Debt snowball vs avalanche: which payoff order fits you

When you owe money on several accounts, the order in which you clear them matters less than whether you keep paying. Still, the two best-known orders give different results, and it helps to see the difference in numbers.

The two methods

Both methods start the same way. Pay the minimum on every debt, then put every spare euro on one debt. When that debt is gone, move its whole payment, minimum plus extra, onto the next one.

• Snowball: the extra goes to the smallest balance first. Debts disappear quickly, so you see progress early.
• Avalanche: the extra goes to the highest interest rate first. You pay less interest overall, because the most expensive debt is cleared soonest.

A worked example

The debts below are made up. We calculated the result month by month, with interest added each month at the annual rate divided by 12, then payments applied. The total budget is EUR 490 a month: the three minimums, EUR 340, plus EUR 150 extra.

In the snowball plan the small loan is gone in month 5, and the credit card in month 26. In the avalanche plan the credit card is gone in month 22, and the small loan only in month 24.

The avalanche plan finishes two months earlier and saves about EUR 381. It also makes you wait 22 months before the first debt disappears, against 5 months for the snowball. That wait is the real cost of the avalanche for many people.

Real debts add complications this example leaves out: fees, rates that change, interest calculated daily, and minimum payments that fall as the balance falls. Treat the example as a guide to the shape of the difference, not a forecast.

When the snowball fits

Choose it if you have started and stopped before, if one or two small debts are a constant worry, or if you know you need visible wins to stay on track. Researchers have studied exactly this question. Amar and colleagues (2011) looked at how people choose which debts to pay first, and Gal and McShane (2012) asked, in the title of their paper, whether fighting small battles can help win the war. We list both papers under Sources so you can read the findings yourself. We do not summarise them here, because their results are about groups of people, and you are one person.

When the avalanche fits

Choose it if one debt carries a much higher rate than the rest, as the credit card does in the example, or if your debts are all large and clearing a small one would not change much. The bigger the difference between your highest rate and the others, the more the avalanche saves.

A mixed approach

You can combine them. Clear one very small debt first for a quick win, then switch to the highest rate. Write the rule down before you start, for example "after the first debt, always the highest rate", so you do not rework the plan every month.

Two cases that need extra care

Debts at 0%. A promotional rate does not grow, so it can wait, but check the date the rate ends. Put that date in your calendar, and move the balance up your list before it arrives.

Debts with a penalty for early repayment. Read the terms before sending extra money. If a penalty applies, the order may change.

How to start this week

1. List every debt with its balance, interest rate and minimum payment. Use the figures on your latest statements, not memory.
2. Work out your extra amount: what is left after essentials and all the minimums. Be modest. A smaller extra you can keep paying beats a bigger one you drop in month three.
3. Pick the method with the rule above, and write the order down.
4. Set every minimum to pay automatically, so the extra is the only payment you have to remember.
5. Each month, check that the freed-up payment moved to the next debt. This is where most plans leak.
6. Re-run the numbers when anything changes: a new rate, a bonus, a missed month.

Windfalls

A tax refund or a gift is a chance to shorten the plan. Both methods work the same way: send the lump sum to the debt at the front of your list. Before you do, keep a small cash buffer, so one unexpected bill does not push you back onto a card.

Running it in a spreadsheet

You can build this yourself with a table of balances, rates and minimums, and one row for each month. It is easy to get wrong when a debt is paid off mid-month, and when freed-up minimums roll onward, which is why people use a tested sheet.

Tool that fits

The Personal Budget & Debt Payoff Planner (Excel, EUR 14, paid once) compares snowball and avalanche for up to 10 debts. It shows the payoff month for each debt, total interest and the debt-free date, with a month-by-month schedule built from plain formulas you can inspect. It also holds a 12-month budget. It works in Excel 2016 and later, Google Sheets and LibreOffice.

Questions people ask

Sources

1. Amar, Ariely, Ayal, Cryder and Rick (2011), Winning the battle but losing the war: the psychology of debt management, Journal of Marketing Research
2. Gal and McShane (2012), Can small victories help win the war? Evidence from consumer debt management, Journal of Marketing Research 49(4), 487-501
3. HiddenWay worked example: our own arithmetic, assumptions listed in the text

We checked each source on 16 October 2026. If a fact here is out of date, tell us at hello@hiddenway.info.

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