Debt avalanche vs snowball: which is better?

Both strategies work the same way: pay the minimum on every debt, then direct every spare dollar at one target debt. When that debt dies, its entire payment rolls into the next target, so the attack grows over time. The only difference is ordering. Avalanche ranks debts by interest rate, highest first; snowball ranks by balance, smallest first.

Avalanche wins on math because every month a high-rate balance survives, it generates more interest than a low-rate one. Example: $5,000 on a credit card at 22%, a $12,000 car loan at 6.5%, and an $8,000 personal loan at 12%. Avalanche targets the card first and typically saves hundreds to thousands in interest versus snowball, which would start with the card here only by coincidence of it being smallest — reorder the balances and the gap appears.

Snowball wins on psychology. Research from the Kellogg School and others found that people who eliminate small balances early are more likely to finish debt repayment entirely, because closed accounts provide visible progress. If your smallest debts also carry low rates, snowball costs real money — but a plan you abandon costs more than an imperfect plan you complete.

A practical hybrid: knock out one or two tiny balances first for momentum, then switch to avalanche ordering for the rest. And if your credit is decent, check whether a 0% balance-transfer card or a lower-rate consolidation loan can shrink the interest problem before you start.

The honest answer is to run both. A debt payoff calculator that supports both methods will show your debt-free date and total interest under each ordering — often the difference is smaller than people fear, which makes choosing the motivating option easy.