Debt Snowball vs. Avalanche: Which Method Should You Choose to Get Out of Debt?
Introduction
Anyone juggling several debts at once—a credit card, a personal loan, an overdraft line, money owed to a relative—often feels stuck on a treadmill. You make payments every month, yet the balances drop so slowly that nothing seems to change. And when extra money is tight, a crucial question arises: which debt should get whatever extra cash I have?
There are two classic answers. The avalanche method says: attack the one with the highest interest rate, because it costs you the most. The snowball method says: attack the one with the smallest balance, because it disappears the fastest. Both work. The difference between them is smaller than it appears, and choosing well depends more on your temperament than on math.
The best method for getting out of debt is the one you will still be following in month fourteen, when nobody is cheering you on anymore.
Before You Choose: Make the Full List
Neither method works without a clear picture. Write down every debt on a single sheet of paper with four details:
- Who you owe.
- Total remaining balance.
- Minimum monthly payment.
- Effective annual interest rate (APR).
Next, calculate the total amount you can afford to put toward debt each month. That number, minus the sum of all minimum payments, is your attack money. Both methods share the exact same foundation: pay the minimum on every debt and concentrate all your attack money on a single target.
The Avalanche Method
You list your debts from highest interest rate to lowest and focus all extra money on the first one. Once that debt is paid off, everything you were putting toward it—its minimum payment plus the extra amount—rolls into the next highest-rate debt.
Advantage: It pays the least total interest. Mathematically, there is no more efficient order.
Disadvantage: If your most expensive debt is also your largest, many months can pass before you cross the first one off the list. And months without visible progress are the exact reason people give up.
The Snowball Method
Popularized by Dave Ramsey, this method orders debts from smallest balance to largest, regardless of interest rate. You attack the smallest one, wipe it out quickly, and roll its payment into the next one. Like a snowball rolling downhill, your attack payment grows larger with every debt you eliminate.
Advantage: It delivers early wins. Watching a balance hit zero in a matter of weeks creates a sense of momentum that sustains the effort.
Disadvantage: You pay more in interest—sometimes significantly more if the small debt carries a low rate and the large debt carries a very high one.
A Worked Example With Numbers
Suppose you have three debts and $400 a month to put toward them:
- Debt A: $600 at 15% APR, $25 minimum payment.
- Debt B: $2,500 at 32% APR, $75 minimum payment.
- Debt C: $4,000 at 22% APR, $120 minimum payment.
With the snowball method, you attack Debt A first. It is paid off in month 4, Debt B in month 14, and Debt C in month 23. Total interest paid: roughly $1,800.
With the avalanche method, you attack Debt B first, the most expensive one. Your first debt isn't closed until month 12, and everything is paid off in month 22. Total interest paid: roughly $1,690.
The avalanche saves about $115 and finishes one month sooner. The snowball delivers your first victory eight months earlier. Neither difference is trivial, and neither is massive.
What Research Says
In 2011, a team including Dan Ariely published a series of experiments in the Journal of Marketing Research showing that when people allocated payments across multiple simulated debts, they tended to pay off small balances first even when it cost them more money. The researchers called this "debt account aversion" and interpreted it as a cognitive bias that makes getting out of debt more expensive.
However, subsequent studies using real-world data nuanced that conclusion. In 2012, David Gal and Blakeley McShane analyzed thousands of cases from a debt settlement program and found that closing individual accounts completely predicted a higher likelihood of paying off all debt, regardless of the dollar amount paid. In 2016, Keri Kettle and her colleagues showed that concentrating repayments on a single debt rather than spreading them out increased motivation and the sense of progress.
The reasonable takeaway is that the avalanche wins on the spreadsheet while the snowball often wins in human behavior. For someone who is already naturally consistent, the avalanche is better. For someone who has tried to get out of debt before and quit, an early win may be worth far more than the interest saved.
A Middle Path
You don't have to be a purist. Several hybrid approaches combine the best of both:
- Start with a snowball, then switch to an avalanche. Knock out one or two small debts to build momentum, then order the rest by interest rate.
- Avalanche with an exception. If you have a tiny debt that can be wiped out in a month or two, clear it first even if it isn't the most expensive.
- Prioritize high-risk debts. Debts backed by collateral (your car or home) or carrying severe legal consequences deserve special priority regardless of the order you choose.
How to Speed Up Either Method
- Sell what you don't use and put every dollar toward the target debt.
- Take on temporary extra income, with a clear end date, directed entirely toward debt payoff.
- Renegotiate interest rates. Call your bank and ask for a lower rate or a cheaper consolidation loan. A word of caution: consolidation only helps if you stop using the credit cards you just freed up.
- Freeze credit card use while paying down balances. Paying off debt with one hand while adding to it with the other is the most common reason people stay stuck.
Common Mistakes
Spreading extra money across all debts. It dilutes your progress and erases the feeling of momentum.
Skipping minimum payments on the other debts. That triggers late fees, penalty rates, and credit score damage.
Having zero cash buffer. Without a small starter emergency fund, the very first flat tire goes right back onto the credit card.
Consolidating and continuing to swipe the cards. You end up with the new loan plus the old balances all over again.
Switching methods every month. Any consistent order beats indecision.
When to Ask for Help
If the sum of your minimum payments exceeds what you can afford to pay, no payoff order will solve the problem. In that case, seek qualified help: many countries offer formal consumer debt restructuring procedures—often free—as well as non-profit credit counseling agencies that provide guidance at no cost.
Conclusion
The snowball and avalanche methods share what matters most: pay all minimums, concentrate every extra dollar on a single debt, and stop taking on new debt. The difference between the two is usually a few months and a few hundred dollars; the difference between following either one and following neither is measured in years. Today, list your debts with their balance, minimum payment, and interest rate, calculate your attack money, and pick the first debt you are going to target this month.
References
- Amar, M., Ariely, D., Ayal, S., Cryder, C. E., & Rick, S. I. (2011). Winning the battle but losing the war: The psychology of debt management. Journal of Marketing Research, 48(SPL), S38-S50.
- Gal, D., & McShane, B. B. (2012). Can small victories help win the war? Evidence from consumer debt management. Journal of Marketing Research, 49(4), 487-501.
- Kettle, K. L., Trudel, R., Blouin, S. J., & Häubl, G. (2016). Repayment concentration and consumer motivation to get out of debt. Journal of Consumer Research, 43(3), 460-477.
- Ramsey, D. (2003). The Total Money Makeover. Thomas Nelson.