Debt Snowball vs Debt Avalanche: Which Method Should You Use?

Last updated: 4 November 2026. General information, not financial advice.

You’ve listed your debts, you’ve found a bit of spare money each month, and now you’re stuck on one question: which debt do I pay off first? Do you go for the smallest balance to get it gone, or the one with the highest interest rate to save money?

These two approaches have names: the debt snowball and the debt avalanche. Both work, and both are far better than spreading spare money thinly across everything. This guide explains how each one works, shows a worked example with UK-style debts, and helps you pick the one you’ll actually stick with.

It’s part of my debt and credit UK guide.

Before you start: make sure your priority bills (rent or mortgage, council tax, energy) are covered and every debt has at least its minimum payment set up. If you can’t manage that, a free debt adviser can help: see free debt advice.

How both methods work

The basic rules are the same for both:

1. Pay the minimum on every debt, every month.
2. Put all your extra money towards one “target” debt.
3. When it’s paid off, add its payment to the next target.
4. Repeat until you’re debt-free.

The only difference is which debt you target first.

The debt snowball: smallest balance first

List your debts from smallest balance to largest, ignoring interest rates. Throw your extra money at the smallest one.

Why people love it: you clear your first debt quickly. That win feels good, it frees up a payment, and it gives you proof the plan works. Like a snowball rolling downhill, your payment grows with each debt you clear.

The downside: you might pay more interest overall, because a big, expensive debt waits longer.

The debt avalanche: highest interest rate first

List your debts from highest APR to lowest, ignoring balances. Throw your extra money at the most expensive one.

Why people love it: it’s the cheapest way to pay off debt, and often slightly quicker.

The downside: if your highest-rate debt is also large, it can be months before you clear anything, and some people lose motivation.

Worked example: snowball vs avalanche

Here’s an illustrative example (not anyone’s real accounts). Someone has three debts and can pay £350 a month in total:

That leaves £175 extra each month on top of the minimums.

• Snowball order: catalogue (£500), then loan (£1,500), then card (£3,000)
• Avalanche order: card (27.9%), then catalogue (14.9%), then loan (9.9%)

Working it through month by month:

Simplified: interest added monthly at APR ÷ 12, minimums fixed, no new spending or fees. Real accounts will differ.

What this shows:

• The avalanche saved about £230 and finished a month earlier.
• The snowball cleared the first debt in 3 months instead of 14, and two debts within 8 months.

So the avalanche wins on maths, but the snowball gives you wins much sooner. If you’d be tempted to give up during 13 months without clearing a single debt, the snowball could be the plan that actually gets you to the end.

Snowball vs avalanche at a glance

How to choose

Ask yourself these questions:

• Have I tried and given up before? → Snowball.
• Is one debt much more expensive than the rest (say, a store card or overdraft at a very high rate)? → Avalanche.
• Are my interest rates fairly similar? → Snowball. The cost difference will be small.
• Do I get a kick out of the numbers going down? → Avalanche.

You can also mix them. Clear one or two tiny balances first for a quick win, then switch to the highest rate. The best method is the one you’ll stick with.

Tips to make either method work

1. Automate it. Set Direct Debits for all minimums and a standing order for your extra payment on payday.
2. Stop adding to the debts. Take saved cards out of your phone and online shops.
3. Keep a small buffer so surprise costs don’t go back on a card. My £1,000 emergency fund guide shows how.
4. Roll payments forward. When a debt is cleared, the money that was going to it goes to the next one, not into everyday spending.
5. Put windfalls to work. Tax refunds, bonuses and money from selling things you don’t use can speed things up.
6. Look at lowering your rates. A 0% balance transfer can help if you can clear it before the offer ends.
7. Track your progress. My Debt Payoff Progress Tracker has pages for both methods and a chart you colour in. (It’s my own planner.)

What about priority debts?

The snowball and avalanche are for non-priority debts like cards, loans, overdrafts and BNPL. Priority debts, like council tax and energy arrears, always come first, whatever their size or interest rate. My guide to which debts to pay first explains why.

Snowball vs avalanche: people also ask

What is the debt snowball method?

The debt snowball means paying off your debts from smallest balance to largest. You pay the minimum on everything and put extra money towards the smallest debt. When it’s cleared, you add that payment to the next smallest. The quick wins help many people stay motivated.

What is the debt avalanche method?

The debt avalanche means paying off your debts from the highest interest rate to the lowest. You pay the minimum on everything and put extra money towards the most expensive debt. It usually costs the least in interest and can be slightly quicker.

Which is better, snowball or avalanche?

The avalanche usually saves more money. The snowball usually keeps people going for longer because they clear debts sooner. If your interest rates are similar, the difference in cost is small, so pick the one you’ll stick with.

Does the snowball method work in the UK?

Yes. It works the same way with UK credit cards, loans, overdrafts, catalogues and BNPL. Just make sure priority debts like council tax, rent and energy come first.

Should I include my mortgage or student loan?

Usually not. Mortgages are long-term, lower-rate debts, and UK student loan repayments are taken from your salary based on what you earn. Focus snowball or avalanche on consumer debts like cards and loans.

Can I switch methods halfway?

Yes. Many people start with the snowball for a quick win, then switch to the avalanche. As long as you keep paying the minimums and putting extra towards one debt at a time, you’re making progress.

Summary

• Both methods: pay all minimums, then target one debt at a time and roll payments forward.
• Snowball = smallest balance first. Faster wins, slightly higher cost.
• Avalanche = highest rate first. Lowest cost, slower first win.
• Choose the one you’ll stick with, and keep priority debts first.

Next step: put it all together with my step-by-step plan to get out of debt, or go back to the debt and credit UK guide.

General information only, not financial advice.

Sources (checked 4 November 2026): MoneyHelper: dealing with debt · MoneyHelper: how to prioritise your debts

Read next: debt snowball calculator.