2024 401k Limits Catch Up Irs. The irs sets 401(k) contribution limits and typically increases them by $500 annually. Of note, the 2024 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.

For those with a 401(k), 403(b), or 457 plan through an employer, your new maximum contribution limit will go up to $23,000 in 2024. Those same limits apply to 403(b) plans, most.