Debt Payoff Calculator

Snowball and avalanche run side by side on a real amortisation schedule, so you can see what the choice costs before you make it.

List each debt with its balance, APR and minimum. The file computes months to clear and interest paid at the minimum, and highlights any debt whose minimum never clears the balance because it is not covering the interest. Add your realistic extra payment and both strategies run in full — each debt in order, with every cleared minimum cascading onto the next.

WHAT'S INSIDE

Start Here — how the file works and which cells are yours

Debts — balance, APR, minimum, months at minimum, interest at minimum, and the payment needed to clear by a date you choose

Snowball — smallest balance first, with the cascade modelled debt by debt

Avalanche — highest rate first, same schedule

Comparison — months to freedom and total interest, side by side, with the difference

THE PART NOBODY ELSE BUILDS

Both methods send the same money out each month, so the only thing that differs is the order debts clear in — and every time one clears, its minimum is freed and rolls onto the next. That cascade is what separates the two, and it is exactly what a simple calculator leaves out. This one carries it through the whole schedule, including the debts that wait, so the months and the interest are numbers you can act on rather than a rule of thumb about motivation.

WHAT YOU GET

Excel workbook (.xlsx)

Google Sheets template — one click to copy

Setup instructions (PDF)

Walkthrough video — private link inside your download

Free updates for life

BEFORE YOU BUY

Works in Microsoft Excel and Google Sheets. No app, no subscription, no account. Built in EUR with ISO dates. Digital download — all sales final.