How does this UK credit card payoff calculator work?

Enter each debt balance, APR, and minimum payment, then add an extra monthly payment. The calculator simulates debt avalanche and debt snowball month by month to show total interest and debt-free date for both methods.

Which is better in the UK: snowball or avalanche?

For total interest, avalanche usually wins because it targets the highest APR first. Snowball can still be useful if psychological momentum helps you stick to repayments.

Can I include overdrafts and loans too?

Yes. You can include overdrafts, personal loans, store cards, and credit cards. Add each one with its current balance, annual rate, and monthly payment.

Credit Card Payoff Calculator UK

Use our free UK calculator to compare debt snowball and debt avalanche in one place. Enter your balances, APRs, and minimum payments to see exactly how much interest each method costs and when you become debt-free.

Ready to calculate your plan? Open the live calculator and add your debts now.

Open the UK payoff calculator

What this calculator shows

Total interest paid under avalanche and snowball
Debt-free date for both methods
Payoff order by account
Balance-over-time chart versus minimums only

Debt snowball vs debt avalanche in plain English

Debt avalanche means paying minimums on all debts, then putting every extra pound on the highest APR debt first. This usually minimises total interest and often gets you debt-free sooner.

Debt snowball means paying minimums on all debts, then putting extra money on the smallest balance first. It can improve motivation through quicker “wins,” but usually costs more interest overall.

Factor	Avalanche	Snowball
Total interest	Usually lower	Usually higher
Payoff speed	Usually faster	Sometimes slightly slower
Motivation	Math-focused	Psychology-focused

How to get accurate results

Use your latest statements and enter each debt as its own row. For each debt, include balance, annual rate, and minimum payment. Then set a realistic extra monthly payment you can maintain every month. Consistency matters more than aggressive short-term overpayments.

If you have mixed debt types, include all of them (cards, overdraft, loan, store card). The tool compares methods using the same monthly budget so results are fair and actionable.

Practical UK payoff workflow

Most people get the best results by running three scenarios with the same debt data: minimums only, debt snowball, and debt avalanche. Minimums-only shows your baseline cost. Snowball shows motivation-first momentum. Avalanche shows the likely lowest-interest route. Compare all three before deciding.

Once you pick a method, automate your core monthly repayments so the plan continues even during busy months. Then review every 60 to 90 days or whenever interest rates change. Strategy is not a one-time decision; it improves with updates.

Signals your plan is working

Your total debt trend falls month by month, not just occasionally.
Your interest paid each month starts shrinking over time.
At least one balance clears within your first 3 to 6 months.
Your debt-free date moves closer when you increase extra payments.