Debt Payoff Calculator

The debt avalanche method pays the minimum on all debts and directs any extra payment toward the debt with the highest interest rate. Once that debt is paid off, the freed-up payment (minimum + extra) rolls to the next highest-rate debt. Mathematically, avalanche minimizes total interest paid and is the fastest way to become debt-free when comparing by dollars spent.

The debt snowball method pays minimums on all debts and directs extra payments toward the debt with the lowest balance. Once that debt is cleared, the freed-up payment cascades to the next smallest balance. Snowball produces quick psychological wins by eliminating accounts faster, which helps many people stay motivated and stick to the plan.

Avalanche almost always saves more money in total interest. The difference depends on your specific debts — if the highest-rate debt also has a small balance, the methods may produce similar results. Snowball wins on motivation because you see debt accounts disappear faster. The best method is the one you'll actually stick to.

Even $50–$100 extra per month can dramatically cut total interest and shorten your payoff timeline. The calculator shows exactly how much your chosen extra payment saves. If budget is tight, start small — what matters is consistency. As debts are paid off, the freed minimums automatically accelerate the remaining debts.

The freed payment — the minimum you were paying plus any extra — rolls to the next debt in line. This is the "rollover" effect that makes both snowball and avalanche accelerate over time. Each payoff makes the next one faster. That's why consistency matters more than the size of the initial extra payment.

If you have high-rate debt like credit cards (18–30% APR), avalanche typically saves hundreds or thousands of dollars versus snowball. The interest rate gap matters: if your rates are clustered (all 5–8%), the methods produce nearly identical results and snowball's motivational benefit may outweigh the small mathematical advantage of avalanche.

Yes — a hybrid approach targets high-rate small-balance debts first (combining the wins of both methods). It's not a named strategy but often outperforms pure snowball while delivering faster wins than pure avalanche. To model it, simply reorder your debts manually before running the calculator.

The calculator computes exact month-by-month amortization for each debt, applies minimum payments, and rolls freed payments to the next priority debt. Results assume you make all minimum payments on time and apply the extra payment every month. Actual totals may vary if rates change (variable-rate cards) or payments are missed.

A snowball rolling downhill gets bigger as it picks up more snow. When you eliminate the smallest debt, the freed monthly payment (minimum + extra) adds to the next debt's payment. Each payoff makes the next one faster. The "snowball" grows with each eliminated account until all debt is gone.

Set extra payment to $0 in the calculator to see your baseline payoff date using minimums only. Even minimum payments eventually retire the debt — but the timeline (and total interest) will be significantly longer. Any amount above minimums helps. The calculator shows exactly how much each dollar of extra payment is worth.