TD Ameritrade, for example, has no setup or maintenance fees but may charge commissions and service fees for certain actions you take in your account. A Vanguard solo 401(k), on the other hand, allows you to invest only in Vanguard funds. You could also choose a provider with a self-directed solo 401(k). A Rocket Dollar self-directed solo 401(k), for example, will hold any asset class that's allowed by the IRS -- but you'll pay $360 to open the account and then $15 a month in maintenance fees. What will be more challenging is making those regular contributions, particularly if your income is inconsistent from month to month.

Source: Daily Sun January 25, 2021 14:41 UTC