If you’re 50 or older and stuffing extra money into your 401(k) every year, 2026 changed the rules on you. For higher earners, those catch-up contributions can no longer go in pre-tax. They have to be Roth, meaning you pay the tax now and the money grows tax-free from there.

Whether that’s a raw deal or a quiet gift depends on your situation, and the rule catches fewer people than the headlines suggest. Here’s who it actually covers, what the 2026 numbers are, and what to check on your next pay stub.

First, the 2026 numbers

The basics, straight from the IRS’s annual cost-of-living update: the standard employee contribution limit for 401(k), 403(b) and most 457 plans is $24,500 for 2026. If you’re 50 or older, you can add a catch-up contribution of $8,000 on top, for a total of $32,500.

There’s a wrinkle for people aged 60 through 63. Under the SECURE 2.0 law, those four birthdays come with a higher catch-up limit, which is $11,250 for 2026 per IRS Notice 2025-67, instead of $8,000. At 64 you drop back to the regular catch-up amount.

IRAs run on a separate track: a $7,500 annual limit for 2026, plus a $1,100 catch-up for savers 50 and older. Hold that thought, because IRAs matter to the story below in one specific way.

What changed in 2026

SECURE 2.0, passed back in 2022, included a provision that took effect this year after the IRS gave everyone a two-year grace period to get payroll systems ready. The rule: if your Social Security wages from your employer were above a set threshold in the prior year, any catch-up contributions you make to that employer’s plan must be designated Roth contributions.

For 2026, the test is whether your 2025 FICA wages from that employer topped $150,000, a threshold the IRS set in Notice 2025-67 (it started at $145,000 in the law and is indexed for inflation). Earn under that line and nothing changes: you can keep making catch-ups pre-tax, Roth, or a mix, whatever your plan allows.

Note the fine print, because it decides real cases. The test looks at last year’s wages, not this year’s. It looks at wages from the employer sponsoring the plan, so if you switched jobs in January, your new employer’s plan generally isn’t counting what your old employer paid you. And it only touches the catch-up layer. Your first $24,500 can stay pre-tax no matter how much you earn.

What Roth actually does to your paycheck

A pre-tax catch-up reduces your taxable income today. A Roth catch-up doesn’t. So a 55-year-old in the 32 percent bracket who puts in the full $8,000 catch-up will owe roughly $2,560 more in current-year tax than she would have under the old treatment. That’s the sting, and it’s why Congress wrote the rule this way: it pulls tax revenue forward.

The other side of the ledger is genuinely valuable, though. Roth money grows tax-free, comes out tax-free in retirement once you meet the age and five-year requirements, and Roth accounts in a 401(k) are no longer subject to required minimum distributions during your lifetime, a separate SECURE 2.0 change that took effect in 2024. If you expect your tax rate in retirement to be close to or higher than today’s, being forced into Roth may cost you little or nothing over a lifetime. If you’re in your peak-earning years now and expect a much lower bracket later, it’s a real cost, just not one you can opt out of.

If your plan has no Roth option

Here’s the trap nobody enjoys explaining at the HR desk: the law doesn’t force your employer to add a Roth feature. But if the plan doesn’t offer one, employees over the wage threshold simply can’t make catch-up contributions at all. Not pre-tax, not anything. The choice for affected workers becomes Roth or nothing, and the plan has to have Roth on the menu for “Roth” to be possible.

Most large plans added Roth years ago, and the IRS finalized the regulations for this rule in September 2025, so plans have had time to prepare. But if you work for a smaller employer, it’s worth a two-minute call to confirm your plan offers designated Roth contributions before you count on making a catch-up this year. If it doesn’t, ask whether it will. You won’t be the only one asking.

Who escapes the rule entirely

A few groups can relax:

Anyone under the wage line. If your 2025 Social Security wages from your employer were $150,000 or less, 2026 catch-ups work the way they always have.

IRA savers. The mandate applies to workplace plans, not IRAs. Traditional IRA catch-up contributions are untouched, though whether you can deduct them depends on the usual income rules.

The self-employed without wages. The test runs on FICA wages. Partners and sole proprietors whose earnings are self-employment income rather than W-2 wages generally aren’t captured by it, even with high incomes.

New hires. No prior-year wages from the sponsoring employer generally means no Roth mandate in your first year, regardless of what you earned elsewhere.

What to do this year

Check three things. First, look at Box 3 of your 2025 W-2, your Social Security wages, to see which side of $150,000 you’re on. Second, log into your 401(k) portal and confirm how your catch-up dollars are being coded; some plans are automatically flipping affected employees’ catch-ups to Roth, and you want no surprises at tax time. Third, if you’re newly forced into Roth, revisit your withholding, since you’ve lost a deduction you may have been counting on.

And if you’re in the 60-to-63 window, remember the bigger $11,250 catch-up. Forced Roth or not, that’s the largest amount of tax-advantaged space many workers will ever have in a single year. Use it if you can.

This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.