If you have three different credit scores, it’s because three separate companies — Equifax, Experian, and TransUnion — each keep their own file on you, your lenders don’t necessarily report to all of them, and the formulas used to turn those files into a number come in several versions that weigh your history differently. Any one of those factors would produce a gap between your scores. Together, they almost guarantee it.
Three Bureaus Keep Three Separate Files
Equifax, Experian, and TransUnion are private, for-profit companies, not government agencies. Each one independently collects and stores information about your borrowing, and federal law doesn’t require them to share data with each other. They compete for business from the lenders and insurers who buy consumer reports, and each one builds its database from the ground up.
All three operate under the Fair Credit Reporting Act, with the Consumer Financial Protection Bureau serving as the primary federal regulator since Dodd-Frank took effect.1Consumer Financial Protection Bureau. CFPB to Supervise Credit Reporting But shared regulation doesn’t mean shared data. The raw information behind your score at one bureau may not match what the other two have on file.
Your Lenders Choose Where to Report
Banks, credit card companies, and other creditors voluntarily decide which bureaus receive your account information. No federal law requires a lender to report to all three, or to report at all.2Office of the Law Revision Counsel. 15 USC 1681s-2 – Responsibilities of Furnishers of Information to Consumer Reporting Agencies A small community bank might send data to only one bureau to keep costs down. A large national card issuer typically reports to all three.
That voluntary system creates real gaps. A personal loan you’re paying on time every month could show up on your TransUnion report and be missing from Equifax and Experian. Your TransUnion score benefits from that positive history; the other two don’t reflect it. A missed payment reported to just one bureau works the same way in reverse, pulling only that score down.
Debt collectors add another layer. A collector who buys an old debt may report it to only one or two bureaus, so a collection account can appear on one file and be entirely absent from the others.
Different Formulas Produce Different Numbers
Even if all three bureaus held identical information, the numbers would still diverge, because the scores themselves come from different formulas. FICO and VantageScore are the two main scoring companies, and FICO scores are used in roughly 90% of lending decisions.3FICO. Basic Facts About FICO Scores But “a FICO score” isn’t one thing. Dozens of versions exist, and lenders pick the version that fits the type of loan they’re making.
Conventional mortgages currently rely on three specific older FICO versions, one from each bureau: Equifax Beacon 5.0, Experian/Fair Isaac Risk Model V2, and TransUnion FICO Risk Score Classic 04.4Fannie Mae. General Requirements for Credit Scores These are sometimes called FICO Score 5, FICO Score 2, and FICO Score 4. The general-purpose FICO Score 8 you see in a banking app is a different formula, which is why the number your bank shows you rarely matches what a mortgage lender pulls.
The formulas weight your behavior differently, too. Across most FICO models, payment history counts for about 35% of your score, amounts owed 30%, length of credit history 15%, new credit 10%, and credit mix 10%.5myFICO. What’s in My FICO Scores? Newer versions handle specific situations in their own way. FICO Score 9 ignores collection accounts you’ve paid off; older versions still penalize you for them.6Experian. What Is FICO Score 9? VantageScore 4.0 takes yet another approach, analyzing how your balances trend over time rather than reading a single snapshot, so it can reward steady paydown that older FICO models overlook.7Equifax. VantageScore 4.0 Product Sheet
Put it all together and the same person can produce a FICO 8 in one banking app, a FICO 2 in a mortgage pull, and a VantageScore in a credit monitoring service, with real spread between them even in a single afternoon.
The Bureaus Update on Different Schedules
Your creditors don’t report on the same day. Most send updates to the bureaus every 30 to 45 days, but each follows its own schedule.8Federal Trade Commission. Consumer Reports: What Information Furnishers Need to Know A credit card issuer might send your updated balance to Experian on the 5th and to TransUnion on the 12th. Check your scores on the 10th, and Experian already reflects your recent payment while TransUnion still shows the older, higher balance.
The bureaus also need time to process incoming data. The result is a rolling lag: your financial reality shows up on one report days or even weeks before the others catch up. A large payment or a new account opening produces especially visible gaps in these in-between periods.
Errors, Mixed Files, and Identity Theft
Some of the difference comes down to mistakes. A “mixed file” happens when a bureau accidentally combines your credit history with someone who has a similar name, date of birth, or Social Security number. If that person carries a heavy debt load or a history of missed payments, your score at that bureau drops while the other two, which didn’t make the same matching error, stay higher.
Identity theft creates a similar pattern. A fraudulent account opened in your name might get reported to just one bureau, pulling that score down while the others look normal. Because each bureau runs its own verification process, an error on one report often doesn’t appear on the other two.
If you spot a mistake, dispute it directly with each bureau that has the wrong information. Correcting it at one bureau doesn’t fix it at the others. Send your dispute in writing with supporting documents, and also notify the creditor or collector who furnished the incorrect information. Under federal law, the bureau generally has 30 days to investigate, with a possible extension to 45 days if you filed after receiving your free annual report or added information during the investigation.9Consumer Financial Protection Bureau. How Long Does It Take to Repair an Error on a Credit Report The bureau must notify you of the results within five business days after finishing.
Which Score Actually Matters When You Borrow
Because the numbers differ, the practical question is which one your lender will use. For a conventional mortgage, the lender pulls a tri-merge report with FICO scores from all three bureaus and then uses the middle score. If your three scores are 720, 705, and 690, the lender uses 705. If two scores match, the repeated number counts as the middle.10Fannie Mae. Determining the Credit Score for a Mortgage Loan
Outside of mortgages, there’s no universal standard. Auto dealers, credit card issuers, and personal loan companies may pull from just one bureau and use whatever FICO or VantageScore version they prefer. That’s why the score a car dealer sees can differ substantially from what a mortgage lender pulls a week later.
If a lender denies your application or offers you worse terms based on your credit, federal law requires them to tell you which agency supplied the report, disclose the score they used, the range of possible scores under that model, and up to four or five key factors that hurt your score.11eCFR. Subpart H – Duties of Users Regarding Risk-Based Pricing That disclosure tells you exactly which of your scores drove the decision.
How to Check All Three Yourself
Federal law entitles you to a free copy of your credit report from each of the three bureaus once every 12 months.12Consumer Advice – FTC. Free Credit Reports Beyond that minimum, all three bureaus have made free weekly access permanent through AnnualCreditReport.com.13Consumer Advice – FTC. You Now Have Permanent Access to Free Weekly Credit Reports Equifax is also offering six additional free reports per year through 2026 at the same site.
These free reports show your credit history but generally don’t include your actual scores. Many banks and card issuers now supply a free FICO or VantageScore through their apps, but remember that number is one version from one bureau, not the score every future lender will see. Pulling all three reports on a regular schedule is the only reliable way to catch errors, spot signs of identity theft, and understand why your scores differ from one bureau to the next.