401k 2024 Contribution Limit Irs After Tax. For those with a 401(k), 403(b), or 457 plan through an employer, your new maximum contribution limit will go up to $23,000 in 2024. Those 50 and older can contribute an additional $7,500.

For those with a 401(k), 403(b), or 457 plan through an employer, your new maximum contribution limit will go up to $23,000 in 2024. The 2024 401(k) contribution limit is $500 higher than this year’s $22,500 max, which reflected a major increase from the 2022 limit of $20,500.