2025 Solo 401k Contribution Limits. For 2025, the contribution limit increases to $70,000 or $77,500 if age 50 or over (the. Discover the increased retirement plan contribution limits for 2025, including updates for 401(k)s, iras, hsas, and more.

401(k) contribution limits for 2025 the 401(k) contribution limit for 2025 is $23,500 for employee salary deferrals, and $70,000 for the combined employee and employer. Current law says employers must enable employees to participate in the company’s 401(k) plan, if available, when workers meet.