Maximum 401k Contribution For 2025. Starting in 2025, employees can sock away up to $23,500 in their 401(k)s. That's a $500 bump from the $23,000 elective deferral limit for 401(k) plan employee contributions in 2024.

$70,000 (up $1,000 from 2024) 457(b) plans. The standard 2025 maximum 401k contribution limit for employees is $23,500 (+$500 versus 2024).