Debt Payoff Calculator
This is the calculation a paper tracker cannot do: real amortization, month by month, so you can see exactly when each debt disappears and how much interest you actually save.
Buy for $9 Instant download · secure checkout via Gumroad
What's inside
- Compares the snowball and avalanche methods side by side
- Shows your true payoff date and total interest paid
- Tells you what one extra payment per month really changes
- Updates automatically as you enter balances and rates
Details
- Works in Microsoft Excel and Google Sheets
- Formulas already built in — just type your numbers
- Instant digital download
Who it's for
For anyone who wants a real date rather than a feeling. This is the calculation a paper tracker cannot do: month-by-month amortization across all your debts, showing the payoff date and the total interest for both the snowball and the avalanche method side by side. It answers the two questions that actually change behaviour — which order costs less, and what an extra fifty a month is worth. Usually the answer to the second is months off the end, which is more persuasive than any amount of encouragement.
How to use it
- Enter each debt: balance, interest rate and minimum payment. The rate matters most and is the one people most often guess — check a statement.
- Enter what you can pay in total each month, including the minimums.
- Read the two payoff dates. The gap between snowball and avalanche is your cost of choosing motivation over maths — sometimes trivial, sometimes a year.
- Try an extra payment in the spare field and watch the date move. That number is the argument for the sacrifice.
- Revisit after each cleared debt, because the rolled payment changes everything downstream.
Questions
Snowball or avalanche — which does it recommend?
Neither. It shows both with your own numbers, because the right answer depends on you: the avalanche always costs less in interest, the snowball is more often finished. If the difference is small, pick the one you will stick to.
Does it handle credit cards and loans together?
Yes — any mix of fixed-rate debts: cards, personal loans, car finance, overdrafts, family loans. It does not model variable rates changing mid-term or promotional 0% periods that expire, so treat those results as approximate.
Is my financial data sent anywhere?
No. It is a spreadsheet file that runs on your own computer or your own Google account. Nothing is uploaded, no account is required, and we never see any figure you enter.
This is a digital product — nothing is shipped. Files are available to download immediately after checkout.