Debt Snowball vs Avalanche Calculator

Two methods dominate debt payoff, and they disagree on one question: which balance do you attack first with any spare money? The avalanche pays the highest interest rate first, because that is mathematically the cheapest order. The snowball pays the smallest balance first, because clearing a whole debt quickly is motivating and no single payment is wasted. Both require the same discipline — keep paying the same total every month and roll each finished payment into the next debt. The avalanche almost always costs less in interest, because it removes the most expensive money first. The gap depends on how different the rates are: with a twenty-four per cent card next to a nine per cent loan, the avalanche saves real money. If all your debts carry similar rates, the two methods land almost in the same place, and the difference becomes a rounding detail rather than a strategy. The snowball almost always feels better, and that matters more than it sounds. Paying off a small balance in a few months gives an early win that keeps people going, while an avalanche can mean months of payments before any account closes. Research and experience both suggest that the method you actually stick with beats the one that is theoretically optimal, so motivation is not a soft consideration; it is part of the result. This calculator runs both orders through the same simulation with a fixed monthly pot, then reports months and total interest for each. It assumes two debts with minimum payments of one per cent and a twenty-five dollar floor, and a fixed rate throughout. Use it to see how much the choice actually costs you here, then pick the method you will keep using.

This calculator returns estimates for general information only. It is not financial, investment, tax or legal advice, and it cannot replace guidance from a qualified professional who knows your circumstances. Figures such as loan payments, investment growth and retirement projections are simplified models based on the inputs and assumptions you provide, not guarantees of future results.