If you have a 401(k), you are 50 or older, and your W-2 wages topped $150,000 in 2025, the rules for your catch-up contribution quietly flipped on January 1. You can still make the extra contribution. You just cannot make it pretax anymore. Every dollar of your 401(k) catch-up money is now forced into a Roth 401(k), taxed today, tax-free later. This is the SECURE 2.0 mandatory Roth catch-up rule, and it changes the math for high earners in a real way.
What You Need to Know
For decades, the catch-up contribution was a straight tax deduction. Turn 50, throw an extra chunk into your 401(k), shave that amount off your taxable income. Starting this year, if you cleared the wage threshold in the prior year, the IRS strips that pretax option away. Your $8,000 catch-up (or $11,250 super catch-up if you are 60 to 63) has to go into the Roth side of your plan. No deduction now. No tax on qualified withdrawals later.
The Proof
This comes straight out of Section 603 of the SECURE 2.0 Act, passed in 2022. It was originally scheduled for 2024 but the IRS delayed it to give plan sponsors time to build the Roth infrastructure. The provision took effect on January 1, 2026. The threshold in the statute is $145,000, but it is adjusted each year for inflation, and the number that governs 2026 catch-ups is $150,000 in 2025 wages.
Who It Hits, Who It Skips
You are in the crosshairs if you are 50 or older in 2026 and your Box 3 wages on your 2025 W-2 (Social Security wages) exceeded $150,000 from a single employer. Only that Box 3 figure counts. Side-gig income on a 1099 or partnership income on a K-1 does not count toward the threshold. Change jobs mid-year and neither employer paid you over $150,000? You escape for 2026. The rule also covers 403(b) plans at nonprofits and government 457(b) plans, but it does not touch IRAs.
How to Actually Use It
- Pull your 2025 W-2 and read Box 3. If it is above $150,000, you are subject to the rule for 2026.
- Confirm your 401(k) plan has a Roth option. If the plan does not offer a Roth bucket, you cannot make any catch-up contribution at all this year. Push HR to add it.
- Max the pretax base first. In 2026 that is $24,500 for everyone under the catch-up age.
- Then route the catch-up into the Roth 401(k). $8,000 for ages 50 to 59 and 64+, or $11,250 for ages 60 to 63, bringing your total to $32,500 or $35,750.
- Adjust your withholding. That catch-up money is now taxable wages, so your paycheck tax bill goes up.
Considering broader Roth positioning at this income level is worth a look. Our Roth Window report walks through when it makes sense to embrace the tax-now math instead of fight it.
The Catch
The obvious sting is the tax bill. A 55-year-old in the 24% bracket maxing the $8,000 catch-up loses roughly $1,900 in federal tax savings compared with the old pretax treatment. A 62-year-old making the full $11,250 super catch-up loses around $2,700 in immediate deduction value. The less obvious catch: if your employer’s plan has not been updated to allow Roth catch-ups, you are locked out of catch-up contributions entirely until they fix it. Call your plan administrator this week. And if you are planning to retire in a lower-tax state, remember you are prepaying tax at today’s federal rate on money you would have otherwise deferred.
Who Wins
The winners are workers with 10+ years of tax-free compounding ahead, anyone who expects higher tax rates in retirement, and savers who already have big traditional 401(k) balances and want to build a Roth bucket for withdrawal flexibility. With the 10-year Treasury yielding 4.56% and the personal savings rate down to 3.9% in Q1 2026 from 5.2% a year earlier, the compounding value of a forced Roth bucket over 15 to 25 years can outrun the upfront tax hit. The losers are workers one or two years from retirement in a high-tax state who planned to draw down in a low-tax state. For them, the lost deduction is a real check to the government.
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