What is credit utilization and how does it affect my score?
Credit utilization is how much of your available revolving credit you're using — your balances divided by your credit limits. It's one of the biggest factors in your score, usually second only to payment history. Lower is better: many lenders look for under 30%, and under 10% is ideal. High utilization can drop your score fast, but it's also one of the quickest things to fix.
What credit utilization means
Credit utilization is the share of your available revolving credit that you're currently using. You calculate it by dividing your balances by your credit limits. If you have a $10,000 total limit across your cards and you're carrying $2,000, your utilization is 20%. It applies to revolving accounts like credit cards, not installment loans like a mortgage or auto loan.
Why it matters so much
Utilization is one of the largest factors in your credit score — generally second only to payment history. To a scoring model, high utilization suggests you may be stretched thin and relying heavily on credit, which reads as higher risk. Low utilization suggests you have room to spare.
The ratios to aim for
Lower is better, with a few common benchmarks:
- Under 30% — the widely cited threshold most lenders like to see.
- Under 10% — ideal, and where the highest scores tend to sit.
- 0% on every card — slightly counterproductive; showing a small balance you pay off can score better than total inactivity.
Both your per-card utilization and your overall utilization across all cards matter, so a single maxed-out card can hurt even if your total is low.
Why it can move your score fast
Unlike payment history, which builds slowly, utilization updates every time your balances are reported — usually monthly. That cuts both ways: running up a card can drop your score quickly, but paying it down can lift your score just as fast, often within a cycle or two. It's one of the most responsive levers you have.
A reporting wrinkle worth checking
Your score uses the balance the card issuer reports, which is often your statement balance — not necessarily what you owe today. So even if you pay in full every month, a high statement balance can still show as high utilization. Paying down before the statement closes, or checking that your limits are reported correctly, can help. If a card is reporting the wrong limit or a balance you've already paid, that's a reporting error CreditRefresh can flag and dispute.