Under SECURE 2.0 §603, beginning January 1, 2026 (as extended by IRS Notice 2023-62 and finalized guidance), age-50 catch-up contributions made to a 401(k), 403(b), or governmental 457(b) plan by participants with prior-year FICA wages above $145,000 (indexed) from the same employer must be designated as:
- ARoth contributions
- BPre-tax contributions
- CAfter-tax non-Roth contributions
- DEmployer matching contributions