After taking inventory, your dread is a table, and the table has an order hiding in it. Now the strategy question: with a fixed amount of money each month above the minimums, which debt gets the extra dollars first? There are two famous answers, and the surprising part is that the best one on paper is not always the one that gets you to the finish line. Debt payoff is a math problem and a motivation problem at the same time, and each method solves one of them.
The shared engine: minimums everywhere, extra on one
Both methods run the same machine. You pay the minimum payment on every debt so nothing falls behind, then put every spare dollar on one target. When that target is gone, the money that was feeding it — its old minimum plus the extra — rolls onto the next target. That rolling, growing payment is why both methods accelerate: your monthly total stays the same, but more and more of it lands on a single shrinking balance.
The only thing the two methods disagree on is which debt is the target.
| Method | Target order | What it optimizes |
|---|---|---|
| Avalanche | Highest APR first | Least total interest — the math-optimal path |
| Snowball | Smallest balance first | Fastest first win — momentum |
Avalanche: cheapest on paper
The avalanche method targets the highest APR first, regardless of balance. The logic is arithmetic: the highest-rate debt generates the most interest per dollar, so killing it first stops the most expensive bleeding. The avalanche always pays the least total interest and finishes at least as fast as any other order. If you run on numbers and will not lose steam waiting for the first balance to disappear, it is the cheapest route there is.
The catch is emotional, not mathematical. The highest-rate debt is often a large balance, so it can take a year before any debt fully disappears. If you need to see a win to keep going, that long first stretch is where the plan dies.
Snowball: built for momentum
The snowball method targets the smallest balance first, ignoring the APR. The logic is psychological: clearing a small debt fast produces a visible win — one fewer bill, one fewer due date, one account closed. That win releases its minimum to roll onto the next-smallest debt, and the sense of progress compounds alongside the money. You are far more likely to finish a plan you can feel working.
The cost is also arithmetic: by ignoring rates, the snowball usually pays more total interest, because a high-rate debt sits untouched while a small low-rate one gets cleared first. It trades some dollars for some motivation.
The same debts, both ways
The method you will actually finish
Here is the line that matters more than the math: the best method is the one you will stick with to the end. A plan that is optimal on paper but abandoned in month four loses to a slightly costlier plan that gets finished. If you do not need early applause, the avalanche saves the most. If you run on visible progress, the snowball's early wins are what keep the plan alive, and finishing a "suboptimal" plan beats quitting an optimal one every time.
You can also blend them: clear one tiny balance first for the morale boost, then switch to strict avalanche order for the rest. Whichever order you use, a written budget is what frees up the extra dollars in the first place. The method decides where they go; the budget decides whether they exist.