A credit score is a three-digit number that estimates how likely you are to repay borrowed money on time. Lenders use it to decide whether to approve you, how much to lend, and what interest rate to charge. Landlords, utility companies, and insurers sometimes look at it too.
If your score is low, or if you don’t have one yet, the good news is that the calculation is not a mystery. Scores are built from a small number of factors, and most of them respond to habits you can change.
Where your credit score comes from
Your score is calculated from the information in your credit reports, which are kept by the three national credit bureaus: Equifax, Experian, and TransUnion. Lenders and card issuers send the bureaus details about your accounts: when you opened them, your credit limits, your balances, and whether you paid on time.
Scoring companies such as FICO and VantageScore then run that data through their formulas. Because each bureau may have slightly different data, and because there are many versions of each formula, you don’t have just one credit score. You have many. They tend to be close to each other, but rarely identical. (We explain the differences in FICO vs. VantageScore.)
The 5 factors that make up a FICO score
FICO publishes the general weight of each category. VantageScore uses similar categories with slightly different weights.
| Factor | Approximate weight | What it measures |
|---|---|---|
| Payment history | 35% | Whether you pay on time |
| Amounts owed | 30% | How much of your available credit you use |
| Length of credit history | 15% | How long your accounts have been open |
| New credit | 10% | Recent applications and newly opened accounts |
| Credit mix | 10% | The variety of account types you manage |
1. Payment history (about 35%)
This is the single most important factor. Lenders want to know: when you owe money, do you pay it on time?
One payment that is 30 or more days late can do real damage, and the higher your score was before, the further it can fall. Accounts sent to collections, charge-offs, repossessions, and bankruptcies sit in this category too.
What to do: Pay at least the minimum on every account by the due date, every month. Set up autopay for the minimum so a busy week doesn’t cost you points.
2. Amounts owed (about 30%)
This factor looks at how much debt you carry compared with your limits. The most visible piece is credit utilization: your card balances divided by your credit limits. Using a large share of your available credit signals risk. (Full breakdown in What Is Credit Utilization?)
What to do: Keep balances low relative to your limits. Many lenders and educators suggest staying under 30%, and lower is generally better.
3. Length of credit history (about 15%)
Scores consider the age of your oldest account, your newest account, and the average age of all accounts. Longer histories generally help.
What to do: Keep your oldest accounts open when it makes sense, and avoid opening many new accounts at once. (More in What Is Credit Age?)
4. New credit (about 10%)
Every time you apply for credit, the lender usually does a hard inquiry, which can cause a small, temporary dip. Several applications in a short period can look like financial stress. (See Hard vs. Soft Inquiries.)
What to do: Apply only when you need the account, and space applications out.
5. Credit mix (about 10%)
Scores like to see that you can handle different types of credit, such as revolving accounts (credit cards) and installment loans (auto loans, student loans, personal loans).
What to do: Don’t take on debt you don’t need just to improve your mix. This is the smallest lever and never worth borrowing for.
What is not in your credit score
Credit scores do not include your income, savings, checking account balance, age, race, gender, marital status, or where you live. Checking your own score does not affect it either. (We cover that in Does Checking Your Credit Score Lower It?)
What this means if you have bad credit or no credit
| Your situation | Focus first on |
|---|---|
| No credit history | Getting one account reported to the bureaus (secured card or credit builder loan), then paying on time |
| Late payments or collections | Bringing accounts current and preventing new delinquencies |
| High balances | Lowering utilization; this can move a score quickly |
| Too many recent applications | Pausing new applications while inquiries age |
Not sure where your score stands? Start with our guide to score ranges.
A simple 4-step starting plan
- Get your credit reports from all three bureaus so you know what lenders see.
- Check for errors and dispute anything that isn’t yours.
- Set up autopay on every account so nothing goes late.
- Lower balances on revolving accounts, or, if you have no accounts, open one designed for credit building.
Frequently asked questions
Is a credit score the same as a credit report? No. The report is the record of your accounts and payment history. The score is a number calculated from that record.
Can I have a credit score with no credit cards? Yes, if you have other reported accounts such as a loan. Without any reported account, you generally won’t have a score.
How fast can a score change? Utilization can move a score within one or two billing cycles. Negative marks such as late payments take much longer to fade.
This article is for general education and is not financial advice. Score formulas and lender practices change; confirm details with your lender or the scoring company.