Two proven ways to crush debt: smallest balance first for fast wins, or highest interest first for the lowest cost. See which clears your debt sooner, which saves the most money, and exactly what the difference is.
The two methods. Both pay every debt's minimum each month, then pile all your extra money onto one target debt. Avalanche targets the highest interest rate first — this always costs the least and is usually fastest. Snowball targets the smallest balance first — you clear individual debts quicker, which builds momentum and motivation.
The cascade. When a debt is paid off, its minimum payment plus your extra "rolls over" onto the next target — so your monthly firepower grows as debts fall. That rolling snowball/avalanche effect is what makes either method dramatically faster than paying minimums forever.
Interest. Each month, interest accrues on every remaining balance at its APR ÷ 12, then payments are applied. The calculator runs month by month until every debt hits zero, tracking total interest paid and the payoff date.
Which to choose. Avalanche wins on pure math — less interest, often less time. But snowball's quick early wins keep many people in the game who'd otherwise give up. The best method is the one you'll actually stick with; this tool shows you exactly what choosing motivation over math costs, so you can decide with eyes open.
Assumes fixed interest rates and that you keep paying the same total every month. Doesn't model new charges, fees, promotional 0% periods, or minimums that shrink as balances fall.