Compare Avalanche vs Snowball and find your fastest, cheapest path to debt-free
💡 Why This Matters Multiple debts, one budget — the order you pay them off in changes how much interest you'll pay and how fast you're debt-free. This tool runs the real month-by-month math for both popular payoff strategies so you can pick the one that fits you.
The "Avalanche" and "Snowball" names come from personal finance writer Dave Ramsey and others in the 2000s — Snowball because paying off small debts first builds momentum "like a snowball rolling downhill," even though the math slightly favors Avalanche.
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Each month, interest accrues on every debt's remaining balance, then minimum payments are applied to all debts, and any leftover budget ("extra") is directed at one target debt. The Avalanche method always sends extra money to whichever remaining debt has the highest interest rate. The Snowball method always sends it to whichever remaining debt has the smallest balance. This repeats month by month until every balance hits zero.
Your result shows how many months it will take to be completely debt-free under your chosen strategy, plus the total interest you'll pay along the way. Because Avalanche targets your most expensive debt first, it typically results in less total interest paid — even though the two methods often finish within a month or two of each other.
This calculator assumes a fixed monthly budget and fixed APRs — it doesn't account for rate changes, added purchases, promotional 0% periods expiring, or missed payments. It's a planning tool, not a guarantee, and real-world results will shift if your budget or rates change.
If the interest difference between methods is small for your situation, many people choose Snowball anyway for the psychological win of closing out a debt quickly. If the gap is large, Avalanche is worth the extra discipline. Either way, the biggest lever you control is your monthly budget — even $50 more a month can meaningfully cut your payoff timeline.
Example: Say you have a $5,000 balance at 22% APR (min $100/mo) and a $3,000 balance at 18% APR (min $75/mo), with a $600 total monthly budget. Under Avalanche, the extra $425/month goes to the 22% card first. That combination pays off both debts in 17 months and costs about $1,148 in total interest — compare that to only paying minimums, which would take years longer and cost far more.
Avalanche almost always saves more in total interest, since it pays off your highest-interest-rate debt first. Snowball can finish individual debts faster, which some people find more motivating even though it usually costs a bit more overall.
No — the calculator automatically reorders your debts based on the method you pick. Avalanche always targets the highest APR first regardless of the order you entered them, and Snowball always targets the smallest balance first.
The calculator will flag this instead of giving you a misleading payoff date. If your monthly budget is less than the sum of your minimum payments, you'll need to either increase your budget or contact your lenders about a modified repayment plan.