Credit utilisation is the share of your available revolving credit that you are actually using. If your cards add up to $10,000 of limits and your statements show $3,000 of balances, your utilisation is 30%. It is one of the few credit-score inputs you can change within a single billing cycle, which makes it the most practical lever most people have.
The formula, and why there are two versions
Utilisation = balance 梅 credit limit
There are two numbers that matter, and they can point in opposite directions.
| Card | Limit | Balance | Per-card utilisation |
|---|---|---|---|
| Card A | $2,000 | $1,600 | 80% |
| Card B | $8,000 | $400 | 5% |
| Total | $10,000 | $2,000 | 20% |
Overall utilisation here is a healthy 20%. Card A is nearly maxed. Because scoring models look at both the total and the individual cards, that one card can drag the score down even when the total looks fine.
Timing matters more than the balance
Issuers report your balance to the credit bureaus once a month, usually around the statement closing date. The number that gets reported is the balance on that date 鈥?not your balance today, and not what you pay off a week later.
This explains a common surprise: someone pays the card in full every month, yet their report shows high utilisation, because the statement closed before the payment landed. Paying before the statement date rather than the due date is the fix.
The “30% rule” is a guideline, not a rule
Many guides cite 30% as the threshold to stay under. Scoring models do not publish exact cut-offs, and the effect is gradual rather than a cliff at 29.9%. Treat the number as a direction of travel: lower is generally better, and the difference between 60% and 20% is material. Anyone quoting a precise scoring formula is guessing.
Five legitimate ways to lower it
- Pay before the statement closes. The reported balance falls, even if your spending does not change.
- Split a large purchase across two statements. One $1,200 charge on a $2,000 limit is 60%; spread over two months it may never exceed 30%.
- Ask for a limit increase. A higher denominator lowers the ratio without paying anything. This usually involves a credit check.
- Keep old cards open. Closing a card removes its limit from the total and can push utilisation up sharply, even if you never used it.
- Pay down before applying. If you are about to apply for a mortgage or a loan, get the reported balances down a month or two ahead, not the week before.
Mistakes that quietly raise it
Carrying a balance “to build credit”. Paying interest is not required to build a score, and it costs money every month. On-time payment history is what builds the record.
Maxing a rewards card for the points. If the balance is reported at 90% before you pay it, the score sees 90%.
Closing a card you no longer use. The limit disappears from the calculation; the history stays for years, but the ratio worsens immediately.
Where it fits in the score
Utilisation is one input among several 鈥?payment history, length of credit history, new credit and credit mix are the others. It is worth knowing which one is dragging before spending effort on the wrong lever. Our explainer on what a credit score is and what actually moves it covers the whole set.
If the balances are the problem rather than the reporting date, the payoff order matters too: debt avalanche vs snowball works through which debt to attack first.
Frequently asked questions
Does utilisation affect my score immediately?
It can change as soon as a new balance is reported, which is typically monthly. That is why it is often described as the fastest-moving factor 鈥?and why paying down before a statement can show up within weeks.
Should I keep utilisation at zero?
Zero reported usage on every card can be treated as no recent activity by some models. A small reported balance that you pay in full is usually enough to show active, responsible use. The exact treatment is not published.
Do charge cards count?
They can. Charge cards with no preset spending limit may still be included in utilisation calculations using an estimated limit, depending on the model.
Does closing a card hurt right away?
The ratio worsens immediately because the available limit drops. The account’s age and payment history stay on the report for years, so the long-term damage is smaller than the short-term utilisation jump.
Sources and further reading
Reference sources for the definitions and rules used on this page:
- Consumer Financial Protection Bureau 鈥?What is a credit utilization rate?
- Consumer Financial Protection Bureau 鈥?Credit reports and scores
- Investor.gov (SEC) 鈥?Credit score
Reviewed 29 October 2026. This article is educational and is not financial advice. See our disclaimer.
