Debt Snowball vs Avalanche
Debt Payoff Calculator — Snowball vs Avalanche
What this calculator does
Enter your debts, interest rates, and minimum payments. The calculator runs both the Snowball and Avalanche methods so you can compare total months and interest.
The math, with a worked example
Snowball pays the smallest balance first. Avalanche pays the highest APR first. Both pay minimums on all other debts and apply the extra cash to the target debt. With $3,000 at 18%, $1,200 at 24%, and $100/month extra, Avalanche usually wins on interest saved, while Snowball may win on motivation.
Why this matters
Snowball and avalanche differ by a real dollar amount, not a philosophy: avalanche (highest APR first) always minimizes interest; snowball (smallest balance first) buys quicker wins at a measurable price. The tool prices the gap so you choose it knowingly.
Methodology and transparency
Both plans pay minimums on everything and aim the extra cash at one target debt: smallest balance (snowball) or highest APR (avalanche), rolling each cleared debt's payment forward. The math is exact for fixed APRs and no new charges — the behavioral assumption is the honest variable, because the cheaper plan only wins if you stick to it. Everything runs in your browser; no data is sent or stored.
Last reviewed: 2026-08-08
Common questions
Which is better, Snowball or Avalanche?
Avalanche almost always saves the most interest. Snowball can be better for motivation if you need quick wins.
Do minimum payments stay the same?
The calculator assumes minimum payments stay flat. In reality, minimum payments drop as balances fall, so paying the original minimum accelerates payoff.
Can I add more than three debts?
Yes. Click the Add Debt button to add as many debts as you need.