Most Borrowers Plan to Prepay Their Mortgage and Then Never Do It
A mortgage broker surveyed 200 clients in 2024 who'd taken out mortgages the previous year. Eighty-seven percent said they planned to make extra payments within the first 12 months. Fourteen percent actually did.
That gap isn't a character flaw. It's friction.
Most Canadian mortgages let you prepay up to 15% or 20% of the original balance each year without penalty. Lenders advertise this as flexibility. Borrowers hear it as opportunity. The plan forms: save an extra $500 some months, throw a tax refund at the principal in April, maybe redirect a bonus in December. The math is appealing, a $400,000 mortgage at 5.5% paid down by an extra $5,000 annually saves roughly $34,000 in interest over 25 years and shaves three years off the amortization.
The execution is different. Life fills in. The car needs tires. A root canal costs $1,800. The vacation gets booked. The tax refund sits in the chequing account for six weeks, then migrates into groceries and daycare fees. By December, the mortgage balance is exactly where the amortization schedule said it would be, and the prepayment room resets unused on January 1.
This is where offset mortgages do something quietly effective. They remove the decision.
How the offset works
An offset mortgage links your chequing or savings account directly to your mortgage balance. Any money sitting in the linked account reduces the balance on which interest accrues. If your mortgage is $400,000 and you keep $8,000 in your chequing account, you only pay interest on $392,000. No manual transfer. No annual prepayment limit to track. No choice required at month-end.
The interest you don't pay has the same effect as a prepayment, but the cash stays liquid. You can spend it tomorrow if the furnace dies. The mortgage benefit happens automatically as long as the money sits there.
Most people do keep cash in chequing, not deliberately, but structurally. Paycheques arrive. Bills go out on different days. The balance fluctuates, and what's left at month-end usually just carries forward. That carryover is where the offset creates value.
A household carrying an average $6,000 monthly balance in their chequing account saves roughly $3,300 in interest annually on a $400,000 mortgage at 5.5%, without ever deciding to prepay. Over 20 years, that idle cash eliminates about $47,000 in interest and cuts 2.5 years off the mortgage. The household made zero extra payments. They just left normal cash flow in place.
Why manual prepayment plans break
The problem with discretionary prepayment isn't laziness. It's that you have to choose the mortgage over everything else, every time. That's a losing design.
Behavioral finance research on commitment devices shows that automating a savings behavior increases follow-through rates by 40% to 60% compared to voluntary action. The offset is a commitment device for mortgage prepayment. The system does the work. The borrower just lives normally.
Most lenders in Canada don't offer offset mortgages yet, they're common in the U.K. and Australia but rare here. When they are available, they typically carry a rate premium of 10 to 25 basis points over a standard variable mortgage. That premium is the cost of liquidity and automation.
For borrowers who genuinely will make disciplined annual lump sums, a traditional mortgage with prepayment privileges and a lower rate wins. For the 86% who intend to prepay and then don't, the offset turns intention into outcome without requiring a second decision.
The best prepayment strategy is the one that happens. Most don't. An offset mortgage assumes you won't remember, and builds the system accordingly.
A mortgage broker surveyed 200 clients in 2024 who'd taken out mortgages the previous year. Eighty-seven percent said they planned to make extra payments within the first 12 months. Fourteen percent actually did.
That gap isn't a character flaw. It's friction.
Most Canadian mortgages let you prepay up to 15% or 20% of the original balance each year without penalty. Lenders advertise this as flexibility. Borrowers hear it as opportunity. The plan forms: save an extra $500 some months, throw a tax refund at the principal in April, maybe redirect a bonus in December. The math is appealing, a $400,000 mortgage at 5.5% paid down by an extra $5,000 annually saves roughly $34,000 in interest over 25 years and shaves three years off the amortization.
The execution is different. Life fills in. The car needs tires. A root canal costs $1,800. The vacation gets booked. The tax refund sits in the chequing account for six weeks, then migrates into groceries and daycare fees. By December, the mortgage balance is exactly where the amortization schedule said it would be, and the prepayment room resets unused on January 1.
This is where offset mortgages do something quietly effective. They remove the decision.
How the offset works
An offset mortgage links your chequing or savings account directly to your mortgage balance. Any money sitting in the linked account reduces the balance on which interest accrues. If your mortgage is $400,000 and you keep $8,000 in your chequing account, you only pay interest on $392,000. No manual transfer. No annual prepayment limit to track. No choice required at month-end.
The interest you don't pay has the same effect as a prepayment, but the cash stays liquid. You can spend it tomorrow if the furnace dies. The mortgage benefit happens automatically as long as the money sits there.
Most people do keep cash in chequing, not deliberately, but structurally. Paycheques arrive. Bills go out on different days. The balance fluctuates, and what's left at month-end usually just carries forward. That carryover is where the offset creates value.
A household carrying an average $6,000 monthly balance in their chequing account saves roughly $3,300 in interest annually on a $400,000 mortgage at 5.5%, without ever deciding to prepay. Over 20 years, that idle cash eliminates about $47,000 in interest and cuts 2.5 years off the mortgage. The household made zero extra payments. They just left normal cash flow in place.
Why manual prepayment plans break
The problem with discretionary prepayment isn't laziness. It's that you have to choose the mortgage over everything else, every time. That's a losing design.
Behavioral finance research on commitment devices shows that automating a savings behavior increases follow-through rates by 40% to 60% compared to voluntary action. The offset is a commitment device for mortgage prepayment. The system does the work. The borrower just lives normally.
Most lenders in Canada don't offer offset mortgages yet, they're common in the U.K. and Australia but rare here. When they are available, they typically carry a rate premium of 10 to 25 basis points over a standard variable mortgage. That premium is the cost of liquidity and automation.
For borrowers who genuinely will make disciplined annual lump sums, a traditional mortgage with prepayment privileges and a lower rate wins. For the 86% who intend to prepay and then don't, the offset turns intention into outcome without requiring a second decision.
The best prepayment strategy is the one that happens. Most don't. An offset mortgage assumes you won't remember, and builds the system accordingly.
Read Next
Evan Siddall Returns to Federal Housing as Build Canada Homes Chair
Canada's Rental Incentives Are Creating an Ownership Vacuum
Canadian Rents Drop 4% to $2,037, But 'Stabilization' Still Means Unaffordable for Most
7 Ways to Build Credit in Canada When You're Starting From Zero