Max 401k Contribution 2025 Over 50 Benefits. This dollar amount is the same as in 2023. For 2025, a 401 (k) participant filing single can contribute up to $23,000 (up from $22,500 in 2023).
Of note, the 2025 pretax limit that applies to elective deferrals to irc section 401(k), 403(b) and 457(b) plans increased from $22,500 to $23,000. 2025 retirement account contribution amounts.