Credit Utilization Calculator
Per-card and overall ratios, plus paydown targets.
One card per line as balance,limit. Example: 1200,5000 means $1,200 balance on a $5,000 limit.
Overall credit utilization
Estimates for planning only, not financial advice.
Credit utilization is balances divided by limits, and it drives about 30% of your FICO score. List each card\'s balance and limit, one per line, and the calculator returns overall utilization, each card\'s ratio, and exactly how much to pay down to hit 30% and 10%. With the defaults ($3,500 across $20,000 of limits), overall utilization is 17.5%: decent, with $1,500 of paydown needed to reach the 10% sweet spot.
How to Use This Calculator
Enter each card on its own line as balance,limit: "1200,5000" for a $1,200 balance on a $5,000 limit. Include every revolving account, even zero-balance cards, because their limits help the ratio. The results show overall utilization with a verdict, a per-card table flagging any card over 30%, and the dollar paydown needed for the 30% and 10% thresholds.
List every card as balance,limit per line. Use current balances from your accounts.
Read overall utilization and the per-card flags. Attack the highest per-card ratios first.
Use the paydown targets: get under 30% first, then push toward 10% before any big credit application.
The Utilization Formulas
Both ratios matter because scoring models penalize maxed-out individual cards even when the overall number looks fine. The paydown formula gives you a concrete dollar target instead of vague advice to "pay down debt": with $3,500 of balances on $20,000 of limits, reaching 10% means paying $1,500. Pay the highest per-card ratio first for score impact, or the highest APR first for money savings; the two strategies sometimes point at different cards.
Worked Example
Four cards: $1,200/$5,000 (24%), $800/$4,000 (20%), $1,500/$8,000 (18.75%), $0/$3,000 (0%). Total balances $3,500, total limits $20,000: overall utilization 17.5%. Verdict: good, under the 30% guideline. To reach 10%: pay $3,500 - $2,000 = $1,500. The smartest $1,500 targets the $1,200 card first (highest ratio at 24%), then $300 off the $800 card. Afterward: $0/$5,000, $500/$4,000 (12.5%), $1,500/$8,000 (18.75%), $0/$3,000: overall $2,000/$20,000 = 10.0%, no card above 30%, one card showing active use.
Utilization Targets
| Utilization | Score impact |
|---|---|
| Under 10% | Excellent: best-score territory |
| 10 to 30% | Good: safe for most purposes |
| 30 to 50% | Fair: dragging the score down |
| Over 50% | Poor: major score damage |
| Over 90% on any card | Severe: maxed-out flag |
Remember the reporting lag: issuers report statement balances monthly, so today\'s payment shows up in one to two cycles, and utilization has no memory in current scoring models. Before a mortgage application, get under 10% two months out and freeze new applications. For the debt behind the ratios, our credit card payoff calculator builds the paydown plan, our debt-to-income calculator covers the lender\'s other big ratio, and our budget planner keeps balances from creeping back.
Estimates for planning only, not financial advice.
Frequently Asked Questions
What is credit utilization?
Credit utilization is the share of your available credit currently in use: balances divided by credit limits. With $3,500 of balances on $20,000 of total limits, utilization is 17.5%. It is the second-biggest factor in FICO scores after payment history, worth about 30% of the score, which makes it the fastest lever most people can pull.
What is a good credit utilization ratio?
Under 30% is the standard guidance; under 10% is excellent and where the best scores cluster. The lower the better, with one nuance: 0% across all cards can score slightly below 1% to 9%, because the models like seeing responsible use. Keep one card showing a small balance and the rest at zero for the optimal pattern.
Is utilization per card or overall?
Both matter. FICO weighs overall utilization most, but individual cards maxed out hurt too. A $4,500 balance on a $5,000 limit (90%) drags the score even if overall utilization is 15% across high limits elsewhere. This calculator shows both: fix the worst per-card ratios first, then the overall number.
How fast does paying down balances raise my score?
Usually within one to two billing cycles. Card issuers report balances to bureaus monthly, typically on the statement date, so a paydown shows up at the next reporting date. Utilization has no memory in current FICO models: last month's 80% does not haunt you once this month reports 10%. It is the rare score factor you can fix in weeks.
Should I pay before the statement date?
If you want the lowest reported utilization, yes: pay down before the statement closes, because the statement balance is what gets reported, not the balance on the due date. This is the AZEO-adjacent trick enthusiasts use: let one card report a small balance, pay the rest to zero before statements cut. It is legitimate timing, not gaming.
Does closing a card hurt utilization?
Yes, usually: closing a card removes its limit from the denominator while the debt stays. Close a $10,000-limit card while carrying $3,500 on $20,000 of total limits and utilization jumps from 17.5% to 35%. Keep old no-fee cards open with occasional small charges. If a fee card must go, replace its limit first with an increase elsewhere.
Does a credit limit increase help utilization?
Immediately and mechanically: same balances over bigger limits means lower utilization. A $5,000 increase on $20,000 of limits cuts 17.5% utilization to 14%. Many issuers grant soft-pull increases on request every 6 months. It is the easiest utilization improvement available, provided the bigger limit does not tempt bigger spending.
What is the AZEO method?
All Zero Except One: pay every card to zero except one, which reports a small balance (under 10% of its limit). It optimizes the FICO pattern that rewards both low overall utilization and active responsible use. The gains over simply keeping everything low are modest (often 10 to 20 points), so treat it as fine-tuning before a mortgage application, not a lifestyle.
Does utilization affect mortgage approval?
Significantly. Mortgage lenders pull scores where utilization swings matter, and many set their own overlays. Dropping utilization below 30%, ideally below 10%, in the 2 to 3 months before application is one of the highest-ROI moves a buyer can make. Do not open new cards or close old ones during the mortgage process: both moves scramble the score.
Is 0% utilization bad?
Slightly suboptimal, not bad. All-zero balances can score a few points below a tiny reported balance, because the algorithm prefers evidence of active management. The difference is small and the all-zero pattern still beats 30%+ by a mile. If simplicity matters more than squeezing the last points, all-zero is perfectly fine.