Can I have both an ITIN and an SSN?

No. You cannot use both simultaneously. If you have an ITIN and later become eligible for an SSN, you must apply for the SSN and then notify the IRS to rescind your ITIN. The IRS will merge your tax records from both numbers. You should write to the IRS ITIN Operation at P.O. Box 149342, Austin, TX 73301-0025 with your new SSN and old ITIN to request the merge. This ensures all prior tax payments and credits transfer to your SSN.

Do H-4 visa holders need an ITIN or SSN?

H-4 visa holders generally need an ITIN, not an SSN. The H-4 visa is for dependents of H-1B workers. H-4 holders without an Employment Authorization Document (EAD) are not eligible for SSNs because they cannot work. However, H-4 holders with an approved EAD can apply for an SSN since the EAD grants work authorization. If you are an H-4 dependent filing a joint tax return with your H-1B spouse, you need an ITIN.

Do F-1 students need an ITIN or SSN?

It depends on employment. F-1 students with authorized employment (on-campus work, CPT, or OPT) are eligible for an SSN and should apply at the Social Security office. F-1 students without employment authorization who need to file a tax return (such as for a scholarship or fellowship that is taxable) need an ITIN. F-1 dependents (F-2 visa holders) always need an ITIN because the F-2 visa does not allow employment.

Can I use an ITIN to work in the United States?

No. An ITIN does not authorize employment in the United States. The ITIN is issued solely for tax filing and reporting purposes. Only an SSN grants legal work authorization. If an employer asks for your SSN and you provide an ITIN, you cannot be legally hired as a W-2 employee. However, ITIN holders can own US businesses (LLCs, corporations), earn investment income, rental income, and other non-employment income that requires tax reporting.

Do green card holders need an ITIN or SSN?

Green card holders (lawful permanent residents) need an SSN, not an ITIN. Green cards grant permanent work authorization in the US, which makes you eligible for a Social Security Number. Apply for your SSN at your local Social Security Administration office with your green card, passport, and I-551 stamp or approval notice. Most green card holders receive their SSN automatically as part of the immigration process.

What if I am not sure about my SSN eligibility?

Visit your local Social Security Administration office with your passport, visa, and I-94 arrival/departure record. SSA staff will determine your eligibility based on your immigration status. If SSA confirms you are not eligible for an SSN, ask for a denial letter. The SSN denial letter serves as supporting documentation for your ITIN application on Form W-7. You can also call SSA at 1-800-772-1213 for guidance.

Do non-resident aliens who sell US property need an ITIN or SSN?

Non-resident aliens who sell US real property need an ITIN, not an SSN. FIRPTA (Foreign Investment in Real Property Tax Act) requires 15% withholding on the sale price of US real property sold by foreign persons. You need an ITIN to file Form 8288-B (Application for Withholding Certificate) before closing or to claim a refund of excess withholding on your US tax return after the sale.

Can I open a bank account with an ITIN instead of an SSN?

Yes. Many US banks accept ITINs for account opening. The Patriot Act requires banks to verify customer identity, but it does not require an SSN specifically. Banks can accept ITINs, passports, and other government-issued IDs. Major banks that accept ITINs include Wells Fargo, Bank of America, Chase (varies by branch), and online banks like Mercury and Relay. See our complete guide to ITIN bank accounts for details.

What happens to my ITIN if I later get an SSN?

When you become eligible for an SSN, apply for it through the Social Security Administration. Once you receive your SSN, stop using your ITIN immediately. Write to the IRS at the ITIN Operation address in Austin, TX, including your full name, mailing address, ITIN, and SSN. The IRS will rescind your ITIN and merge your tax records. All future tax filings must use your SSN. Your ITIN cannot be reactivated or used by anyone else after rescission.

Updated April 2026 | Source: IRS ITIN Page

Do I Need an ITIN or SSN? Decision Guide 2026

The answer depends on one question: Are you eligible to work in the United States? If yes, you need a Social Security Number (SSN). If no, you need an Individual Taxpayer Identification Number (ITIN). This guide walks you through the decision tree for every common immigration status, explains the key differences between ITINs and SSNs, and tells you exactly which one to apply for based on your situation.

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ITIN vs SSN Decision Tree

Follow this decision tree to determine whether you need an ITIN or SSN. Start at Question 1 and follow the path that matches your situation.

Question 1: Are you a US citizen?

YES

You need an SSN. Apply at your local Social Security Administration office with your birth certificate or US passport.

Continue to Question 2.

Question 2: Do you have a green card (lawful permanent resident)?

YES

You need an SSN. Apply at SSA with your green card, passport, and I-551 stamp.

Continue to Question 3.

Question 3: Do you have a US work visa (H-1B, L-1, O-1, E-2, TN, etc.)?

YES

You need an SSN. Apply at SSA with your passport, visa, I-94, and employment authorization document.

Continue to Question 4.

Question 4: Do you have an Employment Authorization Document (EAD)?

YES

You need an SSN. The EAD grants work authorization. Apply at SSA with your EAD, passport, and I-94.

Continue to Question 5.

Question 5: Do you need to file a US tax return or are you claimed on someone else's return?

YES

You need an ITIN. You are not eligible for an SSN but have a US tax obligation. Apply using IRS Form W-7.

You may not need either. Consult a tax professional to confirm whether you have a US tax filing requirement.

Who Needs an ITIN? Common Situations

The following people typically need an ITIN because they have US tax obligations but are not eligible for a Social Security Number.

H-4 dependent visa holders: Spouses and children of H-1B workers without their own work authorization. Need an ITIN to file a joint tax return with the H-1B spouse or to be claimed as a dependent.
F-2 dependent visa holders: Spouses and children of F-1 students. Cannot work and cannot get an SSN. Need an ITIN if claimed on a US tax return.
Non-resident aliens with US income: Foreign nationals earning rental income, investment income, or business income from US sources. Need an ITIN to file Form 1040-NR.
Foreign business owners: Non-residents who own a US LLC or corporation. Need an ITIN for business tax returns and annual reporting.
Treaty benefit claimants: Foreign nationals claiming tax treaty benefits on US-source income. Need an ITIN to file Form W-8BEN or a US tax return claiming treaty rates.
FIRPTA withholding claimants: Non-residents who sold US real property and need to file for a refund of excess FIRPTA withholding.
Spouses of US citizens filing jointly: Non-resident spouses who elect to file a joint tax return with their US citizen or resident spouse need an ITIN.
Foreign nationals opening US bank accounts: Some banks require a tax ID for account opening. An ITIN satisfies this requirement for those without an SSN.

Who Needs an SSN? Eligibility Requirements

You need an SSN (and are eligible for one) if you fall into any of these categories.

US citizens: All US citizens are eligible for an SSN from birth. Most receive one as infants. If you are a naturalized citizen, apply at SSA after your naturalization ceremony.
Lawful permanent residents (green card holders): Your green card grants permanent work authorization. Apply at SSA with your green card and passport.
Work visa holders: H-1B, L-1, O-1, E-1, E-2, TN, R-1, P-1, and other work-authorized visa categories. Apply at SSA with your visa, passport, I-94, and employer letter.
EAD holders: Anyone with an Employment Authorization Document, including H-4 EAD, OPT, DACA, and asylum applicants with work authorization.
Refugees and asylees: Individuals granted refugee status or asylum are eligible for SSNs and work authorization.

Important:

If you are eligible for an SSN, you must apply for an SSN instead of an ITIN. The IRS will reject an ITIN application from anyone who is SSN-eligible. If you are unsure about your SSN eligibility, visit your local Social Security Administration office first.

ITIN vs SSN: Side-by-Side Comparison

Feature	ITIN	SSN
Issued by	IRS	Social Security Administration
Format	9XX-XX-XXXX (starts with 9)	XXX-XX-XXXX (various)
Authorizes employment	No	Yes
Tax filing	Yes	Yes
Social Security benefits	No	Yes
Expires	Yes (after 3 years without use)	No (lifetime)
Bank accounts	Yes (many banks accept)	Yes (all banks accept)
Credit building	Yes (limited options)	Yes (full access)
Processing time	7 to 14 weeks	2 to 4 weeks
Cost	$0 (IRS fee)	$0

What Happens When You Transition from ITIN to SSN?

Many ITIN holders eventually become eligible for an SSN through marriage, employment authorization, or permanent residency. When this happens, you need to follow a specific process to transition your tax records.

Apply for your SSN at the Social Security Administration. Bring your work authorization document, passport, and I-94. Processing takes 2 to 4 weeks.
Stop using your ITIN immediately. Once you receive your SSN, never use your ITIN on any tax form, bank account, or government document.
Notify the IRS to rescind your ITIN. Write to IRS ITIN Operation, P.O. Box 149342, Austin, TX 73301-0025. Include your full name, mailing address, ITIN, and new SSN. Request that they merge your ITIN and SSN tax records.
Update all accounts. Change your tax ID number from ITIN to SSN with your bank, employer, brokerage, and any other institution that has your ITIN on file.
File future tax returns with your SSN. Your new SSN replaces your ITIN for all purposes going forward.

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Frequently Asked Questions About ITIN vs SSN

An SSN (Social Security Number) is a 9-digit number issued by the Social Security Administration to US citizens, permanent residents, and authorized workers. It allows you to work legally in the US, earn Social Security benefits, and file taxes. An ITIN (Individual Taxpayer Identification Number) is a 9-digit number issued by the IRS to individuals who need to file US taxes but are not eligible for an SSN. An ITIN starts with the digit 9 and does not authorize employment in the US.

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