If you are an EU founder expanding into the US market, one of the first financial questions you will face is whether you need an ITIN or an SSN to build credit. The answer determines which banks will work with you, which credit cards you can access, and how quickly you can establish the financial foundation your US business needs.
Most EU founders are not eligible for an SSN. That does not mean you are locked out of the US credit system. It means you need to understand the ITIN path clearly so you can build credit the right way from day one.
What Is an ITIN and How Is It Different From an SSN?
An SSN (Social Security Number) is a nine digit number issued by the Social Security Administration to US citizens, permanent residents, and individuals authorized to work in the United States. It serves as both a tax identification number and an identity marker across the US financial system.
An ITIN (Individual Taxpayer Identification Number) is a nine digit number issued by the IRS to individuals who need a US tax identification number but are not eligible for an SSN. It starts with the digit 9 and has a specific format that distinguishes it from an SSN.
The key differences:
- Eligibility: SSNs require US work authorization. ITINs are available to anyone with a US tax filing obligation, including non-resident business owners.
- Purpose: Both are used for tax reporting. Only the SSN is linked to Social Security benefits and employment authorization.
- Credit bureaus: Both are accepted by Experian, Equifax, and TransUnion for creating credit files.
- Financial products: More lenders and card issuers accept SSNs. Fewer accept ITINs, but the number is growing every year.
For EU founders operating a US LLC or filing US taxes through their business, the ITIN is the standard path. If you are registering your LLC in Florida, which is a popular choice for international entrepreneurs due to favorable tax and privacy structures, the ITIN becomes your gateway to the entire US credit ecosystem.
How an ITIN Affects Your US Credit Score
Here is the good news: the FICO scoring model does not differentiate between ITIN and SSN holders. Your credit score is calculated using the same algorithm regardless of which number is on your file. Payment history, credit utilization, length of credit history, credit mix, and new inquiries are all weighted identically.
The practical difference is not in how your score is calculated but in how many products are available to you. With an SSN, nearly every bank and lender in the country will accept your application. With an ITIN, your options are narrower, especially at the beginning. This means your credit building strategy needs to be more intentional about which products you apply for and in what order.
Same scoring model, different product access. An ITIN holder with two well managed credit accounts and low utilization will have the same FICO score as an SSN holder with the same profile. The difference is getting approved for those first accounts.
Which Banks and Credit Cards Accept ITINs
The landscape of ITIN friendly financial institutions has expanded significantly in recent years. Here are the most relevant options for EU founders building US credit.
Credit Cards for ITIN Holders
- Secured credit cards: Capital One Platinum Secured and OpenSky Secured Visa are two of the most accessible options. No prior US credit history required. You put down a deposit that becomes your credit limit.
- Bank of America: Accepts ITINs for several of their credit card products, including some unsecured cards for applicants with an existing banking relationship.
- Capital One: One of the more ITIN friendly major issuers across both secured and unsecured products.
- Credit unions: Many Florida based credit unions accept ITINs, particularly for secured cards and basic banking products.
Bank Accounts for ITIN Holders
- Mercury: Popular with non-resident founders for business banking. Accepts ITIN applications and can be opened entirely online.
- Relay: Another strong option for business banking with ITIN support and remote onboarding.
- Traditional banks: Bank of America, Chase, and Wells Fargo all have ITIN banking programs, though in-branch setup may be required for some products.
For a deeper look at which credit cards work best for EU founders in the US, see our guide on the best US credit cards for EU founders. And if you are focused on business credit cards specifically, read our breakdown of US business credit cards for EU entrepreneurs.
Limitations of Building Credit With an ITIN
While an ITIN opens the door to US credit, there are real limitations you should understand upfront:
- No employment authorization. An ITIN does not grant the right to work in the United States. It is strictly a tax identification number.
- Some lenders do not accept ITINs. Certain banks, mortgage lenders, and auto finance companies require an SSN. This narrows your options for larger credit products down the road.
- Thin file challenges. With fewer products available, it takes longer to build a robust credit file. You may have only one or two accounts for the first several months.
- Renewal requirement. ITINs expire if not used on a federal tax return for three consecutive years. You must keep your ITIN active by filing regularly.
- Some automated systems reject ITINs. Online applications at certain banks may not accept the ITIN format. In those cases you may need to apply in person or by phone.
None of these limitations are insurmountable. They simply mean you need a structured approach rather than a trial and error one. This is where working with someone who understands the ITIN credit building path makes a meaningful difference.
How EU Founders Get an ITIN: The W-7 Process
To obtain an ITIN, you file IRS Form W-7 along with a qualifying tax document. Here is the process:
- Determine your eligibility. If you own a US LLC, have US source income, or have a US tax filing requirement, you qualify for an ITIN.
- Prepare Form W-7. The application requires your legal name, foreign address, date of birth, country of citizenship, and the reason you need the ITIN.
- Gather identity documents. You need your passport (original or certified copy) and any additional documentation proving your foreign status and identity.
- Choose your submission method. You can mail the W-7 directly to the IRS (which means mailing your original passport), use a Certified Acceptance Agent (CAA) who can verify your documents in person so you keep your passport, or visit an IRS Taxpayer Assistance Center.
- Wait for processing. The IRS typically issues ITINs within 7 to 11 weeks. During tax season, processing can take longer.
Use a Certified Acceptance Agent. For EU founders, a CAA is almost always the best option. You avoid mailing your passport internationally, the agent catches errors before submission, and processing tends to be faster. Many CAAs work remotely and serve international clients.
Once you have your ITIN, you can immediately begin opening bank accounts and applying for credit products. There is no waiting period after issuance.
Building Credit With an ITIN: Step by Step
Once your ITIN is in hand, here is a structured approach to building US credit as an EU founder:
- Open a US bank account. Start with a business checking account at Mercury, Relay, or a traditional bank that accepts ITINs. This establishes your banking relationship and gives you a US payment method.
- Apply for a secured credit card. A Capital One Platinum Secured or OpenSky Secured Visa is the most reliable starting point. Deposit $200 to $500 and use the card for small recurring purchases.
- Keep utilization below 10%. On a $500 limit, that means keeping your balance under $50 at statement close. This is the single most controllable factor in your early credit score.
- Pay on time, every time. Set up autopay for the full statement balance. Payment history is the largest factor in FICO scoring at 35% of your score.
- Add a second account after 3 to 6 months. Once your secured card has several months of positive history, apply for a second credit product. This could be another card or, if available, an ITIN friendly credit builder loan.
- Monitor your credit file. Use free monitoring tools to track your score and ensure all accounts are reporting correctly to all three bureaus.
For EU founders also building business credit alongside personal credit, the strategy gets more layered. Understanding the distinction between personal and business credit is critical for structuring your approach correctly. See our guide on how to build business credit fast in Florida for the complete business side of the equation.
Build Your US Credit Foundation the Right Way
The APEX EU Founders program walks you through the entire process: ITIN, banking, credit building, and funding. No guesswork, no wasted months on the wrong products.
Frequently Asked Questions
Can I build a US credit score with an ITIN instead of an SSN?
Yes. All three major US credit bureaus (Experian, Equifax, and TransUnion) accept ITINs and generate credit files the same way they do for SSN holders. Your FICO score is calculated using the same model regardless of whether you use an ITIN or SSN. The main difference is that fewer lenders and card issuers accept ITINs, so your initial product options are more limited.
How long does it take to get an ITIN as an EU founder?
The IRS typically processes W-7 applications in 7 to 11 weeks. If you apply through a Certified Acceptance Agent (CAA), you can avoid mailing your original passport and often receive your ITIN slightly faster. During peak tax season (January to April), processing times tend to be longer.
Which US banks accept ITINs for credit cards and bank accounts?
Several major institutions accept ITINs. For credit cards, Bank of America, Capital One, and some credit unions offer cards to ITIN holders. For bank accounts, Mercury and Relay are popular with non-resident founders. Secured credit cards from Capital One and OpenSky are also available to ITIN holders and are commonly used as a starting point for building credit.