9 min read · updated October 21, 2026
Debt snowball vs avalanche: which one pays off faster?
Both methods worked out month by month on two lists of debts. When the gap is $66, when it is $1,521, and a simple rule for the lists in between.
You have more than one debt and some extra money each month. Where should the extra go first?
- Debt snowball: to the smallest balance first.
- Debt avalanche: to the highest interest rate first.
"Faster" can mean two things here. The snowball is faster to your first paid-off debt. The avalanche is as fast or faster to zero, and it costs less interest. Both are true. What most guides skip is the size of the gap. For one list of debts below, the snowball costs $66 more. For another, it costs $1,521 more. This guide shows both, month by month, and what makes the difference.
Why the order matters more in 2026
- Card rates are high. In August 2026, the average rate on credit card accounts that paid interest was 22.36% a year (Federal Reserve G.19, October 7, 2026).
- Balances are big. US credit card balances were $1.26 trillion in the second quarter of 2026, up $21 billion in three months (New York Fed, August 11, 2026). The average card holder with a balance owed $6,610 (TransUnion Q2 2026 report, via Finviz).
At that rate, every $1,000 that sits on a card costs about $19 a month. So the order you pick can be worth real money. Or almost nothing. It depends on your list.
What the research says about small wins
The snowball is not only a feeling. Two studies back it up:
- Researchers at Northwestern's Kellogg School looked at almost 6,000 people in a debt program. People who closed more accounts were more likely to finish, even when they had paid the same share of dollars (Gal and McShane, Journal of Marketing Research, 2012, via Kellogg Insight).
- A University of Alberta team found that people who put their extra money on one account at a time paid down card debt 15% faster than people who spread it over every card. Their tip: start with the smallest card (Kettle, Trudel, Blanchard and Häubl, Journal of Consumer Research, via the University of Alberta).
So the real trade is simple. The snowball buys you an early win. The avalanche saves interest. The question is the price of that win.
How we did the math
Both examples use the same rules as our Debt Payoff Planner:
- Each month, interest is the balance times the yearly rate, divided by 12.
- Every debt gets its minimum payment. The minimum stays the same each month.
- The extra money goes to one target debt. When a debt is paid off, its minimum joins the extra money.
Banks count interest by the day, so a real bill will be a few dollars off. The gap between the two orders is what we want to see.
Example A: three cards with close rates
Example numbers. Three credit cards, $11,100 in all. Minimums add up to $285. Extra money: $200 a month, so $485 goes to debt each month.
| Debt | Balance | Rate | Minimum |
|---|---|---|---|
| Store card | $1,200 | 21.9% | $40 |
| Visa | $3,800 | 24.9% | $95 |
| Mastercard | $6,100 | 23.4% | $150 |
| Snowball | Avalanche | |
|---|---|---|
| Order | Store card, Visa, Mastercard | Visa, Mastercard, Store card |
| First debt gone | Month 6 | Month 16 |
| Debt free | Month 31 | Month 31 |
| Total interest | $3,830 | $3,764 |
The snowball costs $66 more. That is about $2 a month. In return, the first card is gone 10 months sooner, and two of the three are gone by month 19. Both plans end in the same month.
Why so small? The three rates are within 3 points of each other. Whichever card you pay first, each extra dollar saves about the same interest.
Example B: a 0% plan, a car loan and a 27% card
Example numbers. $20,800 in all. Minimums add up to $630. Extra money: $200 a month, so $830 goes to debt each month.
| Debt | Balance | Rate | Minimum |
|---|---|---|---|
| Dentist payment plan | $1,900 | 0% | $80 |
| Car loan | $7,400 | 7.5% | $260 |
| Credit card | $11,500 | 27.24% | $290 |
| Snowball | Avalanche | |
|---|---|---|
| Order | Dentist plan, car loan, card | Card, car loan, dentist plan |
| First debt gone | Month 7 | Month 24 |
| Debt free | Month 34 | Month 33 |
| Total interest | $7,320 | $5,798 |
The snowball costs $1,521 more and takes one month longer. Spread over the plan, that is about $46 a month: close to a quarter of the $200 extra.
Here the smallest debt is also the cheapest. It costs nothing to carry. Every extra dollar sent to it is a dollar not sent to a card that charges 27%. Also look at the avalanche column: the dentist plan is still gone by month 24, paid off by its own $80 minimum. A 0% debt often clears itself if you just keep paying the minimum.
Example B, month by month
Same debts, same $830 a month. This is what you still owe at the end of each month, and how many debts are left (snowball / avalanche):
| Month | Snowball owes | Avalanche owes | Debts left |
|---|---|---|---|
| 6 | $17,633 | $17,563 | 3 / 3 |
| 12 | $14,371 | $14,067 | 2 / 3 |
| 18 | $10,964 | $10,280 | 2 / 3 |
| 24 | $7,271 | $6,165 | 1 / 2 |
| 30 | $3,048 | $1,649 | 1 / 2 |
| 33 | $714 | $0 | 1 / 0 |
| 34 | $0 | $0 | 0 / 0 |
The gap starts small and grows. At month 6 it is $70. At month 12 it is $304. By month 24 it is over $1,100. That is the card at 27.24%. With the snowball, you still owe over $10,800 on it at month 18, while the extra money goes to the dentist plan and the car loan.
Interest paid so far tells the same story: $3,531 vs $3,227 at month 12, and $6,391 vs $5,285 at month 24.
What the snowball gives you for that money: by month 12 you have 2 debts left, not 3. By month 19 you have 1 left. With the avalanche, you still have all 3 until month 24.
What makes the gap big or small
The same two lists, with less and more extra money:
| Extra money each month | Gap in Example A | Gap in Example B |
|---|---|---|
| $50 | $99 | $716 |
| $200 | $66 | $1,521 |
| $500 | $34 | $1,620 |
Three things drive the gap:
- How far apart the rates are. Close rates (Example A) mean a small gap at any payment. A cheap small debt next to an expensive big one (Example B) means a big gap.
- How big the expensive debt is. In Example B, $11,500 sits at 27% while you pay off the small ones.
- How long the snowball keeps the expensive debt waiting. In Example A, more extra money shrinks the gap. In Example B, it does not, because the card still waits behind two cheaper debts.
A rule of thumb for the lists in between
Most lists are not as clear as A or B. Here is a simple rule we use:
Start with the smallest debt if either one is true:
- its rate is within 5 points of your highest rate, or
- your extra money, plus its own minimum, clears it in 3 months or less.
Otherwise, start with the highest rate. After the first debt is gone, go by highest rate.
In Example A, the store card is 3 points from the top rate, so the rule says start small: $66 more, first win in month 6. In Example B, the dentist plan is 27 points lower and needs 7 months, so the rule says start with the card: no extra cost.
We also tested the rule on 2,000 made-up lists of 3 to 5 debts (cards, loans and 0% plans, with $50 to $500 extra a month). These are not real people, just a stress test:
- Pure snowball: a median of $320 more than the avalanche. 1 list in 10 cost over $1,000 more.
- The rule: in 9 lists out of 10, less than $160 more. The worst list cost $685 more.
- First debt gone (median): month 8 with the snowball, month 15 with the rule, month 18 with the avalanche.
The rule is not perfect. It gives up some of the snowball's speed to avoid its rare big bills.
What matters more than the order
- The extra money. In Example A, with no extra (just the minimums, rolled over), the cards take 76 months and $10,414 in interest. With $200 extra, it is 31 months and under $3,900. Any extra beats the best order.
- Never miss a minimum. Both methods pay every minimum, every month. A late fee or a missed payment can cost more than the whole gap.
- Stop adding new debt. A plan only works on a list that is getting shorter.
- Know when a 0% plan ends. Write down the end date. If the rate jumps later, the order may change.
Common questions
Can I switch from one method to the other? Yes. The order is just where your extra money goes this month. You can change it any time. Many people start small for a quick win, then go by rate.
What if two debts have the same rate? Pay the smaller one first. It costs the same and you get the win sooner.
What if my smallest debt also has the highest rate? Then there is no choice to make. Both methods start with the same debt.
Is the avalanche always the cheapest order? With the rules above, yes. We tried every possible order on our 2,000 test lists, and none cost less. Fees, a 0% period that ends, or a rate that changes can shift that. Check your own numbers.
Do it in a sheet
Want to try your own debts first? Our free debt snowball vs avalanche calculator runs both orders on up to 5 debts, with the same rules as this guide, and shows the gap in one sentence. Nothing is saved or sent.
The Debt Payoff Planner does this math for your own debts. Type each balance, rate and minimum once. Pick Snowball or Avalanche and see the debt free month, the interest and what to pay on each debt this month.
To find your extra money first, our free 50/30/20 budget calculator shows how your pay splits between needs, wants and savings. Extra debt payments come out of the savings part. The 50/30/20 guide shows what to do when needs leave little room. To plan every bill and payday in one place, use the Monthly Budget Planner.
Example numbers. This guide is not tax, legal, accounting or financial advice.