Debt Snowball vs Avalanche — The Math, the Psychology, and Why Both Work

There are two standard methods for paying off multiple debts, and the argument between them is one of the oldest in personal finance. Both use the same structure: pay minimums on everything, then aim every spare dollar at one target debt until it is gone, then roll that payment into the next target.

The avalanche: highest rate first

The avalanche orders debts by interest rate, highest first. The arithmetic is unambiguous: this minimizes total interest paid and finishes fastest. A 24 percent card costs more per dollar per month than a 7 percent loan, so dollars sent at the card do more work. On a spreadsheet, avalanche wins every time.

The snowball: smallest balance first

The snowball orders debts by balance, smallest first, ignoring rates. The case for it is behavioral: clearing a whole account early produces a visible win, and published research on debt repayment behavior has found that people who concentrate payments and close accounts early are more likely to continue the plan. The snowball pays for its extra interest cost in momentum.

The honest comparison

The interest difference between the two methods is real but often modest, especially when the debts have similar rates or the payoff window is short. The dominant variable in every payoff plan is not the ordering. It is whether the extra payments keep happening month after month. A method that gets followed beats a method that gets abandoned, whichever one that turns out to be. Listing every debt with its balance, rate, and minimum in one place is the common starting point for either method, and the free Obsidian Tracker is built for exactly that kind of one-screen view.

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Educational only. Not financial advice. Results not guaranteed. We are not financial advisors.