401k Contribution Limits 2025. In 2025, the 401 (k) contribution limit for participants is increasing to $23,500, up from $23,000 in 2024. Starting in 2025, employees can contribute up to $23,500 into their 401 (k) and 403 (b) plans, most 457 plans, and the thrift savings plan for federal employees, the irs announced nov.

It will go up by $500 to $23,500 in 2025. If you are age 50 or over by december.