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Credit utilization calculator (UK)

Work out your overall and per-card credit utilization, and how much to repay to reach a target ratio.

Credit utilization calculator

Card 1
Card 2

A common rule of thumb is to keep the ratio under 30%. Lower is generally better.

Overall credit utilization

23.85%

Low — £1,550 owed against £6,500 of limits.

Highest single card
30%

Scoring models look at this as well as the total.

To reach 30%
Already there
Utilization for each card
CardUtilizationTo target
Card 130%£0 of room
Card 214%£400 of room

Utilization is one input among several in a credit-scoring model. No lender publishes a ratio that guarantees an outcome.

Estimate only. This result is produced from the figures you entered and the assumptions listed on this page. It is not financial advice, not a quotation and not an offer, and no provider is bound by it. Check current terms with the provider before acting. Nothing you type here is sent anywhere — the calculation runs entirely in your browser.

How this is worked out

Utilization = total balances ÷ total credit limits × 100

What this assumes

A calculator is only as good as what it leaves out. These are the assumptions built into the result above.

  • Balances are the amounts your card issuers report, which is usually the statement balance rather than what you owe today.
  • Utilization is shown both overall and per card. Scoring models look at both, and weight them differently.
  • Bands are descriptive. No lender publishes a utilization figure that guarantees an outcome.

Educational information only. This page explains how something works in the United Kingdom. It is not financial advice and does not take account of your circumstances. Rates, fees and eligibility change without notice — check the provider’s own terms before you act.

For free, impartial guidance, see MoneyHelper. To complain about a firm, contact the Financial Ombudsman Service.

Guides that go with this tool