Debt Repayment Methods Compared: Avalanche Versus Snowball

Debt repayment is a choice: clear the highest interest first (avalanche) or the smallest balance first (snowball). Both work; pick the one you'll stick with.

By Promissory.ca Editorial Team Reviewed against official Canadian sources Last updated: 2026-09-16

Two debt repayment strategies, one goal

When several balances are open at once — a credit card, a line of credit, a car loan, a student loan — paying only the minimum on each keeps the accounts current but barely dents the total. A debt repayment method decides where your extra money goes each month so that one balance falls faster than the rest. The two best-known approaches are the avalanche and the snowball. They differ in one decision only: which debt you attack first. Everything else is identical — pay every minimum on time, add whatever extra you can spare, and repeat until the list is empty.

Neither method is a financial product, and neither requires anyone's approval. They are simply rules you apply to your own budget.

The debt avalanche method

How the avalanche works

Write down each debt with its balance and its interest rate. Pay the minimum on all of them, then send every spare dollar to the debt carrying the highest interest rate. When that balance reaches zero, roll the entire payment — the minimum plus the extra — onto the next highest-rate debt. Repeat until everything is cleared.

Because interest is calculated on the outstanding balance, eliminating the most expensive debt first reduces the amount of interest that accumulates. For the same payment and the same time frame, the avalanche is the order that costs the least in interest.

Strengths and trade-offs of the avalanche

• Strengths: the lowest total interest for a given payment, mathematically efficient, and well suited to people motivated by numbers and a declining total.
• Trade-offs: if the highest-rate debt also has the largest balance, you may wait a long time before an account closes, which can drain motivation.
• Watch for: rates that move, such as on a variable-rate line of credit, can change the correct order mid-plan. Re-sort the list if that happens.

The debt snowball method

How the snowball works

List the same debts, but sort them by balance, smallest first. Ignore interest rates. Pay the minimums, then throw every spare dollar at the smallest balance. Once it is gone, add that payment to the next smallest balance and continue.

Strengths and trade-offs of the snowball

• Strengths: quick wins. Clearing an account early provides visible proof of progress, which helps people who have struggled to stay consistent.
• Trade-offs: a low balance with a modest rate may be cleared while a high-rate balance keeps growing, so you may pay more interest overall.
• Watch for: the goal is a zero balance, not a closed account. An account with no balance is still an account in good standing.

Debt repayment: avalanche versus snowball side by side

Both orders beat paying only the minimums, and that is the comparison that matters most. Any structured plan that keeps every account current and channels extra money in one direction will outperform scattered, irregular payments.

Which method fits your situation?

There is no universally correct answer, and the choice is not permanent.

• Choose the avalanche if your balances carry very different interest rates, if you are comfortable with spreadsheets, or if paying avoidable interest bothers you.
• Choose the snowball if you have abandoned previous payoff attempts, if your debts sit in a similar rate range, or if seeing an account reach zero is what keeps you going.
• Consider a hybrid: clear one small balance first for momentum, then switch to the highest-rate balance for the remainder.

A practical tie-breaker: if you have ever stopped a payoff plan partway through, choose the order that keeps you paying. A mathematically perfect plan you abandon is worth less than a slightly costlier plan you finish.

Build your debt repayment plan in five steps

1. Gather the facts. For each debt, note the balance, the interest rate, the minimum payment and the due date. Check recent statements rather than relying on memory.
2. Confirm the minimums are affordable. If they are not, contact each creditor before you fall behind and ask what options exist.
3. Find the extra. Review recurring expenses, subscriptions and one-off costs. Every dollar above the minimums goes to the next step.
4. Order the list. Avalanche means highest rate first; snowball means smallest balance first. Write the order down and keep it somewhere visible.
5. Review monthly. Confirm every payment cleared, recalculate balances, and adjust the order if a rate changed or a balance was eliminated.

Automate what you can. Scheduled payments reduce the chance that a busy month turns into a missed payment, and a missed payment costs far more than the interest you are trying to avoid.

Where consolidation, counselling and insolvency fit

Avalanche and snowball are self-managed plans. Other options exist when the balances are too large, or the interest too punishing, for those methods to make headway at a reasonable pace.

• Consolidation replaces several payments with one, sometimes at a lower rate. Compare the total cost over the full term, not just the monthly payment — a longer term can mean more interest paid overall.
• Credit counselling through a non-profit agency can help with budgeting and, in some cases, with a debt management plan negotiated with creditors.
• Insolvency options such as a consumer proposal or bankruptcy are handled by a licensed insolvency trustee. They carry serious consequences for your credit record, so treat them as a last resort rather than a shortcut.

Canada also sets an outer limit on the cost of credit: the criminal rate of interest is 35% APR under the Criminal Code. Payday borrowing is capped at $14 per $100 in provinces that permit it, with a maximum dishonoured-payment fee of $20 and a maximum loan of $1,500, and operators must hold a provincial licence; Quebec does not permit payday lending at all. If a payday loan or a similar high-cost product is on your list, it belongs at the top of either method, because its cost per dollar borrowed is far higher than ordinary consumer credit.

Common mistakes that slow debt repayment

• Paying extra on one debt while a different account slips past due.
• Adding new purchases or new credit while running a payoff plan, which resets the progress you just made.
• Chasing balance transfers without checking fees and what happens when a promotional period ends.
• Spending money that is needed for tax instalments. If the CRA requires you to pay tax by instalment, those amounts fall due on 15 March, 15 June, 15 September and 15 December and are not optional.
• Treating the plan as finished when the last balance closes, then rebuilding the same balances within a few months.

Making the method stick

Choose one order, set up payments so they happen automatically, and review the plan monthly rather than daily. Track only two numbers — total debt and the balance you are currently attacking — and mark each cleared account as a milestone. If your circumstances change, the method can change too; switching from snowball to avalanche halfway through costs nothing.

This article is general information, not financial advice. If your debts feel unmanageable, or you are being contacted by collection agencies, speak with a non-profit credit counsellor or a licensed insolvency trustee about the options available to you.