Can You Pay Taxes Without a Social Security Number?

You can pay federal taxes without a Social Security number. The IRS issues an Individual Taxpayer Identification Number (ITIN) to people who have a U.S. tax filing obligation but aren’t eligible for an SSN, and that number goes in every spot on your return and payment vouchers where an SSN would normally appear.¹ Paying taxes without a Social Security number is a routine process once you have an ITIN, and the IRS has a specific workaround for paying on time while your application is still being processed.

What an ITIN Is

An ITIN is a nine-digit number the IRS assigns solely for federal tax purposes. It lets you file returns, make payments, and get proper credit for taxes already withheld or paid through estimates.¹

It does not do anything else. An ITIN does not authorize work in the United States, qualify you for Social Security benefits or the Earned Income Tax Credit, change your immigration status, or serve as ID outside the federal tax system.¹ Applying for one also does not flag you with immigration authorities; the IRS treats your tax information the same regardless of which identification number you use.

Who Should Apply

You need an ITIN if you have a federal tax obligation and can’t get an SSN from the Social Security Administration. Common situations include:

Non-resident aliens required to file a U.S. return, including those filing to claim a refund of overwithholding.
Resident aliens who meet the substantial presence test and owe U.S. tax but don’t have work authorization that qualifies them for an SSN.²
Dependents or spouses without SSNs who are claimed on a U.S. citizen or resident alien’s return.
Non-resident aliens claiming a tax treaty benefit for reduced or eliminated withholding.

If you’re eligible for an SSN, apply for one instead. The IRS will not issue an ITIN to anyone who qualifies for an SSN.³

How to Apply for an ITIN

Form W-7 and Supporting Documents

The application is Form W-7. You’ll provide your full legal name, date of birth, country of citizenship, and the reason you need the number.³

You also need documents proving your identity and your foreign status. A valid passport is the simplest option because it’s the only single document that establishes both.⁴ For dependents, the passport must show a U.S. entry date unless the dependent is from Canada or Mexico, or is a dependent of U.S. military personnel overseas.

Without a passport, submit at least two documents from the IRS’s approved list. One must prove identity, one must prove foreign status, and at least one must include a photo. Accepted documents include a national identification card, civil birth certificate, foreign voter registration card, U.S. visa, and USCIS photo ID, among others.⁵ Children under 14 (or under 18 if a student) are exempt from the photo requirement.

The IRS accepts original documents or certified copies from the issuing agency. Notarized photocopies don’t count. If you mail originals, expect to be without them for several weeks.

Three Ways to Submit

Your Form W-7 and supporting documents must be attached to a federal income tax return, unless you qualify for one of the limited exceptions.⁴ You have three channels:

By mail to the IRS ITIN Operation office in Austin, Texas. Simple, but you part with your original documents until processing finishes.
Through a Certifying Acceptance Agent (CAA). A CAA can authenticate most of your documents on the spot, return them to you, and mail the package for you. CAAs charge a fee, and costs vary.⁶
In person at an IRS Taxpayer Assistance Center. Some TAC locations offer ITIN services at no cost and let you keep your originals after the appointment.⁶

The IRS estimates about seven weeks for processing, stretching to nine or eleven weeks during tax season (January 15 through April 30) or from overseas.⁶

Paying on Time While Your ITIN Is Pending

Here’s where people get stuck: you may owe tax before the IRS finishes processing your application. The deadline doesn’t move, but there’s a specific workaround.

For estimated payments, use 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 include a Form W-7 with the payment.¹

Need more time to file? Use the same approach on Form 4868, writing “ITIN TO BE REQUESTED” in the SSN/ITIN fields and mailing it before the April due date. An extension gives you until October 15 to file without a late-filing penalty, but it does not extend the deadline for paying. Any unpaid balance accrues interest and penalties from the original due date.¹

When your ITIN arrives and you file the actual return with Form W-7, the IRS matches the earlier payments to your new number.

Which Tax Credits You Can Claim

Filing with an ITIN limits certain credits. 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.⁷

The Child Tax Credit, worth up to $2,200 per qualifying child, is available to ITIN-holding parents, but only if the child has a valid SSN.⁸ A child who only has an ITIN cannot be a qualifying child for the Child Tax Credit or the Additional Child Tax Credit.⁹

If your dependent has an ITIN rather than an SSN, you may still claim the Credit for Other Dependents, worth up to $500 per qualifying dependent. It’s available for dependents who are U.S. citizens, nationals, or resident aliens with either an SSN or an ITIN, and who don’t otherwise qualify for the Child Tax Credit.¹⁰ The credit phases out starting at $200,000 of income ($400,000 for married couples filing jointly).

Keeping Your ITIN Active

ITINs expire. Your number expires on December 31 if you haven’t used it on a federal tax return for three consecutive tax years.¹¹ The number still belongs to you, but you’ll need to renew it before filing again.

Renewal uses the same Form W-7. Check the renewal box at the top, attach it to the front of your tax return, and include the same identity and foreign-status documentation.¹² The IRS won’t process the return until the renewal clears, which delays any refund. Submission methods are the same as the original application. If you don’t need to file a U.S. return, you don’t need to renew.

What It Costs to Skip Filing

Lacking an SSN is not a reason to skip filing. If you meet the filing threshold, the IRS expects a return regardless of which identification number you use, and waiting triggers two penalties that stack.

The late-filing penalty is 5% of the unpaid tax for each month or partial month a return is overdue, capped at 25%.¹³ A late-payment penalty of 0.5% per month runs on any unpaid balance, also capped at 25%. In months when both apply, the IRS reduces the filing penalty by the payment penalty amount, so you’d effectively owe 4.5% for late filing plus 0.5% for late payment during that overlap.

If your return is more than 60 days late, the minimum failure-to-file penalty jumps to $525 (for returns due after December 31, 2025) or the full tax owed, whichever is less.¹³ That minimum applies even on small balances. Filing on time and paying what you can is always cheaper than ignoring the deadline.

1
Internal Revenue Service. Individual Taxpayer Identification Number
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Internal Revenue Service. Substantial Presence Test
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Internal Revenue Service. About Form W-7, Application for IRS Individual Taxpayer Identification Number
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Internal Revenue Service. Revised Application Standards for ITINs
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Internal Revenue Service. ITIN Supporting Documents
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Internal Revenue Service. How to Apply for an ITIN
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Internal Revenue Service. Who Qualifies for the Earned Income Tax Credit (EITC) – Section: Valid Social Security number
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Internal Revenue Service. Child Tax Credit
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Internal Revenue Service. Child Tax Credit
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Internal Revenue Service. Understanding the Credit for Other Dependents
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Internal Revenue Service. How to Renew an ITIN
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Internal Revenue Service. Instructions for Form W-7 (Rev. December 2024)
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Internal Revenue Service. Failure to File Penalty