401k Catch Up 2025. Don't be afraid of getting older. For 2025, the maximum you can contribute to a simple 401 (k) is $16,000.

For those with a 401(k), 403(b), or 457 plan through an employer, your new maximum contribution limit will go up to. The 2025 contribution limit for 401(k) plans is $23,000, up from $22,500 in 2023.