401k Limit 2024 Catch Up. This is the maximum amount you can contribute to. 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.

401(k) (other than a simple 401(k)) 403(b) For 2025, you can defer up to $23,500 into 401(k) plans, up from $23,000 in 2024.