Mortgage Blog
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The New Math on Credit Card Debt
October 2, 2026 | Posted by: Daryl Johnson
What if the same debt cost you less than half as much every month?
Most credit cards in Canada charge around 19.99%. If you are carrying a large balance, that rate is doing serious damage. But if you own a home, there is another way to carry that debt, and the math is not close.
What $50,000 of credit card debt really costs
At 19.99%, a $50,000 balance racks up about $833 a month in interest alone. That is $833 every month just to stand still. The balance does not move.
Say you throw $1,000 a month at it, which is a big payment for most households. Only about $167 of that first payment touches the principal. At that pace, you are debt-free in about 9 years, and you will have paid roughly $58,300 in interest along the way. More interest than the original debt.
That is the trap. Minimum payments and even aggressive payments mostly feed the interest while the balance barely budges.
The other way to carry it
Now take that same $50,000 and move it into a second mortgage at around 4.99%:
- On a 25-year amortization: about $291 a month, with roughly $37,200 in total interest over the life of the loan.
- On a 15-year amortization: about $394 a month, with roughly $20,900 in total interest.
Compare that to the credit card: $1,000 a month for 9 years and $58,300 in interest, versus $394 a month for 15 years and $20,900 in interest. Lower payment, less total interest, and a fixed finish line.
Why does this work?
Two reasons. First, the rate is roughly a quarter of the credit card rate, because the loan is secured against your home. Second, a mortgage is structured to actually pay the balance down to zero, while a credit card is designed to let you revolve the balance forever.
The honest fine print
This is not free money, and it is not for everyone. A second mortgage is secured against your home, so missed payments put your house at risk in a way credit card debt does not. You need enough equity to qualify. And the golden rule: once the cards are cleared, do not run them back up. Consolidation without a spending plan just moves the problem.
Rates, terms, and qualification vary by lender and by your situation. The numbers above are an illustrative example, not a quote.
The bottom line
If you are paying 19.99% on a big balance while sitting on home equity, you are paying the most expensive possible price for debt you could be carrying far more cheaply. The new math is simple: same debt, smaller payment, less interest, real end date.
Wondering what this looks like with your balances? Send me a message and I will run your numbers, no obligation.
Daryl Johnson, Mortgage Agent Level 2 | Mortgage Architects | October 2026
Example assumes a $50,000 balance: credit card at 19.99% nominal annual rate, and a second mortgage at 4.99% nominal interest compounded semi-annually. Actual rates, payments, and qualification depend on the lender and your situation.