The biggest structural change to U.S. workplace retirement plans in nearly a decade is now live. Beginning January 1, 2026, the long-delayed mandatory Roth catch-up provision under the SECURE 2.0 Act is in effect — and for higher-paid workers nearing retirement, it changes the math on every additional dollar they try to defer.
Under the new rule, employees age 50 or older whose prior-year FICA wages from their current employer exceeded $150,000 can no longer make traditional pretax catch-up contributions to a 401(k), 403(b) or governmental 457(b) plan. Those extra dollars must now be routed into a Roth account, meaning they are taxed as ordinary income in the year of contribution.
The Numbers That Matter for 2026
The IRS has already locked in the contribution architecture sitting on top of the new rule. For 2026, the standard 401(k) elective deferral limit rises to $24,500, up from $23,500 in 2025. Workers 50 and older can layer on an $8,000 catch-up, pushing their total to $32,500.
A separate, larger "super catch-up" tier created by SECURE 2.0 lets workers ages 60 to 63 contribute up to $11,250 in catch-up dollars instead of $8,000, raising their plan ceiling to $35,750 if the employer's plan adopts the provision. The IRA contribution limit also rises in 2026 to $7,500.
For high earners, the Roth requirement reshapes how much of that capacity will hit the plan as after-tax money. A 55-year-old making $200,000 who maxes out at $32,500 will see $24,500 enter as pretax salary deferrals as before — but the $8,000 catch-up now lands in a Roth bucket, with no current-year deduction.
Why the Wage Test Surprises Some Workers
The $150,000 trigger looks at FICA-taxable wages from the participant's current employer in the prior calendar year. Earnings from other employers are not combined, and self-employment income, which is not subject to FICA in the same way, generally falls outside the test. That means a worker who switches jobs midyear may not meet the threshold at the new employer in 2026, even if total compensation is well above $150,000.
The wage figure is also not indexed at $150,000 going forward — it will adjust for inflation in future years, according to IRS guidance, but the 2026 dollar trigger is fixed.
Compliance Window: Good-Faith in 2026, Hard Rule in 2027
The IRS issued final regulations in September 2025 that are formally effective starting in 2027. For 2026, plans are expected to operate in "reasonable, good-faith" compliance with the statute. In practice, that means employers should have payroll systems and recordkeepers capable of identifying affected employees, defaulting their catch-up contributions to a Roth source, and offering a "deemed Roth election" mechanism for plans that did not previously have a Roth feature.
Multiemployer union plans received a narrow delay, but the vast majority of single-employer 401(k) and 403(b) plans are expected to be operational on the rule this year.
What Sponsors and Savers Are Doing About It
For plan sponsors, the immediate task is administrative. Plans that did not previously permit Roth contributions must add the feature to remain compliant, since high earners cannot be shut out of catch-ups entirely. Recordkeeping systems also need to flag affected participants each year based on prior-year W-2 wages.
For savers, the rule effectively raises the current-year tax cost of maxing out a 401(k) for workers over 50 making more than $150,000 — but it builds a larger pool of tax-free retirement income for later. Fidelity and other recordkeepers have begun urging affected participants to model the trade-off, particularly those who expect their retirement tax bracket to be lower than their current one.
The Roth catch-up rule is the most visible piece of SECURE 2.0 to hit savers this year, but it is not the last. Mandatory automatic enrollment in newly established 401(k) and 403(b) plans, expanded matching on student-loan payments, and new emergency savings accounts inside workplace plans are all phasing in alongside it — a steady reshaping of the retirement savings system that began with the original SECURE Act in 2019.
Sources: Internal Revenue Service, "401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500"; Fidelity, "Understanding new Roth 401(k) catch-up rules"; Franklin Templeton, "SECURE 2.0 update: Mandatory Roth catch-up contributions arrive in 2026"; CAPTRUST, "Mandatory Roth Catch-Up Q&A"; Manulife John Hancock Retirement, "SECURE 2.0's new Roth catch-up contribution rule."