Credit Utilization Calculator
Credit utilization is how much of your available credit you're using — and it's one of the biggest factors in your credit score. Add your cards below to see where you stand and exactly how much to pay down to hit the targets that matter.
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How utilization affects your credit score
Utilization = balance ÷ credit limit. If a card has a $1,000 limit and a $300 balance, you're using 30% of that card. Scoring models like FICO look at this ratio two ways: on each card individually, and across all your cards combined.
It matters because it signals risk. Someone using most of their available credit looks stretched thin; someone using a small slice looks in control. Utilization is the second-biggest category in the FICO score (about 30% of it, under "amounts owed") — only paying on time counts for more.
- Under 10% — excellent. This is where the highest scores tend to sit.
- 10–30% — okay, but improvable. Generally considered acceptable, though your score may still be leaving points on the table.
- Over 30% — likely hurting you. Lenders and scoring models start treating you as higher-risk, and the effect grows the higher it climbs. A maxed-out card is the worst case.
The good news: utilization has no memory in most scoring models. It's recalculated from your current balances each time your card issuer reports (usually once a month, around your statement date). Pay a balance down, and your score can recover within a billing cycle or two — no waiting years for it to "age off."
Frequently asked questions
What is credit utilization?
It's the percentage of your available credit that you're currently using. Take your balance, divide it by your credit limit, and multiply by 100. A $450 balance on a $1,500 limit is 30% utilization. Credit scoring models check it per card and overall across all your cards, so one maxed-out card can drag your score down even if the rest are empty.
Why does 30% matter?
Thirty percent is the long-standing rule of thumb: below it, you're generally seen as a responsible borrower; above it, your score starts taking noticeable hits, and the damage grows as the percentage climbs. It's not a hard cliff — 31% isn't catastrophic and 29% isn't magic — but it's a useful target. People with the very highest scores typically keep utilization under 10%, which is why this calculator shows you both targets.
Does paying down my balance actually raise my score?
Yes — and it's one of the fastest score improvements available. Because utilization is based on your current reported balances, paying a card down lowers your ratio as soon as the issuer reports the new balance to the credit bureaus, typically once a month. Many people see a change within 30–60 days. Two things to know: the gain depends on the rest of your credit profile, and the new score only sticks if the balance stays down — charging it back up brings the ratio (and the score dip) right back.
Should I pay down the card with the highest utilization or the highest interest?
For your score, pay down whichever card has the highest utilization percentage — that's what scoring models penalize most. For your wallet, the highest interest rate costs you the most money. If you can only pick one, lowering a card that's over 30% usually gives the quickest score lift, while the highest-APR card is the better long-term money move. Doing a bit of both is fine too.
Does closing an old card help my utilization?
Usually the opposite. Closing a card removes its credit limit from your total, so the same balances suddenly take up a bigger percentage of your remaining credit. Keeping an old card open — even with a zero balance — pads your total limit and lowers your overall utilization. (If it has an annual fee you don't want to pay, that's a separate calculation.)