By Harry Prabandham · Updated September 28, 2026
Personal Finance
Credit Scores Explained: How They're Calculated and How to Improve Yours
A credit score is a number, usually 300–850, built from your credit reports. Payment history and amounts owed matter most; income isn't a factor.
Credit Scores Explained: How They're Calculated and How to Improve Yours
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What is a credit score?
- It is a number, usually from 300 to 850 in FICO and VantageScore models, that estimates how likely you are to repay debt.
- It is calculated from your credit reports at Equifax, Experian, and TransUnion.
- You have many scores, because lenders use different models and versions and each bureau's report can differ.
- Scores affect loan approval and pricing, and many insurers use credit-based insurance scores where state law allows.
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Full Guide
What is a credit score?
- It is a number, usually from 300 to 850 in FICO and VantageScore models, that estimates how likely you are to repay debt.
- It is calculated from your credit reports at Equifax, Experian, and TransUnion.
- You have many scores, because lenders use different models and versions and each bureau's report can differ.
- Scores affect loan approval and pricing, and many insurers use credit-based insurance scores where state law allows.
What goes into a FICO score?
- FICO weights payment history about 35%, amounts owed 30%, length of history 15%, new credit 10%, and credit mix 10%.
- Utilization, meaning balances relative to limits, drives amounts owed and is measured per card and overall.
- Income, employment, and savings aren't part of the score, though lenders may weigh them separately.
- Checking your own score is a soft inquiry and doesn't affect it.
How can you improve your credit score?
- Pay every bill on time; most late payments can stay on your reports for up to seven years.
- Pay down revolving balances, including before the statement date if you want a lower reported balance.
- Keeping older accounts open preserves available credit and history length.
- Rate-shop for a mortgage or auto loan within a short window, which FICO counts as one inquiry, 14 to 45 days depending on version.
What are common credit score myths?
- Carrying a card balance isn't needed to build credit; paying in full still shows on-time use.
- Closing an unused card can raise utilization and eventually shorten average account age.
- A credit freeze doesn't lower your score.
- Paying off a collection may not remove it, though some newer scoring models ignore paid collections.
How do you check your credit reports?
- AnnualCreditReport.com is the official source for free reports, now available weekly from all three bureaus.
- Disputes go to the credit bureau and the company that reported the item, and bureaus generally must investigate within 30 days.
- Look for unfamiliar accounts, wrong balances, and late payments you didn't make.
- A score from a card issuer or app may use a different model than a lender uses.
How does a credit freeze work?
- A security freeze blocks most new creditors from viewing your report, making new-account fraud harder.
- Freezes are free by federal law at each bureau and can be lifted temporarily when you apply for credit.
- A fraud alert, which lasts one year, is an alternative that asks lenders to verify your identity.
- Parents and guardians can request freezes for children under 16.
Key takeaways
- Payment history and amounts owed drive most of a FICO score.
- Income isn't in the score, and checking your own score doesn't hurt it.
- Free weekly reports at AnnualCreditReport.com make errors easier to catch.
- A free credit freeze is a simple defense against new-account fraud.
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