Avalanche vs Snowball: Which Debt Payoff Method Saves More?
Both methods pay every minimum and throw all remaining money at one target debt at a time — they differ only in which debt is the target. Avalanche picks the highest rate; snowball picks the smallest balance. Everything else is identical, so the difference in results is pure strategy.
Enter your debts (up to 4 here) and your total monthly budget. The tool simulates both methods month by month and reports months-to-clear and total interest for each.
What the math says
Avalanche is almost always cheaper in total interest, because it kills the highest-rate balance first — the balance costing you the most every single month. Snowball's extra interest is the price of attacking the wrong target.
But the gap is usually smaller than people expect, and it shrinks when the high-rate debts and the small-balance debts are the same debts. If your smallest balance is also your highest APR, the two methods do nearly the same work.
What the math does not say
Snowball's real product is not dollars, it is momentum. Clearing a debt in month 3 (instead of month 20) is visible progress, and visible progress is what keeps most people paying. The method that gets abandoned is worth more than the method that wins on paper.
If you have already tried and quit on a payoff plan, snowball's early wins are a feature, not a flaw. If you are a numbers person who finds satisfaction in the interest saved, avalanche will keep you going on its own.
How to read the clear order
The clear order line shows the sequence each method pays off debts in. Watch where they diverge: if snowball clears a low-APR debt early, that is its cost — money spent on cheap debt while expensive debt runs longer.
A hybrid many people use: snowball the first 1-2 small debts for momentum, then switch to avalanche for the rest. You get the early win and most of the interest savings.
Assumptions
- All rates fixed for the simulation.
- Budget = sum of minimums plus one extra pool applied to the target debt; when a debt clears, its minimum joins the extra pool (cascading).
- No new debt, no rate changes, no income changes.
- Simulation runs month by month up to 100 months; beyond that it reports never.
Frequently asked questions
Which method do most financial advisors recommend?
Avalanche, on pure math. The interest savings are real but typically modest — the bigger decision is committing to either method consistently rather than switching mid-plan.
Can I combine both?
Yes — snowball the smallest one or two debts for early wins, then avalanche the remainder. This captures most of the interest savings with the motivational benefit.
Does the order matter if my debts have similar rates?
Little. When APRs are close, the interest difference between methods is small, so pick whichever feels more sustainable.
What if my budget is below the total minimums?
The tool tells you — in that state the debts grow regardless of order. The fix is budget (raise income, cut spending) or restructuring (consolidation), not strategy.
Related tools
Credit Card Payoff Calculator
Enter your balance, APR, and payment. See how long payoff takes, how much interest you'll pay, and what paying more saves.
Try it →Debt Consolidation Calculator
Enter your debts and a consolidation loan offer. See the new single payment, total interest, and whether the loan actually beats your current path.
Try it →Personal Loan Payment Calculator
See the exact monthly payment and total interest for any personal loan amount, APR, and term — plus how the term changes the cost.
Try it →