Debt Payoff Calculator: Snowball vs. Avalanche

Q: What is the debt snowball method?

Pay minimums on everything, then throw all extra money at the smallest balance first. When it's gone, roll its payment into the next smallest. It maximizes quick wins and motivation, though it usually costs somewhat more interest than the avalanche.

Q: What is the debt avalanche method?

Pay minimums on everything, then send all extra money to the highest interest rate first. It is mathematically optimal — lowest total interest and usually the fastest payoff — but early wins can be slower if your biggest-rate debt is also your biggest balance.

Q: Which is better, snowball or avalanche?

Avalanche always wins on math; snowball often wins on behavior. The interest difference is frequently modest — run both here and see. The best method is whichever one you'll actually stick with.

List your debts, set your total monthly budget, and see both strategies side by side — payoff date, total interest, and which debt to attack first.

Debt	Balance	APR %	Min. payment
Debt 1
Debt 2
Debt 3
Debt 4
Debt 5

Total monthly debt budget

Must cover all minimum payments

Check inputs: your budget must be at least the sum of minimum payments, and each minimum must beat that debt's monthly interest.

Recommended first target

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Avalanche: debt-free in

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Avalanche: total interest

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Snowball: debt-free in

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Snowball: total interest

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Avalanche saves

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How the two methods work

Both use the same engine: pay every minimum, then direct all remaining budget at one "target" debt. When the target dies, its entire payment rolls into the next target — the payment "snowballs." The only difference is the targeting order:

Snowball: smallest balance → largest balance
Avalanche: highest APR → lowest APR

Worked example (defaults above)

Card A $4,500 @ 24% · Loan $12,000 @ 7% · Card B $1,200 @ 18% · Budget $600/mo

Avalanche attacks Card A (24%) first — lowest total interest. Snowball attacks Card B ($1,200) first — first win in about 4 months. Both finish within a few months of each other; avalanche saves a few hundred dollars in interest.

Choosing your method (honestly)

The avalanche is mathematically superior — but studies of real payoff behavior consistently find that people who see quick wins stay the course. If motivation is your risk, snowball. If discipline isn't the issue, avalanche. Either way, the single biggest lever is the budget number: adding $100/mo shortens the timeline far more than the choice of method. Free that money by consolidating your highest-rate cards (check the math here) or attacking one card at a time with the credit card payoff calculator. Full comparison in our guide: Snowball vs. Avalanche.

Frequently asked questions

What is the debt snowball method?

Smallest balance first, rolling each finished payment into the next. Maximizes early wins and motivation.

What is the debt avalanche method?

Highest APR first. Mathematically optimal — lowest total interest, usually fastest finish.

Which is better, snowball or avalanche?

Avalanche on math, snowball on behavior; the gap is often small. Pick the one you'll stick with.

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Note: Month-by-month simulation with monthly compounding; issuer daily compounding differs slightly. Not financial advice. Last reviewed: July 2026.