Debt Payoff Calculator UK 2025
Add all your debts — credit cards, loans, overdrafts — and compare the snowball and avalanche payoff methods to find the fastest and cheapest route to becoming debt-free.
| Debt | Balance | APR | Min. Payment |
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Snowball vs Avalanche — which should you choose?
The debt snowball pays off the smallest balance first, regardless of interest rate. Once the smallest debt is cleared, its payment rolls onto the next smallest. The psychological wins of clearing individual debts quickly motivate many people to stick with the plan — research suggests snowball users are more likely to complete their debt payoff.
The debt avalanche targets the highest-interest debt first. This is mathematically optimal — you always pay the least total interest. The downside: if your highest-rate debt is also your largest, it may take a long time before you see your first debt cleared, which can make it harder to stay motivated.
In practice, the difference in total interest between the two methods is often surprisingly small. If the snowball keeps you on track and the avalanche doesn’t, snowball wins.