Credit utilization

How much of your available credit card limit you're using, as a percentage.

Credit utilization is your card balances divided by your card limits. If you owe $1,500 across cards with $5,000 in total limits, your utilization is 30%.

It's one of the biggest parts of your credit score. A common guideline is to stay under 30%, and lower is better. Paying a card down before the statement closes can lower the balance that gets reported.