You can pay federal taxes without a Social Security number by using an Individual Taxpayer Identification Number, or ITIN, which the IRS issues to people who have a U.S. tax filing obligation but aren’t eligible for an SSN.1Internal Revenue Service. Individual Taxpayer Identification Number The ITIN goes in every spot on your return where an SSN would normally appear, and if a payment or extension is due before your ITIN is assigned, the IRS lets you send it in with a placeholder and reconcile everything later.
What an ITIN Is
An ITIN is a nine-digit number used only for federal tax purposes. It lets you file a return, make payments, and get credit for tax already withheld from your income.1Internal Revenue Service. Individual Taxpayer Identification Number
It does not authorize work in the United States, qualify you for Social Security benefits, or change your immigration status. Applying for one does not flag you with immigration authorities; the IRS handles tax information the same way regardless of which identifier you use.1Internal Revenue Service. Individual Taxpayer Identification Number
If you’re eligible for an SSN, the IRS won’t give you an ITIN. Get the SSN first.2Internal Revenue Service. About Form W-7, Application for IRS Individual Taxpayer Identification Number
Who Needs One
You need an ITIN if you have a federal tax obligation and can’t get an SSN. That covers a few common situations:
- Non-resident aliens who earned U.S. income not fully shielded by a tax treaty, or who need to file to claim a refund of overwithholding.
- Resident aliens who meet the substantial presence test and owe U.S. tax without SSN-qualifying work authorization.3Internal Revenue Service. Substantial Presence Test
- Spouses or dependents claimed on a U.S. citizen or resident alien’s return who don’t have SSNs.
- Non-resident aliens claiming reduced withholding under a tax treaty.
How to Apply
The application is Form W-7. You’ll list your legal name, date of birth, country of citizenship, and the reason you need the number.2Internal Revenue Service. About Form W-7, Application for IRS Individual Taxpayer Identification Number
You also submit documents proving your identity and your foreign status. A valid passport is the cleanest option because it’s the only single document that establishes both.4Internal Revenue Service. Revised Application Standards for ITINs Without a passport, you’ll need at least two documents from the IRS’s approved list, with one proving identity, one proving foreign status, and at least one carrying a photo. National ID cards, civil birth certificates, foreign voter registration cards, U.S. visas, and USCIS photo IDs are among the accepted documents.5Internal Revenue Service. ITIN Supporting Documents Children under 14, or under 18 if a student, don’t need to meet the photo requirement.
The IRS takes originals or copies certified by the issuing agency. Notarized photocopies don’t qualify.
You have to attach the completed W-7 and documents to a federal tax return, unless you fit one of the limited exceptions.4Internal Revenue Service. Revised Application Standards for ITINs Three ways to submit the package:
- Mail it to the IRS ITIN Operation office in Austin, Texas. Simple, but you’ll be without your original documents for several weeks.
- Use a Certifying Acceptance Agent (CAA), who can authenticate most documents in person, hand them back to you, and mail the package on your behalf. CAAs charge fees that vary.6Internal Revenue Service. How to Apply for an ITIN
- Book an appointment at an IRS Taxpayer Assistance Center that offers in-person ITIN service. No fee, and you keep your documents.6Internal Revenue Service. How to Apply for an ITIN
Processing runs about seven weeks, stretching to nine or eleven weeks during tax season (January 15 through April 30) or when the application comes from overseas.6Internal Revenue Service. How to Apply for an ITIN
Paying Taxes Before Your ITIN Arrives
A tax bill doesn’t wait for the IRS to finish processing your number. If you owe an estimated payment, fill out the voucher on Form 1040-ES, or Form 1040-ES (NR) for non-resident aliens, and write “ITIN TO BE REQUESTED” wherever the form asks for an SSN or ITIN. Mail the voucher with your check or money order. Do not attach a Form W-7 to the payment.1Internal Revenue Service. Individual Taxpayer Identification Number
The same trick works for an extension. File Form 4868 with “ITIN TO BE REQUESTED” in the SSN/ITIN fields before the April deadline. That buys you until October 15 to file the return without a late-filing penalty. It does not extend the time to pay: interest and the late-payment penalty still run on any unpaid balance from the original due date.1Internal Revenue Service. Individual Taxpayer Identification Number
Once your ITIN is assigned and you file the actual return with Form W-7 attached, the IRS ties those earlier payments to your new number.
What It Costs to Skip Filing
Not having an SSN doesn’t exempt you from filing. If you meet the filing threshold, the IRS expects a return, and two penalties can stack.
The failure-to-file penalty is 5% of the unpaid tax per month or partial month, capped at 25%.7Internal Revenue Service. Failure to File Penalty The failure-to-pay penalty runs 0.5% per month on the unpaid balance, also capped at 25%. When both apply in the same month, the filing penalty drops to 4.5% so the combined hit is 5%.
Once a return is more than 60 days late, the minimum failure-to-file penalty is $525 (for returns due after December 31, 2025) or the full amount of tax owed, whichever is smaller.7Internal Revenue Service. Failure to File Penalty Filing on time and paying whatever you can beats waiting, even when you can’t cover the whole balance.
Credits You Can and Can’t Claim
An ITIN filer’s tax bill isn’t computed exactly like an SSN filer’s. The Earned Income Tax Credit is off the table entirely: it requires a valid SSN for you, your spouse if filing jointly, and any qualifying child.8Internal Revenue Service. Who Qualifies for the Earned Income Tax Credit (EITC) – Section: Valid Social Security number
The Child Tax Credit is available, worth up to $2,200 per qualifying child, but the child must have an SSN.9Internal Revenue Service. Child Tax Credit A parent with an ITIN can claim it if the child has an SSN; a child with only an ITIN can’t be a qualifying child for the Child Tax Credit or the Additional Child Tax Credit.10Internal Revenue Service. Child Tax Credit
For a dependent with an ITIN, the Credit for Other Dependents may apply, up to $500 per dependent. It covers U.S. citizens, nationals, or resident aliens with either an SSN or ITIN who don’t qualify for the Child Tax Credit. The credit phases out starting at $200,000 of income, or $400,000 for joint filers.11Internal Revenue Service. Understanding the Credit for Other Dependents
Keeping Your ITIN Active
An ITIN expires on December 31 if you haven’t used it on a federal return for three straight tax years.12Internal Revenue Service. How to Renew an ITIN The number still belongs to you, but you can’t file with it until you renew.
Renewal uses the same Form W-7. Check the renewal box at the top, attach it to the front of the return, and include the same identity and foreign-status documents.13Internal Revenue Service. Instructions for Form W-7 (Rev. December 2024) The IRS won’t process your return until the renewal clears, which delays any refund. If you have no return to file, there’s nothing to renew.