You open one credit monitoring app and see a 672. You check another tool and it shows 691. A third says 648. All three numbers claim to be your credit score, yet none of them match. If you are an ITIN holder, this is one of the most common and most confusing moments in your early credit-building journey. The good news: nothing is wrong with your file. The variation is built into how the U.S. credit system works, and understanding it will actually help you build a stronger profile across all three bureaus.
Why do I have three different credit scores when I only have one credit file?
A question we hear often: many ITIN holders assume a single credit score follows them everywhere. The reality is more layered.
There is no unified credit file in the United States. Equifax, Experian, and TransUnion are three separate, competing companies that each build their own independent file on you. They do not share data with each other. When a lender reports your payment history, it sends that information directly to whichever bureaus it has contracts with, and many lenders do not report to all three.
According to Experian, lenders typically provide data to all three bureaus, but some only report to one or two. If your credit-builder loan reports exclusively to Equifax and your secured card reports only to TransUnion, those two bureaus will have very different pictures of your credit behavior, producing very different scores. For ITIN holders just starting out, this gap can be especially pronounced because a small number of accounts means any missing tradeline has a large proportional impact.
The second source of variation is the scoring model itself. FICO and VantageScore are the two dominant models, and each has multiple versions. FICO Score 8 weights factors differently than FICO Score 9, which differs from VantageScore 4.0. The free score you see on a monitoring app may be calculated by a completely different model than the one a lender pulls when you apply for a lease or a credit-builder loan. A gap of 20-50 points between the score you see and the score a lender sees is normal, even on the same bureau’s data.
What is the actual difference between FICO and VantageScore, and which one do ITIN holders see first?
Both models produce a number on the 300-850 scale, and both draw from the same underlying bureau data. The differences are in the weighting and minimum data requirements. For new ITIN holders, that second point matters a lot.
FICA Score requires at least six months of credit history on file before it will generate a score. VantageScore 4.0 can generate a score with as little as one month of reported history on at least one account. This means that when you check your score for the first time after opening your first credit-builder account, the number you see is almost certainly a VantageScore, not a FICO Score, because your file may not yet meet FICO’s minimum threshold.
Here is how the factor weights compare between the two most common models:
| Factor | FICO Score 8 Weight | VantageScore 4.0 Weight |
|---|---|---|
| Payment history | 35% | 41% |
| Credit utilization | 30% | 20% |
| Length of credit history | 15% | 20% |
| Credit mix | 10% | 6% |
| New credit / inquiries | 10% | 11% |
| Available credit | Not separate | 2% |
Both models reward on-time payments above everything else, but VantageScore places slightly more weight on payment history and credit history length. For ITIN holders building from scratch, the core strategy stays the same either way: consistent, on-time payments on a credit-builder loan or secured account matter more than anything else you can do. According to Experian’s February 2026 white paper, 76.9% of ITIN holders remained current on their accounts after 12 months, a rate 15% higher than SSN consumers, which helps explain why ITIN holders tend to build strong scores once they get started.
There is also a significant 2026 development worth knowing. Fannie Mae and Freddie Mac announced on April 22, 2026 that approved lenders may now use VantageScore 4.0 alongside Classic FICO for conventional mortgage loan decisions. This matters for ITIN holders because thin-file borrowers who cannot generate a FICO Score may now generate a usable VantageScore 4.0, opening doors that were previously closed.
Why does Equifax show a score online but Experian and TransUnion don’t?
Readers frequently ask: why they can sign into one app and see their Equifax score immediately, but get nothing from Experian or TransUnion.
This comes down to how each bureau handles ITIN-based identity verification online. Equifax’s portal at my.equifax.com allows ITIN holders to register by entering the ITIN in the SSN field, and it provides a free VantageScore 3.0 with your credit file once a month. That makes it the most accessible bureau for online score access with an ITIN.
Experian, by contrast, requires ITIN holders to submit a written mail-in request to access their credit report. You must send your full legal name, date of birth, addresses for the past two years, a copy of a government-issued ID, and a current utility bill or bank statement to Experian at P.O. Box 9701, Allen, TX 75013. You can also call Experian directly at (888) 397-3742. TransUnion accepts mail and phone requests as well, or you can contact their live chat support and request that a paper report be mailed to your address.
Because most free credit monitoring apps like Credit Karma pull their data from Equifax (for ITIN holders), the score you see there is Equifax-based. This does not mean your Experian and TransUnion files are empty. It just means fewer automated tools can surface them. Our guide to credit monitoring with an ITIN covers the full set of tools and workarounds in detail.
Does a score difference between bureaus mean something is wrong with my credit?
This one comes up a lot: ITIN holders who see a 30-point gap between Equifax and TransUnion sometimes assume there is an error or a problem. Usually, there is not.
A difference of 20-50 points between bureaus is entirely normal. It reflects the fact that not every account you hold is reported to every bureau, that reports are refreshed at different times in the billing cycle, and that the bureaus may apply slightly different scoring model versions to the same underlying data. According to TransUnion, you may have a different score with each of the three nationwide credit reporting agencies, and slight variations are not a cause for worry.
A difference worth investigating is a large gap, say 80 points or more, or a situation where one bureau shows a much lower score than the other two. That kind of discrepancy can point to a reporting error on one file, an account incorrectly attributed to you, or a collection that landed on only one bureau’s file. In those cases, pulling all three reports and comparing them side by side is the right move. Our article on how to dispute credit report errors with an ITIN walks through exactly how to file a dispute with each bureau, because a correction at one bureau does not automatically fix the same error at the other two.
Which bureau score should I pay attention to most as an ITIN holder?
The honest answer is all three, but in different contexts.
For everyday monitoring and tracking your progress, Equifax is easiest to access with an ITIN and the one you will see most often through free apps. For a broader picture, pull your Experian and TransUnion reports by mail at least once or twice a year to confirm all three files are accurate and growing consistently. Under federal law, you are entitled to a free copy of your report from each bureau at AnnualCreditReport.com, and ITIN holders can submit that request by mail if the online process does not work.
For lender decisions, the bureau that matters most depends entirely on who you are applying with. Auto lenders often pull TransUnion or Equifax. Credit card issuers vary. Mortgage lenders have historically used all three and looked at the middle score. Because you cannot predict which bureau a lender will pull, the most effective approach is to build positive, consistent history at all three bureaus at once. Accounts that report to all three (many credit-builder loans do this by design) give you the broadest coverage. Check whether any account you open reports to all three bureaus before you commit, because an account that only reports to one bureau builds only a third of the credit picture you actually need.
How do I make sure all three bureaus actually have my ITIN credit history?
This is the practical question that ties everything together. Because the bureaus work independently and ITIN-based verification has some quirks, your credit file can exist at one bureau but not yet at another.
The bureaus match reported accounts to an individual using your full name, date of birth, and current address, not just your ITIN number. This means that if any of those details vary slightly across different accounts (a nickname vs. a legal name, or an old address), your history might be fragmented even within a single bureau’s file. When you open any new credit account, always use your full legal name exactly as it appears on your government ID, the same date of birth, and your current address. Consistency across every account is the simplest way to prevent a split file.
If you have been building credit for more than six months and your Experian or TransUnion report comes back empty, it usually means either your accounts are not reporting to that bureau or your identity information did not match their file. In that case, call the bureau directly, explain you are an ITIN holder, and ask whether they have a file under your name and ITIN. Our guide on how to build credit with an ITIN number covers which types of accounts are most likely to report to all three bureaus from day one.
According to a 2026 SSRN study by Cookson, Guttman-Kenney, and Mullins, only 9% of immigrant consumers have a credit score by age 22, but 75% achieve one by age 26, showing how quickly the picture can change once consistent reporting begins. The bureaus all work, the system accepts your ITIN, and the variation in scores you see across them is simply the system operating as designed.