Search “snowball vs avalanche debt” and you’ll find the same two paragraphs everywhere: avalanche saves more interest, snowball keeps you motivated, pick whichever fits your personality. All true. None of it tells you what either method actually costs on a debt load that looks like yours. Here’s that math, run on a real Canadian mix of debts at rates pulled live from the Bank of Canada and an actual card issuer, not textbook round numbers.
Two Methods, One Sentence Each
Avalanche ranks your debts by interest rate, highest to lowest, and throws every spare dollar at the top of that list while paying minimums on everything else. Snowball ranks the same debts by balance, smallest to largest, and attacks the smallest one first regardless of its rate. Once a debt is gone, its full payment rolls into the next one on the list either way.
Our full walkthrough of how to reduce and manage debt in Canada covers the reasoning behind both methods and the rest of the debt-reduction ladder. It stops short of an actual worked example, which is what follows here, in dollars and months.
The Debt Load We Ran the Numbers On
A single round number rarely resembles anyone’s real situation, so this uses a three-debt mix that does: a standard credit card, a retail store card, and a car loan.
| Debt | Balance | APR | Source |
|---|---|---|---|
| Credit card | $2,600 | 21.34% | Bank of Canada, average rate on existing balances, June 2026 |
| Store card | $4,200 | 25.99% | Canadian Tire’s Triangle Mastercard, non-base rate tier |
| Car loan | $14,800 | 6.83% | Bank of Canada, average rate on existing auto loans, June 2026 |
The credit card and car loan rates come straight from the Bank of Canada’s banking and financial statistics, which track the actual average rate chartered banks charge on outstanding balances every month, broken out by credit card, auto loan, and several other categories. The store card rate is the Triangle Mastercard‘s own disclosed annual rate for applicants who aren’t approved at its base 19.99% tier, which is common and worth knowing before you assume a store card’s advertised rate is the one you’ll actually get.
The gap between the car loan’s rate and the two cards is the point. Car loans are secured against the vehicle, so they’re priced far below unsecured revolving debt almost every time, even for the same household. That single fact does most of the work in deciding which method looks better here.
How We Ran the Numbers
Both schedules use the same rules, so the only variable is which debt gets the extra dollars first.
- Minimum payments: 3% of the starting balance on each card ($78 on the credit card, $126 on the store card), the standard formula card issuers use. It’s the same convention our minimum credit card payment breakdown uses, including the caveat that a real minimum recalculates and shrinks as the balance falls. The car loan carries a fixed installment of $353 a month, based on 48 months remaining on the loan.
- Extra payment: $500 a month on top of all three minimums, for a total monthly debt payment of $1,057.
- Freed minimums roll forward: when a debt hits zero, the minimum it was absorbing joins the extra payment and goes to the next debt in line. That rolling is what makes either method work, and it is why the total monthly payment never drops below $1,057 until the last debt clears.
- Compounding: interest accrues once a month, calculated as the balance times the APR divided by 12, added before that month’s payment is applied. Every dollar above minimums goes entirely to the current target debt until it hits zero, then the next debt in line gets everything that debt was receiving.
Plug these into a spreadsheet with the same three balances, rates, and payment rules, and you should land on the same numbers below within a few dollars of rounding.
Avalanche: Highest Rate First
Avalanche attacks in this order: store card (25.99%), then credit card (21.34%), then car loan (6.83%).
| Debt | Paid off in | Interest paid |
|---|---|---|
| Store card | Month 8 | $388.82 |
| Credit card | Month 11 | $419.46 |
| Car loan | Month 23 | $1,255.45 |
Total: debt-free in 23 months (1 year, 11 months), having paid $2,063.73 in interest.
Snowball: Smallest Balance First
Snowball attacks in this order: credit card ($2,600), then store card ($4,200), then car loan ($14,800), ignoring rate entirely.
| Debt | Paid off in | Interest paid |
|---|---|---|
| Credit card | Month 5 | $134.92 |
| Store card | Month 11 | $741.48 |
| Car loan | Month 23 | $1,260.25 |
Total: debt-free in 23 months (1 year, 11 months), having paid $2,136.66 in interest.
Snowball vs Avalanche: The Actual Difference
| Avalanche | Snowball | Difference | |
|---|---|---|---|
| Time to debt-free | 23 months | 23 months | None |
| Total interest | $2,063.73 | $2,136.66 | $72.93 |
| Total paid | $23,663.73 | $23,736.66 | $72.93 |
On this debt load, avalanche saves $72.93 over just under two years. Both methods clear every debt on exactly the same month. That’s not a rounding error. It’s what happens when the smallest balance (the credit card) also happens to carry the second-highest rate, so snowball only delays hitting the true highest-rate debt (the store card) by a few months rather than years. The $73 comes almost entirely from the store card sitting at 25.99% for three extra months while snowball clears the credit card first.
Textbook comparisons often use debts with balances and rates that run in opposite directions, which produces a much bigger gap and makes avalanche look like the obvious answer. Real debt loads don’t always split that cleanly. Run your own numbers before assuming either outcome.
What This Means for You
If your own rates and balances happen to line up the way avalanche and snowball agree on what to pay off first, as they partly do here, the method matters less than actually sticking with one. A $67 gap over two years buys you nothing if switching methods every few months, or giving up around month four, costs far more in restarted interest and lost momentum.
The math still matters more when your own numbers diverge further than the ones in this example. A large balance sitting at a low rate while a small balance carries a brutal one is exactly when avalanche pulls ahead by hundreds or thousands of dollars, not $67. Total up your own balances, rates, and realistic extra payment, then run both orders before picking one.
When the Math Doesn’t Get You There
This works when a household can put meaningful extra dollars toward debt every month and see an end date within a few years. When the numbers don’t clear a debt load within a reasonable stretch even with extra payments, that’s a different conversation than snowball or avalanche. Our comparisons of debt settlement vs debt consolidation and consumer proposal vs bankruptcy cover those routes, including what each does to your credit file and what it actually costs.
If a lower rate on your highest-interest debt is the real gap standing between you and either payoff plan working, comparing what you might qualify for is worth ten minutes. Get matched with a Canadian lender today →
Frequently Asked Questions
Avalanche saves more interest by definition, since it always attacks the highest rate first. How much more depends entirely on your specific balances and rates. In the debt load above, avalanche saved $72.93 over 23 months. With a bigger rate spread, the gap grows fast.
Two debt payoff orders that use every spare dollar differently. Avalanche ranks debts by interest rate, highest first, and attacks that one while paying minimums elsewhere. Snowball ranks debts by balance, smallest first, ignoring rate entirely. Once a debt clears, its payment rolls into the next one either way.
It depends on the debts involved, not the method itself. In the example above, both methods cleared every debt in exactly 23 months, since the same total dollars went toward debt either way. Avalanche is only guaranteed to be faster or cheaper when rates and balances point in different directions.
It ignores interest rate entirely, so it can leave a high-rate debt accumulating interest longer than necessary. In this example that cost an extra $72.93. With a bigger gap between your highest and lowest rate, snowball’s cost can run into the hundreds or thousands of dollars.
Almost always, the credit cards first. Car loans are secured against the vehicle, so they typically carry rates far below unsecured cards. In the example above, the car loan’s 6.83% rate put it last under both avalanche and snowball, well behind either card.
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