaining paychecks. Payroll changes often take a cycle to process.
- Confirm your plan’s catch-up setup. Ask HR whether the plan offers the enhanced catch-up and whether it offers a Roth option. Then check Box 3 of your 2026 W-2 when it arrives. Above $155,000 means your 2027 catch-up must be Roth.
- Run your own numbers, then max the 2026 window. Compare your current bracket with what you expect in retirement. If cash flow allows, use the full enhanced amount this year. It’s use-it-or-lose-it room, and at 64 it won’t come back.
Contact [email protected] for any questions or corrections.
Gerelyn Terzo is the author of dividend investing handbook "Dividend Investing Strategies: How to Have Your Cake & Eat It Too." A veteran financial journalist, she covers agri-finance for outlets like Global AgInvesting and the broader stock market and personal finance for 24/7 Wall Street. She began at CNBC and later helped launch Fox Business in New York. Gerelyn currently resides in Woodland Park, Colorado and dabbles in nature photography as a hobby.
