SECURE Act 2.0’s Roth Catch-Up Contribution Rule: What High Earners Need to Know
Beginning January 1, 2026, a significant change under the SECURE 2.0 Act reshapes how higher-income employees can make catch-up contributions to their 401(k), 403(b), or governmental 457(b) plans. Under Section 603 of the Act, participants age 50 or older whose prior-year wages exceeded a specified threshold must now make their catch-up contributions on a Roth (after-tax) basis rather than pre-tax. This shift affects millions of workers who contribute to these plans and requires both individuals and plan sponsors to rethink their approach to retirement contributions.
The Core Rule
Catch-up contributions are the additional amounts that employees age 50 and older are permitted to contribute to their workplace retirement plan beyond the standard annual deferral limit. Historically, participants could choose whether to make these contributions pre-tax or Roth. Under the new rule, that choice disappears for higher earners: anyone whose FICA wages (as reported in Box 3 of Form W-2) from the employer sponsoring the plan exceeded the applicable threshold in the prior calendar year must now direct all catch-up contributions into a Roth account within the plan.
The statutory threshold is $145,000, set with a base period beginning July 1, 2023, and it is adjusted annually for cost-of-living increases in $5,000 increments. For 2026, the operative threshold is $150,000. In other words, if an employee earned more than $150,000 in FICA wages from their employer in 2025, any catch-up contributions made in 2026 must be Roth.
Employees earning below the threshold retain the flexibility to choose between pre-tax and Roth catch-up contributions, as before.
Who Is Affected — and Who Isn't
The rule applies specifically to FICA wages from the employer maintaining the plan, not total income from all sources. This creates some notable nuances:
Individuals with no FICA wages, such as partners or sole proprietors with only self-employment income, and certain state or local government employees, are not subject to the rule, regardless of how much they earn.
Wages from separate employers are generally not combined, even if both employers participate in the same retirement plan, unless they share a common paymaster or are treated as a single employer for reporting purposes.
The rule applies to regular age-50 catch-up contributions as well as the enhanced "super catch-up" contributions available to employees ages 60 through 63 (a separate SECURE 2.0 provision that allows higher catch-up limits for that age group).
Notably, if a plan does not offer a Roth contribution feature at all, higher-income employees subject to this rule will be unable to make any catch-up contributions — pre-tax or Roth — starting in 2026. This has pushed many plan sponsors that previously offered only pre-tax deferrals to add Roth features to avoid excluding affected employees from catch-up savings altogether.
Practical and Tax Implications
The practical effect is straightforward but consequential: catch-up contributions for higher earners will now be taxed in the year they are made, rather than deferred until withdrawal. For example, an employee earning $160,000 who contributes the maximum catch-up amount will owe income tax on that contribution upfront, increasing their current tax liability but allowing the funds to grow and eventually be withdrawn tax-free in retirement (assuming plan and distribution requirements are met). This also means Roth catch-up amounts are not subject to Required Minimum Distributions during the original account holder's lifetime, which can be a meaningful long-term planning advantage.
For payroll and cash-flow purposes, employees near the wage threshold should also be aware that timing of bonuses, commissions, or other compensation could push them above or below the limit from year to year, changing their catch-up tax treatment annually.
Compliance Timeline
While the statutory requirement technically took effect January 1, 2026, the IRS's final regulations — issued in September 2025 — allow plan sponsors to rely on a "reasonable, good faith interpretation" of the rule through the end of 2026. Full compliance with the detailed final regulations is required for plan years beginning after December 31, 2026. Plan sponsors generally must adopt formal plan amendments reflecting these changes by December 31, 2026, with later deadlines available for collectively bargained and governmental plans.
The Bottom Line
For higher-income employees nearing or past age 50, this rule represents a meaningful shift in how catch-up savings will be taxed going forward. Reviewing current contribution elections, confirming that an employer's plan offers a Roth option, and factoring the upfront tax cost into broader retirement and cash-flow planning are all worthwhile steps as this rule takes full effect.