CMHC Warns Government Homebuyer Incentives Could Push Prices Higher Without 28,000 Extra Housing Starts Per Year

CMHC ran two scenarios against a baseline, both looking out to 2030. In the "limited" scenario, a hypothetical demand-side support reaches 20% of potential buyers and lowers their monthly mortgage payment by about 4%. In the "broader" scenario, the same 4% payment reduction reaches 70% of potential buyers. That reach distinction is the hinge of the modelling.

Under the limited scenario, roughly 17,000 additional households attain homeownership at the peak, but non-beneficiary buyers face a 0.6% increase in national average house prices by 2030 compared with the baseline, according to CMHC's analysis. The direct program cost is estimated at $2.7 billion to $4.3 billion, with another $1.6 billion in unintended price costs absorbed by unsupported buyers.

Under the broader scenario, the numbers scale non-linearly. About 76,000 new households form at the peak, 52,000 of them access homeownership, and non-beneficiary buyers see a 2.1% price increase by 2030. Direct spending climbs to $9.3 billion to $11.4 billion, with $2.1 billion in unintended costs layered on top.

The offsetting supply figure is the one that should anchor every policy discussion. CMHC frames the 7,800 and 28,000 numbers as annual increases of roughly 3% to 11% on top of Canada's current pace of housing starts. The gap between those percentages decides whether the policy is price-neutral or price-inflating.

A caveat matters here. CMHC stressed that the scenarios are generic and "do not represent forward guidance, financial advice or policy recommendations." The modelling illustrates how demand-side levers interact with supply constraints. It is not a forecast of any specific program in market today.

The mechanics are not complicated. "A basic principle of supply and demand shows that if demand increases without proportionate supply, prices will increase," Laberge wrote. What makes the dynamic acute in housing is the lag between the two sides.

Demand-side tools work fast. A tax rebate is legislated and delivered inside a budget cycle. A mortgage rule change takes effect on a set date. Buyers feel the purchasing-power uplift in weeks, sometimes days. CMHC adds a second amplifier — pent-up demand, or what economists call induced demand. High prices delay household formation. Young adults stay at home longer. Roommate arrangements stretch beyond their expiry. When affordability relief arrives, those households do not wait. They form quickly and start looking.

Supply does not move at that speed. New construction runs on permitting timelines, labour availability, and materials cycles measured in years rather than months. The machinery has also been slowing: Canadian construction productivity has declined by nearly 40% since 2001 on CMHC's own estimates, with Ontario responsible for most of the drop. Adding 28,000 starts a year on top of a baseline is not a line item on a spreadsheet. It is a structural expansion of an industry that has been getting slower, not faster.

When purchasing power increases before new homes arrive, competition for existing stock tightens and prices rise. Some of the buyers the policy was designed to help get priced out of the homes they were chasing. CMHC's modelling does not demonize demand-side tools — it quantifies the condition under which they succeed. Targeted programs with strict eligibility generate less induced demand and need less offsetting construction. Broad-based programs generate more and need much more. The design of the program, not just its headline generosity, determines the price impact.

The Canadian policy environment reads almost like a live stress test for CMHC's model. Multiple demand-side levers are operating at the same time, most of them concentrated on new construction or first-time buyers.

As of April 1, 2026, Ontario is removing the full 13% Harmonized Sales Tax for eligible buyers of new homes valued up to $1 million, delivering a maximum rebate of $130,000, according to the Government of Ontario. The province has positioned the rebate as working alongside the federal First-Time Home Buyers' GST rebate, allowing some buyers of new construction to stack federal and provincial tax relief inside a single transaction.

On the savings side, the First Home Savings Account lets eligible first-time buyers contribute up to $8,000 annually to a lifetime maximum of $40,000. Contributions are generally tax-deductible. Qualifying withdrawals, including the investment growth inside the account, come out tax-free. Every FHSA account that matures into a home purchase is, by CMHC's framework, additional demand arriving in the market with more tax-advantaged capital than the buyer would otherwise have had.

Insured mortgage rules have moved in the same direction. Starting August 1, 2024, the Department of Finance allowed 30-year amortizations on insured mortgages for first-time buyers of newly built homes, up from the previous 25-year cap. Subsequent changes broadened the rule to all first-time buyers and all buyers of new builds, permitted insured refinancing for homeowners adding secondary suites, and removed the mortgage qualifying rate floor for straight switches at renewal.

None of these programs match CMHC's generic scenarios one-to-one. Stacked together, they describe exactly the policy environment CMHC is modelling. Tax relief. Tax-advantaged savings. Expanded credit access. Each lifts demand. None of them, on its own, builds a home.

For a homeowner who already owns, the short-term math is friendly. Rising demand without matching supply tends to lift prices, and rising prices lift home equity. Families reviewing their balance sheet after a broad-based demand-side stimulus will often see it validated by higher assessed values.

The long-term math is less comfortable. In CMHC's price-to-income ratio projections, the base scenario sees affordability improve modestly over the decade, drifting from 5.29 in 2025 to 5.05 by 2030. The targeted intervention barely moves the line, ending at 5.08. The broader intervention holds the ratio at 5.16, giving back much of the expected improvement. Non-beneficiary buyers, in other words, face a measurably higher bar than they would in the status quo.

That bar has a face. It is the homeowner's adult child trying to form a household. It is the neighbour's kid saving for a first down payment. It is the teacher or tradesperson priced out of the community they work in. When CMHC says a broad-based intervention costs $2.1 billion in unintended price pressure on unsupported buyers, it is describing a transfer of affordability from the next generation of homeowners to the current one. Equity gains today are partly funded by higher prices tomorrow.

The reframe is simple. Existing homeowners who care about affordability for their children and communities should evaluate every new buyer-focused program against one question. Is the same government, at the same time, committing to the housing starts that make the program price-neutral for everyone else?

Against CMHC's benchmark, the direction of travel is not reassuring. The agency's broader affordability work estimates Canada needs roughly 3.5 million additional housing units by 2030 on top of what is already projected, just to restore affordability to early-2000s levels. The 7,800 to 28,000 annual starts needed to offset demand-side incentives sit on top of that structural gap, not inside it.

The contrast with current provincial reality is sharp. Ontario's own housing start forecast was revised down to 64,800 units in the 2026 budget, leaving the province roughly 30,000 units behind the pace required to hit its stated 1.5-million-home target. When a province cannot close its own supply deficit, the probability that it absorbs an additional 7,800 to 28,000 national starts on the margin, purely to neutralize incentive-driven demand, is not high.

Homeowners watching future policy announcements can apply a short litmus test. How targeted is the program — narrow eligibility or broad access? Does the announcement include a supply commitment, and is the pace credible? Are the construction numbers additive to the baseline forecast, or are they rebranded counts of projects already under way? Is the province or municipality implicated in delivery actually positioned to build? A program that answers yes to targeting and credible additional supply is aligned with CMHC's modelling. A program that does not is the shape Laberge is warning about.

The April 15 analysis closes with a line that deserves to travel with every buyer-side policy announcement for the rest of 2026. Demand-side supports and supply-side investment are not alternatives. They go "hand-in-hand." Canada is running one side of that equation much harder than the other right now, and CMHC has put a number on how large the gap can get before homeowners feel it in their own neighbourhoods.