How Your Credit Score Works and Why It Matters

What a credit score is and why lenders look at it

A credit score is a three-digit number that lenders use to decide whether to lend you money and what interest rate to charge. The number comes from your credit history — a record of how you have borrowed and repaid money over time. The higher your score, the lower the risk you look to a lender.

Lenders pull your credit score when you explore for a mortgage, car loan, credit card, or personal loan. Some employers and landlords also check it. The score itself is calculated by credit bureaus — Equifax, Experian, and TransUnion are the three major ones — based on information they collect about your payment history, how much debt you carry, and how long you have had credit accounts open.

Your score matters because it directly affects the terms you get offered. A higher score can mean a lower interest rate on a mortgage, which saves you tens of thousands of dollars over the life of the loan. A lower score might mean you are charged a higher rate, denied credit altogether, or asked to pay a deposit before a utility company will serve you.

Key Takeaways

• Credit scores range from 300 to 850, and most lenders consider 670 and above to be good credit.
• Your payment history — whether you pay bills on time — makes up the largest part of your score, followed by how much debt you currently owe.
• You can obtain a free copy of your credit report from each of the three major bureaus once per year at annualcreditreport.com.
• Errors on your credit report can lower your score unfairly, and you have the right to dispute them in writing with the bureau.
• Building credit takes time, but consistent on-time payments and keeping debt balances low will steadily raise your score over months and years.

The five factors that make up your credit score

Credit bureaus calculate your score using five categories of information. Payment history — whether you pay your bills on time — accounts for about 35 percent of your score. A single late payment can lower your score, and the later the payment, the bigger the damage. Payments that are 30 days late hurt more than payments that are 10 days late, and accounts sent to collections hurt the most.

Credit utilization — how much of your available credit you are currently using — makes up about 30 percent. If you have a credit card with a $5,000 limit and a $4,500 balance, your utilization is 90 percent, which lowers your score. Keeping balances below 30 percent of your limit is generally better for your score.

The remaining 35 percent comes from three other factors: length of credit history (about 15 percent), which rewards you for having accounts open for a long time; credit mix (about 10 percent), which means having different types of credit like credit cards, car loans, and mortgages; and new credit inquiries (about 10 percent), which can temporarily lower your score when you explore for new credit.

How to check your credit report and spot errors

You are may have access to to one free credit report per year from each of the three major bureaus. Go to annualcreditreport.com, which is the official site run by the bureaus themselves. You can request all three reports at once or space them out throughout the year. The site will ask you to verify your identity by answering questions about your financial history.

When you receive your report, read it carefully. Look for accounts you do not recognize, payments marked as late that you know you made on time, duplicate entries, or accounts that should have been closed. Errors are common — a payment might be reported to the wrong account, a closed account might still show as open, or someone else's information might appear on your report by mistake.

If you find an error, write a letter to the bureau that issued the report. Include a copy of the report, circle the error, explain what is wrong, and include any documentation you have (like a cancelled check or a bank statement showing you paid on time). Send it certified mail so you have proof of delivery. The bureau must investigate within 30 days and remove the error if they cannot verify it.

Building credit from scratch or rebuilding after damage

If you have no credit history, the fastest way to start is with a secured credit card. You deposit money with a bank — typically $200 to $2,500 — and the bank gives you a credit card with a limit equal to your deposit. You use the card for small purchases and pay the bill in full each month. After six to twelve months of on-time payments, the bank may convert it to a regular card and return your deposit.

If you have damaged credit from late payments or collections, the same approach works: use a secured card or a regular card with a low limit, charge small amounts, and pay in full each month. Every on-time payment raises your score a little. Late payments stay on your report for seven years, but their impact fades over time — a late payment from five years ago hurts less than one from last month.

Avoid the temptation to close old accounts once you have paid them off. An old account with a zero balance still helps your score by increasing your average account age and lowering your overall utilization rate. Closing it removes those benefits and can actually lower your score.

What to do about collections, charge-offs, and other serious damage

A collection account appears on your report when a creditor gives up trying to collect a debt and sells it to a debt collector. A charge-off is when a creditor writes off the debt as a loss but may still pursue you for payment. Both are serious and stay on your report for seven years from the date you first missed the payment.

If you have a collection account, you have options. You can pay the debt in full, pay a settlement for less than the full amount (if the collector agrees), or set up a payment plan. Some collectors will agree to "pay for delete" — removing the account from your report in exchange for payment — though this is less common now. Whatever you do, get any agreement in writing before you pay.

Paying a collection account does not remove it from your report, but it does change the status to "paid" or "settled," which looks better to lenders than "unpaid." The account still counts against you, but less severely. If you cannot pay, focus on building positive credit with other accounts — on-time payments on a credit card or loan will gradually outweigh the collection account as it ages.

Monitoring your score and understanding score ranges

Credit scores range from 300 to 850. Most lenders consider 670 and above to be good credit, though the exact cutoff varies by lender and loan type. A mortgage lender might require 620, while a credit card issuer might require 700. Here is a rough breakdown: below 580 is considered poor; 580 to 669 is fair; 670 to 739 is good; 740 to 799 is very good; and 800 and above is excellent.

You can check your score for free through many banks and credit card companies — log into your account and look for a credit score section. Websites like Credit Karma and Credit Sesame also offer free scores. These free scores are usually VantageScore or educational scores, not the exact FICO score a lender will see, but they move in the same direction and give you a useful picture of where you stand.

Check your score a few times a year to track your progress. You should see it rise gradually as you pay bills on time and pay down debt. If it drops suddenly, check your credit report for errors or new negative items. Small fluctuations month to month are normal and usually not a cause for concern.

Common mistakes that hurt your score

Paying late is the most damaging mistake. Even a payment that is 30 days late can lower your score by 100 points or more. Set up automatic payments for at least the minimum due, or set a phone reminder a few days before the due date. If you are struggling to pay, contact your lender before you miss a payment — many will work with you on a temporary payment plan.

Maxing out credit cards hurts your score twice: once because you have a late payment if you cannot pay the full balance, and again because your utilization is very high. If you need to carry a balance, try to keep it below 30 percent of your limit. Paying down balances is one of the fastest ways to raise your score.

Closing old accounts or cancelling credit cards might seem like a good idea, but it can lower your score by reducing your available credit and shortening your average account age. Keep old accounts open even after you pay them off. Closing a card should be a last resort, not a first step.

Frequently Asked Questions

How long does it take to build a good credit score?

Building credit from scratch typically takes six months to a year of consistent on-time payments before you see a meaningful score. Rebuilding after damage takes longer — usually two to three years of good behavior before your score reaches the "good" range. The exact timeline depends on how much damage there was and how actively you are building positive credit.

Does checking my own credit score hurt it?

No. Checking your own credit report or score is a "soft inquiry" and does not lower your score. Only "hard inquiries" — when a lender pulls your credit because you applied for a loan or credit card — can temporarily lower your score. You can check your score as often as you want without penalty.

Can I remove a late payment from my credit report?

Late payments stay on your report for seven years, but you can try to have them removed if they were reported in error. If the payment was actually on time, dispute it with the bureau in writing. If it was genuinely late, you can write a goodwill letter to the creditor asking them to remove it, though they are not required to agree. As the payment ages, its impact on your score decreases.

What is the difference between my credit score and my credit report?

Your credit report is a detailed record of your borrowing and payment history — it lists every account, every payment, and every inquiry. Your credit score is a single number calculated from that report. You can have a good report but a lower score if you have recent late payments, or a report with old negative items that are fading in impact.

Will paying off debt when ready raise my score?

Paying off debt will raise your score over time, but not when ready. Your score is recalculated when the creditor reports the new balance to the bureaus, which usually happens once a month. You should see an improvement within one or two billing cycles, but the full benefit takes a few months as the lower utilization is reflected across multiple reports.