Paying Off Debt Strategically
The avalanche method targets the highest interest rate first and saves the most money on paper. The snowball method targets the smallest balance first and tends to actually get finished. Both are legitimate — they're optimizing for different things.
Worth reading first: What a Credit Score Actually Measures
Multiple debts and one monthly budget raises an actual question: which one gets the extra dollar? Two answers are both defensible, and they optimise for two different things — total cost, and whether you actually finish.
The avalanche method attacks the highest rate first
Avalanche:pay the minimum on every debt, then send every extra dollar to whichever balance carries the highest interest rate. Once that one's gone, roll its entire payment into the next-highest rate, and so on. This minimises total interest paid, mathematically, every time — the highest rate is where each extra dollar prevents the most future interest.
The snowball method attacks the smallest balance first
Snowball: pay the minimum on every debt, then send every extra dollar to whichever balance is smallest, regardless of rate. It usually costs somewhat more in total interest, but it clears an entire debt off the list fastest — a visible finish line early on, which is what keeps a lot of people actually sticking with the plan for the debts still ahead.
Avalanche — highest APR first
Debt-free in 28 months. Total interest paid: $1,790.
Snowball — smallest balance first
Debt-free in 28 months. Total interest paid: $1,863 — clears Card B first, which is where the early motivation comes from.
The math favors one, the motivation favors the other
The chart above runs both methods on the same three debts with the same monthly budget. Avalanche finishes with less interest paid, in most cases. Snowball clears its first debt sooner, which is a real, measurable effect on the odds that someone follows the plan all the way through.
Key takeaways
- Avalanche directs extra payments to the highest interest rate first, which minimises total interest paid across every debt.
- Snowball directs extra payments to the smallest balance first, clearing a full debt sooner at a modest interest cost.
- Both methods pay the same minimums on every other debt — they only differ in where the leftover budget goes.
- The right choice depends on you: avalanche wins on pure math, snowball often wins on follow-through.