Your credit score is built from five measurable pieces of your borrowing history

A credit score is a three-digit number that lenders use to decide whether to lend you money and at what interest rate. The most common score is the FICO score, which ranges from 300 to 850. It is calculated by looking at five specific categories of information from your credit report: payment history, amounts owed, length of credit history, credit mix, and new credit inquiries. Each category carries a different weight in the final number.

The score is not a judgment of your character or your income. It is purely a mathematical calculation based on what lenders report about how you have borrowed and repaid money in the past. Understanding how each piece works helps you see where changes in your behavior will have the biggest impact on your score.

Key Takeaways

  • Payment history makes up 35 percent of your score, so a single missed payment can lower it by dozens of points, while on-time payments build it back up over months.
  • The amount you owe on credit cards and loans (called utilization) counts for 30 percent, and using less than 30 percent of your available credit limit helps more than paying off the full balance each month.
  • How long you have held credit accounts matters for 15 percent of your score, which is why closing old accounts can hurt even if you no longer use them.
  • Having different types of credit—credit cards, car loans, mortgages—adds 10 percent to your score, while opening many new accounts in a short time can lower it by 10 to 15 points.
  • Your credit report may contain errors, and disputing them with the credit bureau can raise your score without changing your actual borrowing behavior.

Payment history: 35 percent of your score

Payment history is the single largest factor in your credit score. It measures whether you paid your bills on time. A payment is considered late if it arrives 30 days or more after the due date. The credit bureaus—Equifax, Experian, and TransUnion—record every late payment and report it to lenders.

One missed payment can drop your score by 100 points or more, depending on how high your score was before. A payment that is 30 days late hurts less than one that is 90 days late. Payments that go to collections or result in a lawsuit hurt the most. The impact of a late payment fades over time: a late payment from two years ago hurts less than one from two months ago, and after seven years it stops appearing on your credit report entirely.

If you have a history of on-time payments, one late payment will lower your score, but consistent on-time payments afterward will rebuild it. There is no fixed timeline—it depends on how high your score was and how many other late payments are on your report—but most people see improvement within three to six months of returning to on-time payments.

Amounts owed: 30 percent of your score

The second-largest factor is how much money you currently owe compared to how much credit is available to you. This is called credit utilization. If you have a credit card with a $5,000 limit and you carry a $1,500 balance, your utilization on that card is 30 percent. If you have multiple cards, the bureaus look at your total utilization across all of them.

Using less than 30 percent of your available credit is better for your score than using more. Using less than 10 percent is even better. However, using zero percent—meaning you have no balance at all—is not better than using 10 percent. Lenders want to see that you can borrow and repay responsibly, not that you never borrow.

Paying down a credit card balance lowers your utilization when ready. If you pay your full balance every month, your utilization will be zero on your statement date, which is when the credit bureaus receive the report. This is why some people with perfect payment histories still have lower scores than they expect: if they carry a high balance even though they pay on time, their utilization is high.

Length of credit history: 15 percent of your score

How long you have been using credit matters for 15 percent of your score. The bureaus look at the age of your oldest account, the age of your newest account, and the average age of all your accounts. A longer history is better because it shows lenders you have managed credit over time.

This is why closing an old credit card can lower your score even if you never use it anymore. When you close the account, it stops aging, and your average account age may drop. The account will eventually fall off your credit report after 10 years of being closed, which will lower your score further at that moment.

If you are young or new to credit, you cannot change this factor quickly—it only improves with time. If you have old accounts, keeping them open (even unused) helps your score more than closing them, as long as there are no annual fees you are paying.

Credit mix: 10 percent of your score

Credit mix means having different types of credit accounts. The two main types are revolving credit (credit cards and lines of credit, where you can borrow, repay, and borrow again) and installment credit (car loans, personal loans, and mortgages, where you borrow a fixed amount and repay it in equal monthly payments).

Having both types of credit on your report is better for your score than having only one type. However, credit mix is only 10 percent of your score, so you should not open a loan or credit card just to improve this factor. If you already have a credit card and a car loan, you have a healthy mix.

Opening new accounts specifically to improve your mix will likely hurt your score more than it helps, because new accounts lower your average age and trigger a hard inquiry (see below).

New credit inquiries: 10 percent of your score

When you explore for credit—a credit card, a car loan, a mortgage—the lender checks your credit report. This is called a hard inquiry. Each hard inquiry can lower your score by a few points. Multiple hard inquiries in a short time can lower it by 10 to 15 points.

Hard inquiries stay on your credit report for two years, but they stop affecting your score after about three months. If you are shopping for a mortgage or car loan, multiple inquiries within 14 to 45 days (depending on the scoring model) are usually counted as a single inquiry, because lenders know you are rate shopping.

Checking your own credit report does not lower your score—that is called a soft inquiry and does not appear to lenders. You can check your own credit report once per year for free at annualcreditreport.com, which is the official site run by the three credit bureaus.

How the bureaus collect and report your information

The three major credit bureaus—Equifax, Experian, and TransUnion—collect information from lenders, creditors, and public records. Lenders report your account balance, payment history, and credit limit to the bureaus each month. Courts report lawsuits, liens, and judgments. Collection agencies report accounts they are trying to collect on.

Each bureau may have slightly different information, which is why your score can vary between them. A lender might report to all three bureaus, or to only one or two. If you have a dispute with one bureau, it does not automatically update at the others.

Your credit report is not the same as your credit score. Your report is a record of your borrowing history. Your score is a number calculated from that report. You can have a report without a score (if you have no credit history), but you cannot have a score without a report.

Errors on your credit report and how to dispute them

Credit reports contain errors more often than many people realize. A payment might be reported as late when you paid on time. An account might be listed twice. A debt might be reported by a collection agency even though you already paid it. These errors can lower your score unfairly.

You can dispute an error by contacting the credit bureau in writing. The bureau must investigate your dispute within 30 days and remove the information if it cannot verify it. You can also contact the lender or creditor that reported the error and ask them to correct it. If the lender corrects the information, they must tell the bureaus to update their records.

Disputing an error does not lower your score. If the dispute is successful and the error is removed, your score may rise. Getting errors removed is one of the few ways to improve your score without changing your actual borrowing behavior.

Frequently Asked Questions

Does paying off all my credit card debt at once raise my score?

Paying off debt lowers your utilization, which will raise your score. However, the timing matters: if you pay off the balance after the statement date, the credit bureaus will not see the lower balance until the next month. Paying off the balance before your statement date is reported is more effective.

How long does it take to build a credit score from zero?

You need at least one account that has been open for six months with activity reported to the bureaus before a score is calculated. Most scoring models require six months of history. After that, your score will be low, but it will start to improve with on-time payments and low utilization.

Will checking my own credit hurt my score?

No. Checking your own credit report or score is a soft inquiry and does not lower your score. You can check your report once per year for free at annualcreditreport.com without any impact.

Can I have different scores from different bureaus?

Yes. Each bureau may have different information about you, so they calculate different scores. A lender might report to only one or two bureaus, or report different information to each one. Your score can vary by 50 points or more between bureaus.

How much does a hard inquiry lower my score?

A single hard inquiry typically lowers your score by a few points. Multiple inquiries in a short time can lower it by 10 to 15 points. The impact fades after three months and disappears after two years.