401k 2025 Contribution Limit Over 50. For 2025, you can contribute up to $69,000 to your solo 401 (k), or $76,500 if you're 50 or older. Employees can invest more money into 401 (k) plans in 2025, with contribution limits increasing from 2023’s $22,500 to $23,000 for 2025.

The social security administration on oct. Employees can invest more money into 401 (k) plans in 2025, with contribution limits increasing from 2023’s $22,500 to $23,000 for 2025.