Buy-Down Mortgage
Understand buy-down mortgages in Canadian real estate — how they work, their benefits, and when they’re used.
July 27, 2025
What is a Buy-Down Mortgage?
A buy-down mortgage is a loan where the interest rate is temporarily or permanently reduced through upfront payments made by the borrower or a third party.
Why Buy-Down Mortgages Matter in Real Estate
In Canadian real estate financing, buy-downs can make homeownership more affordable in the early years or help sellers/investors incentivize purchases.
Types:
- Temporary (e.g., 3-2-1 buy-down)
- Permanent (lower rate for full term)
Understanding buy-down mortgages helps buyers assess cost-benefit and long-term affordability.
Example of a Buy-Down Mortgage in Action
The builder offered a buy-down mortgage incentive, covering points to lower the buyer’s interest rate for the first three years.
Key Takeaways
- Interest rate lowered via upfront payment
- May be temporary or permanent
- Used to improve affordability
- Often funded by builders or sellers
- Requires cost-benefit analysis
Related Terms
- Fixed Rate Mortgage
- Adjustable-Rate Mortgage (ARM)
- Mortgage Broker
- Refinance
- Mortgage Term
Canadian respondents were more likely to expect an undersupply of development/redevelopment equity capital (63%) than debt capital (46%) in 2027. These are survey expectations, not measured financing volumes. Source: PwC and ULI, Emerging Trends in Real Estate 2027, pp. 136–137. Original chart.
Toronto census metropolitan area housing starts fell from 37,718 units in 2024 to 26,087 in 2025, a 30.8% decline (rounded to 31%). Starts measure construction begun, not completed homes. Source: CMHC, as cited in PwC and ULI, Emerging Trends in Real Estate 2027, p. 145. Original chart.
Illustrative calculation: a $4.5-million value ceiling versus income-based capacity of about $4.25 million at 4%, $3.62 million at 5% and $3.13 million at 6%. Assumes 50-year amortization and 1.15 debt coverage.
Source: Department of Finance missing-middle backgrounder and Budget 2026 Chapter 3, November 5, 2026. Fiscal-year funding starts are not home-completion dates.
