Debt Snowball vs Avalanche Calculator
List up to four debts and your total monthly budget. The calculator runs both strategies — snowball (smallest balance first) and avalanche (highest rate first) — and shows exactly what each costs you.
Enter up to 4 debts. Leave a row's balance at 0 to skip it.
| Snowball | Avalanche | |
|---|---|---|
| Debt-free in | — | — |
| Total interest | — | — |
Snowball vs avalanche: the real difference
Both methods pay minimums on every debt, then throw every spare dollar at one target debt until it dies, then roll that payment into the next target.
- Snowball: target the smallest balance first. Fast early wins keep you motivated.
- Avalanche: target the highest interest rate first. Mathematically optimal — always the least total interest.
Which should you choose?
Run your own numbers above. When the difference is small (it often is), behavior beats math: studies of debt repayment consistently find people who see quick wins are more likely to finish. When a high-rate card dominates your debt, avalanche can save hundreds or thousands — the calculator tells you exactly how much your motivation would cost.
Make either method work
- Fix your total monthly debt budget and never reduce it as debts fall — the "rolled over" payments are the whole engine.
- Stop adding new debt; a card that keeps growing can't be snowballed.
- Put windfalls (tax refund, bonus) on the current target debt.
Frequently asked questions
Which is better, debt snowball or avalanche?
Avalanche (highest rate first) always costs the least in total interest. Snowball (smallest balance first) gives faster early wins that help many people stay on track. Compare both above — if the dollar difference is small, choose whichever you will actually stick with.
How does the rollover work?
When a debt is paid off, the money you were paying on it gets added to the payment on the next target debt. Your total monthly outlay stays the same, but it concentrates on fewer debts over time.
Should I save or pay off debt first?
A common approach: build a small starter emergency fund ($1,000 or so) first so surprises do not become new debt, then attack debts, then build a full 3–6 month fund.
Does this include loan fees or penalties?
No — it models balances, APRs, and payments only. Late fees or prepayment penalties (rare in the US) would change results slightly.
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Last updated: 2026-07-07