2025 401k Max Salary Cap. The combined employee and employer contribution limit is also going up in 2025. Workers who contribute to a 401 (k), 403 (b), most 457 plans and the federal government's thrift savings plan can contribute up to $23,500 in 2025, a $500 increase from the $23,000 cap in 2024.

For 2025, the elective deferral limit is estimated to be $24,000. There is a higher 401(k) contribution limit for 2025.