Credit is a loan you repay with interest, and lenders use your history to decide whether to lend to you

When you use credit, you are borrowing money from a lender with the agreement that you will pay it back, usually with an extra charge called interest. The lender decides whether to lend to you based on your credit history—a record of how you have borrowed and repaid money in the past. If you have paid bills on time, lenders see you as lower risk and may offer better terms. If you have missed payments or defaulted, lenders see you as higher risk and may charge more interest or decline to lend at all.

Credit works because both sides benefit: you get money or goods now instead of waiting to save, and the lender earns interest on the money they lend out. But credit also costs you. The interest you pay is the price of borrowing, and it can add up quickly if you carry a balance or miss payments.

Key Takeaways

  • Credit is borrowed money that you repay over time, and lenders charge interest as the cost of lending.
  • Your credit history—a record of past loans, payments, and defaults—determines whether lenders will lend to you and at what interest rate.
  • Credit scores, which range from 300 to 850, are calculated from your payment history, amounts owed, length of credit history, credit mix, and new credit inquiries.
  • Missing payments damages your credit score and can lead to higher interest rates, loan denials, and collection action.
  • Building credit takes time and requires consistent on-time payments, keeping balances low, and using different types of credit responsibly.

How lenders decide whether to lend to you

When you ask for credit—whether a credit card, auto loan, or mortgage—the lender pulls your credit report from one of three major bureaus: Equifax, Experian, or TransUnion. This report lists every loan you have taken, every payment you have made or missed, and any accounts sent to collection. The lender also calculates your credit score, a three-digit number between 300 and 850 that summarizes your creditworthiness.

Lenders use this information to answer two questions: Will you repay this loan? If so, at what interest rate should we charge you? A score above 670 is generally considered good, and scores above 740 are considered very good. But the exact cutoff varies by lender and loan type. A mortgage lender may require a score of 620 or higher, while a credit card issuer might require 650 or higher. If your score is below the lender's minimum, you will be denied. If your score is above it, you will be offered a rate based on how much risk the lender thinks you represent.

What goes into your credit score

Your credit score is built from five categories of information on your credit report. Payment history (35 percent of your score) is the largest factor—it measures whether you have paid bills on time. A single late payment can lower your score by 100 points or more, and the damage lasts for seven years. Amounts owed (30 percent) measures how much of your available credit you are using. If you have a credit card with a $5,000 limit and a $4,500 balance, you are using 90 percent of your limit, which signals risk. Lenders prefer to see you using less than 30 percent.

Length of credit history (15 percent) rewards you for having accounts open for a long time. Closing old accounts can hurt this factor. Credit mix (10 percent) means having different types of credit—a credit card, an auto loan, a mortgage—shows you can manage different kinds of debt. New credit inquiries (10 percent) tracks how often you have recently applied for new credit. Each application triggers a hard inquiry, which lowers your score slightly. Multiple inquiries in a short time signal desperation and raise risk.

How interest rates work

Interest is the cost of borrowing, expressed as a percentage of the amount you owe. If you borrow $1,000 at 10 percent annual interest, you owe $100 per year in interest alone. On a credit card, interest is usually calculated daily and added to your balance monthly. If you carry a $1,000 balance on a card with 20 percent annual interest, you will owe roughly $20 in interest that month (the exact amount depends on the number of days in the month and your card's specific terms).

Your credit score directly affects the interest rate you are offered. A borrower with a score of 750 might be offered a car loan at 4 percent, while a borrower with a score of 620 might be offered the same loan at 8 percent. Over five years, that difference adds thousands of dollars to the cost of the loan. This is why building your credit score is worth the effort—better credit saves you real money.

What happens when you miss a payment

Missing a payment triggers a chain of consequences. After 30 days, the missed payment appears on your credit report and your score drops. After 60 days, the lender may charge you a late fee. After 90 days, the account is reported as seriously delinquent and your score drops further. After 120 to 180 days, the lender may charge off the account—meaning they write it off as a loss and sell the debt to a collection agency.

Once an account is in collection, a collection agency contacts you to recover the debt. They can sue you, garnish your wages, or place a lien on your property, depending on your state's laws and the amount owed. A collection account stays on your credit report for seven years from the date of first delinquency, even if you pay it off. The damage to your score is severe: a collection account can lower your score by 100 to 200 points.

How to build and maintain good credit

Building credit takes time and consistency. If you have no credit history, start with a secured credit card, which requires a cash deposit (usually $200 to $2,500) that becomes your credit limit. Use it for small purchases, pay the full balance every month, and after 6 to 18 months of on-time payments, the card issuer may convert it to a regular card and return your deposit. Alternatively, ask a family member with good credit to add you as an authorized user on their account—you inherit their payment history without taking on debt.

Once you have credit, the rules are simple: pay every bill on time, every month. Set up automatic payments for at least the minimum due so you never miss a deadline. Keep your credit card balances below 30 percent of your limits. Do not close old accounts, even if you are not using them—the age of your accounts helps your score. Avoid applying for multiple new accounts in a short time. Check your credit report once a year (you can get a free report from annualcreditreport.com) and dispute any errors you find.

The difference between hard and soft inquiries

When you apply for credit, the lender performs a hard inquiry (also called a hard pull), which appears on your credit report and lowers your score by a few points. Hard inquiries stay on your report for two years but stop affecting your score after about three to six months. Multiple hard inquiries within 14 to 45 days (depending on the scoring model) usually count as a single inquiry, so shopping for a mortgage or auto loan in a short window does not damage your score as much as applying for multiple credit cards.

A soft inquiry (soft pull) happens when you check your own credit, when a lender pre-screens you for an offer, or when an employer checks your credit. Soft inquiries do not appear on your credit report and do not affect your score. You can check your own credit as often as you want without penalty.

Frequently Asked Questions

How long does it take to build a credit score?

You need at least six months of credit history to generate a score. Most scoring models require three to six months of activity on an account before it is included in your score calculation. Building good credit—a score above 700—typically takes one to two years of consistent on-time payments and low balances.

Can I improve my credit score if I have missed payments?

Yes, but it takes time. The impact of a missed payment decreases over time. After two years, it affects your score much less. After seven years, it falls off your report entirely. In the meantime, focus on paying every bill on time going forward and keeping your balances low. Lenders care more about recent behavior than old mistakes.

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

Your credit report is a detailed record of your borrowing and payment history maintained by the three credit bureaus. Your credit score is a three-digit number calculated from the information in your report. You can have a credit report without a score (if you have no credit history), but you cannot have a score without a report.

Does checking my own credit hurt my score?

No. Checking your own credit is a soft inquiry and does not affect your score. You can check your credit report once per year for free at annualcreditreport.com, and you can check your score through your bank, credit card issuer, or a free service like Credit Karma without penalty.

Why did my credit score drop even though I paid my bills on time?

Several things can lower your score without a missed payment: paying down a large balance (which changes your credit utilization ratio), closing an old account, a hard inquiry from a new application, or an error on your credit report. Check your report at annualcreditreport.com to see what changed and dispute any errors.