What Credit Scores Are and Why They Matter

Credit scores are three-digit numbers that help lenders estimate how likely you are to repay borrowed money. They are based mainly on information in your credit reports, which record details about credit cards, loans, payment history, balances and applications for new credit.

In the United States, the most commonly used scoring models are FICO Score and VantageScore. Most scores range from 300 to 850, although the exact range can vary by model. A higher score generally suggests lower lending risk. Lenders may use a score when deciding whether to approve your application, what interest rate to charge and how much credit to offer.

Credit scores can also affect more than loans and credit cards. Depending on state law and the situation, landlords, insurers, utility companies and employers may review credit-related information. However, these businesses may use specialized versions of your credit information rather than the same score a mortgage lender sees.

How Credit Scores Are Calculated

Each scoring model uses its own formula, but several factors consistently matter. Understanding them can help you focus on the actions most likely to improve your credit.

  • Payment history: Paying bills on time is usually the most important factor. A payment that is 30 days or more late may be reported to the credit bureaus and can hurt your score. More serious delinquencies, collections, charge-offs and bankruptcies may cause greater damage.
  • Credit utilization: This is the percentage of your available revolving credit that you are using. For example, a $1,000 balance on a card with a $5,000 limit represents 20% utilization. Lower utilization is generally better, and many experts recommend keeping it below 30%; people with the highest scores often use substantially less.
  • Length of credit history: Scoring models may consider how long your accounts have been open, the age of your oldest account and the average age of your accounts. Closing an old credit card can reduce your available credit and may eventually shorten your average account age.
  • New credit applications: Applying for several accounts within a short period can create multiple hard inquiries and may signal financial stress. A single inquiry usually has a small effect, but the impact can be more noticeable if you apply for many accounts.
  • Credit mix: Having experience with different types of credit, such as revolving credit cards and installment loans, can help in some scoring models. You should not take out a loan solely to create a credit mix.

Your income, job title, savings and checking-account balance generally do not appear in standard credit reports and are not direct components of most credit scores. They can still matter to a lender’s separate underwriting decision.

Credit Score Ranges and What They Mean

For the common FICO range of 300 to 850, scores are often grouped into these categories:

  • 300 to 579: Poor
  • 580 to 669: Fair
  • 670 to 739: Good
  • 740 to 799: Very good
  • 800 to 850: Exceptional

These labels are guidelines rather than universal rules. One lender may approve an applicant with a fair score, while another may require a higher score. Credit score requirements also vary by product. A credit card issuer may use different standards from a mortgage lender, and secured loans may have more flexible requirements than unsecured loans.

A higher score does not guarantee approval. Lenders may also evaluate your income, debt-to-income ratio, employment, down payment, assets and the information in your full credit report. In addition, the score you see through a bank or personal finance app may not be the exact score used by a lender because of differences in scoring models, credit bureau data and the date the score was calculated.

Practical Ways to Improve Your Credit Scores

The most effective improvements usually come from consistent habits rather than quick fixes.

  • Pay every account on time: Set up automatic payments for at least the minimum due, then pay more manually when possible. Automatic payments help prevent missed due dates, but check that enough money is available in the account.
  • Reduce card balances: Pay down high-interest cards first if you are trying to save money, or reduce cards with the highest utilization if your immediate goal is lowering reported balances. Card issuers commonly report balances around the statement closing date, so paying before that date may reduce the balance shown on your credit report.
  • Check your credit reports: Review reports from Equifax, Experian and TransUnion for incorrect late payments, accounts you do not recognize, duplicate debts or inaccurate balances. You can request free reports through AnnualCreditReport.com. Dispute errors with both the bureau and the company that supplied the information.
  • Limit unnecessary applications: Compare offers and apply selectively. When shopping for certain mortgages, auto loans or student loans, multiple inquiries made within a limited period may be treated as one inquiry by some scoring models, but rules vary.
  • Keep useful accounts open: Avoid closing an older card automatically if it has no annual fee and you can manage it responsibly. If the card encourages overspending or carries a costly fee, closing it may still be reasonable.
  • Use secured credit carefully: A secured credit card can help establish or rebuild credit because it is backed by a refundable deposit. Choose an account that reports to the major credit bureaus, keep the balance low and confirm fees before applying.

Be cautious with companies promising an immediate score increase or guaranteed removal of accurate negative information. Accurate negative information generally cannot be legally erased simply because it is unfavorable. Time, on-time payments and lower balances are usually the most reliable path to improvement.

How to Monitor Your Credit

Checking your own credit score does not normally hurt your score. You can monitor a score through a card issuer, bank or reputable financial service, but remember that the number may differ from scores used for a specific application.

Monitoring your credit report is equally important. A score may alert you to a change, but the report shows the underlying account details. Consider using alerts for new accounts, balance changes and payment due dates. If you find possible identity theft, contact the creditor, dispute the account with the credit bureaus and report the incident at IdentityTheft.gov.

Credit scores can change as lenders report new balances, payments and account activity. A temporary drop does not necessarily mean your financial situation has permanently worsened. Focus on paying on time, borrowing only what you can afford and reviewing your reports regularly.