A credit card bill can tell you what you owe. Credit utilization asks a different question: how much of your available credit are you using? The answer is a percentage, built from your balances and credit limits. It can change even when you have not made a new purchase.
How is credit utilization calculated?
Credit utilization, also called the credit utilization ratio, is your revolving credit balance divided by your available revolving credit. Revolving credit lets you borrow repeatedly up to a limit, as a credit card does. To find an overall ratio, add the balances on your cards, add their credit limits, then divide the balance total by the limit total. Multiply by 100 to express the result as a percentage. The Consumer Financial Protection Bureau (CFPB) describes the ratio as the credit you are using compared with the credit you have available.
Suppose two cards have combined balances of $600 and combined limits of $3,000. Divide $600 by $3,000 and you get 0.20, or 20 percent utilization. One card could account for most of that balance while the other is nearly empty. The overall calculation combines them; it does not tell you how a particular scoring model weighs each card’s ratio.
Both sides of the fraction matter. If the combined balance falls to $300 while the limits stay at $3,000, utilization falls to 10 percent. If the balance stays at $600 but the available limit falls to $2,000, utilization rises to 30 percent. In the second example, the amount owed did not change.
Why do credit scores look at it?
Scoring models use the share of a credit limit in use as one sign of how a borrower is managing credit. The CFPB says part of a credit score is based on utilization. It is one input, not a score by itself. Payment history and other information also matter.
FICO says its “amounts owed” category makes up 30 percent of a FICO Score. That category covers more than utilization alone. FICO also says a high share of available credit in use can suggest that someone is overextended. The 30 percent category weight describes FICO’s published model information; it is not a weight to apply to every credit score.
What about a target percentage? The CFPB notes that many experts suggest staying below 30 percent of total limits and that people with the highest scores often use less than 10 percent. Those figures are general reference points, not cutoffs that promise a score change. Nor does a card need a balance to count as healthy activity: myFICO says a zero balance is not penalized simply for showing no current revolving activity.
Why might your reported balance surprise you?
Picture someone who pays every card bill in full. Could their credit report still show a balance? Yes. According to FICO, the balance from the last statement generally appears on the credit report. A payment made after that statement closes may leave the earlier balance visible in the reported information.
That is why the ratio on a report may not match a calculation using today’s account balances. The materials cited here do not establish when any particular issuer sends an update to a credit bureau. To understand what information is actually on file, readers can review their credit reports and compare the listed balances and limits with their account records. The FDIC’s credit report guide provides background on reading those reports.
What happens to the ratio when a card closes?
Closing a card can remove its available limit from the overall calculation. Return to the $600 balance and $3,000 limit example. If a card with a $1,000 limit and no balance closes, the combined balance is still $600, but the available limit falls to $2,000. The ratio rises from 20 percent to 30 percent without another purchase.
The CFPB cautions against assuming that closing a card will improve a credit score. A higher utilization ratio can lower a score, although the effect may be minor or temporary depending on the rest of the credit profile. The cited guidance does not give a set duration for the effect of a closure.
Utilization is not the only consideration. The CFPB notes that fees, unfavorable terms, or a desire to avoid debt that cannot be paid off can also matter when someone is deciding what to do with an account. Keeping an unused account open calls for attention, too: its statements may reveal unexpected fees or charges that could indicate fraud.
What should you check before changing an account?
Start with the numbers. What are your total balances and limits, and what is the ratio when you divide one by the other? Then ask how much of the total limit comes from the account you are considering closing. A card with no balance can still account for a large share of available credit.
Next, look beyond the fraction. Does the account have an annual fee or terms that matter to you? Are you planning to apply for credit soon, when a lender might review your file? These questions cannot predict a particular score. They can help separate the arithmetic of utilization from the other reasons an account decision may matter. For guidance on your own circumstances, check official sources or speak with a qualified professional.
Please seek a professional. This article is general information, not financial, tax or insurance advice. Please seek a licensed financial, tax or insurance professional about your own situation.
