With 10+ cards, I used to think utilization was one number. Add up the balances, add up the limits, divide, done.
Turns out there are two numbers, and the one most people don't watch is the one that can bite.
What is credit utilization?
Credit utilization is how much of your available credit you're using. It's part of the "amounts owed" category, which FICO says makes up 30% of your score. That makes it one of the biggest things you can actually move month to month.
It only counts revolving credit, like credit cards and lines of credit. Car loans, student loans and mortgages are not part of it.
How overall utilization is calculated
Add up the balances on all your cards, add up all your credit limits, and divide.
Say you have three cards:
- Card A: $900 balance on a $1,000 limit
- Card B: $0 balance on a $5,000 limit
- Card C: $100 balance on a $4,000 limit
Total balances: $1,000. Total limits: $10,000.
Overall utilization: $1,000 / $10,000 = 10%. Looks great.
How per-card utilization is calculated
Same math, one card at a time.
- Card A: $900 / $1,000 = 90%
- Card B: $0 / $5,000 = 0%
- Card C: $100 / $4,000 = 2.5%
And there it is. Card A is nearly maxed out, even though the overall number looks perfect.
Do both actually matter?
Yes. Experian says both your overall ratio and the ratio on individual cards can affect your scores, so one card running close to its limit can drag things down even when your total is low.
This is easy to miss when you chase points. The card that earns the most on groceries or gas might also be the one with the smallest limit, and it quietly fills up while your overall number keeps looking fine.
What's a good utilization ratio?
There's no magic cutoff, but here's the general guidance:
- Under 30% is the common rule of thumb for your overall ratio.
- Under 10% is where a lot of people with excellent scores sit. Experian says the best rate is in the single digits.
- Exactly 0% across everything isn't necessarily better than a little bit. Experian notes that a little utilization is better than none at all.
And apply that thinking per card too. Try not to let any single card run near its limit.
When does your utilization actually get counted?
This is the sneaky part. Card issuers generally report your balance to the credit bureaus around the end of your billing cycle, which is usually your statement date, not your due date.
So even if you pay in full every month, a big balance on your statement date can show up as high utilization. The fix: pay some of it down a few days before the statement closes, and a lower balance gets reported. I wrote more about that in statement balance vs current balance.
The good news is that utilization mostly reflects your most recently reported balances, so a high month isn't a life sentence. Pay it down, and the next report tells a different story.
How to lower your utilization
- Pay before the statement date, especially on your lowest-limit cards.
- Spread spending across cards so no single card runs hot.
- Keep old no-fee cards open. Closing one removes its limit from the math. Here's how that plays out.
- Ask for a credit limit increase on cards you use a lot, if it won't trigger a hard inquiry.
- Watch the per-card number, not just the total.
The quick version
- Overall utilization = all balances / all limits.
- Per-card utilization = each card's balance / its limit. Both can affect your score.
- Aim for under 30% overall, single digits if you're chasing the best scores, and no card near its max.
- Your statement date is what counts, not your due date.
Doing this math across 10+ cards every month is exactly the kind of thing that sent me running from my spreadsheet. Cardinate's credit card utilization tracker shows your overall and per-card utilization on one screen, so the card quietly sitting at 90% doesn't get to hide.
Sources
Frequently asked questions
Is credit utilization calculated per card or overall?
Both. Overall utilization divides all your card balances by all your limits, and per-card utilization looks at each card on its own. Experian says both can affect your credit scores.
What is a good credit utilization ratio?
Under 30% overall is the common rule of thumb, and Experian says the best rates are in the single digits. Keeping any one card from running near its limit matters too.
When does credit card utilization get reported?
Card issuers generally report your balance to the credit bureaus around the end of each billing cycle, usually the statement date, so paying down before the statement closes can lower the reported utilization.
Do loans count toward credit utilization?
No. Utilization covers revolving credit such as credit cards and lines of credit. Installment loans like car, student and mortgage loans are not part of it.
Keep going
This post is for general information only and isn't financial, legal or tax advice. I'm not a financial advisor. Card terms, fees and rates change and vary by issuer, so check the details with your card issuer before making a decision.