2024 401k Contribution Limits 2024. The contribution limit for simple 401 (k)s is $16,000 (up to $19,500 if you're 50 or older). The irs sets a limit on how much can be put into a 401 (k) plan every year, also known as an annual contribution limit.
The 401 (k) contribution boost for 2024 is lower. What happens if you go over the limit?