2025 Contribution Limits 403b Tax. The 401k/403b/457/tsp contribution limit is $23,000 in 2025. — for 2025, the combined employee and employer contribution limit for a 403 (b) plan is $69,0000, an increase of $3,000 from 2023.
— the total employee contribution limit to all 401 (k) and 403 (b) plans for those under 50 will be going up from $22,500 in 2023 to $23,000 in 2025 (compare that. 403(b) contribution limits in 2025 and 2023 for 2025, employees under 50 can contribute up to $23,000.