How Credit Scores Work: The Factors That Can Affect Your Score
Your score is not random. It is calculated from information in a credit report—but the exact result can vary according to the scoring model, credit bureau data, and timing.
What is a credit score?
A credit score is a number created from information in a consumer credit report. Lenders may use it—along with income, debt, collateral, and their own requirements—to help evaluate an application. You can have multiple scores because different scoring models and different bureau files may be used.
The five major FICO score-factor categories
Payment history
Whether accounts have generally been paid as agreed. Late payments and other serious negative events can matter, while their effect can vary by recency, severity, and frequency.
Amounts owed
This includes balances and credit utilization—the relationship between revolving balances and available limits. Owing money does not automatically mean poor credit, but heavily used limits may signal greater risk.
Length of credit history
Models may consider the ages of your oldest and newest accounts, the average age of accounts, and how long particular accounts have been used.
Credit mix
A report may contain revolving accounts and installment accounts. You generally should not open an account solely to create a particular mix.
New credit
Recent applications, hard inquiries, and newly opened accounts may be considered. Checking your own credit is generally treated differently from a lender’s hard inquiry.
Why the score you see may differ from a lender’s score
A lender may use a different score version or a score designed for a particular type of lending. The underlying information can also differ among Equifax, Experian, and TransUnion, and reports can update at different times. A difference does not necessarily mean that either score is wrong.
A simple example
Suppose a card issuer reports a balance before your payment reaches the account. A score calculated from that report may reflect the reported balance even if you later pay it. When the issuer reports updated information, a later score may use different data. This is one reason scores can move over time without the scoring formula itself changing.
What should you focus on first?
- Review your reports: confirm that accounts and personal details appear accurate.
- Protect payment history: organize due dates and address missed-payment risks early.
- Watch reported revolving balances: learn how utilization works before making a plan.
- Apply thoughtfully: avoid opening accounts merely to chase a score.
- Measure trends, not daily noise: score changes can reflect reporting dates and model differences.
Frequently asked questions
Is there only one credit score?
No. Different scoring companies, model versions, bureau data, and industry-specific models can produce different scores.
Does checking my own credit hurt my score?
Checking your own credit is generally considered a soft inquiry and does not have the same scoring effect as a lender’s hard inquiry.
Can someone guarantee a specific score increase?
No responsible service can guarantee a specific increase or timeline. Outcomes depend on the information in an individual report and the scoring model used.
Should I close an old card I no longer use?
Consider fees, account terms, utilization, and your ability to manage the account. Closing it can affect available revolving credit, so review the full situation rather than relying on one rule.
Bottom line
Strong credit habits are usually built through accuracy, consistency, and time. Start by understanding your reports, protecting payment history, and keeping revolving balances manageable. Then evaluate new credit carefully based on your actual needs.
Next recommended guide: Credit Utilization Explained
Learn how reported revolving balances and credit limits work together.
Continue to the Guide →