Credit utilization
Also known as: Utilization ratio, Revolving utilization
The ratio of revolving credit balances to revolving credit limits, expressed as a percentage. Both aggregate utilization (across all cards) and per-card utilization matter. The second-largest FICO factor (30%) and the lever most readily adjustable in 30–60 days.
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Credit utilization is the percentage of available revolving credit currently in use. The calculation: divide the reported balance on your revolving accounts (credit cards, lines of credit) by the credit limit on those accounts. A consumer with $2,000 in reported balances against $20,000 in total limits has 10% aggregate utilization. The same consumer can also have per-card utilization figures — $1,500 of $5,000 on one card (30%) and $500 of $15,000 on another (3%). FICO and VantageScore both consider both per-card and aggregate figures, with different exact weights.
The conventional advice — "keep utilization below 30%" — is wrong, or at least imprecise. FICO's published data and analysis from third-party FICO researchers strongly suggest that scores are materially higher at utilization below 10% than at utilization between 10% and 30%. Going from 30% to 9% utilization commonly boosts FICO by 20–60 points. Going further to 1–5% utilization is sometimes worth another 5–15 points at the top of the score range. The most consistently empirically supported guidance is: keep aggregate utilization below 10%, and ideally between 1% and 5% before any major credit application.
Per-card utilization matters separately from aggregate. A consumer at 8% aggregate utilization but with one card maxed out (95%) and others at low balances often scores lower than a consumer at 8% aggregate with all cards under 10%. The AZEO tactic — All Zero Except One, paying down all cards to report at zero except one with a small positive balance — exploits this property. The cards-reporting-zero-balance configuration helps both per-card and aggregate utilization simultaneously, lifting FICO by 10–40 points for the credit cycle that AZEO is in place.
Timing matters because utilization is calculated from what your cards report to the bureaus, not what your day-to-day balance is. Most cards report once a month around the statement closing date — so the balance on that day is what your FICO sees for the next 30 days. A consumer who routinely carries a $4,000 balance on a $10,000 limit (40% utilization) but pays down to $500 before the statement closes will appear to FICO as 5% utilization. The two operational implications: (a) paying down before the statement closes is more effective for FICO than paying down after, and (b) the timing of any planned credit application should follow the statement-close-and-bureau-report cycle, not just calendar time.
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- FICO Score The 300–850 credit score produced by the Fair Isaac Corporation's scoring models. The score model used by the majority of US lenders for consumer credit underwriting. Calculated from bureau data on payment history, amounts owed, length of credit history, credit mix, and new credit.
- AZEO (All Zero Except One) A pre-application FICO optimization tactic: pay down all credit card balances to report at zero on the statement closing date except one, which reports a small positive balance (1–9% of its limit). Frequently boosts FICO 10–40 points temporarily.
- Hard pull A lender-initiated credit inquiry triggered by an application for new credit. Appears on your credit report, typically lowers FICO by 2–5 points for 12 months, and ages off entirely after 24 months.
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