Credit score

A credit score is a three-digit number, on a scale that most often runs from 300 to 850, computed from the history in your credit report to predict how likely you are to repay what you borrow, and lenders use it to decide whether to approve you and at what rate.

by Lee Schmidt

Published September 22, 2026

A credit score is not kept anywhere. It is computed on the day someone asks for it, from whatever your credit report says at that moment, so it moves whenever the report does, and it differs between the two common scoring models, FICO and VantageScore, and between the three nationwide bureaus whose reports they read. Two things weigh most in every model: whether you have paid on time, and how much of your available card credit you are using, and the second can change within a month. The score predicts repayment; it does not grade your finances, and a household with no debt and a large income can have a thin file and a middling score.

In a sentence

"Her credit score is 742, and the mortgage rate she was quoted came from that number and the lender's own cutoffs."
"Paying the cards before the statements closed is what moved his credit score, because the balance the bureaus saw fell from 30% of his limits to 10%."
"A credit score is not the credit report. The report is the record; the score is a number computed from it on the day it is requested."

How it works

Lenders report each account to the credit bureaus about once a month: the balance, the limit or original amount, and whether the payment arrived on time. When a lender wants a score, a bureau's report is run through a scoring model, which weighs five families of facts and produces the number on the spot. Not every lender reports to all three bureaus and each model weighs the facts differently, so you have several scores at any moment, and they move together.

Factor family	What the report records	How it moves the score
Payment history	Whether each account was paid on time; payments reported 30 or more days late, collections, bankruptcies	Weighs most. One late payment lowers it; years of on-time payments hold it up
Amounts owed	Card balances against their limits, the credit utilization, and how much of each loan is still owed	Weighs second. High utilization lowers it, and it recovers as soon as lower balances are reported
Length of history	The age of the oldest account, the newest, and the average	Older is better. A new account lowers the average
New credit	Recent applications, the hard inquiries, and newly opened accounts	Several in a short stretch lower it a little for a while
Credit mix	Whether there are both revolving accounts, the cards, and installment loans	A small factor; having both helps a little

The common scales run from 300 to 850, and higher is better on every one of them.

An example

One household's report, and where each line lands.

What the report shows	Factor	Effect on the score
Every payment on time for six years across four accounts	Payment history	The strongest support the score has
$1,800 owed on cards with $6,000 of combined limits, 30% utilization	Amounts owed	Holding the score down; under 30% is the guideline
Oldest account nine years old, average age five years	Length of history	Helping, and improving every month
Two card applications in the last month	New credit	A small drag that fades over the following months
Cards plus a car loan	Credit mix	A small help

The line that can change fastest is the second. If the household pays the balances down from $1,800 to $600 before the statements close, the bureaus see 10% utilization the following month, and the score responds to that faster than to anything else on the list. The two applications fade on their own. One payment reported 30 days late would undo more than any other single event.

Why it matters

The score sets the price of borrowing, and the price is paid for years. A mortgage or a car loan is priced from a rate table where a higher score gets a lower rate, so the same loan costs less every month for its whole term; a card's APR and limit, an apartment application and a utility deposit can turn on the same number. Knowing the score prevents the slow mistake: a balance carried at 40% of the limits, a payment that slipped past 30 days, or four applications in the month before a mortgage. Utilization can be lowered in a month and a late payment cannot be undone, which is why the score is worth knowing before a large application rather than after.

Credit score versus credit report

The credit report is the record and the credit score is a number computed from it. The report lists every account a lender has reported, with its limit or original amount, its balance and its payment history month by month, plus applications, collections and public records; no score is printed on it. A mistake on the report, such as a payment marked late that was paid on time, changes every score computed from it afterward, which is why the report is the thing to read. See What happens when you pay a bill late for the point at which a late payment reaches it.

Common questions

Is a credit score the same as a credit report? No. The report is the record of your accounts and payments, compiled by each of the three nationwide bureaus from what lenders send them; the score is a number a model computes from that record when it is requested. Two models read the same report into two different numbers.

What is a good credit score? The cutoffs differ by model and by lender, so there is no single line. On the 300 to 850 scales, the 700s are generally treated as good and the upper 700s and above as the tier that gets the best pricing; below the mid-600s, approvals get harder and rates higher. Within any band, the direction the score is moving matters more than the exact number.

Does checking my own credit score lower it? No. Looking at your own score or report is a soft inquiry, which no model counts. A hard inquiry, the check a lender runs when you apply, can lower the score slightly for a while, and several in a short stretch lower it more, though the models generally treat mortgage or car loan inquiries within a short window as one search.

Does carrying a balance help my credit score? No. The bureaus see the statement balance whether or not it is paid in full afterward, so a card that is used and paid in full every month reports a balance and builds payment history without costing interest. Carrying a balance adds nothing to the score and adds interest to the cost.

Go deeper

What happens when you pay a bill late sets out the thresholds, the grace period, the late fee, and the thirty-day line at which a payment is generally reported.
How to budget with a credit card without overspending is the routine that keeps the statement paid in full, which is most of what the two heaviest factors ask for.
The Credit card payoff calculator shows how long a credit card balance takes to clear at the payment you make now, what the interest costs, and what to pay each month to be done by a date you choose.