2024 Contribution Limits 401k Catch Up Over 50. Those 50 and older can contribute an additional $7,500. For 2024, the maximum you can contribute to a simple 401 (k) is $16,000.

The limit on employer and employee contributions is $69,000. For 2024, the 401 (k) contribution limit for employees is $23,000, or $30,500 if you are age 50 or older.