Your credit utilization ratio is the share of your available revolving credit that you are using. Revolving credit includes credit cards and lines of credit. If you have a $5,000 limit and a $1,500 balance, your utilization on that card is 30 percent. If you have several cards, scoring models look at both each card’s ratio and your total ratio. This number matters because it is one of the strongest factors in credit scores. It can affect whether you get approved for a mortgage, car loan, or apartment. A low ratio tells lenders you are managing borrowed money carefully.

Many people think utilization only changes when they pay their bill. Credit card companies usually report your balance once a month, often on your statement closing date. That reported balance is what appears in your credit file. If you pay by the due date but charge a lot before the statement closes, the bureaus may still see a high balance. To manage this, make a payment before the statement closing date. Paying enough to bring the reported balance below 30 percent, or even below 10 percent, can help.

The common advice is to keep utilization under 30 percent. That is a reasonable starting point, but lower is usually better. People with the best scores often have utilization in the single digits. That does not mean you must never use your cards. It means avoid letting large balances sit there when the statement closes. If you carry a balance from month to month, paying it down is the most direct fix. It also gives you more room if an emergency expense comes up.

Closing a credit card can backfire. When you close a card, you lose that available credit. If you still have balances on other cards, your total utilization can jump. For example, if you have $10,000 in limits and $3,000 in balances, your utilization is 30 percent. Close a $4,000 card with no balance, and your limits drop to $6,000. The same $3,000 balance is now 50 percent. That is why many experts suggest keeping old cards open. If the card has no annual fee, a small recurring charge paid automatically can keep it active.

Asking for a higher credit limit is another option. If your income supports it, a higher limit lowers your utilization without paying down debt. But this only works if you do not increase your spending. A higher limit with a higher balance does not help. The issuer may check your credit, which can cause a small temporary dip. That is usually not a big deal, but timing matters before a major loan. Do not open several new cards just to raise your total limits. New accounts can lower the average age of your credit history and add inquiries. That temporary dip is not worth it if you are shopping for a mortgage soon.

If you have several cards, pay attention to each card’s ratio. A single maxed-out card can hurt your score even if your overall utilization looks fine. Suppose you have three cards with $5,000 limits each. One has a $4,500 balance, while the other two have zero. Your overall utilization is 30 percent, which sounds acceptable, but that one card is at 90 percent. Paying down the highest-utilization card first can improve your score faster than spreading small payments across all cards. You can move some of that balance to a card with a low rate, but only if there is no expensive transfer fee and you have a plan to pay it off. Moving debt around without reducing it does not solve the problem.

Utilization has no memory in the same way late payments do. A high ratio from last month does not stay on your credit report forever. Once the issuer reports a lower balance, your score can improve quickly. That is good news if you are trying to clean up your credit before a big application. Start by checking your statement closing dates. Then make payments before those dates, not just before the due date. Keep old accounts open when it makes sense. Ask for limit increases if you can handle them responsibly. Focus on paying down the cards closest to their limits. Small, consistent changes to your reported balances can make a noticeable difference.