How the grace period works
A credit card is not a loan by default. It becomes one only when you do not pay it off in full. Between the day your statement is printed and the day payment is due, there is an interest free window called the grace period. Under the federal rules for banks, a federally regulated financial institution must give you a grace period of at least 21 days on new purchases, measured from the last day of your billing period to your payment due date. This is set out by Canada's Financial Consumer Agency (FCAC).
Here is the example FCAC uses. Suppose you buy a phone with your card on January 15. On February 1 you get your January statement, which includes that purchase. A 21 day interest free grace period applies, so you have until February 21 to pay off the phone and your other purchases with no interest at all. Pay in full by that date and the purchase was effectively free to borrow.
What happens the moment you carry a balance
The grace period is conditional. FCAC states it plainly: you pay interest if you do not pay your credit card balance in full by the due date, and you keep paying interest until you pay the balance back in full. In other words, paying only part of the bill, even most of it, is enough to lose the free ride. Once you carry a balance, interest begins accumulating on what you owe.
This is the part most people miss. The grace period is not a permanent feature of the card. It is a reward for paying in full. Miss a full payment once and interest charges start, and they continue every day until the balance is cleared.
How much the interest actually costs
Interest rates vary by card and by the type of transaction. FCAC's own illustration uses about 19 percent for regular purchases. Your exact rate is stated in your cardholder agreement and on your monthly statement, so check those for the real figure on your card.
The arithmetic below is a simple illustration, not a quote from any specific card. It shows the shape of the cost so you can reason about your own numbers.
| Balance carried | At about 19 percent, roughly one month | At about 19 percent, one full year |
|---|---|---|
| $1,000 | about $16 | about $190 |
| $3,000 | about $48 | about $570 |
| $5,000 | about $79 | about $950 |
The one year figures are simply the balance multiplied by the rate. The monthly figures divide that across twelve. Real cards accrue interest daily on the balance you owe, so the day to day number moves as your balance moves, but the yearly total lands close to balance times rate if the balance stays put. The point stands: a balance you never clear quietly costs you a fifth of it every year.
Cash advances have no grace period
Taking cash out against your card, at an ATM or a teller, works differently. FCAC is clear that there is no interest free grace period with cash advances. You pay interest from the day you take the cash until you pay it back in full, and the cash advance rate is usually higher than the purchase rate. FCAC's example pairs a 19 percent purchase rate with a 22 percent cash advance rate. There is also usually a separate cash advance fee each time.
Several everyday things count as cash advances even when they do not feel like it. FCAC lists cash like transactions that issuers often treat the same way, including wire transfers between financial institutions, money orders, travellers cheques, and gaming or gambling transactions such as buying casino chips or lottery tickets. Using a credit card cheque also triggers interest from the day you use it. All of these start the interest clock immediately, with no grace period.
Balance transfers
Balance transfers, moving debt from one card to another, also fall outside the standard purchase grace period. Promotional balance transfer offers can carry a low or zero introductory rate for a set period, but interest treatment and any transfer fee are governed by that specific offer, so read its terms. If you are weighing one, our guide to balance transfer credit cards in Canada walks through how the promotional rates and fees compare.
Minimum payments and rate increases
Paying only the minimum keeps your account in good standing, but it does not stop interest. On a carried balance, a large share of an early minimum payment goes to interest rather than principal, which is why minimum only payoff can stretch on for a very long time. Paying more than the minimum, in any amount, shrinks the balance the interest is charged on.
There is a further cost to missing payments. FCAC notes that if you do not make your required minimum monthly payment by the due date, your interest rate may increase, and the increase can be temporary or permanent. Missing a payment can also cost you a promotional rate. So the minimum payment is a floor to protect your standing, not a target to aim for.
How to pay the least interest
- Pay the full statement balance by the due date. This is the whole game. Do it and purchases cost you nothing to borrow.
- If you cannot pay in full, pay as much above the minimum as you can, and do it as early as possible so the balance the interest is charged on is smaller for longer.
- Avoid cash advances, cash like transactions, and credit card cheques unless there is no cheaper option, because interest starts the same day.
- Set an autopay for at least the minimum so a missed payment never triggers a rate increase, then pay the rest manually.
- Keep an eye on your balance relative to your limit. A lower balance costs less interest and helps your score. See how credit utilization works in Canada.
The cheapest interest is the interest you never pay.
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- Financial Consumer Agency of Canada, How credit cards work (grace period of at least 21 days, cash advances, cash like transactions, minimum payments and rate increases). Accessed August 6, 2026. https://www.canada.ca/en/financial-consumer-agency/services/credit-cards/credit-card-work.html
- Financial Consumer Agency of Canada, Getting a credit card: know your rights (statement disclosure and the amount due to keep the interest free grace period). Accessed August 6, 2026. https://www.canada.ca/en/financial-consumer-agency/services/rights-responsibilities/rights-credit-cards/right-to-information.html