A credit score is a model-based estimate of credit risk, calculated from information in a credit report. It is not one universal number: the score a lender sees can differ from a score you check because the model, bureau report, product type, or calculation date may differ.
How credit scoring models work
Credit scoring companies apply mathematical formulas, called scoring models, to information in a credit report. The result is a score for a specific model and version, using a particular report at a particular time. Lenders use scores to help assess applications, but may also consider other information. The Consumer Financial Protection Bureau (CFPB) explains that companies create scores from report information using a scoring model.
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There is no single score that every lender uses. FICO is one score brand, with multiple model versions; VantageScore is another. Their general descriptions can help explain common factors, but their precise formulas are proprietary. A public explanation cannot reproduce a lender’s exact score.
What information can affect a score?
Models commonly consider whether payments were made on time, debt and account balances, credit utilization (balances relative to available limits), the age and types of accounts, recent applications, and negative report items such as collections, foreclosure, or bankruptcy. Which factors matter most depends on the model, version, and contents of the report.
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FICO’s published factor overview
myFICO gives the following general-population breakdown for FICO Scores:
| Factor | Published share |
|---|---|
| Payment history | 35% |
| Amounts owed | 30% |
| Length of credit history | 15% |
| New credit | 10% |
| Credit mix | 10% |
These figures are myFICO’s broad overview, not guaranteed weights for every person or every FICO version. myFICO says a factor’s importance varies with a person’s credit profile and report information; other scoring models may weigh information differently.
Many scores fall within a 300–850 range, according to the CFPB, but score ranges can vary by company and model. The range alone does not tell you whether a score is the one a particular lender will use.
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Different scores do not automatically indicate that a report contains an error. Common reasons include:
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- Different scoring models or versions: A lender may select a model suited to its product, and different versions can evaluate the same report differently.
- Different bureau reports: Credit reporting companies may hold different information about your accounts.
- Different timing: A score generated on one date may use report data that has changed by the time another score is calculated.
- Different loan or credit products: Lenders may use scores tailored to particular kinds of lending.
A consumer-facing score is useful for understanding the factors shown by that service, but it is not necessarily the score a lender will use. When comparing scores, check the model and version, bureau data source, date generated, product relevance, and the factors listed by the service. The CFPB’s guide to understanding your credit score discusses score differences and factors that can influence scores.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to do after a credit application is denied
If a creditor takes adverse action, it must give specific principal reasons. The explanation should describe factors actually considered or scored; complexity or use of an algorithm does not remove the notice requirement. The CFPB says this applies even when creditors use complex algorithms, including artificial intelligence or machine learning. See CFPB Circular 2022-03 and the official interpretation of Regulation B, 12 CFR § 1002.9.
- Read the adverse-action notice. Note the stated reasons and whether the decision was based on a consumer report.
- Check the score and report details in the notice. When a denial is based on a consumer report, the notice generally identifies the reporting company, provides the score used and key factors where applicable, and explains your right to obtain a free report from that company within 60 days.
- Get and review your report. The CFPB says you are entitled to one free report every 12 months from each nationwide reporting company through AnnualCreditReport.com. It also describes a temporary offer of up to six additional Equifax reports during each 12-month period through December 2026; check the CFPB’s current consumer reporting companies information for availability.
- Dispute inaccurate or incomplete information. You can dispute it with the reporting company and with the company that furnished the information. Follow the dispute instructions provided by each company and keep copies of your records.
The CFPB’s denial guidance explains the notice and report rights. Checking a report does not by itself mean a score must change; focus on whether the data is accurate and on the factors identified for the score.
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