Interest-Only Payments Are a Trap: How a Low Bill Hides a Balance That Never Falls

An interest-only payment keeps your monthly cost low because it covers only the interest that accrued during the period. The balance you owe does not fall. That is not a hidden fee or a paperwork trick — it is how the product is built, and it is why a low monthly bill can sit on top of a debt that stays exactly where it started for years. The fix is structural: either convert the balance to a scheduled repayment, or attach a fixed principal payment to the revolving credit you already have.

What an interest-only payment actually covers

Every debt payment splits into two parts. One part pays interest, which is the price of having borrowed that money for that period. The other part reduces principal, which is the amount you actually owe. When a payment is interest-only, the second part is zero.

This matters because of how interest is calculated: it is charged on the outstanding balance, for the time it is outstanding. If the balance never changes, the interest charge never changes either. You can pay faithfully on the same day every month for years and finish owing precisely what you started with.

The Financial Consumer Agency of Canada publishes plain-language guidance on debt and borrowing, including how credit is priced and what your options are when a balance is not coming down. It is a reasonable first stop before you sign anything.

Why a low payment is often the more expensive one

Total cost of borrowing is not the monthly payment. It is the monthly payment multiplied by the number of payments, plus fees. Shrinking the payment while leaving the balance intact lengthens the tail, and the tail is where the money goes.

There is a second effect that is easier to miss. A low payment frees up cash flow today, which makes a larger debt look affordable. Lenders and borrowers both assess capacity partly through the size of the required payment, so a smaller payment can make a bigger balance look serviceable than it really is. That is how people end up carrying more debt than they intended to take on.

Where interest-only hides in Canadian borrowing

It rarely appears under that name on a statement. It shows up as:

• A personal line of credit where the minimum payment is calculated from the interest owing for the period.
• A home equity line of credit used as a permanent balance rather than a short bridge between transactions.
• A credit card minimum payment set at a small percentage of the balance, which is sometimes barely above the interest charge.
• Deferred payment promotions where nothing is due for a set period and the balance simply waits.
• Interest-only periods attached to some instalment products during a deferral window.

How does a line of credit work — and why is the minimum the problem?

A line of credit is revolving credit. You are approved for a limit, you draw what you need, and interest is charged on the amount you have actually drawn. As you repay, the available room comes back. That flexibility is the whole point of a personal line of credit, and it is also what makes a permanent balance so easy to maintain.

Because the balance floats rather than amortises, there is no built-in schedule to retire it. If the minimum payment is derived from the interest owing, the balance behaves like a subscription: the charge recurs, the debt stays, and nothing in the product itself forces principal to fall. The Financial Consumer Agency of Canada explains how revolving credit and minimum payments are structured, which is worth reading alongside your own statement.

The practical test takes two minutes. Find the interest charged on your last statement and compare it with the minimum payment due. If those two numbers are close, you are on an interest-only treadmill regardless of what the paperwork calls the product.

The rules that set the outer limits

Canada does have ceilings on the cost of credit, and it helps to know where they sit, as set out in federal consumer guidance on debt and borrowing:

• The Criminal Code sets the criminal rate of interest at 35% per year (s. 347), calculated using a defined method that aggregates interest and certain charges.
• Where a province operates a licensed payday lending regime, federal payday lending regulations (SOR/2024-114) cap the cost of borrowing at $14 per $100 advanced. Some provinces set a lower cap, and the lower figure applies.
• Quebec does not license payday lending, which effectively prohibits the model there.
• Payday loans are generally up to $1,500 for a term of 62 days or less.

Secured borrowing has its own limits. At federally regulated lenders, home equity lines of credit are generally limited to 65% of appraised property value, with total secured lending usually capped at 80%. Federally regulated mortgage lenders generally work to a total debt service ratio ceiling of about 44% and apply a qualifying stress-test rate above the contract rate under Guideline B-20. Canadian fixed-rate mortgages are compounded semi-annually by law. These numbers matter here because consolidation is the most common escape route from an interest-only balance — and the ceiling is where that route eventually stops.

How to structure repayment instead

1. Quantify the treadmill. Note the interest charged last period and the minimum due. The gap between them is the only part reducing your debt. If the gap is nothing, that is your starting point.
2. Add a fixed principal amount. Pay the interest plus a set sum toward principal every period, regardless of what the minimum says. This is the fastest change you can make without refinancing anything.
3. Convert revolving credit into an amortised loan. An instalment loan has a fixed payment and a defined end date. That converts an open-ended balance into a schedule, which is the whole difference.
4. Choose the amortisation honestly. A longer amortisation lowers the required payment and raises the total interest paid. If the lowest payment is the only one you can manage, that is information about the size of the balance, not a reason to stretch the term.
5. Price the trade-off before securing a debt. Moving unsecured balances onto a home equity line of credit can lower the rate, but a much longer term can still cost more overall — and it puts your home in the collateral position. That is a serious change in risk, not a simple upgrade.
6. Automate the payment. A repayment plan that depends on remembering to make an extra transfer each month will fail in the month you are busiest.
7. Stop re-drawing. The single behaviour that defeats repayment on any line of credit is treating freed-up room as available spending.
8. Understand how the rate can move. Variable-rate lines of credit move with the market, so a payment that is comfortable today is a payment you should stress-test against a higher rate before you rely on it.

If the balance cannot be repaid on any schedule

When the arithmetic genuinely does not work, the regulated options are specific. Only a licensed insolvency trustee can administer a consumer proposal or a bankruptcy; trustees are regulated by the Office of the Superintendent of Bankruptcy Canada. A consumer proposal stays on a credit report for three years after completion, or six years from filing, whichever comes first. A first bankruptcy stays on a credit report for six years after discharge.

Canada has two national credit reporting bureaus, Equifax Canada and TransUnion Canada, and a free copy of your credit report is available from each. Checking it before you apply anywhere is worthwhile, because errors are common enough to be worth correcting. If you have a complaint about a federally regulated financial institution, the Financial Consumer Agency of Canada handles it; provinces license and supervise most other lenders, and each province has a consumer protection office.

Questions to ask before you sign anything

• Is the minimum payment calculated as interest only, or does it include principal?
• If I never paid more than the minimum, when would the balance actually be gone?
• Is the rate fixed or variable, and what is it calculated on?
• Is this debt secured against my home or another asset?
• If I miss a payment, is unpaid interest added to the balance?
• Is there any penalty for paying it off faster?

When interest-only is defensible

Interest-only is not automatically wrong. It is defensible when there is a defined end date and a defined source of repayment: a bridge while a property sells, a seasonal income cycle, a short gap between contracts. It stops being defensible the moment the end date becomes someday and the source becomes future income — because an interest-only balance is designed to wait until both arrive.

Decisions about consolidating, refinancing or restructuring significant debt depend on individual circumstances. Regulated professional advice — from a licensed insolvency trustee, an accountant or a lawyer — is appropriate before you commit to a secured loan or a formal insolvency filing.

loanwolf.ca is a matching service, not a lender. It does not make loans, set rates or make credit decisions, and it cannot approve anyone. Any rate you are offered comes from the lender that assesses your file, and the lowest rates available in the market go to the most qualified applicants — which is another reason to reduce the balance before you shop, not after.