2025 Irs 401k Limit. 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. For employer sponsored plans, including 401(k)s the 2025 contribution limits will jump to $23,000.
Employers can contribute to a roth 401 (k) by matching. Section 415 of the internal revenue code (code) provides for dollar limitations on benefits and contributions under qualified retirement plans.