List your debts, set what you can pay each month, and see which order clears them fastest and cheapest. Compare the two proven strategies side by side.
Avalanche always costs less interest, because it targets the highest rate first. Snowball clears individual debts sooner, which many people find easier to stick with. This calculator shows the exact cost of choosing motivation over math.
When a debt is paid off, its minimum payment is added to the amount attacking the next debt. Your total monthly outlay stays flat while payoff accelerates, which is why the final debts fall so quickly.
On high rate debt, minimum payments can barely cover the interest, and the balance may never fall. If no payoff date can be found, the calculator warns you that the payment is too small to amortize the debt.
Compare the interest rate against the return you expect from investing. Clearing debt at 20 percent is a guaranteed 20 percent return, which is very hard to beat. Low rate debt is a much closer call.
How this works: each month interest accrues on every balance, minimum payments are made, and everything left in your budget attacks one target debt: the highest-rate debt (avalanche) or the smallest balance (snowball). As each debt clears, its payment rolls into the next. Estimates for education only; this is not financial advice.