Irs 401k Limits 2025. Key changes for 2025 retirement plan contribution limits 401(k), 403(b), 457. For 2025, employees can now contribute up to $23,500 to a 401 (k) or 403 (b).

In 2025, workers can place $23,500, up $500 from 2024, into their 401(k) and. For tax year 2025, employees can defer $23,500 into their 401 (k) and iras, a.