April 2026 - Legal Update - Changes to HST For New Builds

Ontario’s newly expanded HST rebate framework offers new incentives for home buyers. The simplest explanation is that the revised HST rules have eliminated the 13% HST on new homes valued up to $1,000,000. For first-time buyers, an additional rebate of up to $50,000 seems to be layered on top, but only within a defined band of purchase price between $1MM and 1.5MM. This additional rebate for first-time buyers starts at $50,000 and declines at the rate of $0.10 for every dollar of purchase price above $1,000,000, reaching $0.00 in additional rebate at a purchase price of $1,500,000. Conceptually, this creates a sliding buffer that continues to offset tax otherwise payable as the purchase prices rise through that range. The crossover point, meaning the point at which the remaining rebate no longer fully offsets the HST, occurs at approximately $1,217,391. Up to that purchase price, the rebate structure appears to neutralize the tax burden in full for any first-time home buyer. Where the analysis becomes more complicated is in the treatment of purchase prices above $1,500,000. At that stage, the first-time buyer top-up has been fully exhausted, and only the base rebate of $130,000 remains. That base rebate is then reduced on a straight-line basis until it reaches a max rebate of $24,000 at a purchase price of $1,850,000, after which it remains fixed. This proportional reduction appears to be based on a linear decline across this $350,000 range between $1.5MM and $1.85MM. If one cares to trust the math of a lawyer, then the total possible reduction of $106,000 is the mathematical distance between $130,000 to $24,000. Given the total rebate reduction of $106,000 over the $350,000 interval between $1,500,000 and $1,850,000, this produces an effective clawback rate of approximately $0.302857 per dollar increase beyond $1.5MM. Applied to a $1,600,000 purchase, the excess over $1,500,000 is $100,000. Multiplying the clawback rate yields a reduction of approximately $30,286, resulting in a remaining rebate of roughly $99,714. In summary, first-time buyers benefit from a meaningful extension of rebate protection into the $1.0M–$1.5M range. However, once past $1.5M, the regime reverts to a steadily diminishing benefit that, while still material, becomes increasingly marginal relative to the purchase price. From a practical standpoint, small changes in purchase price can have measurable, but predictable, impacts on net tax exposure for purchases over $1.5MM. As always, this is not tax advice, and you must consult a lawyer and tax planner to understand whether you qualify. For real estate professionals advising clients on pre-construction agreements, having an awareness of total closing costs will add real value through precise modelling of HST obligations on closing. Michael Craig Liddiard, BA MA JD (905) 932-5437 [email protected] Liddiard Law Professional Corporation