What a credit score actually measures
A credit score is a three-digit number that lenders use to predict whether you will repay borrowed money on time. It is not a measure of how much money you have, how responsible you are in general, or how well you manage your finances outside of borrowing. It is specifically a record of your behaviour with debt.
The three major credit bureaus — Equifax, Experian, and TransUnion — collect this data from lenders, creditors, and public records. When you borrow money or use credit, the lender reports your payment history to these bureaus. Over time, that history becomes your credit file, and the bureaus use mathematical models to turn that file into a score.
The most common scoring model is called FICO, which ranges from 300 to 850. A score above 670 is generally considered good; above 740 is very good; above 800 is excellent. Lenders use these ranges to decide whether to lend to you, how much interest to charge, and what terms to offer. A higher score usually means lower interest rates and better terms.
Key Takeaways
- Your credit score is built from five categories of data: payment history (35 percent), amounts owed (30 percent), length of credit history (15 percent), credit mix (10 percent), and new credit inquiries (10 percent).
- Payment history is the single largest factor — a single missed payment can lower your score by 100 points or more, and the damage lasts for years.
- You do not need to carry a balance or pay interest to build credit; paying off your full statement balance each month is the fastest way to build a good score.
- You can obtain a free copy of your credit report from each bureau once per year at annualcreditreport.com, and checking it regularly helps you catch errors and fraud.
- Building good credit takes time — typically 6 months to 2 years of consistent on-time payments — but the interest savings compound over a lifetime of borrowing.
The five factors that make up your score
Payment history accounts for 35 percent of your score. This is whether you paid your bills on time, how late you were if you missed a payment, and how recently the missed payments occurred. A payment 30 days late damages your score less than one 90 days late. A missed payment from two years ago damages your score less than one from two months ago. Payments that are current and on time build your score steadily.
Amounts owed accounts for 30 percent. This is the total balance you carry across all credit accounts, compared to your total credit limits — a ratio called your utilization rate. If you have a credit card with a $5,000 limit and a $1,500 balance, your utilization on that card is 30 percent. Lenders prefer to see utilization below 30 percent across all cards combined. High utilization signals that you are relying heavily on credit, which increases risk in a lender's eyes.
Length of credit history accounts for 15 percent. This is how long your oldest account has been open and the average age of all your accounts. Older accounts help your score; closing old accounts can hurt it by lowering your average age. This is why keeping old credit cards open, even if you do not use them, can help your score over time.
Credit mix accounts for 10 percent. This is the variety of credit types you use — credit cards, auto loans, mortgages, student loans, and so on. Lenders want to see that you can manage different kinds of debt responsibly. You do not need to take out loans you do not need to build mix; if you already have a credit card and a car loan, you have mix.
New credit inquiries account for 10 percent. When you explore for new credit, the lender pulls your credit report, creating a hard inquiry that lowers your score slightly. Multiple hard inquiries in a short time signal that you are desperately seeking credit, which raises risk. Soft inquiries — when you check your own score or a company checks your credit for a pre-approval offer — do not affect your score.
How to build credit from scratch
If you have no credit history, lenders have no data to assess. The fastest way to start is to open a credit card and use it responsibly. If you cannot get a standard credit card because you have no history, a secured credit card is designed for this situation. You deposit cash as collateral — typically $200 to $2,500 — and the card issuer gives you a credit line equal to that deposit. You use the card like a normal card, make on-time payments, and after 6 to 18 months of good behaviour, the issuer converts it to a standard card and returns your deposit.
Another path is to become an authorized user on someone else's credit card. If a family member or trusted friend adds you to their account, their payment history and credit limits may be reported under your name, building your history without you having to open your own account. This only works if the primary account holder pays on time; if they miss payments, your score suffers too.
A third option is a credit-builder loan, offered by some credit unions and online lenders. You borrow a small amount — usually $500 to $1,000 — and the lender holds the money in a savings account while you make monthly payments. Once you finish paying, you get the money back. The lender reports your payments to the credit bureaus, building your history, and you pay interest on money you already have. It costs money, but it works.
Whichever path you choose, the rule is the same: use credit, make on-time payments, and keep balances low. After 6 months of consistent behaviour, you should see your score begin to rise.
Why paying off your balance matters more than you think
Many people believe they need to carry a balance on a credit card and pay interest to build credit. This is false. Paying off your full statement balance each month is actually the fastest way to build credit because it demonstrates that you can borrow and repay reliably without defaulting.
Here is how it works: each month, your card issuer reports your statement balance to the credit bureaus. If you pay that balance in full by the due date, you pay no interest and your on-time payment is recorded. If you carry a balance into the next month, you pay interest, but the payment is still recorded as on-time. The credit bureaus do not know or care whether you paid interest; they only see that you paid on time.
The reason to avoid carrying a balance is financial, not credit-related. Carrying a balance costs you money in interest and raises your utilization ratio, both of which are bad for your score. Paying in full costs you nothing and keeps your utilization low, which is good for your score. There is no credit-building benefit to paying interest.
How to fix errors and dispute inaccurate information
Your credit report is a record maintained by a private company, not a government agency, and errors happen. A payment might be reported late when you paid on time. An account might be listed twice. A debt might be reported under your name when it belongs to someone else. These errors can lower your score unfairly.
You can obtain a free copy of your credit report from each of the three bureaus once per year at annualcreditreport.com, which is the official site run by the bureaus themselves. (Beware of sites with similar names that charge fees or try to sell you credit monitoring.) Check all three reports because they may contain different information.
If you find an error, you can dispute it directly with the bureau that reported it. Write a letter or submit a dispute online explaining what is wrong and why. Include copies of documents that support your claim — a bank statement showing you paid on time, a letter from the creditor, a police report if it is fraud. The bureau must investigate within 30 days and remove the information if it cannot verify it.
If the error is the creditor's fault — they reported a late payment that was actually on time — you can also dispute it with the creditor directly. Send a written dispute with supporting documents. Creditors are required to investigate and correct errors.
What happens when you miss a payment or default
A missed payment damages your score when ready and the damage lasts for years. A payment 30 days late typically lowers your score by 60 to 100 points. A payment 90 days late lowers it by 130 to 200 points. The older the missed payment, the less it damages your score, but it remains on your report for seven years from the date of the missed payment.
If you miss a payment, contact the creditor as soon as you realize it. Many creditors will work with you if you call before the payment is reported as late. Some will accept a partial payment or a payment plan. Once a payment is reported as late, the damage is done, but catching up quickly prevents further damage.
If a debt goes unpaid for 180 days (six months), the creditor typically writes it off as a loss and may sell it to a debt collector. At that point, the debt is reported as a charge-off on your credit report, which is far more damaging than a late payment. A charge-off can lower your score by 200 points or more and stays on your report for seven years. Avoiding charge-off is critical.
If you are struggling to pay, contact your creditor before you miss a payment. Many offer hardship programs, payment plans, or temporary forbearance. These options do not damage your credit the way a missed payment does.
How long it takes to build and rebuild credit
Building credit from scratch typically takes 6 months to 2 years, depending on the method you choose. A secured card or credit-builder loan can show results in 6 months. Becoming an authorized user can show results in weeks if the primary account holder has good credit. The key is consistency — on-time payments every month, low balances, and no new hard inquiries.
Rebuilding credit after damage takes longer. A single late payment stops damaging your score after about two years, but it remains on your report for seven years. A charge-off or collection account damages your score for seven years. However, the damage decreases over time. A late payment from six months ago hurts your score more than one from three years ago. This means that consistent on-time payments after a missed payment will gradually rebuild your score, even though the missed payment is still visible on your report.
Bankruptcy is the most severe credit event and stays on your report for 7 to 10 years depending on the type. However, even after bankruptcy, you can rebuild credit by obtaining a secured card and making on-time payments. Many people rebuild their score to 650 or higher within two years of bankruptcy discharge.
Monitoring your credit and protecting against fraud
Checking your own credit score does not lower it — only hard inquiries from lenders do. You can check your score for free through your credit card issuer, your bank, or free services like Credit Karma or Experian's website. Checking your score regularly helps you track your progress and catch fraud early.
Fraud happens when someone opens accounts in your name without your permission or uses your existing accounts without authorization. This can happen through identity theft, data breaches, or social engineering. Fraudulent accounts damage your score and can create debt you do not owe.
To protect yourself, check your credit report at least once per year for accounts you do not recognize. If you find fraud, place a fraud alert with one of the three bureaus — they will notify the other two automatically. A fraud alert requires creditors to verify your identity before opening new accounts in your name. You can also place a credit freeze, which prevents anyone from accessing your credit report without your permission. Both are free.
Frequently Asked Questions
Does checking my credit score hurt it?
No. Checking your own score is a soft inquiry and does not affect your score. Only hard inquiries from lenders when you explore for credit lower your score. You can check your score as often as you want without penalty.
How much does my score improve after I pay off a credit card?
It depends on how much you owed and what your utilization was before. Paying off a card that was at 80 percent utilization and bringing it to zero can raise your score by 40 to 100 points within a month. The improvement is larger the higher your previous utilization was.
Should I close old credit cards to lower my utilization?
No. Closing a card lowers your available credit, which raises your utilization ratio on remaining cards, and it shortens your average account age, both of which hurt your score. Keep old cards open and use them occasionally to keep them active.
Can I remove a late payment from my credit report before seven years?
You can dispute it if it is inaccurate, but if it is accurate, it will remain for seven years. You cannot force the bureau to remove accurate information. However, some creditors will remove a late payment as a goodwill gesture if you have a good payment history otherwise and you ask in writing.
What is a good credit score to get a mortgage or car loan?
Most lenders require a score of at least 620 for a mortgage and 660 for a car loan, but better rates are available at 740 and above. The exact requirement varies by lender and loan type. FHA mortgages have lower score requirements than conventional mortgages.