Debt Avalanche vs. Debt Snowball: Which Method Wins?
By Jordan Ellis · Published · Reviewed
Quick Answer
The avalanche method (highest interest rate first) always costs the least total interest. The snowball method (smallest balance first) costs slightly more but produces quick wins that keep people motivated — and research shows people who use it are more likely to become debt-free. Choose avalanche for math, snowball for psychology.
How each method works
Both methods share the same engine: pay minimums on everything, then concentrate every spare dollar on one target debt. When it dies, roll its entire payment into the next target. The only difference is targeting:
- Avalanche: target the highest interest rate first.
- Snowball: target the smallest balance first.
A real comparison
Three debts, $500/month total available:
| Debt | Balance | APR | Minimum |
|---|---|---|---|
| Credit card A | $2,000 | 24% | $50 |
| Credit card B | $5,000 | 19% | $100 |
| Personal loan | $8,000 | 9% | $180 |
- Avalanche order: A (24%) → B (19%) → loan (9%). Total interest: about $3,200. Debt-free in ~37 months.
- Snowball order: A ($2k) → B ($5k) → loan ($8k). Total interest: about $3,200. Debt-free in ~37 months.
Same order here — small balance and high rate coincide. Now flip card A’s balance to $8,000 and the loan’s to $2,000: avalanche saves roughly $850 over snowball and finishes about a month sooner. The methods diverge exactly when big balances carry high rates.
What the research says
The math has a clear winner; the behavior research is more interesting. Studies of debtors (notably work by Gal & McShane and related Kellogg research) found that people who closed accounts early — the snowball signature — were significantly more likely to eliminate their total debt. Winning small battles keeps people in the war.
This isn’t irrational. Debt payoff is a 2–5 year project, and willpower is a depletable resource. A paid-off account in month 4 is proof the plan works; the avalanche’s bigger first target might not fall until month 14.
How to choose
- Run both in the debt payoff calculator. It shows the interest difference between methods for your exact debts.
- Difference under a few hundred dollars? Take the snowball — motivation is worth more than the spread.
- Difference large (a 24% card sitting behind a 6% loan)? Take the avalanche, but manufacture wins: track the balance graph, celebrate every $1,000 milestone.
- Hybrid if you like: one or two quick snowball kills, then avalanche for the expensive rest.
The rules that matter more than the method
- Stop adding new charges. No method outruns fresh debt.
- Automate payments above the minimums so the plan doesn’t rely on monthly discipline.
- Keep a $1,000–$2,000 mini emergency fund so surprises don’t go back on the card.
The bottom line
Avalanche wins the spreadsheet; snowball wins more converts. The best method is the one still running in month 18 — and both beat the minimum-payment trap by years and thousands of dollars.
Official sources
Rules and dollar limits change. Confirm current amounts with the official pages below before you act · Last reviewed .
- Loans and lines of credit (Financial Consumer Agency of Canada)
- Understanding debt (Financial Consumer Agency of Canada)