2024 401k Maximum Deferral. Employees 50 and older can contribute an additional. 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.

For those with a 401(k), 403(b), or 457 plan through an employer, your new maximum contribution limit. The overall 401 (k) limits.