Debt avalanche vs debt snowball: which payoff method works better?

Last updated Oct 2026.

If you're carrying balances on a few credit cards, a line of credit and maybe a car loan, the hardest part often isn't finding the money. It's deciding where each extra dollar should go. Two methods come up again and again: the debt avalanche and the debt snowball. Both work. They just work in different ways.

This post explains each one with a simple example, then covers when a consolidation loan can help and how to stay motivated. To test your own numbers, use the debt payoff calculator.

First, the ground rules for both methods

1. List every debt with its balance, interest rate and minimum payment.
2. Always pay every minimum. Missed payments bring fees, penalty rates and credit score damage.
3. Pick a fixed extra amount you can put toward debt every month, even if it's small.
4. Put the entire extra amount on one target debt until it's gone, then roll everything you were paying on it to the next one.

The only difference between the two methods is the order of the targets.

The avalanche: highest interest rate first

With the avalanche, you aim your extra money at the debt with the highest interest rate, regardless of its balance. For most Canadians that's a credit card at around 20% or more, or a store card that can be close to 30%.

Why it works: every dollar goes where it stops the most interest. Mathematically, the avalanche almost always costs the least in total interest and gets you debt-free a little sooner.

The downside: if your highest-rate debt is also your biggest, it may be many months before you see a balance hit zero. Some people lose steam.

The snowball: smallest balance first

With the snowball, you aim your extra money at the smallest balance, regardless of rate. Once it's paid off, its payment "rolls" onto the next smallest, and the payment gets bigger like a snowball rolling downhill.

Why it works: you get quick wins. Closing out a debt in the first month or two feels good, and that motivation keeps many people going. Research on consumer behaviour has found that people who focus on closing individual accounts tend to stick with repayment.

The downside: you may pay more interest overall, sometimes noticeably more if a large, high-rate balance sits at the end of the list.

A worked example

Say you owe three debts and can pay $900 a month in total:

Here the smallest balance also has the highest rate, so both methods start with the store card. Next, the avalanche goes to the 20.99% credit card, and a snowball goes there too because it's the next smallest balance. In this case both methods give the same order.

Now imagine the credit card balance were $12,000 instead. The snowball would pay the $9,000 line of credit before the card, while the avalanche would attack the 20.99% card first. Over the payoff period, the avalanche would save several hundred dollars in interest in that scenario. The exact gap depends on your balances and rates, which is why it's worth running both in the debt payoff calculator.

The lesson: when your smallest debts also have the highest rates, the two methods are nearly identical. When they don't, the avalanche saves money and the snowball buys motivation.

Which one should you choose?

• Choose the avalanche if you're motivated by numbers and confident you'll stick with the plan.
• Choose the snowball if you've tried before and stalled, or if you have several small balances you could clear quickly.
• Try a hybrid: knock out one or two tiny balances for a quick win, then switch to the avalanche for the rest.

The method you'll actually follow beats the "optimal" one you abandon.

When consolidation can help

A debt consolidation loan or line of credit replaces several high-rate debts with one lower-rate payment. If you can move 20%+ credit card balances onto a loan at, say, 9% to 12%, more of each payment goes to principal. Before doing it, check:

• the interest rate and any fees on the new loan,
• the term (a long term can lower the payment but stretch out the interest),
• whether you'll be tempted to run the cards back up once they're cleared.

The debt consolidation calculator compares your current debts against a single loan. Balance-transfer card offers can also help short term, but watch the transfer fee and what the rate jumps to after the promo period. For a single card, the credit card payoff calculator shows how long minimum payments alone would take.

Finding the extra money

• Look at subscriptions and recurring charges. Cancelling two or three you don't use can free up $30 to $60 a month.
• Redirect windfalls. A tax refund, a GST/HST credit payment or a work bonus can go straight to the target debt.
• Call your card issuer. Some will lower your rate if you ask, especially if you have a good payment history.
• Keep a small emergency buffer. Even $500 to $1,000 set aside helps you avoid putting the next car repair back on a card. Our emergency fund plan explains how to build it up.

Staying on track

Write the plan down, put the target debt and the payoff date somewhere you'll see it, and check progress once a month. Automate the minimums so nothing gets missed. If a month goes badly, don't quit; just make the minimums and pick it back up. Our step-by-step pay off debt plan lays this out week by week.

If debt feels unmanageable, a non-profit credit counselling agency can review your options for free or at low cost, including a debt management plan. In Canada, a licensed insolvency trustee can explain a consumer proposal or bankruptcy. Be cautious with for-profit "debt relief" companies that charge large upfront fees.

FAQ

Does paying off a card early help my credit score?
Generally yes. Lower balances relative to your limits (credit utilization) tend to help. Keeping an old paid-off card open, if it has no annual fee, can also help your history.

Should I invest or pay off debt first?
Paying off a 20% credit card is like earning a guaranteed 20% return, which is hard to beat by investing. Lower-rate debt, such as a mortgage, is more of a judgment call. Our post on TFSA vs RRSP covers where saving fits.

What about a student loan?
Federal Canada Student Loans currently don't charge interest, and interest on eligible student loans may qualify for a tax credit, so they usually go to the bottom of the list. Provincial loans can differ.

This post is for educational purposes only and isn't financial, tax or investment advice. Rules, rates and limits can change. Confirm current details with Canada.ca, the CRA or your financial institution, and consider speaking with a qualified professional about your situation.