If you're 50 or older, earn a good salary, and make catch-up contributions to your 401(k), a rule that has been on the calendar since 2022 finally arrived on January 1, 2026. Your catch-up contributions may now be required to go into a Roth account — after-tax — whether you asked for that or not.
This is the biggest change to how higher earners save for retirement in years, and most of the coverage has treated it as either a disaster or a footnote. It's neither. Here's what actually changed, who it catches, what it costs, and what it quietly gives you in return.
What changed on January 1
The SECURE 2.0 Act, passed at the end of 2022, included a provision that kept getting delayed: catch-up contributions from higher earners must be made as Roth contributions. The IRS published final regulations on September 16, 2025, and the rule took effect for the 2026 plan year.
The test is simple to state. If your FICA wages from your employer were more than $150,000 in 2025, every catch-up dollar you contribute to that employer's 401(k), 403(b), or governmental 457(b) in 2026 must be a Roth contribution. No pre-tax option. Your regular contributions — the first $24,500 — are unaffected. You can still make those pre-tax, Roth, or any mix your plan allows.
Three details in that sentence do a lot of work.
It's last year's wages, from that employer. The threshold looks at 2025 FICA wages — the Social Security wage figure your employer reported — not your 2026 salary, and not your household income. It's also a single-employer test. If you changed jobs and joined your current employer this year, you have no prior-year wages from them, so the rule doesn't reach you in 2026.
The threshold moved. The law set it at $145,000, indexed for inflation. For 2026, the IRS set the line at $150,000 of 2025 wages. Expect it to keep drifting upward.
It only touches catch-ups. This rule applies to workplace plans — 401(k), 403(b), governmental 457(b). Your IRA is a separate world with its own rules.
The 2026 numbers
The contribution limits rose for 2026, so here's the full picture:
- Employee deferral limit: $24,500, up from $23,500 in 2025.
- Catch-up (age 50 and up): $8,000, up from $7,500.
- Higher catch-up (ages 60–63): $11,250, unchanged. If you turn 60, 61, 62, or 63 during 2026, this larger amount replaces the $8,000 — and yes, if you're over the wage line, all $11,250 must be Roth.
- IRA limit: $7,500, up from $7,000, with an $1,100 catch-up for age 50 and up.
Put together: a 55-year-old can put $32,500 into a 401(k) in 2026. A 61-year-old can put in $35,750. Those are meaningful numbers for anyone playing catch-up on retirement — which, in our experience, describes a lot of thoughtful people who spent their 30s and 40s paying for other things.
What the rule costs you
The pre-tax deduction on your catch-up is gone if you're over the line. That has a real, calculable price.
Say you're in the 24% federal bracket and contribute the full $8,000 catch-up. As a pre-tax contribution, it would have reduced this year's federal tax by $1,920. As a Roth contribution, it doesn't. In the 32% bracket, the difference is $2,560. State income tax widens the gap further in most states. That's the cost, and it lands in your 2026 withholding — worth checking now, not in April.
What you get instead
Here's the part the disaster framing misses: Roth dollars are not lesser dollars. They're differently shaped dollars, and for a lot of people in their 50s and early 60s the shape is favorable.
Tax-free growth, permanently. Every dollar of growth on a Roth catch-up comes out untaxed in retirement. Ten or fifteen years of compounding on eight thousand dollars a year is not a small amount of tax-free money.
No RMDs. Since 2024, Roth accounts in a 401(k) no longer have required minimum distributions during your lifetime. Pre-tax balances do — starting at age 73, or 75 if you were born in 1960 or later. Money the IRS can't force out on a schedule is money you control.
A hedge on future rates. Every pre-tax dollar you save is a bet that your tax rate in retirement will be lower than it is today. For high savers with large pre-tax balances, that bet gets shakier every year — RMDs alone can push retirement income into surprisingly high brackets. Roth catch-ups diversify the bet.
Whether the trade is good for you depends on the gap between your bracket today and your bracket in retirement — and your retirement bracket depends on your pre-tax balance, your Social Security timing, your state, and when RMDs start. Couples who saved diligently in pre-tax accounts for thirty years are often surprised to find that RMDs stacked on two Social Security checks land them in brackets close to their working years — exactly the situation where a decade of Roth catch-ups would have helped. That's not a rule of thumb calculation. It's a forecast.
Five things to do before December 31
1. Confirm your plan offers Roth catch-ups. This is the one that bites. Under the final regulations, if your plan has no Roth option, affected high earners can't make catch-up contributions at all until it adds one. Most large plans have added Roth; some smaller ones haven't. One question to HR settles it.
2. Check your 2025 W-2, Box 3. That's the wage figure the test uses. If you were over $150,000, expect your plan to flip your catch-ups to Roth — many will do it automatically through what the regulations call a "deemed Roth election." That's the plan treating your existing catch-up election as a Roth election on your behalf, so your contributions keep flowing instead of stopping at the deferral limit. You can generally opt out, but understand what opting out means: no catch-up at all, not a pre-tax one. For most people, staying in is the right call.
3. Adjust your withholding if you're affected. The catch-up no longer reduces your taxable income. If your withholding assumed it did, fix that now so April doesn't surprise you.
4. If you're 60 to 63, take the $11,250 seriously. The higher catch-up window lasts exactly four calendar years, then drops back to the regular amount at 64. It's a short window that most people don't know exists.
5. Model the long game. The question underneath all of this — how do Roth contributions now change your taxes, your RMDs, and how long your money lasts — has a precise answer, but only if you run it. Tally's lifetime forecast models your federal and state taxes year by year, including RMDs under the SECURE 2.0 ages and Roth conversion analysis, so you can see what a decade of Roth catch-ups does to your runway before you commit to anything.
The honest summary
If you earned over $150,000 last year, Congress took away a choice you used to have, and it will cost you a real deduction — roughly $1,900 to $2,600 a year in federal tax for most affected savers. You didn't choose it. But the thing you're being pushed into is the thing many planners would have told a high saver in their 50s to consider anyway: building a pool of tax-free money in the years before RMDs arrive.
The rule is mandatory. Understanding what it does to your particular retirement is optional — but it shouldn't be.
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