Credit Utilization Calculator (per-card and overall)
Add each credit card with balance and limit. Returns total utilization, per-card utilization, and a category — excellent, good, fair, poor — based on the standard FICO scoring thresholds (under 10%, 10-29%, 30-49%, 50%+).
Your credit cards
- Overall utilization
- 11.3%
- Total balance
- 1,700
- Total limit
- 15,000
Healthy but with room to optimize. Dropping under 10% can add 5-15 FICO points for some profiles.
How it works
How utilization affects your FICO score
Credit utilization — the ratio of revolving credit card balances to limits — is the second-largest factor in your FICO score, after payment history. It accounts for roughly 30% of the score. The score model rewards low utilization sharply: under 10% is the optimal zone, and dropping from 30% to 9% commonly gains 20-50 points within one statement cycle.
FICO calculates utilization at two levels: overall (sum of balances ÷ sum of limits across all revolving accounts) and per-card (each card's balance ÷ that card's limit). High utilization on any single card hurts even if your overall is low. This is why one maxed-out card can cost more points than you'd expect from the overall ratio alone.
Why thresholds aren't smooth
FICO doesn't apply utilization linearly — it uses bins. The widely-observed thresholds are 10%, 30%, 50%, 75%, and 90%. Going from 31% to 29% can pop your score noticeably; going from 25% to 12% may not move it much until you cross 10%.
This means timing matters. Pay down a card to 9% on the day it reports to the bureau (the statement closing date, not the due date), and your score reflects that bin until next month. Many people with thin credit files use this to game the score before mortgage applications.
VantageScore (used by some lenders, including auto) is somewhat smoother and weights total balance more heavily than FICO 8/9. If a soft pull shows VantageScore vs FICO discrepancies, this is usually why.
Practical playbook
If you carry no balance: charge small amounts and pay before statement close, so the reported balance is under 10% but greater than zero. Reporting $0 across all cards can actually hurt scores by ~5 points (FICO penalizes 'no recent activity' on revolving credit).
If you carry balances: prioritize paying down cards at 50%+ first to escape the worst bin, then balance to keep overall under 30% and ideally under 10%.
Don't close old cards to 'simplify' — closing reduces total limit, which raises the utilization ratio overnight. Keep zero-balance old cards open for the limit headroom and the age-of-account benefit.
Request a credit limit increase on existing cards every 6-12 months. A $5K → $8K limit on a card with $1500 balance drops that card's utilization from 30% to 19% with no behavior change.
Frequently asked questions
›Should I aim for 0% utilization?
No. FICO slightly penalizes a 0% reported balance across all cards (interpreted as 'no recent activity'). Aim for 1-9% — best practice is one card reporting a small balance and the rest at zero.
›When does my utilization actually report to the credit bureaus?
On the statement closing date (when the bill is generated), not the payment due date. Many people pay before the due date and assume that's when utilization is calculated — it isn't. Pay before the statement closes to lower the reported number.
›Does paying off a card before the statement help?
Yes. The balance reported to the bureau is whatever sits on the card on the statement close date. Paying it down 1-3 days before close means that lower number is what the bureau sees, regardless of due date.
›Do installment loans count toward utilization?
No. Utilization is revolving-credit-only (credit cards, lines of credit). Auto loans, mortgages, and student loans are installment debt and don't factor into utilization. They still affect DTI and credit mix.
›I have one card at 80% but overall is 25%. How bad is that?
Worse than 25% overall implies. FICO looks at the highest single-card ratio independently. Expect 15-30 points lost compared to all cards under 30% even though the overall looks fine.
›Will closing an unused card hurt my score?
Almost always yes, in two ways: it reduces total credit limit (raising utilization ratio), and over time it shrinks average account age. Only close if there's a fee you can't waive.
›How fast does utilization affect my score?
Within one billing cycle. Lower the reported balance, wait for the statement to cut, the new score reflects it within days. This is the fastest legitimate way to move a FICO score.
›Does this calculator share my data?
No. All math runs in-browser; balances and limits never leave your device.
Related tools
Last updated: