401k 2024 Contribution Limit Irs After Tax. In 2025, the irs allows you to contribute up to $23,500 to your 401(k) plan, up from $23,000 in 2024. In 2022, the most you can contribute to a roth 401(k) and contribute in pretax contributions to a traditional 401(k) is $20,500.

For 2025, the 401(k) limit for employee salary deferrals is $23,500, which is above the 2024 401(k) limit of $23,000. 401k and retirement plan limits for the tax year 2024.