Financial decision guide and interactive simulator

Debt payoff calculator

Which repayment order saves interest while keeping the plan workable?

What this calculation is designed to show

Avalanche repayment prioritises high rates, while snowball repayment prioritises small balances. The mathematically cheapest method is only useful when its total monthly payment fits the household's cashflow.

How to test the decision

Keep a basic emergency buffer before sending every spare amount to debt. Test a smaller extra payment and check minimum payments, payoff time and total interest together.

Using the result responsibly

Change one important assumption at a time and compare a cautious case with the expected case. The interactive calculator below updates from the values you enter. Its output is an educational estimate, not financial, tax, legal or investment advice.

Read the calculation methodology or learn about The Finance Check.