Credit utilization — the percentage of your available revolving credit currently in use — is the second-biggest factor in your FICO score after payment history. Unlike payment history, utilization can change in a single billing cycle, making it the fastest lever you can pull to move your score.
How It Is Calculated
FICO calculates both overall utilization (total balances ÷ total limits across all revolving accounts) and per-card utilization. Both factor into the score — a single card maxed out can hurt even if your overall ratio is healthy.
The figure is based on whatever balance is reported to the credit bureaus, which is usually your statement balance — not your spending balance. Paying down before the statement closes resets the reported figure for the next bureau update.
Total reported balances ÷ Total credit limits × 100
The Thresholds That Matter
FICO does not use a continuous scale — it uses tiers. Under 10% is the "ideal" zone for credit-builders, 10%–30% is "good," 30%–50% is "fair," 50%–70% is "high risk," and above 70% is "maxed." Crossing into a lower tier is what produces the biggest score jumps.
For a thin file, dropping from 35% to 28% can move a score 20 points. Dropping from 28% to 8% can move it another 30. The lower you go, the bigger the marginal effect — until you hit zero, which paradoxically hurts slightly versus 1–3% (the system rewards "active use, paid off").
Fast-Lift Tactics
- Pay before the statement closes — the reduced balance is what gets reported.
- Request credit-limit increases (no hard pull at most issuers) to lower utilization without paying anything.
- Spread balances across multiple cards rather than maxing one.
- Keep old cards open and active to maintain total available credit.
Utilization is the cleanest, fastest credit-score lever in the system. Pay below 30% to be "good," below 10% to maximize the score effect. Aim for low single digits in the months before any major loan application.
