Do I need a business EIN in order to establish my Solo 401k plan?
I'm completing my Solo 401k application, and it asks for a business EIN. I am a sole proprietor and have been using my name and my Social Security number until now to run my business. Do I need to apply for new EIN? And once I have a new EIN, will I have to file a separate tax return for my business?
Answer:
Yes. A business EIN needs to be listed on the Solo 401k plan documents.
The 401k plan must be adopted by any eligible business of any type (e.g. corporation, partnership, LLC, sole proprietorship, etc.). Proper Employer Identification Number (EIN) must be used in connection with the business. You can not use your Social Security number. Therefore you, as a sole proprietor, need to apply for new EIN with the IRS and use it in connection with your business and on your Solo 401k plan documents.
If you are a sole proprietor, you can continue filing Schedule C (part of your personal tax return). The new business EIN can be entered in section D of your Schedule C. This should have no effect on your tax return, but we suggest you consult tax professional for details.