How Your Utilisation Ratio Is Calculated
The math is straightforward. Add up the balances on all your revolving credit accounts — typically credit cards and lines of credit — then divide that total by your combined credit limits. Multiply by 100 to get a percentage.
For example: $2,500 in total balances divided by $10,000 in total limits equals a 25% utilisation ratio. Scoring models apply this calculation at two levels: across all your revolving accounts combined, and individually for each account. A card that is nearly maxed out can weigh against you even if your aggregate number looks fine.
Installment loans — such as auto loans or mortgages — are treated separately and generally do not factor into utilisation the same way. For more on this distinction, see how revolving credit and installment loans affect your score differently.
~30%
Weight of 'amounts owed' in FICO scoring
FICO, the most widely used credit scoring model in the US, attributes approximately 30% of a score to amounts owed — a category in which credit utilisation plays a central role.
<10%
Utilisation typical of highest scorers
Consumers with the highest credit scores — generally 800 and above — tend to maintain very low revolving credit utilisation, often under 10%, according to credit industry analysis.
Why Scoring Models Watch This Number Closely
Credit scoring models are designed to predict the likelihood that a borrower will repay debt as agreed. High utilisation can suggest that someone is financially stretched — relying heavily on borrowed money to cover day-to-day expenses. That signals greater repayment risk to lenders.
Utilisation is generally considered one of the most heavily weighted factors in widely used scoring models. While the exact weighting varies by model version, the category it belongs to — amounts owed — typically represents around 30% of a FICO score.
Importantly, utilisation is also one of the most responsive factors in your score. Because it reflects your current balances rather than your historical behaviour, paying down debt can produce measurable score movement relatively quickly. This is different from factors like credit age or payment history, which shift slowly over time.
“Amounts owed on credit accounts is too high — this is the most common reason people with credit history still score below where they expect. Carrying high balances relative to your limits signals risk, regardless of how reliably you pay.”
— MyFICO (FICO Consumer Education), Official consumer guidance from the creators of the FICO credit scoring model
Practical Ways to Keep Utilisation in Check
The clearest path to lower utilisation is reducing balances. Minimum payments keep accounts current but often barely reduce the principal — especially on high-interest cards. Allocating extra payments toward balances, even modestly, moves the utilisation needle more effectively.
Timing your payments can also matter. Because issuers generally report balances on your statement closing date, making a payment before that date — rather than on or after your due date — means a lower balance gets reported. This is particularly relevant if you are preparing to apply for new credit.
Pay Before Your Statement Closes
Your card issuer generally reports your balance to credit bureaus on your statement closing date — not your payment due date. Making a payment before the statement closes means a lower balance is reported, which can reduce your utilisation ratio for that billing cycle. This is worth considering if you are actively trying to improve your score.
Keeping older credit accounts open, even if rarely used, preserves your total available credit and generally supports a lower utilisation ratio. Closing old accounts can raise your utilisation by reducing your available credit, sometimes unexpectedly.
Beyond the score itself, healthy utilisation habits connect directly to your broader financial stability. Tracking spending and avoiding balances that outpace what you can comfortably repay is the foundation — see budgeting basics for practical strategies that support this goal.
If you are managing credit with a future auto loan in mind, note that lenders examine your full credit profile — including utilisation — when setting rates. What your credit score does to your car loan explains how scoring factors translate into real loan terms.
This article is for general informational and educational purposes only and does not constitute personalised financial or credit advice. Consult a qualified financial professional for guidance tailored to your individual situation.
Frequently Asked Questions
Most financial guidance suggests keeping your utilisation below 30% of your available credit. Those with the highest credit scores often maintain utilisation below 10%. Lower is generally better, though scoring models weigh many factors together.
Yes, but timing matters. Card issuers typically report your balance to credit bureaus on your statement closing date, not your payment due date. If you pay in full after the statement closes, the reported balance — and therefore your utilisation — may still be high. Paying before your statement closes keeps the reported balance low.
Closing a card reduces your total available credit, which can push your utilisation ratio higher if you carry balances elsewhere. This is one reason closing accounts you no longer use may not be as harmless as it seems.
Extremely low utilisation — essentially 0% — can sometimes result in slightly lower scores than maintaining a very small balance, depending on the scoring model. However, the difference is minor, and paying balances in full remains sound financial practice.
Because utilisation is based on your current reported balances, improvements can reflect in your credit score within one to two billing cycles after balances are paid down. Unlike some credit factors, utilisation has no long memory — past high utilisation doesn't linger once balances drop.
The content on this site is for informational purposes only and is not a substitute for professional advice. Always consult a qualified professional for guidance specific to your situation.