Your credit score looks different at each bureau because Equifax, Experian, and TransUnion don’t hold the same information, don’t receive updates on the same days, and don’t all get run through the same scoring formula. A 20-, 50-, or even 100-point gap between the three numbers is normal, not a sign that something is broken. Understanding which of those three causes is driving your gap tells you whether to ignore it, fix it, or time your next credit application around it.
The Three Bureaus Hold Different Data
Credit data flows to three national bureaus, but no federal law requires a creditor to report to all three.1Federal Trade Commission. Free Credit Reports A local credit union might send payment updates only to TransUnion. A medical provider might report a collection to Experian and skip the others. A scoring model can only work with what sits in that specific bureau’s file, so a missing account creates an immediate gap in the resulting score.
Some tools widen the split on purpose. Experian Boost adds on-time payments for utilities, rent, phone bills, insurance, and streaming services to your Experian file only.2Experian. What Is Experian Boost? Those payments never reach Equifax or TransUnion. If Boost raises your Experian score by 20 or 30 points, you’ve built a real discrepancy across your three files. Real, but expected.
Reporting Dates Rarely Line Up
Creditors generally update the bureaus once a month, and the reporting date varies by institution.3Experian. When Do Late Payments Get Reported? Nothing forces them to sync. If you made a large credit card payment on the 5th and one bureau posts the update on the 7th while another doesn’t see it until the 22nd, any lender or app pulling your score in that window gets two different answers. One reflects a paid-down balance and low utilization. The other still shows the debt.
The timing gap resolves itself, but it can hit at the wrong moment. During a mortgage application, stale data at one bureau can push your middle score below a pricing tier and cost you thousands over the life of the loan. Lenders sometimes address this with rapid rescoring: after you make a payment or correct an error, the lender requests a fresh pull, and updated data typically appears within three to five business days.4Equifax. What Is a Rapid Rescore? You can’t initiate one on your own. It’s almost exclusively offered during the mortgage process.
Different Formulas Applied to the Same File
Even when two bureaus hold identical information, the score can still diverge because different lenders run that data through different scoring models. Two companies dominate: Fair Isaac Corporation (FICO) and VantageScore. They look at similar raw data but weight the factors differently, so the same borrower produces different scores depending on which formula is running.
FICO alone has published more than 50 versions of its scoring software, and lenders don’t automatically upgrade. Most mortgage lenders still use Classic FICO — FICO Score 2 at Experian, FICO Score 4 at TransUnion, and FICO Score 5 at Equifax — because Fannie Mae and Freddie Mac have required those versions for loans sold to the government-sponsored enterprises. Many credit card issuers and the free score in your banking app rely on FICO Score 8 or 9 instead.5myFICO. FICO Score Versions
These versions treat the same file differently. FICO 8, for example, ignores small collection accounts under $100 entirely, while Classic FICO counts them. A single old $75 collection can drop your mortgage score without touching the number your banking app shows.
Industry-Specific Scores Use a Different Scale
Beyond the base models, FICO publishes Auto Scores and Bankcard Scores tuned for those decisions. These industry versions run on a 250-to-900 scale instead of the standard 300-to-850.5myFICO. FICO Score Versions A base FICO of 720 and a FICO Auto Score of 780 aren’t directly comparable. They’re measured on different rulers.
Errors That Show Up on Only One Report
Credit report errors are more common than most people assume, and they usually appear on just one of the three bureau reports. Mixed files, where another person’s accounts get merged into yours because of a similar name or Social Security number, are a frequent culprit. A single misplaced collection or a bankruptcy belonging to someone else can tank one score by 100 points while the other two remain clean. If your gap is that large, an error is the first thing to rule out.
The Fair Credit Reporting Act gives you the right to dispute inaccurate items directly with the bureau.6Office of the Law Revision Counsel. 15 USC 1681 – Congressional Findings and Statement of Purpose The bureau must investigate and resolve the dispute within 30 days, with a possible 15-day extension if you provide additional information during that initial window.7Office of the Law Revision Counsel. 15 USC 1681i – Procedure in Case of Disputed Accuracy If a bureau willfully fails to follow the law, you can recover statutory damages between $100 and $1,000 per violation, plus punitive damages and attorney fees.8Office of the Law Revision Counsel. 15 USC 1681n – Civil Liability for Willful Noncompliance
When a bureau doesn’t fix the error after your dispute, you can escalate by filing a complaint with the Consumer Financial Protection Bureau at consumerfinance.gov. The CFPB forwards your complaint to the company, which generally has 15 days to respond, up to 60 in complex cases.9Consumer Financial Protection Bureau. Submit a Complaint About a Financial Product or Service
Rate Shopping Counts Differently by Model
When you apply for credit, a hard inquiry can lower your score by roughly 5 to 10 points, and the impact fades within about a year. The bigger scoring difference comes from how each model handles multiple applications for the same type of loan.
FICO’s newer versions (8, 9, 10) give you a 45-day window for mortgage, auto, and student loan shopping. All hard inquiries in that window count as a single inquiry. Older FICO versions that many mortgage lenders still use only allow a 14-day window.10myFICO. The Timing of Hard Credit Inquiries – When and Why They Matter VantageScore deduplicates all hard inquiries of any type within a rolling 14-day period.11Experian. The Difference Between VantageScore Credit Scores and FICO Scores
A borrower who spends six weeks comparing mortgage rates looks fine under newer FICO models but can take hits from older versions that count each inquiry separately. Same shopping, different model, different score.
Medical Collections Show Up Inconsistently
Medical debt is a recurring source of bureau-to-bureau gaps. In 2023, the three major bureaus voluntarily agreed to stop reporting medical collections under $500, even if unpaid, and to remove paid medical collections entirely. Those voluntary policies remain in place.
The CFPB attempted a broader rule banning medical debt from credit reports, but a federal court vacated it in July 2025, finding it exceeded the agency’s authority under the FCRA.12Consumer Financial Protection Bureau. CFPB Finalizes Rule to Remove Medical Bills from Credit Reports Because the full ban never took effect and the bureau policies are voluntary, medical collections over $500 can still appear on some reports but not others, depending on which collection agency reported the debt and where. A single large medical collection showing up at one bureau and not the other two is one of the more common explanations for a sudden, large scoring gap.
How to Check All Three Yourself
The three bureaus have permanently extended free weekly credit report access through AnnualCreditReport.com. Equifax is offering six additional free reports per year through 2026 on top of the weekly access.1Federal Trade Commission. Free Credit Reports
The free score in your banking app pulls from a single bureau using a single model version. It’s useful for tracking direction, but it can’t show you the gap between bureaus or between models, and it won’t reveal an error sitting on the report it doesn’t read. Before any major credit application, pull all three reports and read them line by line. That is what actually protects your rate.