How do credit scores actually work?
Your credit score affects whether you’re approved for a loan and what rate you’re offered — which can mean thousands of dollars over the life of a loan. The good news: the rules are knowable, and most of them reward a few simple habits.
Credit report vs. credit score
Your credit report
The record. Each of the three national credit bureaus — Equifax, Experian, and TransUnion — keeps a file of your accounts, balances, payment history, inquiries, and certain public records. The three files can differ slightly.
Your credit score
A number calculated from a report to estimate how likely you are to repay. The most common scores (FICO and VantageScore) run from 300 to 850; higher is better.
The score is only as accurate as the report it’s built from — so the report is the thing to check and fix first.
The five things that make up a FICO Score
FICO publishes how much each category matters for the general population. The exact weight varies from person to person, but the order is a reliable guide to what to focus on.
Payment history
35%
Whether you’ve paid on time. Late payments, collections, and bankruptcies weigh heavily. A payment is usually reported late once it’s 30 or more days past due.
Amounts owed
30%
How much you owe — especially how much of your available card credit you’re using (your utilization). High card balances can pull a score down even if you never miss a payment.
Length of credit history
15%
How long your accounts have been open, including the age of your oldest account and the average age of all of them.
New credit
10%
Recent applications (hard inquiries) and newly opened accounts. Opening several accounts in a short time can look risky.
Credit mix
10%
Having experience with different types of credit — revolving (cards) and installment (car, student, personal loans). It’s a minor factor; don’t open a loan just to improve it.
Payment history and amounts owed together make up about two-thirds of the score. That’s where your effort pays off most.
Credit utilization, explained
Utilization is the share of your card limits you’re using. It’s calculated across all your cards and for each card individually.
Example
Two cards with $5,000 limits each = $10,000 in available credit. Balances of $6,000 total = 60% utilization. Pay that down to $2,000 and utilization drops to 20%.
This is one reason a consolidation loan can help a score over time: moving card balances onto an installment loan lowers revolving utilization — as long as the cards stay paid down.
- Lower is better. “Stay under 30%” is a common rule of thumb, not a magic line — people with the highest scores tend to use far less.
- Timing matters. Issuers usually report the balance on your statement date. Paying before the statement closes means a lower balance gets reported.
- It recovers fast. In many scoring models, utilization reflects your most recent reported balances, so paying down cards can show up in your score within a month or two. Late payments, by contrast, linger for years.
What hurts — and for how long
| Item | How long it can stay on your report |
|---|---|
| Late payments, charge-offs, collections | Generally up to 7 years |
| Bankruptcy | Up to 10 years |
| Hard inquiries | About 2 years (FICO only counts the last 12 months) |
| High card balances | Only as long as the balances stay high |
Negative items hurt most when they’re recent. Their impact fades as they age, especially if everything since has been on time.
Medical debt: the three bureaus voluntarily stopped reporting paid medical collections and medical collections under $500. A federal rule that would have gone further was struck down in 2025, and some states have their own limits. Check your reports — this area is still changing.
What doesn’t affect your score
- Checking your own credit
- Pre-qualification (soft-pull) rate checks
- Your income or job title
- Debit card use and bank balances
- Race, religion, national origin, sex, or marital status
- Where you live
Common myths
“Checking my own credit hurts my score.”
No. Checking your own report or score is a soft inquiry and has no effect.
“Carrying a small balance on my card helps my score.”
No. Paying your statement in full shows the same on-time history without paying any interest. You don’t need to pay interest to build credit.
“Closing old cards will boost my score.”
Often the opposite. Closing a card removes its credit limit, which can raise your utilization, and over time can shorten your credit history.
“I have one credit score.”
You have many. There are different scoring companies (FICO, VantageScore), different versions, and three credit bureaus with slightly different data. A lender may see a different number than your app shows.
“My income affects my credit score.”
No. Income isn’t on your credit report. Lenders do look at income separately when deciding whether to approve you and at what rate.
“A company can remove accurate negative information for a fee.”
No one can legally remove accurate, timely information. You can dispute errors yourself, for free.
How to build or rebuild your score
- Never miss a payment. Set every account to autopay at least the minimum, then pay extra by hand. One 30-day late payment can outweigh months of progress.
- Pay down card balances. It’s the fastest lever you control. The avalanche vs. snowball calculator can help you choose an order.
- Keep old, no-fee accounts open. They add to your available credit and history length.
- Space out new applications. Apply only for credit you actually need.
- Fix errors. If something on your report is wrong, dispute it directly with the bureau that shows it (and the company that reported it). It’s free, and the bureau generally has to investigate within 30 days.
- Thin or damaged file? A secured credit card or a credit-builder loan from a bank or credit union can establish on-time history. Use it lightly and pay it in full.
Get your reports free — every week
You can get free credit reports from all three bureaus once a week at AnnualCreditReport.com — the only site authorized by federal law for this. Type the address yourself; lookalike sites may charge you or steal your information. Reports don’t always include a score, but many banks and card issuers show you one for free.
Ready to see how your score fits into a loan decision? Read how to find the right personal loan.
Sources
- myFICO: What’s in my FICO Scores? — the five categories and their weights.
- CFPB: How long does negative information remain on my credit report? — 7-year and 10-year limits.
- FTC: You now have permanent access to free weekly credit reports.
- CFPB: Credit reports and scores — disputing errors and understanding your report.
Educational only — current as of October 2026; not financial, legal, or credit-repair advice. Scoring models change; check with the lender which score they use.