Earn Over $150,000? Your 401(k) Catch-Up Contributions Are Now Roth-Only

If you're 50 or older and earn a higher income, a rule from the SECURE 2.0 Act changed how your 401(k) catch-up contributions work in 2026: they can no longer go in pre-tax. They must be designated Roth contributions — taxed now, tax-free later. Treasury and the IRS finalized the regulations implementing this requirement in late 2025 (IRS, "Treasury, IRS issue final regulations on new Roth catch-up rule"). Here's what it means in practice.

Who does the Roth-only catch-up rule apply to?

The rule applies to participants in 401(k), 403(b), and governmental 457(b) plans who are age 50 or older and whose Social Security (FICA) wages from the employer sponsoring the plan exceeded $150,000 in the prior year. For 2026, that means your 2025 wages — the figure in Box 3 of your W-2 from that employer (IRS, catch-up contribution rules). The threshold is indexed for inflation in future years.

Two details in that test matter more than they appear:

• Only wages from the employer sponsoring your plan count. If you changed jobs, your new employer looks only at what it paid you last year — a new hire with no prior-year wages from that employer isn't subject to the rule for that year.
• The test uses FICA wages, not taxable income. Self-employed individuals with no W-2 wages (for example, partners with only self-employment earnings) are generally not subject to the requirement.

Whether the rule applies to you depends on your specific wage history and plan — your plan administrator can confirm your status.

How much are catch-up contributions in 2026?

For 2026, the employee deferral limit is $24,500, the standard catch-up for those 50 and older is $8,000, and the "super catch-up" for those ages 60–63 is $11,250 (IRS, 2026 limits announcement). We covered all of the 2026 figures in our contribution limits guide.

The Roth-only requirement applies just to the catch-up portion. Your first $24,500 of deferrals can still be pre-tax, Roth, or a mix — whatever your plan allows and you elect.

What if my plan doesn't offer a Roth option?

This is the sharp edge of the rule: if your plan has no Roth feature, affected higher earners cannot make catch-up contributions at all. The plan isn't required to add a Roth option, though many employers have done so ahead of 2026. If you're in this situation, it's worth asking your employer whether a Roth feature is coming.

Plans may also use a "deemed election" — automatically treating your catch-up dollars as Roth once you cross the threshold, with the ability to opt out (by stopping catch-ups, not by making them pre-tax).

Is Roth treatment actually bad for you?

Losing the up-front deduction stings, but the answer depends on your situation. Roth dollars grow tax-free, come out tax-free in retirement, and aren't subject to required minimum distributions during your lifetime. For someone who expects similar or higher tax rates in retirement — or who wants to reduce future RMD pressure — building Roth assets can fit naturally into a broader plan, alongside strategies like the ones in our Roth conversion guide.

What the rule does change is your current-year tax math: those catch-up dollars no longer reduce this year's taxable income. If you counted on that deduction, mid-year is a good time to revisit your withholding — our mid-year tax checkup walks through how.

A note on timing: The IRS requires good-faith compliance with the rule in 2026, with full compliance under the final regulations required for plan years beginning in 2027. Plans are updating payroll systems now, so don't be surprised if your provider reclassifies your catch-up election this year.

The bottom line

If you're 50 or older and your 2025 W-2 Box 3 wages from your employer topped $150,000, expect your 2026 catch-up contributions to be Roth — and confirm your plan offers a Roth option so you don't lose the catch-up entirely. Whether that shift helps or hurts over a lifetime depends on your current bracket, your expected retirement income, and your estate goals, so it's worth reviewing in the context of your full plan.