Credit Scores: How They Work and What Moves Them

A credit score is a three-digit number — not a measure of your wealth or income, but a snapshot of how you've managed borrowed money over time. Lenders, landlords, and some employers use it to gauge financial reliability before extending credit, signing a lease, or making a hiring decision.

Where credit scores come from

Three major credit bureaus — Equifax, Experian, and TransUnion — maintain your credit report. Scoring models, most commonly FICO and VantageScore, read that data and produce a number. Because each bureau holds slightly different information, your score can vary a few points from one to another. Scores update as lenders report new activity, which typically happens monthly.

What the ranges actually mean

• 300–579: Very limited options; most lenders consider this high risk
• 580–669: Fair; some lenders will work with you, often at higher rates
• 670–739: Good; qualifies for most standard products
• 740–799: Very good; access to better rates and terms
• 800–850: Exceptional; lenders compete for your business

Payment history — roughly 35% of your score

The single biggest factor. Paying on time, every time, matters more than anything else in the model. Late payments stay on your credit report for up to seven years, and even one missed payment can drop a strong score by 50 to 100 points. Consistent on-time payment is the most reliable way to build or rebuild.

How much of your credit limit you're using — roughly 30%

This is called credit utilization — the share of your available credit limit that you're actually using. It's calculated across all your cards combined and for each card individually. Staying below 30% is the standard guidance; below 10% is even better for scores in the higher ranges. Paying down balances or asking for a credit limit increase both help bring this number down.

Length of credit history — roughly 15%

Scoring models look at how long your oldest account has been open, how new your newest account is, and the average age of everything in between. Keeping older accounts open — even if you rarely use them — supports this factor. Closing a card you've had for years can shorten your history and hurt your score even if you have no balance on it.

Time is one of the few things you can't shortcut.

Credit mix — roughly 10%

Lenders like to see that you've handled more than one kind of account responsibly — credit cards, installment loans, a mortgage. You don't need every type. But having only one kind of account gives lenders a narrower picture of how you manage credit.

New credit inquiries — roughly 10%

When you apply for new credit, lenders pull your report — called a hard inquiry — which can temporarily lower your score by a few points. Hard inquiries typically drop off after two years, and the score impact fades faster than that. The exception: multiple applications for the same type of loan (like a mortgage or auto loan) within a short window often count as a single inquiry, so shopping around for the best rate doesn't cost you as much as applying for multiple credit cards at once. Checking your own score is a soft inquiry — it has no effect on your score whatsoever.

Habits that help consistently

• Pay every bill before or on the due date — autopay removes the guesswork
• Keep card balances low relative to your limits
• Don't close old accounts you're not actively using
• Let your credit history grow — time is one of the few things you can't shortcut

Tools built for the credit-building stage

If you're starting from scratch or rebuilding after a rough stretch, a few products are specifically designed for this:

• Secured credit cards: You deposit money as collateral, use the card like a regular card, and build a payment record over time
• Credit builder loans: The lender holds the funds while you make payments, then releases the money at the end — the payment record is the point
• Becoming an authorized user on someone else's account with a strong history can add positive history to your own report
• Free score trackers like Credit Karma let you watch your score, see what's driving it up or down, and catch changes as they happen

What moves your score down

• Missing a payment — even by a few days — is the fastest way to hurt a strong score
• Maxing out a credit card spikes your utilization and signals risk to lenders
• Closing a card you've had for years shortens your history and reduces your total available credit
• Applying for several new accounts in a short stretch generates multiple hard inquiries at once
• Letting a bill go to collections creates a serious negative mark that can stay on your report for seven years

Checking your own score — anywhere — is always a soft inquiry and never affects the number. Here are the most common free options:

• AnnualCreditReport.com gives you free access to your full credit report from all three bureaus — the underlying data that scores are built from
• Credit Karma provides free ongoing access to your TransUnion and Equifax scores and flags changes in real time, so you know when something on your report shifts
• Many banks and credit card issuers now show your score inside the app at no cost — worth checking if you already have an account somewhere

Reviewing your credit report regularly also matters for a practical reason: errors on your report affect your score. Disputing a mistake — an account that isn't yours, a late payment reported incorrectly — is one of the few ways to improve your score without changing your behavior.