2025 401k Maximum Deferral. Total 401(k) plan contributions by an employee and an employer cannot exceed $69,000 in 2025. Starting in 2025, employees can contribute up to $23,000 into their 401(k), 403(b), most 457 plans or the thrift savings plan for federal employees, the irs.

The basic employee contribution limit for 2025 is $23,000 ($22,500 for 2023). The 401 (k) contribution limit for 2025 is $23,000 for employee contributions, and $69,000 for the combined employee and employer contributions.