The Roth Catch-Up Mandate Is Live: What High Earners Over 50 Lost in 2026
Looking ahead to 2027. The $150,000 FICA-wage threshold that triggers this mandate is projected to rise to $155,000 — which would move some people back below the line for a year. Projected, not official: the IRS publishes the real figures in late October or early November. The 2027 numbers and which two are still undecided.
If you are over 50, earning well, and stuffing the maximum into a 401(k) to compress your last few working years, something changed on January 1, 2026 that you may not have noticed until you looked at a pay stub.
Your catch-up contribution is no longer a pretax deduction. For high earners it now has to go in as Roth — after-tax — which means the deduction you were counting on this year is gone.
This is a SECURE 2.0 provision that was delayed twice and has now actually arrived. Here is exactly who it hits, what it costs, and the handful of planning moves still available.
The Rule, Precisely
Beginning in 2026, if your prior-year FICA (Social Security) wages from the employer sponsoring your plan exceeded $150,000, your age-based catch-up contributions must be made as Roth contributions rather than pretax.
Four details in that sentence do a lot of work:
"Prior-year." Your 2026 treatment is determined by your 2025 wages. You cannot fix 2026 by earning less this year — that only affects 2027.
"FICA wages." Not total compensation, not AGI, not household income. Social Security wages as reported by that employer.
"From the employer sponsoring the plan." This is the most misunderstood part. The test is per-employer, not per-person. Someone earning $100,000 at each of two jobs has $200,000 of income and may be under the threshold at both plans.
"$150,000." This figure was raised from the originally legislated $145,000 by inflation adjustment. It continues to be indexed, so expect it to drift upward.
The threshold also creates a genuinely odd cliff: at $149,999 in prior-year wages you keep the pretax choice; a dollar more and you lose it entirely for the year.
What It Actually Costs You
The 2026 numbers:
| Amount | |
|---|---|
| Base 401(k) elective deferral | $24,500 |
| Age 50+ catch-up | $8,000 (total $32,500) |
| Ages 60–63 "super" catch-up | $11,250 (total $35,750) |
If you are 50 or older and over the wage threshold, the $8,000 that used to reduce your taxable income no longer does. At a 32% marginal rate that is roughly $2,560 of additional tax this year. In the 60–63 band, $11,250 at 32% is about $3,600.
That is the honest cost, and it is not enormous. But it lands in precisely the years when a FIRE saver's marginal rate is at its lifetime peak, which is the worst time to be pushed out of a deduction and into after-tax contributions.
The Counterargument Worth Taking Seriously
Before treating this purely as a loss: for a meaningful subset of early retirees, forced Roth is not actually the wrong outcome.
The reason is the Roth conversion ladder. A FIRE plan typically involves years of deliberately low taxable income after quitting, during which you convert pretax money to Roth at low rates. Those low-income years are a scarce resource — they are also what you use to control ACA subsidy eligibility. Every extra dollar sitting in pretax accounts is a dollar competing for that limited conversion runway.
Money that goes in as Roth today never needs to be converted, never shows up in your conversion-year income, never inflates a future RMD, and never interacts with your subsidy calculation. If your pretax balance is already large relative to your Roth and taxable balances, being forced into Roth is closer to a rebalancing than a penalty.
The people genuinely worse off are those with a short runway to retirement, a high current marginal rate, and an expectation of a much lower rate in retirement — the classic case where pretax wins outright.
The Trap: Plans Without a Roth Option
This is the part to act on, and the part with a real deadline.
The mandate says the catch-up money must be Roth. If your employer's 401(k) does not offer a Roth option, there may be nowhere for that contribution to go — and affected high earners can find themselves unable to make catch-up contributions at all.
Most large plans added Roth long ago. Smaller plans, and some older 403(b) and governmental arrangements, did not. If you have not verified it, do that now rather than in December:
- Confirm your plan offers Roth deferrals.
- Confirm the plan is applying the catch-up rule and how it is classifying you.
- Check your year-to-date contributions to see whether catch-up dollars have been going in — and in what tax bucket.
Discovering in late December that your catch-up never happened is not recoverable. The contribution limit is annual and does not carry forward.
Who Is Not Affected
Anyone under the wage threshold. The majority of participants. You keep the pretax choice.
Anyone under 50. Catch-up contributions do not exist for you yet.
People whose prior-year FICA wages from that specific employer were low or zero — including someone who changed jobs and has no prior-year wages from the new employer. Because the test looks backward at wages from the sponsoring employer, a first year at a new employer generally falls outside it. Confirm with the plan rather than assuming.
Self-employment income is not FICA wages. A sole proprietor or partner paying self-employment tax on net earnings does not have FICA wages from a sponsoring employer in the way the rule contemplates. This gets genuinely technical once an S-corp is paying you W-2 wages, which is a different situation — the self-employed FIRE guide covers the account structures, but this specific question is worth asking a CPA rather than a blog.
IRA catch-up contributions are untouched. The IRA limit is $7,500 with a $1,100 catch-up for 2026, and the Roth mandate does not reach them.
What To Do Now
Find your 2025 FICA wages. Box 3 of your 2025 W-2. That single number determines your 2026 treatment. If you are near the line, it is worth knowing which side you are on rather than guessing.
If you are affected, do not reduce your contribution. The most common wrong reaction is to cut catch-up contributions because "the deduction is gone." Roth space is the most valuable space in the system — no RMDs, tax-free growth, no future conversion needed. Losing $2,560 of deduction is not a reason to give up $8,000 of permanently tax-free compounding.
Rebalance the tax location of everything else. If your catch-up is now forced Roth, the rest of your portfolio's placement should adapt around it — which asset goes in which account changes when your account mix changes. That logic is in asset location for tax-efficient accounts.
Check whether you have better after-tax capacity elsewhere. If your plan allows after-tax contributions with in-plan conversion, the mega backdoor Roth moves far more money than the catch-up ever did, and the mandate does not change it. The backdoor Roth IRA remains available regardless of income.
Do not neglect the HSA. It is the only account that is pretax going in and tax-free coming out for qualified expenses, and nothing in SECURE 2.0 touched it — see the HSA FIRE strategy.
The Bottom Line
If your 2025 FICA wages from your employer topped $150,000 and you are 50 or older, your 2026 catch-up is Roth whether you like it or not. The cash cost is a few thousand dollars of lost deduction. The real risk is not the tax — it is the plan that does not offer Roth and quietly stops your catch-up contributions altogether.
Pull up Box 3 of your 2025 W-2, call your plan administrator, and confirm the money is actually going somewhere. That is a fifteen-minute task that is worth doing before December.
This is general information, not tax advice. The interaction between the wage threshold, multiple employers, and S-corp compensation gets genuinely complicated — talk to a CPA about your specific situation.