Credit Utilization Calculator: How Far to Pay Down for Your Score
Utilization — balances ÷ credit limit — is about 30% of your FICO score, the biggest lever after payment history. See your ratio and the exact amount to pay before the statement closes to clear the 30% and 10% thresholds. Math runs locally.
The fastest lever on a credit score you don't already control
Payment history is the biggest factor in a FICO score, but it's slow — one missed payment lingers for years and there's no way to speed up a clean record. Utilization is the opposite: it makes up about 30% of the score and resets every statement. Pay a $3,500 balance on a $10,000 limit down to $3,000 before the statement closes and your reported utilization drops from 35% to 30% that cycle — no waiting. This is the single fastest thing most people can do to nudge a score before a mortgage or auto application.
Two nuances the headline ratio hides: there's no benefit to carrying a balance (the "you need debt to build credit" myth is false — pay in full), and per-card utilization matters too, so a single maxed card can hurt even if your overall ratio looks fine.
How the math works
- Utilization = total reported balances ÷ total credit limit.
- Pay-down to a threshold = balance − (threshold × limit). To reach 30% on a $10,000 limit, get the balance to $3,000.
- Bands: under 10% is excellent, under 30% is good, 30-50% starts to drag, over 50% is a real weight, over 75% is severe.
Source: myFICO score composition (amounts owed ≈ 30%) and CFPB on credit utilization.
Math runs locally. Inputs never leave your browser. Source on github.
Where this doesn't apply
- One card is maxed. A single card at 95% can hurt even if your overall ratio is 20%. Spread balances or pay down the worst card first — the overall number here won't show that.
- You're about to close a card. Closing a card removes its limit, which can spike your utilization overnight. Check the new ratio before you close anything.
- Timing matters more than you think. Issuers report the statement balance, not what you owe today. Paying after the statement closes won't change what's reported that month — pay before the closing date.
- You're carrying a balance to "build credit." That's a myth and it costs you interest. Use the card and pay in full; utilization is measured at the statement, not by whether you revolve.
What to actually do
- Find your total reported balances and total limits across all cards — the statement, not your live balance.
- If a score bump is the goal, pay the balance below 30% (or 10% for the best effect) before the statement closing date.
- Ask for a credit-limit increase on a card you'll pay in full — a higher limit lowers utilization without paying anything down.
- Don't close old cards before a big application; you'd lose their limit and raise your ratio.
- For the underlying balance itself, the Credit Card Payoff tool shows the fastest way to clear it for the least interest.