Debt Snowball Calculator

Both keep paying every debt's minimum and throw all spare money at one debt at a time. The snowball method targets the smallest balance first for fast, motivating wins; the avalanche method targets the highest interest rate first, which always pays the least total interest. This calculator lets you compare both.

Each month it adds interest to every balance, pays the minimum on all debts, then applies your extra payment — plus the minimums freed up by any debts already cleared — to the focus debt. Snowball focuses on the smallest balance, avalanche on the highest APR. As each debt is paid off, its payment rolls onto the next one.

If your total monthly payment is smaller than the interest accruing on your balances, the debt grows faster than you pay it down and never reaches zero. That warning means you need a larger extra payment, a lower rate, or both. The schedule shown then only covers the simulated horizon, not a real payoff.

No. Every calculation runs entirely in your browser. The balances, rates, and payments you enter stay on this page and are never uploaded to a server or stored after you close the tab.