SSN vs ITIN: What Newcomers Need to Know
Understanding the difference between SSN and ITIN — which one you need and how to get it as a newcomer to the US.
Two numbers run your financial life in America: the Social Security Number (SSN) and the Individual Taxpayer Identification Number (ITIN). As a newcomer, understanding the difference is critical.
What is an SSN?
A Social Security Number is a 9-digit number issued by the Social Security Administration (SSA). It's the standard ID for financial activities in the US.
Who can get one: Anyone authorized to work in the US — this includes J1 visa holders, H1B workers, green card holders, and US citizens.
How to apply:
- Visit your local Social Security office
- Bring your passport, visa, I-94, and work authorization documents
- Fill out Form SS-5
- Receive your SSN card by mail in 2-4 weeks
What is an ITIN?
An Individual Taxpayer Identification Number is a 9-digit number issued by the IRS. It's specifically for tax purposes.
Who needs one: People who need to file US taxes but don't qualify for an SSN — certain visa holders, dependents of visa holders, and some international students.
How to apply:
- Fill out IRS Form W-7
- Attach your federal tax return
- Provide identification documents (passport is usually sufficient)
- Mail to the IRS or visit a Certified Acceptance Agent
- Processing takes 7-11 weeks
Key Differences
| Feature | SSN | ITIN |
|---|---|---|
| Issued by | Social Security Administration | IRS |
| Purpose | Work, taxes, credit, benefits | Taxes only |
| Work authorization required | Yes | No |
| Can open bank accounts | Yes | Yes (most banks) |
| Can apply for credit cards | Yes (all banks) | Yes (some banks like Discover) |
| Format | XXX-XX-XXXX | 9XX-XX-XXXX (starts with 9) |
Which Banks Accept ITINs?
Not all banks require an SSN. These accept ITINs:
- Discover — Credit cards and bank accounts
- Bank of America — Bank accounts and some credit cards
- Wells Fargo — Bank accounts
- Chase — Bank accounts (credit cards typically require SSN)
- Citibank — Bank accounts
Pro Tips for Newcomers
- Apply for your SSN immediately if you're work-authorized. Don't wait — the sooner you get it, the sooner you can start building credit.
- Don't share your SSN/ITIN freely. Only provide it when legally required (banks, employers, IRS). Never give it over email.
- If you have an ITIN now but get an SSN later, notify the IRS so they can merge your records. This ensures your tax and credit history stays connected.
- Your SSN is not your credit score. Having an SSN just lets you participate in the credit system — you still have to build your score.
Bottom Line
If you can work in the US, get your SSN first. It unlocks the most financial options. If you can't get an SSN, an ITIN still lets you open bank accounts and even get certain credit cards. Either way, don't delay — your financial clock starts ticking from day one.