"Starting January 1, 2026, the rules change for anyone earning more than $150,000 in 2025. Every dollar you allocate in catch-up contributions has to go into the Roth side (not pretax) of your 401(k). This single curveball wipes out the upfront tax break you used to get on those catch-ups, which can easily add a few thousand dollars to your 2026 tax bill.... If you were counting on that catch-up deduction to keep your taxes in check, it's time to rethink the plan."  MORE >>