A 60-Year-Old Who Starts Maxing a 401(k) Before October Can Still Add $35,750 This Year
Workers aged 60 to 63 sit inside a contribution window that closes permanently at 64, and most of them never adjust their payroll elections to take full advantage of it. Here is what closing that gap before December actually costs…
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A 60-year-old who hasn’t fully funded a 401(k) has one quarter left to close the gap. That window is worth more at 60 than at 59 or 64. Workers aged 60 to 63 get the largest employee contribution limit available in any workplace plan.
Why Ages 60 to 63 Get a Bigger Ceiling Than Everyone Else
The 2026 employee elective deferral limit is $24,500. The catch-up for workers 50 and older is $8,000 age 50 to 59 and age 64 or older, $11,250 age 60 to 63.
The New York Times spells out what those numbers add up to. Workers in the early-sixties tier can contribute a total of as much as $35,750. Other workers 50 and older top out at $32,500.
At age 64, this enhanced or “super” catch-up option no longer applies, and you return to the regular catch-up amount. The higher limit covers only ages 60, 61, 62 and 63. Unused room in a given year is lost because it never carries forward. For someone with $800,000 already in the plan, these are the last years when extra tax-advantaged dollars can compound for a decade or more.
How to Reach $35,750 With One Quarter Left
- Find your remaining room: Your latest pay stub shows year-to-date deferrals. Subtract from the $35,750 ceiling; pre-tax and Roth deferrals share one limit.
- Spread the gap across remaining paychecks: Divide your remaining room by the number of 2026 paychecks left. Enter the election as a flat dollar amount to avoid exceeding when a bonus lands.
- Check payroll deadlines and plan caps: A change submitted in late September may not take effect for a pay cycle or two. Many plans cap the share of each paycheck you can contribute.
- Check your plan. Confirm how it routes catch-up dollars: Some employers automatically shift contributions over the standard catch-up amount into the plan’s Roth component, while others require you to opt in.
Expect your take-home pay to shrink. Social Security and Medicare taxes still come out of deferred wages, and Roth dollars carry income tax, so if you stuff most of a year’s contributions into a few checks, those checks become very small. Cover living costs for those months from cash or a taxable brokerage account instead.
Earned More Than $150,000 Last Year? Your Catch-Up Goes Roth
For 2026, employees 50 and older who earned more than $150,000 in 2025 must make their catch-up contributions to a Roth 401(k). To see whether this applies to you, check Box 3 of your 2025 W-2, which shows wages subject to Social Security tax. Side income reported on a 1099 or K-1 doesn’t count toward the threshold.
This rule raises your tax bill this year. A 62-year-old in the 24% bracket putting in the full $11,250 would previously have cut federal income tax by about $2,700. Higher tax bills “may come as a surprise.”
Paying that tax now is the better deal for most. Traditional 401(k) withdrawals count as ordinary income and add to atop Social Security, making more of your benefit taxable and causing Medicare IRMAA surcharges. Roth 401(k) money has none of those effects. Since 2024, Roth 401(k)s no longer carry required withdrawals. If your plan has no Roth option, you can’t make any catch-up contributions if you’re above the threshold. If you started with a new employer in 2026, you’re generally exempt. A big pre-tax balance eventually becomes a big taxable withdrawal once RMDs kick in, which is the problem we mapped out in a free guide to defusing the first-year tax bomb.
Three Moves to Make Before December Payroll Closes
- Change your deferral this week: Every pay cycle missed leaves fewer checks to carry the remaining amount. Confirm the new amount goes through on the first adjusted paycheck.
- Pull up Box 3. Find it on your 2025 W-2: If it shows more than $150,000, plan your cash flow around the Roth catch-up paying no upfront tax break.
- Consider Roth even if the rule doesn’t apply: Workers under the threshold may still choose Roth for their catch-up. If your traditional balance is already large enough that future required withdrawals could push you into IRMAA territory, choose Roth anyway.
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Joel South covers large-cap stocks, dividend investing, and major market trends, with a focus on earnings analysis, valuation, and turning complex data into actionable insights for investors.
He brings more than 15 years of experience as an investor and financial journalist, including 12 years at The Motley Fool, where he served as an investment analyst, Bureau Chief, and later led the Fool.com investing news desk. He has also co-hosted an investing podcast and appeared across TV and radio discussing market trends.
