Same money, two orders of attack
Both strategies follow the same rule: pay the minimum on everything, and throw every extra dollar at a single target debt until it dies — then roll its entire payment into the next target. The only difference is the order of targets. The snowball goes smallest balance first, trading a little interest for early victories. The avalanche goes highest rate first, which is always the cheapest path in dollars.
The right question isn’t “which is optimal?” — it’s “how much does optimal actually pay me?” If the avalanche saves $180 over three years, take whichever keeps you motivated. If it saves $3,000, that’s a real argument for gritting your teeth through the big ugly balance first. The calculator above answers it with your numbers.
Making either method work
- Automate the minimums so a missed payment never adds fees or penalty APRs to the plan.
- Fix the extra amount as a recurring transfer the day after payday — money that sits in checking gets spent.
- Roll over payments immediately. The power of both methods comes from the growing payment hitting each successive target.
- Stop adding debt. A card that keeps getting used is a bucket with a hole in it; freeze it until the plan is done.
Frequently asked questions
What is the difference between the debt snowball and the debt avalanche?
Both methods pay minimums on every debt and direct all extra money at one target debt. The snowball targets the smallest balance first — quick wins for motivation. The avalanche targets the highest interest rate first — mathematically optimal. When a debt is paid off, its payment rolls into the next target.
Which method saves more money?
The avalanche always saves at least as much interest as the snowball, because it kills expensive debt first. But the gap is often smaller than people expect — run your own numbers above. If the difference is small, the strategy you actually stick with is the better one.
Why do so many people recommend the snowball if the avalanche is optimal?
Behavior beats math when the math difference is small. Research on debt repayment (including work published in the Journal of Consumer Research) suggests people who close accounts early are more likely to stay on plan. Paying off a small card in month two keeps you going; a giant 24% balance that takes two years to crack can be demoralizing.
Should I include my mortgage or student loans?
Usually no for the mortgage — its rate is typically far lower and the balance distorts the comparison. Low-rate federal student loans are also often excluded, especially if they carry forgiveness or income-driven options. Focus the comparison on consumer debt: credit cards, personal loans, auto loans, and high-rate private loans.
What if I can’t pay more than the minimums?
Neither method works without an extra amount — that extra is the engine. If there is truly nothing to add, the first move is a balance-transfer card or a consolidation loan to cut the interest rate, or a hardship plan with your issuer. Even $50/month of extra payment changes the picture; try it in the calculator.