Credit Utilization Calculator
Credit utilization, the percentage of your revolving credit you are using, is the second-biggest factor in a FICO score, behind only payment history. The scoring models look at both your per-card ratio and your overall ratio, and both matter. This calculator lets you enter each card’s balance and limit, see individual and aggregate utilization, and compute how much to pay down to hit a target ratio like 30%, 10% or zero.
How to calculate utilization
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1
Enter each card
Balance and credit limit for every open revolving account. Add as many rows as you need.
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2
See per-card and overall
Each card's ratio and your aggregate ratio (total balances / total limits). Both are scored.
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3
Pick a target
30% (safe), 10% (optimal), or a custom number. The calculator shows how much to pay down in total and which cards to hit first.
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4
Plan the payoff
See the exact dollar amount per card to reach target and the expected score impact range.
What utilization is
utilization = current balance / credit limit
Calculated per card and in aggregate. Reported to the credit bureaus monthly by most issuers on the statement date (not the due date). The ratio on the statement date is what gets reported, you can carry a balance through the month and still report 0% if you pay before the statement cuts.
Score impact tiers (FICO)
| Utilization | Score impact |
|---|---|
| 0% (on all but one card) | Optimal |
| 1-9% | Excellent |
| 10-29% | Good |
| 30-49% | Moderate drag (-20 to -40) |
| 50-74% | Significant drag (-40 to -70) |
| 75-99% | Heavy drag (-70 to -120) |
| 100%+ | Severe (-100+, plus risk of late fees) |
Per-card vs. aggregate
Both matter. A common failure mode: someone with three cards at $10,000 limit each carries $9,000 on one and zero on the others. Aggregate utilization is 30%, fine on paper, but per-card utilization on the maxed card is 90%, which drags the score significantly. The scoring models look at the worst card too.
The “all zeroes” trap
If every card reports 0% balance, FICO models actually prefer one card to show a small balance (1-9% utilization). Using and paying a single card keeps it “active” for scoring purposes. Do not intentionally carry interest, just time one card so the statement cuts with a small balance, then pay in full before the due date.
Quick ways to improve utilization
- Pay down before statement date, not just before due date.
- Request a credit-limit increase on a card you rarely max. A higher limit lowers utilization at the same balance.
- Spread balances across cards if one is near max.
- Do not close old cards, closing reduces total limit and usually raises utilization.
- Open a new card carefully, the hard pull costs a few points short-term but the added limit helps long-term utilization.
Before a big application
If you are about to apply for a mortgage, car loan or new card, aim for single-digit aggregate utilization for the statement period that will be pulled. That means paying down balances 2-3 weeks before the application so the reported number is already low.
Frequently Asked Questions
Under 10% if you want the best possible score, under 30% to avoid noticeable drag. Single-digit is the sweet spot. Zero on every card is fine but not optimal for FICO, one card showing 1-5% scores slightly higher.
It updates when your issuer reports to the bureaus, usually monthly on the statement date. So a payment made today may not affect your score for 1-4 weeks, depending on the cycle.
Charge cards with no preset limit are not reported with a utilization ratio by most bureaus. Some legacy Amex cards show a high “reported high balance” that briefly confuses some models. In modern scoring, charge cards are generally neutral on utilization.
Yes, because it keeps the balance low on whatever day the statement cuts. Most issuers report on statement date, so a mid-month payment followed by a just-before-statement payment ensures the reported balance stays low.
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