The IRS and Treasury finalized Secure 2.0 rules on catch-up contributions for 401(k) and similar plans, which apply to workers age 50 and older. Beginning in 2027, those earning more than $145,000 from their current employer must make catch-up contributions on a Roth (after-tax) basis, though some plans may implement the change as early as 2026. 

Until then, investors can still choose between pretax and Roth contributions if their plan allows. Experts say now is the time to work with advisors to run multi-year tax projections to determine whether to accelerate pretax contributions before the rule takes effect or embrace Roth sooner.

For 2025, contribution limits rise to $23,500 with an additional $7,500 catch-up for those 50+, and workers ages 60–63 can make a “super catch-up” of $11,250. 

Finsum: The key takeaway, according to advisors, is not to sit on the sidelines as the new rules approach, but instead actively plan for the transition.