2024 401k Contribution Limits Catch Up Calculator. If you're age 50 or older,. Starting in 2024, employees can contribute up to $23,000 into their 401(k), 403(b), most 457 plans or the thrift savings plan for federal employees, the irs announced nov.

The annual maximum for 2024 is $23,000. That limit is $23,000 in 2024 and $23,500 in 2025.