How do I use the EIN for my Solo 401(k)?

How do I use the EIN for my Solo 401(k)?

Your Solo 401(k) has its own Employer Identification Number (EIN) as a tax-sheltered retirement plan. Use the plan EIN any time you are asked to identify the plan for financial accounts, vendor relationships, income reporting, and W-9 forms.

What is the Solo 401(k) EIN

As part of creating your Solo 401(k), we obtain a dedicated plan EIN. It identifies your plan as a tax-sheltered retirement trust.  When income is reported to this EIN, the IRS knows it belongs to a retirement plan.

When to use the plan EIN

Use the Solo 401(k) EIN any time you are asked to identify the plan:

  • Opening a bank or brokerage account in the plan's name
  • Opening a crypto exchange account for the plan
  • Establishing a servicing relationship with a property tax authority, insurance provider, or contractor
  • Completing IRS Form W-9 or equivalent for an investment sponsor or income-issuing party
  • Issuing Form 1099-R when making distributions from the plan to a participant

Where to find your EIN confirmation

The IRS mails Notice CP-575 as official confirmation of the plan's EIN. Expect it within 10 to 14 days of filing. In the meantime, we include a temporary confirmation from the filing process that most banks and institutions will accept. Do not lose the CP-575 when it arrives. Obtaining a replacement is a difficult and time-consuming process.

Completing a W-9

When an investment sponsor or income-issuing party asks you to complete IRS Form W-9, use the plan name on Line 1 and enter the plan EIN in Part I as the Employer Identification Number. The plan is classified as a retirement trust. Check "Other" and write in "401K RETIREMENT PLAN." Step-by-step instructions are in How do I fill out IRS Form W-9 for a Solo 401(k)?

Frequently Asked Questions

Can I use my business EIN for the plan?
No. The business EIN and the plan EIN are separate identifiers for separate entities. Using your business EIN for plan accounts or income reporting will cause the activity to be attributed to your business rather than the tax-sheltered plan.

What is a 1099-R and when does the plan issue one?
Form 1099-R is the tax document issued when a distribution is made from the plan to a participant. The plan issues the 1099-R using the plan EIN as the payer identifier. Your CPA will use this form when preparing your personal return for the year of the distribution.

Where do I find my EIN confirmation?
The IRS mails Notice CP-575 as official confirmation. If you need it before it arrives, use the temporary confirmation included with your plan documents — most institutions will accept it in the interim.

Do I use the plan EIN or business EIN on Form 5500-EZ?
Use the business EIN on form 5500-EZ.  In this case, the IRS wants the EIN of the plan administrator (your business), not the plan itself.

Disclosure

This information is provided for educational purposes only and should not be interpreted as tax, legal, or investment advice. Readers are encouraged to consult a qualified professional who can offer guidance based on their personal situation.


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