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PTIN vs EFIN: what’s the difference?
Two IRS numbers, endlessly confused. One identifies you; the other identifies the business that transmits returns. Here's the whole thing, simply.
By Tiffany Hill Moore, Founder & former auditor · Updated July 2026
The one-sentence answer
A PTIN identifies the person who prepares a return for pay; an EFIN identifies the business approved to transmit returns electronically to the IRS.
What a PTIN is
The Preparer Tax Identification Number is required for anyone who prepares federal returns for compensation. It's personal — one per preparer — obtained online from the IRS quickly, renewed annually, and it goes on every return you prepare. No PTIN, no paid preparing. Full stop.
What an EFIN is
The Electronic Filing Identification Number is issued to a business that has passed the IRS's e-file provider application and suitability check. The holder is an ERO — an Electronic Return Originator. One office has one EFIN, and many PTIN-holding preparers can work under it.
Side by side
- PTIN: identifies a person · EFIN: identifies a business
- PTIN: required for every paid preparer · EFIN: required only to transmit e-filed returns
- PTIN: quick online application · EFIN: application plus a suitability check that can take 45+ days
- PTIN: renewed every year · EFIN: maintained as long as your provider status stays in good standing
- PTIN: yours alone · EFIN: covers every preparer working under that office
Which comes first
The PTIN — always. It's the license to prepare. Then you can begin under an authorized provider's EFIN immediately and apply for your own EFIN when you're ready to be the office instead of working in one.
From an auditor's chair: On a properly filed return, both numbers do their job: your PTIN says who prepared it, the EFIN says who transmitted it. When those don't line up with reality, that's the paper trail examiners follow.
Frequently asked questions
Do I need both a PTIN and an EFIN?
You always need a PTIN to prepare returns for pay. You only need your own EFIN if your business transmits returns to the IRS — otherwise you work under an authorized provider's EFIN.
Which comes first, PTIN or EFIN?
PTIN first. It's required before you prepare any paid return. The EFIN comes later, when you're ready to become an e-file provider yourself.
Are a PTIN and an EFIN the same thing?
No. The PTIN identifies an individual preparer; the EFIN identifies an IRS-approved e-file provider business. They appear together on e-filed returns but serve different roles.
Ready to build the right way?
New to the industry? Built to Start covers your PTIN path, works under a supervised EFIN, and walks you to your own ERO status.
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