For 2025, the contribution limit for a Solo 401(k) is up to $70,000. You can contribute up to 25% of your income as an employer as well as up to $23,500 as an employee as well.
If you are over the age of 50, you can contribute an additional $7,500 each year as a catch-up contribution or an additional $11,250 for those between the ages of 60 and 63.
If your spouse participates, they can also contribute up to the same limits.
Betterment’s platform enables clients to make prior-year contributions to their Solo 401(k) until October 15 of the following plan year. However, certain entity types may have different, possibly earlier, deadlines. Betterment does not verify the entity type, tax structure, or reporting obligations of individual Solo 401(k) plans.
Please note that Betterment does not provide tax or accounting advice, and you are responsible for ensuring that your Solo 401(k) satisfies applicable contribution and tax filing deadlines.
Related Articles