Debt Avalanche vs Snowball: Which Strategy Works Better?

When you're trying to pay off multiple debts, choosing the right strategy can save you thousands in interest. The two most popular approaches are the Debt Avalanche and Debt Snowball methods. Here's how they compare.

What is the Debt Avalanche Method?

The Debt Avalanche focuses on interest rates. You pay off the debt with the highest APR first, while making minimum payments on everything else.

• Pros: Saves the most money in interest. Mathematically optimal.
• Cons: Can feel slow if your highest-rate debt is also your largest balance.

What is the Debt Snowball Method?

The Debt Snowball focuses on psychology. You pay off the smallest balance first, regardless of interest rate, to build momentum.

• Pros: Quick wins boost motivation. Seeing debts disappear feels rewarding.
• Cons: Costs more in interest over time.

Which One Should You Choose?

Real Example

Imagine you have three debts:

• Credit Card A: £2,000 @ 22% APR
• Credit Card B: £5,000 @ 18% APR
• Personal Loan: £8,000 @ 12% APR

Avalanche: Pay off Card A first (highest rate).
Snowball: Pay off Card A first (smallest balance).

In this case, both methods start the same. But if Card B were £1,500 instead, Snowball would target it first while Avalanche would still prioritize Card A.

The Bottom Line

The "best" method is the one you'll actually stick with. If you need motivation, Snowball works. If you're focused on numbers, Avalanche saves more. Tools like cashstr.app can help you visualize both strategies and see exactly how much you'd save with each.