Debt Snowball vs. Avalanche Calculator
Compare the two most common credit-card payoff strategies side by side, using the same monthly budget. Nothing you enter is stored or transmitted — everything runs in your browser.
Two popular strategies answer this question in different ways. The Debt Snowball pays off the lowest-balance card first for quick motivational wins. The Debt Avalanche pays off the highest-APR card first to minimize total interest. Enter your cards and monthly budget below to see, in your specific situation, which card each method targets first and how the two strategies compare.
Your credit cards
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How the two strategies compare
- Avalanche is estimated to save $214.85 in interest compared to Snowball.
- Snowball pays off the first account 15 months earlier.
- Avalanche is estimated to be debt-free 1 month sooner overall.
These are factual comparisons of this specific simulation. Neither strategy is universally “best” — the right choice depends on how much motivation matters to you versus minimizing interest.
- Total interest paid
- $2,046.79
- Total amount paid
- $8,546.79
- Debt-free date
- Feb 2029
- First card paid off
- Store Card · month 6
- Total interest paid
- $1,831.94
- Total amount paid
- $8,331.94
- Debt-free date
- Jan 2029
- First card paid off
- Rewards Card · month 21
- 1Store CardMonth 6
- 2Travel CardMonth 16
- 3Rewards CardMonth 29
- 1Rewards CardMonth 21
- 2Travel CardMonth 28
- 3Store CardMonth 28
How the Debt Snowball works
The Debt Snowball method attacks debts in order of smallest balance to largest, regardless of APR. You pay the minimum on every card except the smallest, and direct any remaining budget at that one until it’s gone. Then you “snowball” that freed-up payment onto the next-smallest balance.
Why people choose it
- Paying off smaller balances sooner can provide visible progress.
- Simplifies your bill list faster.
- Often pays off the first card sooner than Avalanche.
How the Debt Avalanche works
The Debt Avalanche method attacks debts in order of highest APR to lowest, regardless of balance. You pay the minimum on every card except the one with the highest interest rate, and direct any remaining budget at that one until it’s gone.
Why people choose it
- Under the calculator’s assumptions, prioritizing the highest APR can reduce total interest compared with other payoff orders.
- May appeal to people who prioritize reducing interest costs over getting earlier small-balance payoff milestones.
- Can shorten overall payoff time when APRs differ a lot.
What this calculator does
- Simulates both strategies month by month using the same total budget.
- Applies each non-priority card’s minimum first, then focuses the rest of the budget on the strategy’s priority card.
- Rolls unused budget to the next priority card within the same month when the current priority is paid off early.
- Uses an APR ÷ 12 monthly-rate approximation with cents-safe arithmetic. Real issuers may compute interest differently.
- Never labels a “winner” — instead it reports factual differences you can weigh yourself.
Frequently asked questions
- What is the Debt Snowball method?
- The Debt Snowball method pays off credit cards in order from the smallest balance to the largest balance, while paying the minimum on the rest. The idea is to create early wins that keep people motivated. This calculator uses that same rule.
- What is the Debt Avalanche method?
- The Debt Avalanche method pays off credit cards in order from the highest APR to the lowest APR, while paying the minimum on the rest. Mathematically it usually produces the lowest total interest, though the first payoff can take longer than with Snowball.
- Which method pays off my cards fastest?
- It depends on your specific balances and APRs. This calculator simulates both methods month by month using the same total budget and shows a side-by-side result. In many cases Avalanche pays less interest overall, while Snowball tends to pay off the first card sooner.
- How is my monthly budget used?
- Your Total Monthly Debt Payment Budget already includes all of your minimum payments. Each month, the calculator applies each non-priority card’s minimum, then directs the rest of the budget to the strategy’s priority card. If the priority card is fully paid off in a month with unused budget left over, that leftover cascades to the next priority card during the same month.
- What happens if my budget is below my total minimum payments?
- The calculator will show a validation notice and will not run the simulation. In real life, missing minimum payments can trigger late fees and be reported to credit bureaus. Add more to your budget or reduce non-essential spending before running the comparison.
- Why can real-world results differ?
- This calculator uses a monthly APR/12 approximation and rounds interest to whole cents each month. Real issuers may use average daily balance, daily compounding, or slightly different rounding, so your statement balance may differ from these educational estimates.
Use the other calculators to explore payoff timelines, minimum-payment behavior, and balance transfers.