Balance Transfer Cards Explained: When 0% APR Is Worth the Fee
By Jordan Ellis · Published · Reviewed
Quick Answer
A balance transfer moves high-interest card debt to a card charging a promotional rate, in Canada commonly 0%–3.99% for 6–12 months, usually for a 1–3% fee. On $6,000 at 22%, a 12-month 0% transfer with a 3% fee costs $180 versus about $740 of interest paying it off over the same 12 months (about $562/month) — a saving of roughly $560, if you clear it before the promo ends.
The mechanism
You apply for a card offering 0% intro APR on balance transfers. On approval, the new issuer pays off your old card (transfers take 1–3 weeks — keep paying the old card until it shows zero), charges a transfer fee (commonly 1–3%), and your debt sits at the promotional rate for the window, typically 6–12 months in Canada. Every dollar you pay hits principal.
The break-even math
Is the fee worth it? Compare it to the interest you’d otherwise pay during the promo window:
| Balance | Current APR | Interest over 12 mo* | 3% fee | Verdict |
|---|---|---|---|---|
| $3,000 | 22% | ~$370 | $90 | Transfer saves ~$280 |
| $6,000 | 22% | ~$740 | $180 | Transfer saves ~$560 |
| $6,000 | 10% | ~$330 | $180 | Transfer saves ~$150 |
| $2,000 | 18% | ~$200 | $60 | Saves ~$140 — but only if promo fits your payoff speed |
*Assuming equal payments that clear the balance in 12 months; exact figures depend on payment size. The rule of thumb: the transfer wins when the fee is clearly smaller than the interest you’d pay in the same period — which is usually true above ~15% interest for balances you’ll carry more than a few months.
The traps that backfire
- Promo mismatch. Transferring $10,000 you can only pay at $250/month leaves $7,000 at the card’s regular rate (often around 20%) when a 12-month promo ends. Match the transfer size to what you can clear — the payoff calculator solves for the required payment; transfer only that amount.
- New purchases. Many cards apply payments to the 0% balance first while purchases accrue interest immediately at the regular APR. Use a different card (or none) for spending.
- Deferred-interest lookalikes. Store cards advertising “no interest if paid in full in 18 months” charge retroactive interest on the whole original amount if you miss the deadline by a day. That’s a different product — avoid it for debt payoff.
- Serial transferring. Hopping promos every year adds a 1–3% fee each time and stacks hard inquiries. Once, with a payoff plan, is a strategy; repeatedly is a treadmill.
- The freed-up old card. The transfer empties your old card. If you refill it, you’ve doubled the problem. Freeze it.
The bottom line
A 0% balance transfer is the cheapest interest holiday in consumer credit — a 1–3% toll for 6–12 months of low or no interest. Used once, sized to a real payoff plan, with no new spending, it reliably saves hundreds to thousands. Run your number in the credit card payoff calculator first: if you can’t clear it in the promo window, a fixed-rate consolidation loan is often the safer tool.
Official sources
Rules and dollar limits change. Confirm current amounts with the official pages below before you act · Last reviewed .
- Credit cards (Financial Consumer Agency of Canada)