One of the most consequential provisions of the SECURE 2.0 Act took effect this January, and many high earners are only now seeing it appear on their pay stubs. As of January 1, 2026, workers age 50 or older who earned more than $150,000 in FICA wages during 2025 must make any 401(k) catch-up contributions on a Roth (after-tax) basis. Pre-tax catch-ups for this group are no longer an option.
It's a permanent, structural shift in how high earners save for retirement — and it interacts with this year's broader contribution-limit increases in ways worth understanding before year-end planning gets underway.
The New Numbers for 2026
The IRS lifted several retirement limits for 2026, with two changes carrying the most weight for older savers:
- 401(k) elective deferral limit: $24,500, up from $23,500 in 2025.
- Standard catch-up (ages 50–59 and 64+): $8,000.
- "Super" catch-up (ages 60–63): $11,250, an enhanced limit that remains in force.
- IRA contribution limit: $7,500, with a catch-up of $1,100 for those 50+ (the first IRA catch-up increase since 2006, now indexed to inflation under SECURE 2.0).
For a high earner who turns 60 in 2026 and maxes everything, total 401(k) plus IRA savings could reach $43,250 — but the catch-up portion now flows into a Roth bucket rather than a pre-tax one.
Who the $150,000 Threshold Actually Captures
The rule applies to anyone age 50 or older by December 31 whose prior-year FICA wages from the employer sponsoring the plan exceeded $150,000. A few details that often trip people up:
- The test uses W-2 FICA wages, not adjusted gross income, and not household income.
- It's based on the 2025 W-2 from your current employer. If you switched jobs or your prior employer didn't pay you above the threshold, the mandate may not apply in 2026 even if you're a high earner overall.
- Self-employed individuals reporting only Schedule C income (no FICA wages from an employer plan) are not subject to the Roth requirement.
The $150,000 figure is set to be indexed for inflation in future years.
What This Changes — and What It Doesn't
The mechanics of the catch-up don't change: the same dollar amounts apply. What changes is the tax treatment. Pre-tax catch-ups reduce current taxable income; Roth catch-ups don't, but qualified withdrawals in retirement come out tax-free.
For high earners in the 32%, 35%, or 37% brackets, that's a real cash-flow hit today. A $8,000 catch-up that used to shave roughly $2,800 off a federal tax bill in the 35% bracket now provides no current-year deduction. The trade-off is a tax-free pool in retirement that's not subject to required minimum distributions during the account holder's lifetime.
Practical Steps Before Year-End
- Confirm your plan offers Roth. Plans that don't accept Roth deferrals must either add them or shut off catch-ups entirely for affected employees. Check with your benefits team if your contributions stopped without explanation.
- Re-run your withholding. Losing the catch-up deduction can push some households into underpayment territory. Update W-4 elections or estimated payments accordingly.
- Coordinate with Roth conversions. If you were already planning bracket-filling conversions, the forced Roth catch-up adds tax-free space without using up bracket room. That can free conversion capacity for traditional IRA balances.
- Reconsider HSA priority. With the catch-up's tax shield gone, the HSA's triple tax advantage often becomes the most efficient marginal dollar for eligible high earners.
- Diversify beyond the tax wrapper. A Roth-heavy retirement bucket still carries market risk. Many high-net-worth retirees pair tax diversification with asset diversification — including allocations to Treasury Inflation-Protected Securities, I Bonds, and precious metals — to hedge against both tax-policy and inflation shocks.
The mandatory Roth rule isn't a tax increase in disguise so much as a forced shift in timing. For disciplined high earners with long horizons, the lifetime arithmetic often still works in their favor. But the year you lose the deduction is real, and 2026 is that year.
Sources: IRS, Fidelity, Charles Schwab, Quarles Law Firm, Franklin Templeton