Your credit score affects more of your financial life than almost any other number. It can decide whether you are approved for a mortgage, car loan, or credit card — and how much interest you pay. In some places it can even affect your insurance premiums and whether a landlord accepts your rental application.
Yet many people don’t know how credit scores are actually calculated. This guide explains the five factors behind the most widely used scoring model, what counts as a good score, and practical steps to improve yours.
What Is a Credit Score?
A credit score is a three-digit number that estimates how likely you are to repay borrowed money on time. Lenders use it to judge risk quickly. In the United States, the most widely used scores are FICO® Scores and VantageScore®, and both typically range from 300 to 850.
Your score is calculated from the information in your credit reports, which are maintained by the three major credit bureaus: Equifax, Experian, and TransUnion. Because each bureau may hold slightly different information, your score can vary a little between them.
What Is a Good Credit Score?
FICO commonly groups scores into these ranges:
| FICO Score range | Rating |
|---|---|
| 800–850 | Exceptional |
| 740–799 | Very good |
| 670–739 | Good |
| 580–669 | Fair |
| 300–579 | Poor |
Each lender sets its own standards, but a score in the “good” range or higher generally gives you access to more products and better interest rates.
The 5 Factors That Make Up Your FICO Score
FICO publishes the general weight each category carries for most people:
1. Payment history (about 35%)
This is the single most important factor. It shows whether you have paid your credit accounts on time. Late payments, collections, and bankruptcies all hurt your score. A payment that is 30 or more days late can cause a significant drop and may stay on your report for up to seven years.
What helps: Paying every bill on time, every month. Setting up automatic minimum payments is one of the simplest ways to protect this part of your score.
2. Amounts owed (about 30%)
This looks at how much you owe, especially on revolving accounts like credit cards. The key measure is your credit utilization ratio — the percentage of your available credit that you are using.
For example, if you have a total credit limit of $10,000 across your cards and a combined balance of $3,000, your utilization is 30%.
What helps: Keeping utilization low. A common guideline is to stay below 30%, and people with the highest scores often use less than 10%. Paying your balance before the statement date can lower the balance that gets reported.
3. Length of credit history (about 15%)
This considers how long you have had credit, including the age of your oldest account, your newest account, and the average age of all accounts.
What helps: Keeping older accounts open, especially cards with no annual fee, so your credit history stays long.
4. New credit (about 10%)
Opening several new accounts in a short period can signal higher risk. Each application for credit typically results in a hard inquiry, which may lower your score slightly for a short time.
What helps: Applying for new credit only when you need it. When shopping for a mortgage or auto loan, scoring models generally treat multiple inquiries within a short window as a single inquiry, so compare rates within a few weeks.
5. Credit mix (about 10%)
Lenders like to see that you can manage different types of credit, such as credit cards (revolving credit) and installment loans like car loans, student loans, or mortgages. If student loans are part of your mix, see our student loan repayment strategies.
What helps: A healthy mix develops naturally over time. There is no need to take out a loan just to improve this factor.
What Does NOT Affect Your Credit Score
- Your income or salary
- Your job title or employer
- Your age, race, religion, gender, or marital status
- Checking your own credit (a “soft inquiry”)
- Your bank account balances
- Utility and rent payments, unless they are reported to the credit bureaus or you use a service that adds them
How to Check Your Credit Report
In the United States, you can get free credit reports from all three bureaus at AnnualCreditReport.com, the official site authorized by federal law. Many banks and credit card companies also show your credit score for free in their apps.
When you review your report, look for:
- Accounts you don’t recognize, which could signal identity theft
- Late payments that you believe were on time
- Incorrect balances or credit limits
- Old negative items that should have been removed
If you find an error, you can dispute it directly with the credit bureau that reported it. They are generally required to investigate.
How to Improve Your Credit Score
- Pay on time, every time. Set up autopay or reminders for every account.
- Lower your credit card balances. Focus on reducing utilization, especially on cards near their limits.
- Ask for a credit limit increase. A higher limit with the same balance lowers your utilization — just don’t spend more.
- Keep old accounts open. Closing your oldest card can shorten your credit history and raise utilization.
- Limit new applications. Space out applications for new credit.
- Dispute errors. Removing a mistake can raise your score quickly.
- Be patient. Negative items lose impact over time, and consistent good habits steadily improve your score.
How Your Credit Score Affects What You Pay
A higher score doesn’t just help you get approved — it can save you a great deal of money. Borrowers with strong credit usually qualify for lower interest rates on mortgages, car loans, and personal loans. Over the life of a 30-year mortgage, even a small difference in rate can add up to thousands of dollars. In some places, your credit history can even affect car insurance premiums.
If you are planning to buy or refinance a home, read our guides to getting approved for a mortgage and mortgage refinance rates, both of which explain how credit influences your loan terms. Homeowners thinking about borrowing against their property can also compare HELOCs vs home equity loans.
Frequently Asked Questions
How long does it take to improve a credit score?
Some changes, like paying down card balances, can show up within a month or two once the new balance is reported. Recovering from serious problems such as missed payments or collections usually takes longer.
Does checking my own score lower it?
No. Checking your own credit is a soft inquiry and has no effect on your score.
Why is my score different on different apps?
There are many scoring models and versions, and each bureau may have slightly different data. Small differences between sources are normal.
How long do late payments stay on my report?
In the United States, most negative information, including late payments, can remain on your credit report for up to seven years, though its impact on your score fades over time.
Final Thoughts
Credit scores may seem mysterious, but they are built on a few simple habits: paying on time, keeping balances low, maintaining a long credit history, applying for new credit sparingly, and managing different types of credit responsibly. Focus on payment history and utilization first — together they make up roughly two-thirds of your FICO Score.
If you are starting with little or no credit history, our upcoming guide on how to build credit from scratch covers the best first steps.
This article is for general educational purposes and is not financial advice. Scoring details can vary by model and country.