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Credit utilization: what it is and how it affects your score
By the My AI Fin App team · Updated October 1, 2026 · 7 min read
Credit utilization is one of the biggest factors in your credit score, and unlike your payment history it can change quickly. Understanding how it is measured lets you improve it in a month or two.
What credit utilization is
Credit utilization is the share of your available revolving credit, mainly credit cards, that you are using. If your cards have a combined limit of $10,000 and you owe $2,500 across them, your utilization is 25%.
Scoring models look at it two ways: overall, across all your cards, and per card. A single maxed-out card can hurt even if your overall utilization is low.
Why it matters so much
Amounts owed are one of the largest components of common credit scoring models, second only to payment history, and utilization is the main measure within it. High utilization suggests you may be relying on credit to cover expenses, which lenders see as a risk.
The good news is that utilization has no long memory in most scoring models. It is generally based on the balances most recently reported, so once you pay balances down and the lower figures are reported, your score can recover quickly.
How to calculate yours
Add up the current balance on every credit card. Add up the credit limit on every card. Divide the balances by the limits and multiply by 100. Then do the same for each card on its own.
Example: Card A has a $1,800 balance on a $3,000 limit (60%). Card B has $200 on a $7,000 limit (about 3%). Overall: $2,000 of $10,000, or 20%. The overall figure looks fine, but Card A at 60% is worth paying down first.
What is a good utilization rate?
Lower is better. A commonly cited guideline is to keep it under 30%, and people with the highest scores often keep it under 10%. Zero is not necessarily best: having a small balance reported and then paid in full shows active, responsible use.
You do not need to carry a balance or pay interest to have a good utilization rate. Paying the statement in full each month keeps it low and costs nothing.
Paying in full is not always enough
Most card issuers report your balance to the credit bureaus once a month, usually around the statement closing date, not the payment due date. So even if you pay in full every month, a large balance on the statement date gets reported as high utilization.
If you are about to apply for a loan, pay your balance down before the statement closes. The lower balance is what gets reported.
Ways to lower your utilization
In rough order of impact:
- Pay down balances, starting with any card that is close to its limit.
- Pay before the statement closing date, or make several payments a month, so lower balances are reported.
- Ask your issuer for a credit limit increase. A higher limit with the same balance means lower utilization. Ask whether the request causes a hard credit inquiry first.
- Keep old cards open, even if you rarely use them. Closing a card removes its limit and can raise your utilization overnight.
- Spread a necessary large purchase across cards rather than maxing out one, if you will pay it off quickly.
What not to do
Do not open new cards just to raise your total limit if you are about to apply for a mortgage or car loan; new accounts and hard inquiries can lower your score temporarily. And a higher limit only helps if your spending stays the same. If more room means more spending, the utilization gain disappears and the debt grows.