Debt Snowball vs Debt Avalanche: Which Should You Use?

If you have more than one debt, the question is not just how much to pay but where to send the extra money. Two well-known strategies answer that question in different ways: the debt snowball and the debt avalanche.

Both work. Both rely on the same basic discipline of paying every minimum and throwing everything spare at one target. The difference is the order in which you tackle your debts, and that order changes both the total interest you pay and how motivated you feel along the way.

This guide explains each method, runs both through the same worked example, and helps you choose. Here at FlyJanuary.org we think the honest answer is “it depends on you”, so we will show you exactly what it depends on.

The ground rules both methods share

Before choosing an order, set up the foundations:

1. List every debt with its balance, interest rate (APR) and minimum monthly payment.
2. Decide your total monthly debt budget, the fixed amount you will put towards debts every month. Our guide on how to build a monthly budget can help you find it.
3. Pay the minimum on every debt, every month, without exception.
4. Send everything left over to one target debt.
5. When a debt is cleared, roll its payment into the next target. The amount you pay towards debts each month stays the same, so the payment on each new target keeps growing.

That rolling effect is where both methods get their power. You are not paying more each month overall; you are concentrating the same money in one place.

How the debt snowball works

With the snowball, you order debts by balance, smallest first, regardless of interest rate.

The appeal is psychological. You clear your first debt quickly, which gives you a visible win, fewer accounts to manage and a sense of momentum. Each cleared debt frees up its minimum payment to roll into the next, so the “snowball” of extra money grows.

Pros: quick early wins, fewer bills sooner, strong motivation. Cons: you may pay more interest overall, sometimes significantly more if a large debt has a very high rate.

How the debt avalanche works

With the avalanche, you order debts by interest rate, highest first, regardless of balance.

The logic is mathematical. Every pound you put towards the most expensive debt saves the most interest. Over the life of your repayment plan, this usually means paying less in total, and sometimes finishing sooner.

Pros: lowest total interest, often the most efficient plan. Cons: if your highest-rate debt is also large, it can take many months before you clear anything, which some people find demoralising.

A worked example: the same debts, two orders

Imagine Chris has three debts and can afford £400 a month in total towards them:

Debt	Balance	APR	Minimum payment
Store card	£800	18%	£30
Credit card	£3,000	22%	£90
Personal loan	£4,000	9%	£120
Total	£7,800		£240

Minimums add up to £240, leaving £160 extra each month for the target debt. For simplicity, the example assumes fixed rates, fixed minimums and no new borrowing, with interest calculated monthly. Real accounts differ, so treat these figures as approximate.

Snowball order: store card, then credit card, then personal loan. Avalanche order: credit card, then store card, then personal loan.

	Snowball	Avalanche
First debt cleared	Store card, month 5	Credit card, month 14
Second debt cleared	Credit card, month 16	Store card, month 16
All debts cleared	Month 23	Month 23
Approximate total interest	£1,060	£1,030

In this example, the avalanche saves about £30 in interest and both plans finish in the same month. The snowball, however, delivers a cleared debt in month 5 rather than month 14.

That is a common pattern when the smallest debt is not far behind the largest in interest rate. The gap between the methods grows when there is a big difference in rates, for example a large balance on a card charging 30% alongside a small balance on a 0% deal. In that situation, the avalanche can save hundreds of pounds or more.

The avalanche wins on paper; the snowball wins on morale. The method that saves you the most is the one you are still following in month eighteen.

How to choose

Ask yourself a few honest questions.

Choose the snowball if

• You have tried to clear debt before and lost motivation
• You have several small debts and want fewer bills to juggle
• The interest rates on your debts are fairly similar
• Quick, visible progress is what keeps you going

Choose the avalanche if

• You are motivated by numbers and efficiency
• One debt has a much higher rate than the others
• Your highest-rate debt is also reasonably small
• You are confident you will stick with it even without an early win

Or try a hybrid

Some people clear one very small debt first for a quick boost, then switch to the avalanche for the rest. Others use the avalanche but celebrate milestones, such as every £1,000 repaid, to create the wins the snowball provides. Nothing says you must follow either method purely.

Ways to speed up either method

Whichever order you choose, these can shorten the timeline:

1. Look at balance transfer or 0% deals for high-rate card debt, but check the transfer fee, the length of the 0% period and what rate applies afterwards.
2. Ask your provider for a lower rate. It does not always work, but it costs nothing to ask.
3. Put windfalls straight onto the target debt, such as tax refunds, bonuses or money saved from a no-spend January challenge.
4. Find extra income. Even £100 a month from realistic side income ideas can take months off the plan.
5. Stop adding new debt. Remove saved card details and, if needed, put cards somewhere inconvenient.

Protect yourself while you repay

Keep a small safety net

Paying off debt with no savings at all is risky. If the car breaks down, the repair goes straight back on a card and the plan stalls. A common approach is to build a small starter buffer, perhaps £500 to £1,000, before attacking debt aggressively, then build a full fund once the expensive debt has gone. Our guide on how big an emergency fund should be explains how to size it.

Know when to get help

If your minimum payments take up more than you can afford, you are borrowing to pay other debts, or you are missing payments, a repayment method on its own may not be enough. Free, confidential debt advice is available. In the UK, MoneyHelper can point you to reputable free services. In the US, look for a non-profit credit counselling agency. Be wary of firms that charge large upfront fees for help you could get free.

The bottom line

The snowball and the avalanche are two routes to the same destination. The avalanche is usually cheaper; the snowball is often easier to stick with. Run your own numbers, notice how you feel about each plan, and pick the one you will follow to the end. Then automate the payments, track your progress monthly and roll every cleared payment into the next target until there is nothing left.

This article is general information, not personalised financial advice. See our disclaimer.

Frequently asked questions

Which is better, debt snowball or debt avalanche?

Mathematically, the avalanche usually costs less in interest because it targets the most expensive debt first. In practice, the better method is the one you will keep following until every debt is gone, which for some people is the snowball.

Should I still pay the minimum on all my debts?

Yes. Both methods rely on paying at least the minimum on every debt each month and putting any extra money towards one target debt. Missing minimum payments can lead to charges and damage your credit file.

Where can I get free help if my debts feel unmanageable?

In the UK, free and confidential debt advice is available through services listed by MoneyHelper, including charities such as StepChange and Citizens Advice. In the US, look for a non-profit credit counselling agency. Avoid companies that charge high upfront fees.

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