Debt Snowball vs Avalanche: The Real Numbers on $30K in Debt
Side-by-side comparison of debt snowball and avalanche strategies on a realistic $30,000 mixed-debt payoff scenario.
The scenario
Three debts, $700/month total budget available for payoff:
| Debt | Balance | APR | Minimum |
|---|---|---|---|
| Credit card A | $8,500 | 24.9% | $200 |
| Credit card B | $6,200 | 19.9% | $150 |
| Personal loan | $15,300 | 12.5% | $310 |
| Total | $30,000 | — | $660 |
Extra budget above minimums: $40/month.
Avalanche strategy
Pay minimums on all, extra $40 to the highest APR (Credit card A → B → loan).
- Payoff time: ~54 months
- Total interest paid: ~$9,860
Snowball strategy
Pay minimums on all, extra $40 to the smallest balance (Credit card B → A → loan).
- Payoff time: ~56 months
- Total interest paid: ~$10,340
The tradeoff
Avalanche saves ~$480 in interest and clears the debt ~2 months sooner on this scenario. That's real money — but not life-changing.
Snowball clears the first debt in ~14 months. Avalanche clears the first debt in ~19 months. Those extra five months of visible progress are why behavioral studies find snowball users are more likely to finish.
Pick avalanche if the APR gap between your debts is large (>10 percentage points) and you'll stay disciplined for years.
Pick snowball if you have three or more debts, motivation is a known weakness, or your smallest balance is under $2,000 (fast win).
The move that beats both
Neither strategy matters as much as finding more money to throw at it. Doubling the extra payment from 200:
- Avalanche: ~40 months, ~2,700 saved**
- Snowball: ~40 months, ~2,900 saved**
The strategy debate is a rounding error compared to raising your monthly extra payment.
Try it with your numbers
Plug your actual debts into the debt snowball and debt avalanche calculators to see side-by-side timelines for your situation.