Credit utilization is the ratio of your credit card balances to your credit limits, and it makes up 30% of your FICO score — the second largest factor after payment history. Unlike payment history, utilization can change fast: pay down a balance today, and the improvement can show up on your score within a single billing cycle once the new balance is reported.
The Basic Formula
Utilization = Total Balances ÷ Total Credit Limits × 100
Worked Example
| Card | Balance | Limit |
|---|---|---|
| Card A | $800 | $5,000 |
| Card B | $1,200 | $3,000 |
| Card C | $0 | $2,000 |
| Total | $2,000 | $10,000 |
$2,000 ÷ $10,000 = 20% overall utilization — within the commonly cited 30% guideline.
Overall vs. Per-Card Utilization
Scoring models look at both your overall utilization across all cards combined, and your utilization on each individual card. This means a single maxed-out card can hurt your score even if your overall number looks fine.
| Scenario | Overall Utilization | Per-Card Issue | Risk |
|---|---|---|---|
| $2,000 balance spread across 3 cards with $10,000 combined limit | 20% — looks fine | None | Low |
| $2,000 balance entirely on one $2,000-limit card, other cards at $0 | 20% — same overall number | 100% on that one card | Higher — the maxed card can drag the score down more than the overall number suggests |
What Counts as "Good" Utilization
| Utilization | General Impact |
|---|---|
| 0% | Can slightly underperform very low utilization — some active use is generally viewed favorably over none at all |
| 1-9% | Generally considered ideal by most scoring models |
| 10-29% | Good — below the commonly cited 30% threshold |
| 30-49% | Starting to work against you |
| 50%+ | Significant negative impact, increasingly so as it climbs toward 100% |
Fast Ways to Lower Utilization
- Pay down the highest-utilization card first — since per-card ratios matter, concentrate payments on whichever card is closest to its limit.
- Make a payment before your statement closes, not just before the due date — utilization is calculated from whatever balance is reported to the bureau, which is typically your statement closing balance, not what you owe by the due date.
- Ask for a credit limit increase on a card you already have in good standing — a higher limit with the same balance immediately lowers your ratio (though this may involve a hard inquiry, so check with the issuer first).
- Avoid closing cards while trying to lower utilization — closing a card removes its limit from your total, which can raise your overall ratio even if your balance does not change.
Want the full weighted breakdown of what affects your score? See What Affects Your Credit Score? for all 5 factors, or Credit Score Ranges Explained to see what improvement could unlock for you.
Utilization is only part of the picture. If negative items are also dragging down your payment history, CreditShiftrr can help. Learn about CreditShiftrr →
