Solo 401k Contribution Limits 2025 Fidelity. In conclusion, the increased contribution limits for 2025 present a valuable opportunity for solo 401k holders. For 2025, those limits are $69,000 total for the year or $76,500 if you are 50 or older.
The total solo 401(k) contribution limit is up to $69,000 in 2025. In 2025, this goes up to $23,000.