I have a single owner S-Corporation with its own EIN. Do I need another EIN for a Self-Directed Solo 401k?
While you can use the S-Corporation EIN for the Self-Directed Solo 401k, I recommend establishing separate one specific for the Solo 401k, which only takes a few minutes to establish via the IRS website for free, to avoid confusion in reporting with the IRS. The EIN for the Solo 401k will be a tax-deferred EIN whereas the one for the S-Corporation is not.














