Social Security Number (SSN) and ITIN: Do You Need One?
When you need a Social Security Number, how to apply, and what to do if you're not eligible for one.
Last updated: March 1, 2026
A Social Security Number (SSN) is a 9-digit number used for tax reporting and identity verification in the US. It's not a visa or work permit — but you'll need one for many things. Here's when and how to get one.
When do you need an SSN?
- You got a job (on-campus, CPT, or OPT) — your employer needs it for tax reporting
- You're applying for a driver's license (required in most states)
- You want to build credit history (credit cards, future apartment applications)
- You're filing taxes with income
How to apply for an SSN
F-1 students can only get an SSN if they have authorized employment (on-campus job, CPT, or OPT). You can't apply 'just in case.'
The Social Security Administration (SSA) needs time to verify your immigration records with DHS. Applying too early results in denial.
Your employer provides a job offer letter. Your International Student Office provides a letter confirming your enrollment and work authorization.
Bring: passport, I-20, I-94, employment letter, and ISO letter. Find the nearest office at ssa.gov.
Takes 2-4 weeks by mail. Your employer can start processing your paperwork with just the receipt — you don't need the physical card to begin working.
⚠️Your SSN is extremely sensitive — treat it like a password. Never share it over email, text, or phone unless you're certain of the recipient. Memorize it and keep the card in a safe place at home, not in your wallet.
What if you don't qualify for an SSN?
If you don't have employment authorization, you can't get an SSN. But you may still need a tax identification number:
SSN vs ITIN
For people authorized to work in the US. Required by employers. Also used for credit, driver's license, and general ID purposes. Apply at the SSA office.
For people who need to file taxes but aren't eligible for an SSN. Starts with 9. Apply by mailing Form W-7 to the IRS with your tax return. Takes 7-11 weeks.
Protecting your SSN
- Only give your SSN to: employers (for tax forms), banks (opening an account), the IRS, and your school (if required)
- Never email or text your full SSN
- Check for SSN scams — the SSA will never call you threatening arrest or asking for payment
- Monitor your credit at annualcreditreport.com (free once per year) to check for identity theft
- If your SSN is stolen, report it to identitytheft.gov immediately
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