Free tool
Debt Payoff Calculator
List what you owe, choose a strategy, and see your debt-free date — plus what a little extra each month really does.
Your debts
| Name | Balance | APR | Min. monthly |
|---|
Your figure. This calculator reports what it does with it — it doesn't ask you for a number and it doesn't suggest one. £0 is a complete answer.
Both strategies pay every minimum, then aim everything extra at one target debt. When a debt clears, its payment rolls onto the next — that's the snowball effect. The two are listed alphabetically. This calculator doesn't choose between them — switch the strategy and the figures update, so you can read both.
Debt-free in
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Total interest you'll pay
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Saved vs minimums only
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Payoff order
▬ minimums only ▬ your plan
How avalanche and snowball differ
Avalanche sends your extra payment at the debt with the highest APR.Snowball sends it at the debt with the smallest balance. That is the whole difference: under both, every minimum is still paid, every month, on every debt.
Each ordering does something different with the same money. Avalanche removes the most interest — that isn't a study, it's what the arithmetic does, because interest builds fastest on the highest rate. Snowball aims at the balance that takes the least money to finish, so the first debt to disappear is the smallest one. The calculator runs whichever you pick and reports what it does, and the payoff order underneath shows which debt goes when.
The simulation applies each debt's APR monthly, pays every minimum, and sends the extra to the target debt, rolling freed-up payments forward. It assumes rates and minimums stay fixed. It stops counting at 50 years: past that it reports 50+ years in place of a date, and where minimums alone would never clear the balances inside 50 years the saved figure reads Not comparable, because there is no finite total to compare against.
This is a calculator: it works out what your own figures do. InfiniteMB is not authorised by the Financial Conduct Authority, and nothing here is debt advice or financial advice. The people who can look at your actual situation do it for free: Citizens Advice, MoneyHelper, National Debtline and StepChange. All four are impartial, they cover every route, and none of them sells a debt solution. Listed alphabetically. There's no shame in going to any of them, ever.
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