Maximum 401k Contribution 2025 Calculator App. This calculator is intended to help you calculate the correct 401k contribution percentage to hit a target contribution amount by the end of the year. The 2025 contribution limit for 401(k) plans is $23,000, up from $22,500 in 2023.

In 2025, people under age 50 can contribute. If you’re age 50 or older, you’re.