Debt snowball / avalanche
Estimate debt payoff time and interest using the snowball or avalanche strategy.
Debt 1
Debt 2 (optional)
Debt 3 (optional)
Results
These are estimates based on your inputs.
Debt-free in
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Total interest
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Total repaid
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What this calculator does
This calculator estimates payoff time and interest for snowball and avalanche debt strategies.
How the formula works
Interest is added monthly on each debt. Minimum payments are made first, then extra payment is directed to the priority debt (lowest balance for snowball, highest APR for avalanche).
Common mistakes
- Setting minimum payments too low to cover interest.
- Ignoring fees or promotional rates that expire.
- Forgetting to keep emergency savings while repaying debt.