Does the debt avalanche method save the most interest?

Usually yes. Avalanche targets the highest APR first, so it typically reduces total interest more efficiently than snowball when the same payment budget is used.

Why use a debt avalanche calculator?

It shows the rollover math, payoff timeline, total interest, and debt-free date automatically — and side-by-side against snowball — so the tradeoff is visible without modeling it by hand.

Why would someone still choose snowball instead of avalanche?

Because the cheapest plan is not always the easiest one to stick with. Some people need quicker wins from smaller balances disappearing earlier, even if the total interest is a little higher.

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Debt avalanche calculator

Pay the priciest debt first.

Avalanche is the math-first payoff strategy: send every spare dollar at your highest-APR debt until it's gone, then roll that payment into the next most expensive balance. Lowest total interest, every time the math is consistent.

Drag the sliders to model your real plan. The dashboard shows payoff time, total interest, and debt-free date — side-by-side against snowball, so you can see exactly what avalanche costs (or saves) on your numbers.

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How to use it

Enter your debts. Balance, APR, and minimum payment from each statement. The highest-APR debt gets a "1st" tag — that's what avalanche pays first.
Set your extra monthly payment. Slide the bar to whatever feels realistic on top of your minimums. The whole plan recalculates live.
Read the verdict. The avalanche card sits next to snowball, with stars marking the winner on cost and speed. The callout below says — in plain English — whether avalanche is worth the wait on your numbers.
Export the schedule. CSV, Excel, or PDF. Includes payment dates, which debt to pay first each month, principal, interest, and remaining balances.

Methodology

Each month the engine applies interest to every balance, covers the minimum payment on each debt, then sends any remaining budget — your extra payment plus rolled-over payments from debts already paid off — to the debt with the highest APR. When that balance hits zero, the full payment rolls into the next-highest-rate debt.

That's avalanche: ruthless about cost, indifferent to feelings. It should never cost more interest than snowball in a consistent model. The catch is behavioral — if your priciest debt is also your largest, you may not see a balance hit zero for a year or more.

FAQ

Does avalanche always beat snowball?

On total interest, in a consistent model — yes. Payoff timing can tie, and odd inputs (like the highest-APR debt also being the smallest) can flatten the difference. The dashboard shows you both at once so it's never a guess.

Why not always choose avalanche?

Because the cheapest plan is not always the one a real person can stick with month after month. Behavior matters. If you'd quit avalanche by month four and stick with snowball for two years, snowball wins on the only metric that matters: paying it off.

What's the "1st" tag on a debt?

That's the highest-APR debt currently in your stack — the one avalanche will throw your extra payment at first. It updates as you edit, so you can see what the strategy is actually doing.

Disclaimer

These results are modeled estimates based on the assumptions shown here. They are useful for comparison and planning, not personal financial advice.