comparison · 8 min read
Debt snowball or avalanche? Avalanche saves more interest, but snowball may keep you going
Two ways to order your debt payments, run on one 3-debt example, plus what research on real borrowers says about who finishes.
By ThriveBrook editors · Updated October 2026
Banks charged an average of 22.15% a year on credit card accounts that paid interest in the second quarter of 2026, according to the Federal Reserve’s consumer credit release of September 8. At that rate, the order you pay your debts in has a price. The two best-known orders are the avalanche, which goes after the highest interest rate first, and the snowball, which goes after the smallest balance first.
Both start with the same page. Write down every debt you owe, and beside each one put its balance, its interest rate and its minimum payment. Your statements carry all three. Federal rules also require every card statement to print a minimum payment warning with an estimate of how long the balance would take to clear on minimums alone. Copy that estimate onto the page too.
The avalanche: highest rate first
With the avalanche, you pay the minimum on every debt and send every spare dollar to the one with the highest interest rate. When that debt is gone, its whole payment rolls onto the next-highest rate, and so on down the list.
On paper, no order beats it. Each extra dollar cancels interest at the steepest rate you’re paying, so for the same monthly budget the avalanche always costs the least interest. In a 2011 paper in the Journal of Marketing Research, Moty Amar and four co-authors called this the normative answer, meaning the one a perfectly rational borrower would choose.
The catch is time. If your highest-rate debt is also your largest, you can pay on it for years before a single account closes. Circle the highest rate on your page. That debt is your avalanche target.
The snowball: smallest balance first
The snowball uses the same minimums and the same rolling payment, but it sorts the list by balance and ignores the rate. The smallest debt often disappears within months. With each payoff, that debt’s old payment joins the money aimed at the next one. The payment grows as it rolls, like a snowball heading downhill.
Plenty of people lean this way on their own. In four experiments built around a debt-repayment game, the 2011 study found that participants kept paying off small debts first, even when the larger ones carried higher rates. The authors named the habit debt account aversion, a pull toward having fewer open accounts that can outweigh the interest bill.
If your extra money could clear your smallest balance in three or four months, the snowball’s first win is close.
Three debts, two orders
To see what the choice costs, take three debts:
- a $2,000 personal loan at 9%, with a $65 minimum
- a $4,500 credit card at 22%, with a $110 minimum
- a $9,000 credit card at 27%, with a $225 minimum
That’s $15,500 in all, and the minimums add up to $400. Put $600 a month toward the three, which leaves $200 extra to aim at one target, and hold every minimum flat. Real card minimums shrink as balances fall, so your own numbers will differ a little.
| Order and monthly payment | First debt paid off | Debt-free | Total interest |
|---|---|---|---|
| Snowball, $600 | Month 8 | Month 38 | $7,141 |
| Avalanche, $600 | Month 30 | Month 36 | $6,055 |
| Snowball, $800 | Month 5 | Month 26 | $4,683 |
| Avalanche, $800 | Month 18 | Month 25 | $3,867 |
Example: the three debts above, paid in each order at two monthly amounts, with interest charged monthly.
At $600 a month, the snowball pays $7,141 in interest and the avalanche pays $6,055, a difference of $1,086.
Spread over three years, that’s about $30 a month. The avalanche is also done in month 36, two months before the snowball’s month 38.
How close the balances run
Chart the total balance month by month and the two plans look almost alike. At month 24, the snowball plan still owes $7,021 and the avalanche plan owes $6,392, a gap of $629.
If you tracked only the total, you’d barely notice which plan you were on. Add up your own balances on the same day each month to watch the line fall under either method.
When each account closes
The plans split on the day each account hits zero. The snowball closes the loan in month 8 and the 22% card in month 21, then spends the rest of its run on the big card. Its target payment grows from $265 to $375 and then to the full $600 as each account closes.
The avalanche closes nothing until month 30, when the 27% card is finally gone, 22 months after the snowball’s first payoff. The other two follow together in month 36.
Two and a half years of payments with no account closed is the real cost of the avalanche, and it’s a long time to stay motivated. If your own highest-rate debt would take more than a year to clear, expect the same long wait.
What borrower studies found
Studies of people paying off real debts lean toward the snowball. In a 2012 study in the Journal of Marketing Research, Northwestern University researchers David Gal and Blakeley McShane worked with records from a debt settlement firm. Clients who closed out individual accounts were more likely to wipe out their debt in the end, whatever the dollar size of the accounts they closed.
That study tracked one firm’s clients and could show a link, not cause and effect.
A 2016 study in the Journal of Consumer Research went further. Remi Trudel of Boston University, one of its four authors, summarized it in Harvard Business Review that December. The team followed nearly 6,000 clients of a financial guidance company for 36 months. People who concentrated payments on one card paid down more of their card debt than people who spread payments evenly.
In a lab experiment, participants told to clear one account at a time worked harder at the word game that earned their repayments and paid off their debt 15% faster.
Their sense of progress came from the share of a balance they wiped out, which is why the smallest account gave the biggest boost. In the article, Trudel attaches one condition to that advice.
To the extent that a consumer’s debt accounts have similar interest rates, he or she should concentrate repayments first on the cards or accounts with the smallest debts, paying off those first.
The wider the gap between your highest and lowest rates, the more the snowball costs you.
A bigger payment beats either order
The size of the monthly payment moves the result far more than the order does. Raise the example to $800 a month and the avalanche finishes in month 25 with $3,867 in interest. The snowball finishes in month 26 with $4,683.
That extra $200 saves $2,188 in interest under the avalanche, about twice what switching orders saved at $600. The first payoff also comes sooner, in month 5 for the snowball and month 18 for the avalanche.
Before you lock in an order, look for the next $50 you could add to the monthly payment.
Which order fits you
The avalanche makes the most sense when one debt’s rate towers over the rest, like a 27% card next to a 9% loan, and you’ve kept a payoff plan going for a year or more before. It also costs you nothing in motivation when your highest-rate debt happens to be your smallest, since both methods then point to the same first target.
The snowball fits when your rates sit close together. In a variation of the example where the three rates are 21%, 22% and 23%, the snowball costs $157 more than the avalanche over the same 36 months. It also fits anyone who has started paying down debt before and stalled.
When the choice is a toss-up, the snowball’s early wins tend to matter more. In a case like the example, its extra interest is real money, but a plan you finish beats a cheaper plan you drop in year two.
When the payments don’t fit
Both methods assume you can cover every minimum and still have something left over. If the minimums alone are more than you can pay, the order of payments won’t fix that.
A nonprofit credit counselor can review your budget and debts with you and, if it fits, set up a debt management plan. The Consumer Financial Protection Bureau notes that most credit counseling organizations are nonprofits, but counselors may still charge fees for some services. It adds that a reputable one should be willing to send you free information about its services without asking for details about your situation.
The Justice Department’s U.S. Trustee Program keeps a state-by-state list of agencies it has approved for the counseling required before a bankruptcy filing. It’s a useful place to find a nonprofit counselor even when bankruptcy isn’t on your mind. Ask any agency for its fees in writing before you agree to a plan.
Pick your order tonight
Go back to your page and check two things, the gap between your highest and lowest rates and the size of your smallest balance. If the rates sit within a few points of each other, or you’ve quit a payoff plan before, sort the list by balance and send this month’s extra money to the top line. If one rate stands far above the rest and you can wait a couple of years for the first payoff, sort by rate and send the extra there instead, then set that payment to repeat every month.