How do I make a contribution to my solo 401(k)?

To contribute to your Solo 401(k), you will need to link the appropriate bank account.

We recommend using a business bank account as your funding account as well as working with a CPA to ensure that appropriate payroll funds are being used for the contributions to your solo 401(k). 

You can select the tax year you’d like to make contributions toward as long as it is within the tax deadline timeframe (similar to IRAs).

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.