Debt Payoff Calculator
List your debts, add anything extra you can pay each month, and pick a strategy — snowball (smallest balance first) or avalanche (highest interest rate first). You'll see your debt-free date, total interest paid, and the order to attack each debt.
- Debt-free in
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- Debt-free date
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- Total interest paid
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Snowball vs avalanche — which is faster?
Avalanche (highest APR first) always saves the most interest and is mathematically fastest, because every extra dollar attacks the most expensive debt. Snowball (smallest balance first) usually costs a little more in interest but delivers quick wins — closing that first small account builds the momentum that keeps people going. Toggle between the two above to see the exact difference for your debts; if the gap is small, pick the one you'll stick with.
How to use this calculator
Enter each debt's current balance, APR, and minimum monthly payment, then the extra amount you can put toward debt each month. The simulation pays every minimum, sends the extra to the first debt in your chosen order, and — whenever a debt is paid off — rolls its freed-up minimum into the next one. That rollover is the "snowball" effect, and it applies to both methods. Pair it with a monthly budget (our 50/30/20 calculator is a quick start) to find how much extra you can realistically commit.
Know your payoff date? Make it real.
Zowda's AI assistant builds you a debt-focused budget and helps you stick to the extra payment every month — the hard part the math can't do.
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