Credit Utilization: The Number Most People Get Wrong
It accounts for 30% of your FICO score — second only to payment history. Yet most people have no idea what it is or how fast it can wreck their score.
What is credit utilization?
Credit utilization is the percentage of your available revolving credit that you're currently using. If you have one credit card with a $1,000 limit and you carry a $300 balance, your utilization is 30%.
The formula
Current Balance ÷ Credit Limit = Utilization %
Example: $300 ÷ $1,000 = 30%
The 30% rule — and why it's actually too high
You've probably heard "keep utilization below 30%." That's decent advice, but research on people with 800+ scores shows they typically stay below 10%. Here's how each range affects you:
Total vs. per-card utilization
FICO looks at both your total utilization across all cards AND each individual card's utilization. A single maxed-out card can hurt your score even if your overall utilization looks fine. This is why spreading a balance across multiple cards is generally smarter than maxing one card.
Utilization resets every month
Unlike a missed payment, which can haunt your report for 7 years, utilization has no memory. Pay your balances down this month and next month's score can jump significantly. This makes it the fastest lever you can pull if you need to improve your score quickly before a major loan application.
💡 Pro tip: Pay your balance before the statement closing date, not just the due date. Lenders typically report your balance on the closing date — so even if you pay in full every month, a high closing balance looks like high utilization.
How to lower utilization without paying more
- →Request a credit limit increase — same balance, higher limit, lower utilization instantly
- →Open a new card — adds available credit, but only do this if you won't carry a balance
- →Pay twice per month instead of once — keeps average balance lower throughout the month
- →Use your cards, then pay off before the statement closes
Common mistakes
The most common mistake is paying the minimum balance and assuming you're doing well because you haven't missed a payment. You might have a perfect payment history and still have a 620 score because you're carrying a $4,800 balance on a $5,000 card — 96% utilization.
Another mistake: closing old credit cards. When you close a card, that available limit disappears, which can spike your utilization overnight.
See it in action
In Score Story, you'll face a scenario at age 26 where a retail card tempts you to carry a balance. See exactly how it hits your score.
Play Score Story — Free →