IRS Identity Protection PIN
A six digit number that makes it effectively impossible for someone else to file a tax return in your name. Free, voluntary, and available the same day.
A guide by Taxstra Tax & Accounting · CPA-led tax strategy for business owners
Written by Bryan Martin, CPA, Managing Partner and Founder of Taxstra. Last updated August 15, 2026.
Quick answer
An IRS Identity Protection PIN is a six digit number that must appear on your tax return for it to be accepted. Without it, a fraudulent return filed in your name is rejected. Any taxpayer can opt in through the Get an IP PIN tool in their IRS Online Account, and the number changes every year.
Tax-related identity theft works because filing a return requires very little that is actually secret. A name, a Social Security number, and a date of birth are enough, and all three are widely available after two decades of data breaches.
An Identity Protection PIN closes that gap. It adds a number the IRS knows and a thief does not, and without it an electronically filed return in your name is rejected outright. It costs nothing and takes about ten minutes.
What an IP PIN Actually Does
It moves you from detecting fraud afterward to preventing it up front.
Without an IP PIN
- A thief files early using your Social Security number
- They claim a refund and it gets paid
- Your real return is rejected as a duplicate
- You file Form 14039 and switch to paper
- Your legitimate refund is delayed, often for months
With an IP PIN
- A thief files without the number
- The return is rejected immediately
- No fraudulent refund is issued
- Your return processes normally
- You never find out it happened
Three Ways to Get One
Only the first is immediate.
Online, same day
Use the Get an IP PIN tool inside your IRS Individual Online Account. Identity verification requires a photo ID and, usually, a selfie match. The number appears immediately once you are through. This is the route to use.
Form 15227, by mail
Available if your income is below the published threshold and you cannot verify online. The IRS calls you to verify, then mails the number, and it applies to the following filing season rather than the current one.
In person at a Taxpayer Assistance Center
Requires an appointment and two forms of identification. The fallback when online verification fails and Form 15227 does not apply.
Taxstra Tip
Enroll every member of the household who has a Social Security number, including dependents. Child identity theft is common precisely because nobody checks a seven year old's credit, and a fraudulent dependent claim can block your own return from being accepted.The Annual Renewal Nobody Expects
The number changes every January, and last year's will reject your return.
An IP PIN is valid for one calendar year. The IRS generates a new one each year and makes it available in your Online Account in early January. Enrolled taxpayers also receive Notice CP01A by mail with that year's number.
The most common IP PIN failure
Someone enrolls, saves the number somewhere sensible, and uses it again the following year. The return rejects with an IP PIN mismatch, which looks alarming and is entirely routine. Pull the current year number from your Online Account and refile.Do not rely on the CP01A letter arriving. It goes to your address of record, which is whatever address was on your last filed return, and it is one of the more commonly lost pieces of IRS mail. The Online Account is authoritative and always current.
If You Are Already a Victim
The sequence matters, and an IP PIN is not the first step.
If your electronically filed return was rejected because a return already exists under your Social Security number, you are past prevention and into remediation. Confirmed victims are enrolled in the IP PIN program automatically once the case is resolved, so applying is not the immediate task.
1. File Form 14039, the Identity Theft Affidavit
This opens the case with the IRS Identity Theft Victim Assistance unit.
2. File your real return on paper
Electronic filing stays blocked while the duplicate exists. Your return is still due, and filing it protects your refund claim.
3. Pull a tax account transcript
It shows what the fraudulent return claimed, which is how you know what has to be unwound.
4. Expect a long resolution timeline
These cases historically take many months. Keep filing on time each year while it is open.
Step three is where the tax account transcript earns its keep, since it shows exactly what was filed and what was paid out. If the transcript instead shows assessments for years you never filed, that is usually a substitute for return rather than identity theft. And if a letter prompted all of this, check it against the CP14 balance due notice or the CP3219A notice of deficiency before responding, because the deadlines differ sharply between them.
Return Rejected Because One Was Already Filed?
That is identity theft, and the recovery process has a specific sequence that matters. A Taxstra CPA can walk you through it. The initial consultation is free.
Frequently Asked Questions
Protecting the Return Is the Floor, Not the Strategy
Once your filing is secure, the question becomes whether you are paying more than the law requires. Book a free initial consultation with a Taxstra CPA.
Next Steps
Filing it yourself is fine. Optimizing it is where the money is.
Getting the form right keeps you out of trouble. The strategies below are what actually lower the bill.
Someone filed using your information
What actually happens next, and how the account gets untangled.
Reading your IRS transcript
The fastest way to see whether a return was already filed under your number this year.
Understanding IRS notices
Which letters are real, which are scams, and what each one is actually asking for.
Want a CPA to run the numbers for you?
Free 30-minute call with a Taxstra CPA. No pressure, just the math for your situation.
Authoritative Sources
- IRS Get an Identity Protection PIN
- IRS Form 15227, Application for an Identity Protection PIN
- IRS Identity Theft Central
- IRS Form 14039, Identity Theft Affidavit
- IRS Understanding Your CP01A Notice
Citations reflect U.S. federal tax law as of the article's last reviewed date.
Related IRS Account and Security Guides
IRS Tax Transcripts
How to see exactly what the IRS has on file under your Social Security number.
IRS Notice CP14
The balance due notice, and how to tell a real one from a scam letter.
IRS Notice CP3219A
The statutory notice of deficiency and the deadline that comes with it.
IRS Substitute for Return
What the IRS files when nobody else does, and why it usually overstates the tax.
