What is credit utilization?

Credit utilization measures how much of the available revolving credit a borrower is using. It can be calculated for a single account, such as one credit card, or in aggregate across all of a consumer's revolving accounts. Utilization applies to revolving products like credit cards and lines of credit, not to installment loans.

Utilization is a significant factor in common credit scoring models, with lower ratios generally associated with lower risk. Lenders also track it within their own portfolios. Rising utilization, especially when combined with minimum payments, can signal financial stress before delinquency appears. Utilization feeds credit line management decisions and exposure at default estimates for revolving products.

Utilization is a snapshot that depends on when balances are reported. Borrowers who pay in full each month may show high reported utilization if statements close before payment. Line decreases by the lender raise utilization mechanically without any change in borrower behavior. Using aggregate figures alone can hide a single maxed-out account.