2024 401k Contribution Limits For Simple 401k Contribution. 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. Past year limits are also posted on the irs website in a historical table.

Key takeaways the irs sets the maximum that you and your employer can contribute to your 401(k) each year. More people will be able to make contributions to roth.