401(k) catch-up contributions can be pre-tax, but only if you’re eligible to choose. For 2026 and later years, participants whose FICA wages from the plan-sponsoring employer exceeded $150,000 in the prior calendar year must make catch-up contributions on a Roth (after-tax) basis. Everyone else keeps the same choice they have for regular deferrals: pre-tax, Roth, or a split between the two, provided the plan offers both.
The High-Earner Roth Mandate Starting in 2026
The SECURE 2.0 Act eliminated the pre-tax catch-up option for higher-paid workers. If your Social Security wages (Box 3 of your W-2) from the employer sponsoring the 401(k) topped $150,000 the year before, every catch-up dollar you defer has to go into a Roth account.1Internal Revenue Service. Treasury, IRS Issue Final Regulations on New Roth Catch-Up Rule, Other SECURE 2.0 Act Provisions For catch-ups made in 2026, the IRS looks at your 2025 wages. The $150,000 threshold is indexed for inflation going forward.2Internal Revenue Service. Notice 2025-67, 2026 Amounts Relating to Retirement Plans and IRAs
The rule was originally scheduled to take effect in 2024, but the IRS granted a two-year administrative transition period through Notice 2023-62 so plans could get their systems in place. That transition ends December 31, 2025, and the mandate applies in full for the 2026 tax year.3Internal Revenue Service. Notice 2023-62 – Guidance on Section 603 of the SECURE 2.0 Act with Respect to Catch-Up Contributions
The wage test is employer-specific. It looks at wages from the employer sponsoring the plan, not your total household or combined income. If you changed jobs mid-year or your spouse earns separately, the threshold is measured against what that one employer paid you in the prior year.
When You Still Get to Choose Pre-Tax
If your prior-year FICA wages from your employer were $150,000 or less, the mandate doesn’t apply to you. Your catch-up contributions follow the same rules as your regular deferrals: pre-tax if your plan offers a traditional 401(k), Roth if you prefer after-tax treatment, or any split between the two.
Pre-tax catch-ups reduce the wages reported in Box 1 of your W-2, lowering your federal income tax in the year of the contribution.4Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3 You’ll owe ordinary income tax on the money, and on its growth, when you take it out in retirement.
Roth catch-ups come out of your paycheck after tax. There’s no current-year deduction, but qualified withdrawals in retirement, including all investment earnings, are tax-free.
State tax usually tracks the federal treatment for pre-tax deferrals, but not everywhere. A few states limit or disallow the deduction, and several have no income tax at all, so a pre-tax contribution that reduces your federal bill may or may not reduce your state bill.
Which Choice Saves More
The comparison comes down to your tax rate now versus your expected rate in retirement. Pre-tax tends to win if you expect your bracket to drop after you stop working, because the deduction today is worth more than the tax you’ll pay later. Roth tends to favor participants who expect their rate to hold steady or rise, and younger catch-up-eligible workers who have more years for tax-free growth to compound.
Neither version gets special protection from early-withdrawal rules. Distributions before age 59½ are generally subject to ordinary income tax plus a 10% additional tax, with the usual exceptions for disability, substantially equal periodic payments, and separation from service after age 55, among others. Those exceptions apply to catch-up dollars the same way they apply to regular deferrals.5Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
Who Qualifies and How Much for 2026
You can make catch-up contributions if you turn 50 or older by December 31 of the contribution year, and your plan document allows them. Not every 401(k) does, so confirm with your plan administrator. The full-year rule matters: if you turn 50 in November 2026, you can start catch-ups in January 2026.6Internal Revenue Service. Retirement Topics – 401(k) and Profit-Sharing Plan Contribution Limits
The 2026 numbers:
- Standard deferral limit: $24,500
- Age 50–59 and 64+ catch-up: $8,000, for a total of $32,500
- Age 60–63 enhanced catch-up: $11,250, for a total of $35,750
The enhanced catch-up for ages 60 through 63 was added by SECURE 2.0.7Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Employers aren’t required to adopt it, so a plan may cap you at $8,000 even in that age band.
If Your Plan Has No Roth Option
This is the trap the 2026 rule creates for high earners. If you’re subject to the mandate and your employer’s 401(k) doesn’t offer a Roth feature, you cannot make catch-up contributions at all. The regulation doesn’t carve out an exception that pushes you back to pre-tax; it either routes you into Roth or blocks the catch-up. Ask your HR or benefits team whether a Roth option is available, because without one you lose $8,000 or more in annual retirement savings capacity.