Debt

Balance Transfer Calculator

A 0% balance transfer can be valuable, but the fee and the balance left when the promotional period ends matter. This calculator puts both routes side by side.

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Your current card

Start with the debt you would otherwise keep where it is.

£
The amount you intend to move.
%
£
Use the same monthly payment for both scenarios so the comparison is fair.

Balance-transfer offer

Enter the real terms of the deal you are considering.

%
Often charged as a percentage of the balance moved.
%
months
%
Use the purchase/balance-transfer rate that would apply after the promotional period.

Your estimate

Use the result as a planning guide and change inputs to test the assumptions that matter most.

How this calculator works

The transfer scenario adds the transfer fee to the opening balance, applies the promotional APR for the promotional period and then switches to the post-promotion APR. The comparison scenario keeps the existing card APR throughout.

How to use it

  1. Enter the balance, existing APR and the monthly amount you can repay.
  2. Add the proposed transfer fee, promotional rate and promotional period.
  3. Enter the APR that would apply after the promotion ends.
  4. Compare total cost and whether the balance is fully cleared within the promotional period.

Assumptions and limitations

The model assumes no new spending, no missed payments and no loss of the promotional rate. Provider-specific fees, minimum payments and eligibility are not modelled. A balance-transfer application can affect your credit profile.

Understand the decision

Helpful guides for this calculator

Use the calculator for the numbers, then use these guides for the practical choices, trade-offs and next steps behind the result.

All articles
Useful comparison

Debt Snowball vs Debt Avalanche: Which Repayment Method Actually Works?

Read this guide before using a balance transfer as part of a wider debt repayment plan.

9 min read · Read guide → Useful comparison

Debt Help: What To Do When You Cannot Keep Up With Payments

Read this guide before using a balance transfer as part of a wider debt repayment plan.

9 min read · Read guide →