What Is Credit Utilization and How Is It Calculated?

Credit utilization is the share of your available revolving credit that you are using. If a card has a $10,000 limit and the balance reported to the credit bureaus is $2,000, utilization on that card is 20 percent. Lower is generally viewed as better, and because it reflects current balances rather than long history, it is one of the faster parts of a credit profile to change.

This guide shows how utilization is calculated, which balance gets counted, what the commonly cited ranges are and where they come from, and practical ways to lower it. It is US-centric general education, and scoring formulas are proprietary, so the numbers here are examples rather than guarantees.

How utilization is calculated

Utilization uses balances and limits on revolving accounts, mainly credit cards. The CFPB describes the credit utilization ratio as the amount you are using divided by your available credit. There are two common views:

• Per card. One card’s balance divided by that card’s limit.
• Overall. All card balances added up, divided by all limits added up.

A hypothetical example:

Which views a particular scoring model emphasizes is not fully public, so it is reasonable to keep both the overall figure and any single card from running high. Installment loans such as auto loans and mortgages are treated differently from revolving credit.

Which balance gets counted

Card issuers usually report your balance to the credit bureaus about once a month, often around the statement closing date. That reported figure is what gets used, not the balance after you pay.

So you can pay in full every month and still show high utilization. Suppose your limit is $5,000, you spend $3,500 during the cycle, the statement closes at $3,500, and you pay it off by the due date. The bureaus may have seen $3,500, which is 70 percent. You owe no interest, but the reported ratio was high.

A common approach is to pay part of the balance before the statement closes so the reported figure is smaller. The closing date and the due date are different, and the due date usually falls a few weeks later, so find both in your account.

Commonly cited ranges

FICO’s educational page names “amounts owed” as one of five factors in its scores, assigns it 30 percent of the score, and says that using a lot of your available credit may indicate you are overextended. It gives no numeric utilization cutoff, and neither does the CFPB’s guidance I reviewed.

The figure you will most often see, keeping utilization under about 30 percent, is a widely repeated rule of thumb in consumer credit education rather than a published threshold from a scoring company. Lower ratios are often described as better, and ratios near the limit as a larger negative, but the exact effect depends on the scoring model and the rest of your file. Treat any number as a direction.

A zero balance is not required for good scores, and there is no need to carry a balance or pay interest to show activity. Interest is a pure cost.

Why it moves a score

High utilization can read as a sign you are stretched. Because it is based on current reported balances, paying a balance down and having a lower amount reported can change the picture at the next reporting cycle, which makes it different from a late payment that stays on your reports for years. How quickly a score responds depends on the model and the lender’s data, so do not count on a specific timeline.

Other factors matter too, including payment history, which FICO lists first. A missed payment is generally far more damaging than a high balance. For the wider picture of account decisions, see when to keep or close an old credit card.

Ways to lower utilization

These do not require paying interest:

1. Pay down balances, starting with any card that is close to its limit.
2. Pay before the statement closes if you use the card heavily.
3. Make more than one payment a month, so balances stay low during the cycle.
4. Ask for a credit limit increase. The same balance against a larger limit is a lower ratio. Some issuers use a soft inquiry for this and others a hard one, so ask first.
5. Spread spending so no single card runs high.
6. Keep old cards open where they cost nothing, because closing one removes its limit from your total.

A worked example: your overall limit is $12,000 and the reported balance is $5,400, or 45 percent. A $2,000 payment before the statement closes brings the reported balance to $3,400, about 28 percent.

How closing a card affects the ratio

The CFPB states that closing an existing card could decrease your score rather than help it, and links the reason to the utilization ratio: closing a card takes its limit out of your total available credit. Suppose you have cards with limits of $6,000 and $4,000 and a $2,000 balance on the first. Utilization is $2,000 over $10,000, or 20 percent. Close the $4,000 card and it becomes $2,000 over $6,000, about 33 percent, with no change to what you owe. The CFPB also stresses that the full effect varies with the rest of your credit profile and may be temporary or minor. The decision process is in when to keep or close an old credit card, and how card count enters is in how many credit cards is too many.

Myths worth dropping

• “I need to carry a balance to build credit.” You do not. Using a card and paying in full builds history without interest.
• “If I pay in full, my utilization is zero.” Not necessarily, because the reported figure is usually the statement balance.
• “More cards always lower utilization.” Only if your spending does not rise to match the extra limit.
• “Checking my own credit lowers it.” Looking at your own report or score is generally a soft inquiry, which is not used the way a lender’s application inquiry is.

Trade-offs

• Paying down a card uses cash. Do not drain emergency savings to move a score by a few points.
• Repeated limit-increase requests with hard inquiries can cause small temporary dips.
• If you are not applying for credit soon, small changes in the ratio may matter little.
• If high balances come from debt you cannot clear, the balance is the problem. A payoff plan or a transfer may help, as covered in whether a balance transfer is worth it. A nonprofit credit counselor can review your situation.

If you plan to apply for a mortgage or auto loan, you may want to lower balances a month or two ahead, with the statement dates in mind. Review your credit reports for errors at least once a year through the official free options in the US.

To check your own utilization, use the credit utilization calculator.

Where this comes from

This guide draws on FICO’s educational page on the factors in its credit scores, the Consumer Financial Protection Bureau’s consumer answer on closing credit cards and utilization, and the CFPB’s general description of the utilization ratio. The 30 percent figure is described as a commonly repeated rule of thumb, not a published cutoff. The worked examples are hypothetical. Scoring models and reporting practices change, so confirm details with the bureaus and your issuer.