A debt payoff plan you'll stick to: snowball, avalanche, and the app for either
Avalanche saves more interest. Snowball gets more people to the end. In our example the gap is $114 and nine months of motivation.
Leanfinit · 6 min read
Updated
Two orders for the same money
Both methods pay the minimum on every debt and put everything extra on one target debt. When that debt is gone, its payment rolls onto the next target. They differ only in the order:
- Snowball: smallest balance first, whatever the interest rate.
- Avalanche: highest interest rate first.
On paper, avalanche always costs the same or less. In practice, the question is which one you'll still be following in month 15.
A worked example
Three debts, 610 a month in total:
| Debt | Balance | Rate | Minimum per month |
|---|---|---|---|
| Store card | 900 | 12% | 30 |
| Credit card | 4,000 | 26% | 100 |
| Car loan | 7,500 | 8% | 180 |
- Snowball (store card → credit card → car): debt-free in 23 months, about 1,560 in interest. The first debt is gone in month 3.
- Avalanche (credit card → store card → car): debt-free in 23 months, about 1,440 in interest. The first debt is gone in month 12.
Avalanche saves about 114. Snowball gives you a paid-off debt nine months sooner. With this mix, the money difference is small; with a larger high-rate balance, it grows.
What the research says
- Small wins predict finishing. A study of nearly 6,000 clients of a debt-settlement firm found that closing more individual accounts predicted getting out of debt, independent of the dollars repaid (Gal & McShane, 2012, Journal of Marketing Research). The authors still call paying high-interest debt first the rational default.
- Focus helps, and focus on a small debt helps most. Concentrating payments on one account rather than spreading them raised motivation and repayment, most when that account was the smallest (Kettle, Häubl, Trudel & Blanchard, Journal of Consumer Research).
- Snowball works best when rates are similar. In a lab task, finishing small parts first led to more completions (71% vs 48%), but the authors conclude it pays off mainly when the debts' interest rates are close (Brown & Lahey, NBER, 2014).
A practical rule: if your highest rate is far above the rest, go avalanche; if the rates are close, or you've quit a plan before, go snowball.
What a debt payoff app should show
- 1Each debtBalance, rate, minimum.
- 2The orderSnowball or avalanche, with a switch.
- 3The month each debt is goneRecalculated when you pay extra.
- 4A one-tap payment logThe balance moves when you pay.
- 5A visible countdown“2 of 3 debts paid, debt-free in 11 months”.
None of this needs a bank link; you enter the balances once and log payments as you make them. Our debt snowball planner is one person's version. To build yours, describe your debts and your order (example below). With Leanfinit it runs on your phone with no server behind it, and it's free during the beta.
To keep minimums from slipping, add a bill due calendar. Once the first debt is gone, a net worth tracker shows the other side of the progress, and a budget built around your method keeps the 610 a month available.
FAQ
Is snowball or avalanche better?
Avalanche costs less interest. Snowball gives earlier wins, which research links to finishing. If rates are close, snowball costs little extra.
How do I make a debt payoff plan?
List each debt's balance, rate and minimum, choose an order, and put every extra unit of money on the first debt in that order.
Can I switch methods halfway?
Yes. Only the order of the remaining debts changes.
Do I need to link my bank to a debt payoff app?
No. Enter balances once and log payments yourself.
Describe your own app →
Takes a few sentences. Private, yours.
“A debt payoff plan. Debts: store card 900 at 12% (min 30), credit card 4,000 at 26% (min 100), car loan 7,500 at 8% (min 180). I can pay 610 a month. Use the snowball order, show the month each debt is paid off, and let me log each payment.”
General information, not financial advice.
Sources
Prices and facts checked 27 October 2026