Your credit score is a three-digit number that follows you everywhere — your landlord checks it, your car dealer checks it, your mortgage lender lives by it. And yet most people couldn’t tell you how it’s calculated beyond a vague sense that “paying bills late is bad.”
Let’s change that. Once you understand what moves your score, you have real control over it.
What Is a Credit Score, Exactly?
A credit score is a numerical summary of your credit history, designed to predict how likely you are to repay a loan. The most widely used scoring model is the FICO Score, which ranges from 300 to 850.
| Score Range | Rating |
|---|---|
| 800–850 | Exceptional |
| 740–799 | Very Good |
| 670–739 | Good |
| 580–669 | Fair |
| 300–579 | Poor |
Lenders use this number to decide whether to approve you for credit — and at what interest rate. A 50-point difference in your score can mean hundreds of dollars more (or less) in interest over the life of a loan.
The 5 Factors (and How Much Each Matters)
FICO scores are calculated using five factors, each weighted differently. Here they are in order of importance.
1. Payment History — 35%
The biggest factor by far. Every on-time payment builds your score. Every late payment hurts it.
“Late” means 30+ days past due, not just a few days. One 30-day late payment can drop your score by 60–100 points if your credit is otherwise good. The better your score, the more damage a single late payment does.
How to protect it:
– Set up autopay for at least the minimum payment on every account
– If you miss a payment, get current as quickly as possible — the damage lessens as time passes
– Negative payment history stays on your report for 7 years, but its impact fades significantly after 2–3 years if you stay current
2. Amounts Owed (Credit Utilization) — 30%
This measures how much of your available credit you’re using. It’s usually expressed as a percentage called your credit utilization ratio.
Example: If you have two credit cards with combined limits of $10,000 and you’re carrying $3,000 in balances, your utilization is 30%.
Most credit experts recommend keeping utilization below 30% — and below 10% if you want the best scores.
Important: This is calculated both across all your accounts (overall utilization) and for each individual card. Maxing out one card hurts your score even if your overall utilization is low.
How to improve it:
– Pay down balances
– Ask for a credit limit increase (without spending more)
– Don’t close old cards with low or no balances — they help keep your overall limit high
– If you carry balances, pay them before the statement closing date, not just the due date (the balance on your statement is what gets reported)
3. Length of Credit History — 15%
Longer credit histories generally mean higher scores. This factor considers:
– How long your oldest account has been open
– How long your newest account has been open
– The average age of all your accounts
This is why financial experts often advise people to keep their oldest credit card open — even if they rarely use it. Closing it shortens your average account age.
What this means for beginners: If you’re new to credit, time is your ally. Open accounts responsibly and let them age. There’s no shortcut here.
4. New Credit (Hard Inquiries) — 10%
Every time you apply for new credit — a credit card, a car loan, a mortgage — the lender does a hard inquiry on your credit report. Each hard inquiry can knock a few points off your score temporarily.
The impact is small and usually fades within 3–6 months. The account itself (if opened) can also lower your average account age.
What doesn’t count:
– Checking your own credit score (a “soft inquiry”)
– Pre-approval checks by lenders
– Background checks by employers or landlords
Strategy tip: If you’re rate-shopping for a mortgage or car loan, multiple hard inquiries for the same type of loan within a short window (typically 14–45 days) are usually counted as a single inquiry by FICO.
5. Credit Mix — 10%
Having different types of credit — credit cards (revolving credit) and installment loans like car loans or student loans (fixed monthly payments) — shows lenders you can manage multiple kinds of debt responsibly.
This is the least impactful factor and the one you should worry about least. Don’t take out a loan just to improve your credit mix. If you have cards and a car loan, you’re likely fine.
How to Check Your Score (For Free)
You’re entitled to a free credit report from all three major bureaus — Equifax, Experian, and TransUnion — every year at AnnualCreditReport.com. This is the only federally mandated free report site.
For your actual score (not just the report), many credit cards and banks now provide free FICO or VantageScore monitoring through their apps. Credit Karma provides free scores from two bureaus.
Check your report annually for errors — disputed errors that are corrected can improve your score meaningfully.
If Your Score Is Lower Than You’d Like
Building or rebuilding credit takes time, but it’s very doable:
- Secured credit card: You deposit cash as collateral and use it like a regular card. Responsible use builds history.
- Become an authorized user: A family member with good credit can add you to their card. Their history helps yours.
- Credit-builder loan: Offered by credit unions and some banks — you pay the loan, then receive the funds at the end. Builds history without needing existing credit.
Most people can see meaningful improvement within 6–12 months of consistent on-time payments and reduced utilization.
The Bottom Line
Your credit score is not a judgment of your worth as a person. It’s a metric — one you can understand, influence, and improve. Focus on the two biggest factors (payment history and utilization), and the other three tend to follow.
Check your report for errors once a year. Pay on time. Keep balances low. That’s most of what you need to know.
Explore FFoA’s Financial Literacy Courses for free, in-depth lessons on building credit and managing your finances — no account required.