When I had three credit cards and a car loan staring me down, I did what everyone does — I googled "best way to pay off debt." Two methods kept coming up: avalanche (highest interest first) and snowball (smallest balance first). One is mathematically perfect. The other is psychologically brilliant.
I ran the numbers on my own debts using both methods. Here's what I found.
Three debts, $300 extra per month to throw at them:
| Debt | Balance | APR | Min Payment |
|---|---|---|---|
| Credit Card A | $5,000 | 22.99% | $150 |
| Credit Card B | $3,000 | 18.99% | $90 |
| Car Loan | $8,000 | 5.99% | $250 |
| Avalanche | Snowball | |
|---|---|---|
| Debt-free date | Month 28 | Month 29 |
| Total interest | $2,847 | $3,156 |
| First win (debt paid off) | Month 10 | Month 7 |
Avalanche saved me $309 and one month. Not life-changing money, but real money. If my highest-rate card had been $15,000 at 24.99%, the gap would've been over $2,000.
High-interest debt is a vampire. That $5,000 card at 23% APR bleeds about $96 in interest every single month. The car loan at 6%? Only $40. By killing the high-rate debt first, you stop the bleeding fastest.
It's pure math. No feelings involved.
Here's the thing about math: it doesn't care about your motivation.
With snowball, I paid off Credit Card B ($3,000) in just 7 months. Seven months! I got to cross something off my list. That dopamine hit is real. Research actually backs this up — people using snowball are more likely to stick with their plan because they see progress faster.
And sticking with the plan matters way more than saving $300. If you quit after 6 months because you feel like you're getting nowhere, avalanche's math advantage means nothing.
Go avalanche if:
Go snowball if:
Or split the difference. Snowball the first 1-2 small debts for the psychological win, then switch to avalanche for the rest. Best of both worlds.
Plug in your real debts and see which method wins for your situation.
Compare Your Strategies →Absolutely. Start with snowball for the quick wins, then switch to avalanche once you have momentum. The math doesn't care when you switch.
Yes. Build $1,000-2,000 first, then attack high-interest debt. Without a small cushion, every flat tire goes back on the credit card and undoes your progress.
If you can consolidate multiple high-interest cards into a single loan at 8-12%, that often beats both methods. You simplify payments and cut total interest. The key is not running up new balances.