The HST Rebate on New Rental Homes in Ontario

When Ottawa announced it was “removing the GST on new rental housing,” a lot of Ontario homeowners reasonably assumed that included the basement suite they were planning. It doesn’t, and finding that out after you’ve built is an expensive way to learn it.

The relief is real and generous — arguably the single largest federal support for rental construction in decades. It is also gated in a way that excludes almost every single-suite project. This guide explains what the rebate does, where the gate sits, how Ontario’s HST split works, and what changed from the older rebate that many articles still describe.

What is the enhanced GST/HST rental rebate?

The enhanced rebate relieves builders of GST/HST on newly constructed multi-unit residential rental properties. It was introduced to make purpose-built rental construction viable after years of the tax treatment making it marginal.

Under PwC Canada’s summary, the relief covers the federal component of GST/HST, and the provincial component in Nova Scotia, Newfoundland and Labrador, and Ontario — with Prince Edward Island capped at a maximum of $35,000 per unit. The Real Property (GST/HST) Regulations were finalised on 27 June 2024, and the rebate operates under subsection 256.2(3.1) of the Excise Tax Act.

The timing conditions:

• Construction (or conversion) must begin after 13 September 2023 and before 1 January 2031
• The project must be completed by 31 December 2035

On when construction “begins”: the CRA has stated that construction of a residential complex generally begins when excavation work relating to the complex begins. Site preparation, obtaining permits, demolition and environmental remediation may not count as commencing construction — a distinction that matters if your start date sits near the boundary.

The four-unit gate

This is the decisive detail, and where most content misleads.

To be “prescribed property” qualifying for the enhanced rebate, the residential complex must be a multiple unit residential complex (MURC) that contains either:

• four or more stand-alone apartments, each with a private kitchen, bath and living area, or
• 10 or more residential units

And all or substantially all — 90% or more — of the units must be “qualifying residential units” held for long-term rental to an individual as their primary place of residence.

Three consequences follow, and they catch people out:

One suite doesn’t qualify. A homeowner adding a basement apartment, garden suite or laneway house has one new unit. Even counting the main house, that’s two. The gate is four. There is no partial version.

A duplex or triplex doesn’t qualify either. The gate is absolute at four — it isn’t scaled or prorated.

Owner-occupancy can be a problem at exactly four units. If 90% or more of units must be held for long-term rental, then in a four-unit building, one owner-occupied unit is 25% of the total — which does not leave 90% for rental. Whether and how that affects a specific project is a question for an accountant before you finalise the plan, not after.

A condominium complex is excluded from the MURC definition, so a project structured for individual condo sale doesn’t qualify either.

This four-unit line is one of the main reasons a fourplex pencils differently from a duplex — it’s the smallest building that can reach this relief. Our fourplex guide covers the other thresholds that converge at four units.

Ontario’s provincial portion

Ontario homeowners and small developers get a better outcome here than most of the country, and it’s worth understanding why.

Ontario’s HST is a combined tax with a federal component and a provincial component. Under the enhanced rebate, there should be no GST/HST payable for qualifying residential units in a MURC in Ontario — both components relieved.

That is not the case everywhere. The enhanced rebate delivers full relief in the non-HST provinces (Alberta, British Columbia, Manitoba, Quebec, Saskatchewan) and territories, and in the HST provinces of Nova Scotia, Newfoundland and Labrador, and Ontario. Prince Edward Island is the exception — there the provincial component remains payable on unit value above $350,000, because the provincial rebate is capped at $35,000 per unit.

So for a qualifying Ontario project, the rebate is worth the full HST on the construction — which on a four-unit build is a substantial figure. It is arguably the most valuable single measure available to an Ontario small developer, and it is worth structuring a project to qualify for rather than discovering afterwards that it doesn’t.

What about B.C. and the other provinces?

British Columbia is a non-HST province, so the enhanced rebate delivers full relief on the GST for qualifying projects. But note something separate that catches B.C. builders out: B.C. charges 7% PST on many construction inputs, and that is a provincial sales tax on materials — an entirely different tax from the GST, and not relieved by this rebate.

So a B.C. project gets the GST relief but still carries the PST on materials. An Alberta project carries neither, because Alberta has no provincial sales tax at all. This is a real cost difference between provinces that has nothing to do with the rebate itself.

Alberta, Manitoba, Quebec, Saskatchewan and the territories all receive the federal relief on qualifying projects.

The old rebate and its $450,000 cliff

A great deal of published content still describes the previous rental rebate, which is a materially worse deal and no longer the relevant one for qualifying new construction. It’s worth knowing what it was, because the difference explains why the enhancement mattered so much.

Under the old New Residential Rental Property rebate, a builder could claim:

• 36% of the federal component of GST/HST paid on each unit, to a maximum of $6,300 per unit
• with the rebate phased out on units with a fair market value exceeding $350,000, and
• no rebate at all for units valued above $450,000
• plus 75% of the provincial component of HST in Ontario, to a maximum of $24,000 per unit — with no provincial-component rebate in the other HST provinces

That $450,000 ceiling is the precision point most articles get wrong. It wasn’t a reduced rebate above the threshold — relief reached zero. In Ontario markets where almost no new unit is worth under $450,000, the federal portion of the old rebate was effectively unavailable, which is precisely why purpose-built rental construction stalled.

The enhanced rebate removed the phase-out and the fair-market-value cap entirely for qualifying projects, taking relief from 36% to 100% of the federal component. That is the change.

How to claim, and when to involve an accountant

The rebate is claimed by the builder, and the GST/HST it relieves is the tax arising on either:

• a deemed sale by the builder under the “self-supply” rules in section 191 of the Excise Tax Act, or
• the purchase of a newly constructed rental property

Each unit must also satisfy the qualifying conditions: held for making exempt supplies of residential accommodation; first use reasonably expected to be an individual’s primary place of residence under one or more leases for at least one year; and the unit must be a self-contained residence with a private kitchen, private bath and private living area — or a suite or room in a residence for students, seniors or individuals with a disability.

One important exclusion. The rebates apply to tax arising on a self-supply or a purchase. Where GST/HST becomes payable under the “change of use” rules instead — for example, an owner converting existing short-term accommodation units to long-term rental — no rental rebate is available. Converting the use of an existing building is not the same as constructing new rental housing, and the rebate follows construction.

When to get an accountant involved: before you start, not after. The rules here are genuinely complex, the qualification conditions interact, and several of the traps — the four-unit gate, the 90% test, the change-of-use exclusion, the definition of when construction began — are structural decisions you make at the outset. By the time you’re filing, the answer is already determined.

Our tax and development charge guide covers the broader tax picture, and our financing page covers how projects at this scale get funded.

Find out whether your project can reach four units

Because the gate sits at four units, the most valuable question for an Ontario project is often whether your lot can carry four rather than three — a difference that changes the tax treatment entirely.

HouseLyft’s free property assessment establishes what your lot permits and whether four units is realistic. If your project is already at that scale, get qualified is the right starting point for the financing conversation.