Credit utilization measures how much of your available revolving credit is currently in use — and it’s one of the most influential factors in most credit scoring models, separate from whether balances get paid off in full each month.
How it works
Add up balances across all credit cards and lines of credit, then divide by the combined limits across those same accounts. Installment loans like a mortgage or auto loan are scored differently and don’t factor into this ratio.
Why it matters even if you pay in full every month
Utilization is typically calculated from whatever balance is reported to credit bureaus on a given statement date — which can be well above zero even for someone who pays the full balance every month before interest ever accrues.
How to use this calculator
- Add up your balances across all revolving credit accounts.
- Add up the credit limits across those same accounts.
Frequently asked questions
Does utilization include mortgages or auto loans?
No — only revolving credit like credit cards and lines of credit. Installment loans are a separate factor in credit scoring.
Will paying my card in full each month keep utilization at 0%?
Not necessarily — most issuers report the balance as of the statement closing date, which can be high even if it’s paid off before any interest is charged.
Is 0% utilization the best possible score outcome?
Not always — some scoring models slightly favor a small amount of reported activity over none at all, though staying low is still the generally reliable guidance.
