What a credit score is and how lenders use it

A credit score is a three-digit number that summarizes your history of borrowing and repaying money. Lenders use it to decide whether to lend to you, what interest rate to charge, and how much credit to offer. The score ranges from 300 to 850 in the most common model (FICO), though other scoring systems exist. A higher score signals lower risk to a lender.

Your score comes from five pieces of information: payment history (35 percent of the score), amounts you owe relative to your credit limits (30 percent), length of credit history (15 percent), mix of credit types you use (10 percent), and recent credit inquiries or new accounts (10 percent). Each factor pulls the score in a direction based on your actual behaviour — there is no hidden formula or judgment call involved.

Lenders pull your score when you apply for a mortgage, car loan, credit card, or rental agreement. Insurance companies, employers, and landlords may also request it. A low score can mean higher interest rates, smaller loan amounts, or outright rejection. Understanding which factors move your score gives you concrete ways to improve it over time.

Key Takeaways

  • Payment history is the largest factor in your credit score, so missing payments or paying late damages your score more than any other single action.
  • The amount you owe compared to your credit limits (credit utilization) is the second-largest factor, and using less than 30 percent of available credit generally helps your score.
  • You can obtain your credit report free once per year from each of the three major credit bureaus (Equifax, Experian, and TransUnion) at annualcreditreport.com.
  • Errors on your credit report can lower your score unfairly, and you have the right to dispute inaccurate information directly with the bureau that reported it.
  • Building credit takes time; a single missed payment can lower your score by 100 points or more, but the damage fades as you build a longer record of on-time payments.

How payment history shapes your score

Payment history accounts for more than one-third of your credit score. This means whether you pay bills on time matters far more than any other factor. A single late payment — even 30 days late — appears on your credit report and reduces your score. The later the payment, the bigger the damage: 60 days late hurts more than 30 days, and 90 days late hurts more still.

Payments stay on your report for seven years, but their impact weakens over time. A late payment from five years ago affects your score less than one from last month. If you have missed payments in your past, the best action now is to pay all current bills on time going forward. Consistent on-time payments gradually rebuild your score.

Accounts in collections, charge-offs, or bankruptcy also appear in payment history and carry heavy weight. These remain on your report for seven years (ten years for bankruptcy in some cases). If you are behind on payments now, contacting your lender to discuss a payment plan or settlement can prevent these serious marks from appearing.

Credit utilization and how much you owe

Credit utilization is the percentage of your available credit that you are currently using. If you have a credit card with a $5,000 limit and a $1,500 balance, your utilization on that card is 30 percent. This factor accounts for 30 percent of your credit score — second only to payment history.

Lenders view high utilization as a sign of financial strain. Keeping utilization below 30 percent generally helps your score; below 10 percent is even better. This does not mean you should avoid using credit cards. It means paying down balances before the statement closes, or requesting a credit limit increase to lower your utilization ratio without changing how much you spend.

Utilization is calculated per card and across all cards combined. If you have three cards with $2,000 limits each and $1,500 on one card and $0 on the others, your overall utilization is 17 percent (1,500 ÷ 9,000). Spreading balances across multiple cards does not help as much as simply paying them down, but it is better than maxing out a single card.

Checking your credit report for errors

Your credit report is the record that credit bureaus maintain about your borrowing history. It lists every account you have opened, payment records, inquiries from lenders, and negative marks like late payments or collections. Your credit score is calculated from this report, so errors on the report directly harm your score.

You are may have access to to one free credit report per year from each of the three major bureaus: Equifax, Experian, and TransUnion. The official source is annualcreditreport.com, operated by the bureaus themselves. You can request all three reports at once or space them out over the year. Do not use third-party websites that offer "free" reports but require a credit card or sign-up for a paid monitoring service.

When you receive your report, look for accounts you do not recognize, incorrect payment statuses, duplicate entries, or wrong personal information. If you find an error, contact the bureau that issued the report in writing (email or certified mail). Include a copy of the error, an explanation of why it is wrong, and any supporting documents. The bureau must investigate within 30 days and correct or remove the error if it cannot verify it.

Building credit from scratch or after damage

If you have no credit history, lenders have no data to assess your risk. Building credit requires opening accounts and using them responsibly over time. A secured credit card is a common starting point: you deposit money with a bank, and they issue you a card with a credit limit equal to your deposit. Using the card and paying the full balance on time each month builds a positive payment history. After 6 to 18 months of on-time payments, many issuers convert the account to a regular card and return your deposit.

If you have damaged credit from past missed payments or collections, the path is slower but the same: open new accounts if possible, use them sparingly, and pay on time consistently. Each month of on-time payments improves your score. The damage from old negative marks fades gradually; a late payment from two years ago hurts less than one from two months ago.

Becoming an authorized user on someone else's account can also help if that person has good payment history and low utilization. Their positive record may be added to your credit report, boosting your score. However, if they miss payments or carry high balances, it will harm your score as well.

What credit score ranges mean in practice

Credit scores fall into ranges that lenders use to make decisions. A score of 750 or higher is generally considered very good, and you will may have access to for the best interest rates and credit terms. A score between 700 and 749 is good; you will likely be approved for credit but may pay slightly higher rates. A score between 650 and 699 is fair; approval is possible but rates will be noticeably higher, and some lenders may decline you.

Below 650 is considered poor or bad credit. You may struggle to get approved for traditional loans or credit cards. If you are approved, interest rates will be significantly higher. Some lenders specialize in bad-credit borrowing but charge rates that make borrowing expensive. Landlords and employers may also view a low score negatively.

These ranges are not absolute rules; different lenders set their own thresholds. A mortgage lender may require a 620 minimum, while a credit card issuer might require 700. The ranges above reflect common industry practice, but your actual experience depends on the specific lender and the type of credit you are seeking.

Monitoring your score and protecting against fraud

You can check your credit score through your bank or credit card issuer, which often provide free scores to customers. You can also purchase scores directly from the bureaus or use free services like Credit Karma or NerdMoney, which offer estimates based on similar scoring models. These free estimates may differ slightly from the official FICO score a lender sees, but they track the same direction and give you useful information about your standing.

Monitoring your score regularly helps you spot problems early. If your score drops unexpectedly, it may signal fraud — someone using your identity to open accounts or make purchases. Check your credit report immediately if this happens. Look for accounts you did not open or inquiries from lenders you did not contact. If you find fraud, contact the bureau and the creditor, and file a report with the Federal Trade Commission at identitytheft.gov.

Protecting your credit also means guarding your personal information. Do not share your Social Security number, date of birth, or financial account details unless you initiated the contact and trust the recipient. Shred documents with sensitive information, use strong passwords, and monitor your bank and credit card statements regularly for unauthorized charges.

Frequently Asked Questions

How long does it take to improve a credit score?

Improvement depends on what is dragging your score down. On-time payments begin helping immediately, though the effect compounds over months. A single late payment may lower your score by 100 points or more, but the damage fades gradually over two to three years as you build newer positive history. Older negative marks (collections, charge-offs) take longer to stop affecting your score, though their weight decreases after about five years.

Does checking my own credit score hurt it?

No. Checking your own credit report or score is a soft inquiry and does not affect your score. Only hard inquiries — when a lender pulls your report because you applied for credit — can lower your score slightly. Checking your own report at annualcreditreport.com or through your bank has no impact.

Will paying off old debt immediately raise my score?

Paying off debt helps, but the timing matters. Paying off a collection account stops future damage but does not remove the mark from your report. Your score may actually dip slightly when you pay because the account status changes, but it will recover and improve over time. Paying off current balances on credit cards helps more immediately because it lowers your utilization ratio.

Can I remove negative marks from my credit report?

Accurate negative marks cannot be removed before their time is up. Late payments stay for seven years, collections for seven years, and bankruptcy for seven to ten years. However, you can dispute inaccurate information, and you can request that a creditor remove a mark if you negotiate a settlement. Some creditors will agree to remove a negative mark in exchange for payment, though this is not may provide.

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

Your credit report is the detailed record of your borrowing history maintained by the bureaus. Your credit score is a single number calculated from that report. The report contains account details, payment history, and inquiries; the score summarizes your creditworthiness. You can have a good report (accurate information) but a low score (based on that accurate information), or vice versa.