The IRS.gov IP PIN number is a six-digit code assigned to eligible taxpayers to prevent identity theft in federal tax filings. It is required for e-filed returns when the IRS detects a potential mismatch between a taxpayer's identity and their prior-year return.
The IP PIN is issued automatically by the IRS to individuals whose Social Security Number (SSN) appears on a previously filed return and who have not yet claimed a refund or filed a return in the current year. It is not a password, not a login credential, and not a substitute for a taxpayer's SSN or filing status.
Once generated, the IP PIN must be entered during the electronic filing process. Without it, the IRS will reject the return as potentially fraudulent. This system protects both taxpayers and the government from unauthorized filings using stolen identities.
The IRS assigns the IP PIN during the processing of a prior-year tax return. If the IRS identifies a pattern suggesting someone else may have used a taxpayer's SSN to file a return, it triggers a review. If the review confirms the individual is legitimate, the IRS generates a unique six-digit IP PIN and sends it via mail to the address on file.
For example, if Jane Doe filed her 2022 return and the IRS later flags her SSN due to a suspicious 2023 return filed under her name by an impostor, she will receive a letter from the IRS with her IP PIN. She must then enter this code when filing her 2024 return electronically.
IP PINs are valid only for the calendar year they are issued. They cannot be reused across years. If a taxpayer files multiple returns in a single year (e.g., amended returns), each submission requires the correct IP PIN for that year.
Not all taxpayers receive an IP PIN. The IRS issues it only to individuals whose SSN was used in a fraudulent return filed in a previous year. According to the IRS, approximately 1.2 million taxpayers received an IP PIN in 2023, up from 900,000 in 2022, reflecting increased identity theft attempts.
Eligibility is based on a combination of factors: the SSN must appear on a prior-year return, and the IRS must detect a discrepancy in the filing history. The IRS does not issue IP PINs proactively. You do not apply for one. It is sent automatically by mail within 60 days of the IRS identifying a risk.
Businesses, trusts, and estates do not receive IP PINs. Only individual taxpayers with SSNs qualify. Non-resident aliens, those without a valid SSN, or individuals who have not filed a return in the past two years are excluded.
| Eligibility Criteria | Meets Requirement? |
|---|---|
| Filed a 2022 return with the IRS | Yes |
| SSN used in a fraudulent 2023 return | Yes |
| Received a letter from the IRS with IP PIN | Yes |
| Filed a 2024 return without IP PIN | No - return rejected |
Many people confuse the IP PIN with their IRS Online Account password or their FSA PIN. These are distinct systems. The IP PIN is only for e-filing. It does not grant access to your account balance or tax transcripts.
A common mistake is assuming the IP PIN is available online. It is not. The IRS does not display the IP PIN on the IRS.gov website or through the IRS2Go app. Attempting to retrieve it via online portals results in an error. The only way to obtain it is by receiving the physical letter in the mail.
Another misunderstanding is thinking the IP PIN is a permanent identifier. It is not. It changes annually. Even if you used the same IP PIN for two consecutive years, the IRS generates a new one each time. Reusing an old IP PIN leads to rejection of the return.
In 2023, the IRS identified 1.1 million fraudulent returns linked to stolen SSNs. One case involved Marcus Lee, a resident of Portland, Oregon. His SSN appeared on a 2022 return he filed. In early 2023, someone else attempted to file a 2023 return using his SSN and claiming a $12,000 refund.
The IRS flagged the duplicate SSN activity. After verifying Marcus's identity through his 2022 return, the IRS issued him an IP PIN. He received the letter in the mail on March 14, 2023. On April 10, he filed his 2023 return using the IP PIN. The IRS accepted it immediately.
Had Marcus not received the IP PIN, the IRS would have rejected his return. The fraudster's return would have been processed first, leading to a refund being issued to the wrong person. The IP PIN prevented this outcome.
Always wait for the physical letter before attempting to file. Do not assume the IP PIN is available online. The IRS warns that websites claiming to "generate" or "lookup" IP PINs are scams.
If you suspect your IP PIN has been compromised, report it immediately. The IRS provides a dedicated form (Form 14039) for reporting identity theft. Submitting it stops further fraudulent filings and initiates a recovery process.
The IRS.gov IP PIN number is a critical tool in preventing tax identity theft. It helps only the rightful taxpayer can file a return using their SSN. It is not a login, not a password, and not a universal access code.