Enter your debts and one extra payment. We'll run both methods side by side — your debt-free date, total interest, and exactly how much the avalanche saves you in dollars.
Line shows total remaining balance month by month. Snowball and avalanche are often much closer than people expect — the method you stick with wins.
Our Debt Payoff Toolkit turns these numbers into a printable amortization schedule, a month-by-month payment table, a progress tracker, and a dashboard you update once a month. Works in Excel, Google Sheets & Numbers.
Get the Debt Payoff Toolkit — $9.99 Instant download · Auto-calculating · Free updates · 60-day money-backAvalanche (highest APR first) pays the least interest and reaches debt-free sooner. Snowball (smallest balance first) gives faster psychological wins. In practice the total-interest difference is often small — the method you actually stick with wins.
We assume interest compounds monthly at APR/12, charged on the remaining balance each month, with payments applied after interest accrues. Credit cards actually compound daily; this monthly model is a close, slightly conservative estimate.
Run the calculator with $0 extra. The result shows your true debt-free date and total interest at minimums — which is exactly why making any extra payment matters. The toolkit includes a "minimum-only vs extra" comparison.
Yes. Everything runs in your browser — your data never leaves your device.
This tool provides general financial education and calculations. It is not financial advice. Interest rates, fees, and your personal situation vary — please verify with your lender and consult a qualified professional before making decisions.