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IRS Finalizes Roth-Only 401(k) Catch-Ups for High Earners With 2026 Transition, 2027 Start

The rule targets employees 50+ with prior-year wages above an IRS threshold, moving their catch-ups to Roth accounts.

Overview

  • Plans may adopt the change in 2026 under a reasonable, good-faith approach, and the requirement formally takes effect in 2027, according to the IRS.
  • The IRS’s latest guidance sets the wage threshold for the Roth catch-up test at $150,000 for the 2025 lookback year, up from $145,000 previously cited.
  • For 2026, the elective deferral limit rises to $24,500 and the standard catch-up limit increases to $8,000, with a $11,250 catch-up cap for ages 60–63.
  • Workers over the threshold whose plans lack a Roth option will be unable to make catch-up contributions, though roughly 93% of plans offer Roth features.
  • The shift trades an upfront tax bill for the potential of tax-free growth and withdrawals on these additional contributions in retirement.