Debt snowball vs debt avalanche
How the debt snowball and debt avalanche methods work, which costs less interest, and how to choose, with the same debts run both ways.
Updated November 1, 2026
See the Debt Payoff Spreadsheet
What the two methods are
Both methods start the same way. You pay the minimum on every debt, put every extra dollar on one target debt, and keep the total you pay each month the same. When the target is paid off, its payment rolls onto the next debt. That roll-over is what makes the payments grow like a snowball.
The only difference is the order of the targets:
- Debt snowball: smallest balance first, whatever the interest rate.
- Debt avalanche: highest interest rate first, whatever the balance.
Why the order matters
The avalanche always costs the same or less interest, because the most expensive debt shrinks first. The snowball wins on motivation: small debts disappear in the first few months, and each one gone is one less bill and one more payment rolling forward.
How big the gap is depends on your debts. When the small balances also carry high rates, the two orders are almost the same. When a large balance has the highest rate, the avalanche can save a lot more.
How to set up a payoff plan
- List every debt with its balance, yearly interest rate (APR) and minimum payment. Use your latest statements, not memory.
- Decide your extra amount. What you can add every month on top of all the minimums, for example $300. Your monthly debt budget is all the minimums plus that extra.
- Sort the list by balance for the snowball or by rate for the avalanche.
- Run it month by month. Each month add interest to each balance, pay the minimums, and send what is left of the budget to the first debt on the list that still has a balance.
Doing step 4 by hand for three or four years of months is where a spreadsheet earns its keep. It also lets you run both orders on the same debts and compare them.
See the Debt Payoff Spreadsheet
What to record each month
Once the plan is running, write down what actually happened: the date and amount of each payment, and the balance from each statement. Plans drift. A new charge on a card, a missed payment or a rate change will move your debt-free date, and you only see it if you compare the plan with the real balances.
Which one to pick
- Pick the snowball if you have tried to pay off debt before and lost steam, or if you have several small balances you could clear in a few months.
- Pick the avalanche if one large debt has a much higher rate than the rest, or if you are motivated by the total interest number.
- Mix them if you like: clear one or two tiny balances first for a quick win, then switch to highest rate. A custom order is a plan too.
Whichever you choose, the two things that matter far more than the order are the size of the extra payment and not adding new debt.
Worked example
Five debts, $300 extra a month, starting January 2026. These are the sample numbers in the Reamwise Debt Payoff Spreadsheet, so you can check them against the file.
| Debt | Balance | APR | Minimum |
|---|---|---|---|
| Store card | 900.00 | 29.99% | 35.00 |
| Medical bill | 1,200.00 | 0.00% | 50.00 |
| Credit card | 5,200.00 | 24.99% | 150.00 |
| Car loan | 11,400.00 | 7.90% | 285.00 |
| Student loan | 18,500.00 | 5.50% | 210.00 |
The minimums add up to $730, so the monthly debt budget is $1,030.
| Plan | Months to debt-free | Total interest |
|---|---|---|
| Minimums only, no roll-over | 114 | 11,796.38 |
| Debt snowball | 42 | 5,126.76 |
| Debt avalanche | 41 | 4,900.98 |
Both methods pay off the store card in month 3. Then they split: the snowball clears the medical bill in month 6 and the credit card in month 16, while the avalanche goes straight for the credit card and finishes it in month 15, leaving the 0% medical bill until month 24.
The avalanche saves $225.78 and one month. Either plan beats paying minimums by about six years and more than $6,600 in interest. That gap, not the gap between the methods, is the headline.
Common mistakes
- Lowering the total payment when a debt is paid off. The freed-up minimum must roll onto the next debt, or there is no snowball.
- Using the minimum due on a later statement. Card minimums fall as the balance falls. Keep paying the original amount.
- Ignoring 0% deals that expire. A promotional rate that jumps later belongs higher in an avalanche list than its current rate suggests.
- Planning without an emergency buffer. One car repair on a credit card can undo months of progress. A small cash cushion first is common advice.
- Never comparing plan and reality. Check real balances every month or two.
Questions
Is the debt snowball or the debt avalanche better?
The avalanche costs less interest. The snowball gives faster early wins. The best one is the one you will stick with, and the size of your extra payment matters more than the order.
Should I include my mortgage?
Most people leave the mortgage out and pay it on schedule, because its rate is usually lower and the balance is much larger. You can add it at the end of the list if you want to see it.
What if a debt has a 0% rate?
The avalanche puts it last. The snowball still orders it by balance. If the 0% rate ends on a set date, check whether the balance will be gone by then.
What if my minimums are more than I can pay?
Then neither method works yet. Call the lenders about hardship plans, or talk to a nonprofit credit counselor before choosing an order.
How much extra should I pay each month?
Whatever you can keep up every month. Even $50 more shortens the plan; run a few amounts in a spreadsheet and see how the debt-free date moves.
Can I switch methods halfway?
Yes. Re-list the balances you have today and run the new order from now. Nothing about the earlier months needs to change.
Summary
The snowball and the avalanche both pay minimums everywhere, aim every extra dollar at one debt, and roll each finished payment onto the next. Snowball orders by balance, avalanche by rate. In the example the avalanche saves $225.78, while either one saves more than $6,600 against minimums only. To run both on your own debts and see the dates side by side, use the Debt Payoff Spreadsheet; if you have already decided on the snowball, the Debt Snowball Spreadsheet is the simpler file, and the Debt Payoff Tracker keeps the record once you start.
Disclaimer. For general information only. Not tax, legal or financial advice. Check the rules for your country or ask a qualified adviser. Read the full disclaimer.