Filing Taxes With an ITIN Instead of a Social Security Number
What an individual taxpayer identification number does, who needs one, how it is applied for and renewed, and the things it definitely does not provide.
The short answer
An ITIN lets people who must file federal taxes but cannot get a Social Security number do so; it expires if unused and grants no status or work authorization.
Key points
- The IRS issues an ITIN for federal tax purposes to people with a filing or reporting requirement who cannot obtain a Social Security number.
- An ITIN expires if it goes unused on a federal return for several consecutive years, and a return filed with an expired number is delayed.
- It confers no immigration status, no work authorization, and no eligibility for benefits that require a Social Security number.
- Anyone who becomes eligible for a Social Security number should get one and stop using the ITIN, so the tax records connect properly.
What's on this page
An individual taxpayer identification number, or ITIN, is a number the IRS issues so that someone who has a federal tax filing or reporting obligation but cannot get a Social Security number can still file. That is the whole of its purpose. It does not give you work authorization, it does not create or improve immigration status, it is not identification for non-tax purposes, and it expires if it goes unused on a federal return for several consecutive years. People who understand those limits use it well; people who are sold it as something more get hurt.
The IRS explains the program on its ITIN pages, which is the place to check current application procedures and renewal schedules.
Who actually needs one
- A person living in the United States with income to report who is not eligible for a Social Security number.
- A spouse or dependent being claimed on a return who has no Social Security number, where the tax rules allow the claim.
- A nonresident who must file a U.S. return or claim a treaty benefit.
- A foreign owner of U.S. rental property with reportable income.
- A person subject to a third-party reporting requirement that needs a taxpayer number.
Careful: If you are eligible for a Social Security number, you cannot get an ITIN, and you should not try. Eligibility for one excludes the other by design. Our guide on Social Security numbers and cards for noncitizens sets out who qualifies for the SSA route.
What an ITIN does not do
| Assumption | Reality |
|---|---|
| "It lets me work legally." | No. Work authorization comes from immigration law. An ITIN is not a document on any employment verification list. |
| "It gives me status." | No. It is a tax processing number and says nothing about immigration status either way. |
| "It is an ID card." | No. It is a number, not a credential, and it does not establish identity. |
| "It qualifies me for federal benefits." | No. Programs requiring a Social Security number are not satisfied by an ITIN. |
| "Filing with one puts me on a list for enforcement." | Federal tax return information is protected by confidentiality rules, though the scope of those protections is a legal and political question that has been argued about repeatedly. |
That last row deserves an honest treatment rather than reassurance. Tax return information is subject to statutory confidentiality with defined exceptions, and the boundaries of information sharing between tax and immigration authorities have been contested in litigation and in policy through the mid-2020s. Anyone weighing this should look at the current position rather than at a summary written earlier, and where the stakes are high, discuss it with immigration counsel alongside a tax preparer rather than with either alone.
Applying and renewing
- Complete the IRS application form for an ITIN, which is normally submitted together with the tax return it is needed for rather than on its own.
- Prove identity and foreign status. The IRS accepts a defined list of documents, with a valid passport being the single document that covers both.
- Choose how to submit. Options include mailing original documents, using an IRS-authorized certifying acceptance agent, or an in-person appointment at a taxpayer assistance center.
- Do not mail originals if you can avoid it. An acceptance agent verifies documents so your passport does not leave your hands for weeks.
- Watch the renewal calendar. Numbers that go unused on a return for several consecutive years expire, and the IRS publishes which numbers expire when.
- Renew before filing season rather than after a return is rejected or delayed.
Tip: An expired ITIN does not invalidate past returns. It delays the current one, and it can hold up credits claimed on it. Renewing early is a scheduling problem, not a legal one.
Why the paper trail matters beyond taxes
Consistent tax filing produces a documented history: addresses, income, dependents, and years of presence. That record has value in immigration contexts that ask about physical presence, financial responsibility, or support obligations — including the affidavit of support, where a sponsor's filing history is examined and where the sponsor's own residence questions arise, as our guide on the domicile requirement for sponsors living abroad describes.
It also matters for consistency. Where a person has filed with an ITIN for years and later obtains a Social Security number, the two records should be connected so wage and filing history line up. The IRS and SSA each publish instructions for that transition; start at irs.gov and ssa.gov, and expect the process to involve notifying the IRS so past ITIN filings are associated with the new number.
Worth knowing: An employer cannot accept an ITIN as evidence of work authorization when completing Form I-9. If a business offers to "hire you on your ITIN," it is either misunderstanding the rules or knowingly ignoring them, and the exposure lands on you as much as on them. See remote examination of I-9 documents for what verification actually requires.
State and local complications
States decide separately whether an ITIN can be used for their own programs. Some states allow ITIN holders to file state returns and claim state credits; some accept an ITIN toward a driver's license application; some do not. Local practice varies again — a county tax preparation program may serve ITIN filers routinely while a neighboring one has no capacity for them. Check the rules for the state and city where you actually live rather than assuming the federal position carries across, and see in-state tuition and residency for immigrant students for a related area where state rules diverge sharply.
Common questions
Can I claim tax credits with an ITIN?
Some credits require a Social Security number for the filer, the spouse, or the child, and others do not. The rules differ by credit and have been changed by Congress more than once, including rules about which family members need which number. Do not assume a credit is available or unavailable based on last year's return; check the current instructions for the specific credit before filing.
Should I file at all if I have no work authorization?
The obligation to file federal taxes turns on income and residency rules, not on immigration status, so many people without work authorization do have a filing requirement. There are real considerations on both sides, including confidentiality questions and the value of a documented history. This is a decision to make with informed advice rather than on general reassurance from either direction.
My preparer said the ITIN would help me get papers later. Is that true?
No, and it is a common sales line. An ITIN is a tax number with no immigration effect. Tax records can be useful evidence in some immigration applications, which is a very different claim from the number itself conferring a benefit. A preparer promising immigration results is describing something they cannot deliver, and probably is not authorized to give immigration advice at all.
What happens to my ITIN if I get a Social Security number?
You stop using the ITIN and use the new number for everything going forward. Notify the IRS so your prior filings under the ITIN are associated with the Social Security number; otherwise your filing history appears to split into two people. This matters when a later application looks for a continuous record of tax compliance across the years in question.
What to do next
- Confirm you are not eligible for a Social Security number, since eligibility for one rules out the other.
- Check whether an existing ITIN has expired before filing season, using the IRS renewal information.
- Find a certifying acceptance agent so you do not mail your passport.
- File the application with the return it supports, following the current IRS instructions.
- Keep copies of every filed return, which become the documented history that has value later.
Sources
This is general information, not legal advice. Citywide Legal Guide is a publication, not a law firm, and reading it creates no attorney–client relationship. Nearly everything here is set locally and differs between states, counties and cities — check the rules where you live or speak to a licensed attorney before acting.
Citywide Editorial Team
Citywide is an independent guide to everyday legal questions. Every guide is researched against primary sources and revised when the rules change. How we source · Corrections
Related guides
All Immigration & Citizenship-
Immigration & Citizenship
Driver's Licenses and State IDs for Noncitizens
The federal REAL ID standards govern which state credentials work for federal purposes, but each state decides what else it will issue and what documents it accepts.
-
Immigration & Citizenship
Municipal ID Cards and What They Can Be Used For
A municipal ID is issued by a city to its residents. It works for city services and often for local police, but it proves residence and identity only, never immigration status.
-
Immigration & Citizenship
Social Security Numbers and Cards for Noncitizens
Who can get a Social Security number as a noncitizen, the difference between an unrestricted card and a restricted one, and how to apply without losing time.
-
Immigration & Citizenship
In-State Tuition and Residency for Immigrant Students
One federal statute limits what states may offer undocumented students, but the actual tuition rules are written state by state and have been repeatedly challenged in court.