401k Limit 2024 Single. Employees can contribute up to $23,500 to their 401 (k) plan for 2025 vs. If you participate in a 401 (k) retirement savings plan at work, your personal contribution limit in 2024 is $23,000.
Solo 401 (k) allows business owners with no employees to set aside up to $70,000 in 2025. In 2025, that limit rises to $23,500.