Debt Snowball vs. Avalanche: A Worked Example With Real Numbers

The debt snowball and the debt avalanche are the two best-known ways to pay off several debts. Both work. They differ in one thing: the order in which you attack your debts. This guide explains each method, then runs the same set of debts through both so you can see the difference in months and interest, not just in theory.

The two methods in one sentence each

• Debt snowball: pay minimums on everything, and put every extra dollar toward the debt with the smallest balance first. When it's gone, roll its payment into the next smallest.
• Debt avalanche: pay minimums on everything, and put every extra dollar toward the debt with the highest interest rate first. When it's gone, roll its payment into the next highest rate.

In both methods, the payment from a paid-off debt is never "freed up" for spending. It rolls forward, so your attack payment grows over time. That rollover is what makes either method much faster than paying minimums.

The example debts

This is a made-up but realistic household with four debts. Interest is calculated monthly on the remaining balance, minimums stay fixed, and the household adds $200 a month on top of the minimums (a total of $625 a month).

Total debt is $14,700.

Results: snowball vs. avalanche vs. minimums only

We simulated each approach month by month. Here's what happened:

These are estimates from our own calculation for this example only. Your results depend on your balances, rates, and payments.

Payoff order and month each debt was cleared:

What the example shows

The extra $200 matters far more than the method. Adding $200 a month cut the payoff time from 46 months to 27 or 28 and roughly halved the interest. Choosing between snowball and avalanche changed the result by one month and about $237 in this example.

The avalanche saved the most interest, because the 24% credit card got the extra money sooner instead of the 12% personal loan. That's always the mathematical edge of the avalanche: money goes to the most expensive debt first.

The snowball gave a second "win" sooner. The personal loan was gone by month 11 under the snowball, while the avalanche's second payoff came at month 18. For many people, crossing a debt off the list keeps them motivated, and a plan you stick with beats a slightly cheaper plan you abandon.

Notice that both methods paid off the store card first here. It had the smallest balance and the highest rate, so both methods agree. When your smallest debt is also your most expensive, the choice is easy.

How to choose

• Choose the avalanche if your high-rate debts are large and you're motivated by numbers. The bigger the gap in interest rates, the more the avalanche saves.
• Choose the snowball if you've tried and quit before, or if you have several small balances you could clear quickly. Early wins are real motivation.
• Try a hybrid: clear one or two tiny balances first for momentum, then switch to highest rate.

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A simple starter spreadsheet for Google Sheets or Excel. List your take-home pay and bills and see what each paycheck has left. Free, instant download.

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How to run your own comparison

1. List each debt with its current balance, interest rate (APR), and minimum payment. Your statements or online accounts have all three.
2. Decide on a realistic extra amount per month. Even $50 changes the timeline.
3. Order the list two ways: by balance and by APR.
4. Each month, pay minimums on all debts and send the extra to the top debt on your list.
5. When a debt hits zero, add its minimum to the extra and move down the list.

Doing this by hand for every month is tedious, which is why a spreadsheet helps. Our Debt Payoff Tracker lets you choose snowball or avalanche, shows an estimated payoff month for each debt and the total interest estimate, and compares both strategies side by side.

Where to find extra money for debt

• Plan your three-paycheck months toward debt.
• Cancel one or two subscriptions and redirect that exact amount.
• Put part of any tax refund or bonus toward the top debt.
• Ask your card issuer about a lower rate; it doesn't always work, but it costs nothing to ask.

Keep a small cushion while you pay down debt

If a surprise expense goes straight onto a credit card, the plan stalls. Many people keep a small starter emergency fund while paying debt so a flat tire doesn't become new debt. See emergency fund on a biweekly paycheck.

Official help if you're struggling

If you can't keep up with minimum payments, the Consumer Financial Protection Bureau has free information on debt and on choosing a reputable credit counselor at consumerfinance.gov. Be cautious of companies that charge large upfront fees to "settle" debt.

The bottom line

Snowball and avalanche are both good plans. The avalanche usually costs less in interest; the snowball usually feels better sooner. In our example, the bigger win by far came from paying more than the minimums and rolling every freed-up payment forward. Pick the method you'll stick with and start this payday.

What if your situation looks different?

If your debts have very similar interest rates, snowball and avalanche will produce nearly identical results, so pick the snowball for motivation. If one debt has a much higher rate and a large balance, the avalanche's savings grow, and it's worth considering even if the first payoff takes longer. If a debt has a promotional 0% rate that ends on a set date, plan to pay it off before the promotion ends, because the rate after it can be high. Whatever the case, write the order down so each payday's decision is already made.

This guide is general educational information, not financial, tax, legal, or insurance advice. Examples are illustrations, not predictions. See our disclaimer.