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Debt avalanche vs snowball: which payoff method to choose
How the debt avalanche and debt snowball work, a worked example with three debts, what each one costs in interest, and how to pick the one you will stick with.
You have a credit card, a car loan, maybe a personal loan, and you want them gone. Every guide you read seems to argue about one thing: the debt avalanche or the debt snowball. People defend each one as if it were a team.
Both methods work, and they share almost everything. They differ in one choice: which debt gets your extra money first. This guide explains how each works, runs both on the same three debts, and helps you pick the one you will actually stick with.
How the debt avalanche and debt snowball work
Both methods follow the same three rules:
- Pay every minimum, every month. No debt is ignored.
- Put all your extra money on one debt at a time, the target.
- When the target is paid off, roll its minimum into the extra and move to the next target. The amount aimed at the next debt grows each time, which is where the snowball name comes from.
The only difference is how the target is picked:
- Avalanche: the highest interest rate first. Because the most expensive money goes first, it always costs the least total interest.
- Snowball: the smallest balance first. It usually costs a little more, but the first debt disappears sooner, and many people keep going because of that early win.
A worked example with three debts
Say you owe on three debts and can pay $300 a month on top of the minimums:
| Debt | Balance | Yearly rate | Minimum |
|---|---|---|---|
| Credit card | $6,500 | 22.9% | $160 |
| Car loan | $9,800 | 6.4% | $290 |
| Personal loan | $1,800 | 9.5% | $75 |
Avalanche targets the credit card first (22.9%). Snowball targets the personal loan first ($1,800). Here is how it plays out, month by month, with interest added each month:
| Avalanche | Snowball | Minimums only | |
|---|---|---|---|
| First debt cleared | Month 17 (card) | Month 5 (personal loan) | Month 27 |
| Debt-free | Month 25 | Month 25 | Month 79 |
| Total interest | $2,176 | $2,412 | $7,374 |
Three things stand out.
First, the avalanche saves $236 here. Real money, but not life-changing over two years.
Second, the snowball gives you a finished debt in month five instead of month seventeen. For a lot of people, that early “one down” is what keeps the plan alive through the dull middle.
Third, the method matters far less than the extra $300. Paying only the minimums takes more than six years and costs $5,000 to $5,200 more interest than either method.
How to choose between avalanche and snowball
Ask yourself two questions.
How far apart are your rates? If one debt charges 25% and the rest charge 5%, the avalanche can save a lot, and it is hard to argue against. If your rates are close, the cost of the snowball is small.
What has stopped you before? If you have started debt plans and dropped them, motivation is your real constraint, not arithmetic. The snowball’s early wins are designed for exactly that. If you are steady once you start, take the avalanche.
Either way, the choice is reversible. You can switch next month and nothing breaks, because both methods keep every minimum paid.
How to find the extra money each month
The extra is what makes either method work, so it deserves a line in your budget, not whatever is left at the end of the month.
- Cancel what you do not use. Our guide to subscription costs per year shows how to find it.
- Give extra paychecks and refunds a job. If you are paid every two weeks, two months a year bring a third paycheck.
- Keep the plan and the payoff in sync. If your budget sets aside $525 for debt but your payoff plan assumes $825, the plan is fiction. Make them match.
Common mistakes when paying off debt
- Adding new debt while paying old. If the card is still being used, the balance does not fall. Pause it while it is the target.
- Skipping the emergency fund entirely. Without any buffer, the next car repair goes on the card. A small fund first keeps the plan from sliding back. See emergency funds and the savings rate.
- Ignoring promotional rates that end. A 0% balance transfer becomes an expensive debt on a known date. Plan for that date.
- Only paying minimums on a card. Minimums are set to keep the balance alive for years.
If payments do not even cover the interest, no method will clear the debt. That is the point to talk to your lender or a non-profit credit counsellor about the terms.
How Money Kit helps you pay off debt
On the Debts page of Money Kit, you add each card or loan with its balance, yearly rate and minimum, pick avalanche or snowball, and set an extra amount a month. The kit works out the month you would be debt-free, the interest ahead, and how much interest and how many months you save against paying only the minimums. A chart shows what you owe month by month against the minimums-only line, and a table shows the month each debt is paid off. If your budget plans a different amount for debt than the payoff assumes, the page says so and can match them. These are projections from the numbers you enter, not advice.
Questions
Is the debt avalanche or the debt snowball better?
The avalanche, paying the highest rate first, always costs the least interest. The snowball, paying the smallest balance first, costs a little more but clears the first debt sooner. If an early win keeps you going, the snowball can be the better plan for you.
How much more does the snowball cost?
Often less than people expect. In our example with three debts and $300 extra a month, the snowball cost $236 more interest over about two years, and both finished in the same month. The gap grows when rates are far apart and balances are large.
What matters more than the method?
Paying something extra every month. In the same example, paying only the minimums would take more than six years and about $5,000 more in interest than either method.