How Credit Utilisation Is Calculated

The math behind credit utilisation is straightforward. Add up the current balances on all your revolving credit accounts, then divide that total by your combined credit limits. Multiply by 100 to get a percentage.

Example: You have two credit cards. Card A has a $2,000 limit and a $500 balance. Card B has a $3,000 limit and a $700 balance. Your total balance is $1,200 and your total limit is $5,000. Your overall utilisation is 24%.

Scoring models look at this combined ratio and the ratio on each individual card. A high balance on just one card can still pull your score down, even if your overall utilisation looks fine. That's worth knowing if you tend to concentrate spending on a single card.

For a broader look at where utilisation fits among all the things that shape your score, see the five factors that shape your credit score.

~30%

Share of FICO score tied to amounts owed

According to FICO's published scoring breakdown, amounts owed - which includes credit utilisation - is the second-largest factor in a FICO score.

<30%

Commonly recommended utilisation ceiling

Most credit guidance suggests keeping utilisation below 30%, though scoring models generally reward lower ratios across the board.

1-2

Billing cycles for a balance paydown to show up

Because utilisation is recalculated when issuers report balances monthly, improvements can appear relatively quickly compared to other credit factors.

Why It Has Such a Big Impact

Credit utilisation carries significant weight in widely used scoring models. According to FICO, amounts owed - which includes utilisation - account for approximately 30% of a FICO score. Only payment history weighs more heavily.

The reason lenders pay attention is intuitive: someone using nearly all of their available credit may be financially stretched. Even if they've never missed a payment, consistently high utilisation signals a degree of reliance on borrowed money that can make lenders cautious.

The good news is that utilisation is one of the most responsive parts of your credit profile. Unlike account age, which takes years to build, utilisation can shift noticeably within a single billing cycle when you pay down a balance. That makes it one of the fastest levers you can pull if you want to move your score in the right direction.

Learn more about how specific card behaviors feed into this in our guide on how your credit card activity shapes your credit score.

Practical Ways to Lower Your Utilisation

There are a few approaches, and they don't all require paying off large amounts immediately.

  • Pay down existing balances. The most direct route. Even a partial paydown before your statement closing date reduces the balance your issuer reports to the credit bureaus.
  • Make multiple payments per month. If cash flow allows, paying your balance mid-cycle - before the statement closes - keeps the reported balance lower than your actual spending might suggest.
  • Request a credit limit increase. If your issuer raises your limit and your balance stays the same, your utilisation ratio drops automatically. This works, but only if you resist the urge to spend up to the new limit.
  • Spread spending across cards. If you use multiple cards, distributing purchases can prevent any single card from reaching a high individual utilisation rate.

Time Your Payments Strategically

Your credit card issuer typically reports your balance to the bureaus on your statement closing date, not your payment due date. If you want a lower utilisation to show up on your credit report, aim to pay down your balance before the statement closes - not just before the payment deadline. Check your card's statement cycle in your online account or app.

For more on the habits that support a strong score over the long run, see steady habits that support a healthy credit score over time.

Common Misconceptions to Clear Up

A few misunderstandings about credit utilisation come up repeatedly among people new to credit.

Myth: Carrying a small balance helps your score. This is one of the most persistent myths in personal finance. You do not need to carry a balance from month to month to benefit from low utilisation. Paying your balance in full - before the statement closes - and having a low reported balance is entirely sufficient.

Myth: Utilisation affects all types of debt. It doesn't. Installment loans such as auto loans, mortgages, and student loans are not part of the utilisation calculation. The ratio applies only to revolving accounts, primarily credit cards and personal lines of credit.

Myth: Closing unused cards improves your score. Closing a card removes its credit limit from your available credit, which can actually raise your utilisation ratio and lower your score. Unless there's a compelling reason to close an account, keeping it open and occasionally using it lightly is often the better move for your score.

Understanding how debt more broadly connects to your credit profile can help you make more confident decisions - see how debt affects your credit score for a fuller picture.

This article is for general informational and educational purposes only. It is not personalized financial or credit advice. Consider speaking with a licensed financial professional about your specific situation before making decisions about your credit or debt.