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Two ways to pay off multiple debts. The avalanche attacks the highest interest rate first to save the most money; the snowball attacks the smallest balance first to build momentum. Here is how each works, a worked example, and how to choose.
Short answer
Both methods pay the minimum on every debt and throw all spare cash at one target debt at a time. The debt avalanche targets the highest interest rate first — it pays the least total interest and is mathematically optimal. The debt snowball targets the smallest balance first — it costs slightly more interest but clears whole debts sooner, which helps motivation. The avalanche wins on maths; the snowball often wins on follow-through.
With the avalanche, you rank your debts by interest rate, highest to lowest. You pay the minimum on all of them, then put every extra dollar on the highest-rate debt until it is gone. Then you roll that whole payment down to the next-highest rate, and so on.
Because interest is what makes debt expensive, killing the highest rate first means the least interest accrues overall. For any given amount of extra money, the avalanche clears your total debt in the shortest time and lowest cost of any ordering. The catch is that your first target might be a large balance, so it can take a while to see a debt fully disappear.
With the snowball, you rank your debts by balance, smallest to largest, and ignore the interest rate. You pay the minimum on all of them, then put every extra dollar on the smallest balance first. When it is cleared, its payment rolls into the next-smallest — the payment "snowballs" as each debt falls.
Popularised by personal-finance author Dave Ramsey, the snowball is built around behaviour, not arithmetic. Clearing a whole debt early is a visible win, and behavioural research on real repayment has found that these early wins help people stay motivated and keep going. It usually costs a little more interest than the avalanche, because it does not prioritise rate.
Say you have two debts and $300 a month spare after minimums:
| Debt | Balance | Rate | Avalanche order | Snowball order |
|---|---|---|---|---|
| Store card | $1,000 | 8% | 2nd | 1st |
| Credit card | $5,000 | 24% | 1st | 2nd |
The avalanche hits the 24% credit card first — it stops the most expensive interest, so you pay less overall. The snowball hits the $1,000 store card first — you clear an entire debt in a few months, get the psychological win, then roll everything into the credit card. Same debts, same $300; different order, different trade-off.
There is no universally correct answer — it depends on what tends to stop you:
Whichever you pick, the mechanics are the same: keep paying minimums on everything, and concentrate every spare dollar on one target at a time. You can track total debt and net worth as it falls in your net worth, and see the effect of an extra payment in the what-if scenarios. For a related retirement concept, see the safe withdrawal rate explainer.
Educational information, not financial advice. The avalanche and snowball are general strategies; the right choice depends on your debts, rates and habits, and this page does not recommend one for your situation. Consider a licensed financial adviser or a non-profit credit counsellor before making a plan.
The debt avalanche method is a payoff strategy where you make the minimum payment on every debt and put all your spare money toward the debt with the highest interest rate first. When that debt is gone, you roll its payment into the debt with the next-highest rate, and so on. Because it always attacks the most expensive interest first, the avalanche pays the least total interest and clears your debts in the least time of any ordering — it is the mathematically optimal method.
The debt snowball method is a payoff strategy where you make the minimum payment on every debt and put all your spare money toward the debt with the smallest balance first, regardless of its interest rate. When that debt is cleared, you roll its payment into the next-smallest balance, so the amount 'snowballs.' Popularised by personal-finance author Dave Ramsey, it is designed around motivation: clearing a whole debt quickly gives a visible win that helps people stay consistent.
It depends on what you are optimising for. The avalanche saves the most money and time because it eliminates the highest-interest debt first — if you are disciplined and want the lowest cost, it wins on the maths. The snowball can be better for follow-through: behavioural research has found that clearing whole debts early keeps people motivated, so some finish who might otherwise give up. A common summary is that the best method is the one you will actually stick with. This is educational information, not a recommendation for your situation.
Often, yes — for behavioural reasons. On paper the snowball usually costs a little more interest than the avalanche because it ignores rates. But paying debt off is as much about persistence as arithmetic, and studies of real repayment behaviour have found that people who clear small balances first tend to stay motivated and are more likely to finish. If the extra interest is small and the motivation keeps you going, many planners consider that a reasonable trade. If your highest-rate debt is very expensive, the avalanche's savings grow and can outweigh the motivation benefit.