Actually there is old IRS guidance allowing the use of the EIN, but being three years retired now, I no longer remember the cite. I think it dates back to the 80s, so it’s probably obsolete given all the identification laws and rules that have come since then. That said, it’s far better to get a separate TIN. Not only is it technically correct since the trust is a separate entity from the employer, but using the EIN can have disastrous consequences if the employer gets into hot water with the IRS over things like unpaid payroll taxes. The IRS can levy (seize) employer accounts for unpaid taxes AND they identify accounts to levy by the ID number on the account. Imagine trying to unwind the mess created if the IRS were to hoover up plan assets for unpaid payroll taxes. This actually happened to the client of a TPA I knew way back in the day. Over the years I had a handful of clients get in arrears on tax payments, (stuff happens) but they managed to avoid IRS levy action.
Jim Norman
P.S. Hi Larry!