Assignment Sale in Ontario: How It Works, HST and Tax

This guide is general information for educational purposes only. It is not legal, tax or financial advice. Speak with a qualified lawyer, accountant or tax professional about your situation.

How an Ontario assignment sale works: builder approval, 13% HST with a written deposit exclusion, and income-tax rules for contracts held under 365 days.

For Toronto buyers, investors and rental owners considering an assignment: The short answer: an assignment is the sale of your contract with the builder before the home closes. Builder approval depends on the contract. Ontario HST is 13% on the assignment consideration, excluding qualifying deposit reimbursement stated in writing. Income-tax treatment depends on the holding period, exceptions and facts.

The assignor is the original buyer who sells the contract; the assignee is the buyer who steps in. Below is how I approach the mechanics, the tax and the risks.

How does an assignment sale work in Ontario?

When you buy pre-construction, you sign an agreement of purchase and sale (the "APS") with the builder and pay deposits over time. You have not taken title to the unit yet. You have a contractual right to buy it at closing.

In an assignment, you sell that right. The assignee typically reimburses the deposits you have paid the builder and may pay an additional premium. That premium is a gross gain before costs, not necessarily your net profit.

The assignee then closes with the builder at the original purchase price. The deposits are credited toward that price. The difference between the assignment consideration, excluding HST, and the reimbursed deposits is the gross premium before costs.

Do you need the builder's consent, and what does it cost?

The CRA explains that builder approval and assignment conditions may apply, and builders may charge a fee. I would check the APS for permission, timing, consent, fees and required paperwork before planning an assignment.

I recommend reviewing the assignment clause before signing the original APS.

Two checks matter most. Have your lawyer confirm that any required consent has been obtained, and whether the assignment documents expressly release you from obligations to the builder.

What does the assignee pay in land transfer tax?

The assignee takes title at closing and generally pays Ontario land transfer tax on registration. Ontario's Ministry of Finance states that on an assignment, the value of consideration includes the consideration for the assignment, the purchase price in the agreement assigned, and the value of extras and upgrades.

Toronto also imposes municipal land transfer tax in addition to Ontario's tax, subject to applicable exemptions. HST is excluded from Ontario's land-transfer-tax consideration. I recommend having a lawyer model both taxes before pricing an offer.

Is HST charged on an assignment sale?

Yes. Since May 7, 2022, all assignment sales of newly constructed or substantially renovated residential housing are taxable for GST/HST purposes.

The rule is in section 192.1 of the Excise Tax Act. HST (the harmonized sales tax, which is 13% in Ontario) applies to the assignment consideration, minus the amount solely attributable to reimbursing a deposit paid under the builder APS, but only if the assignment agreement states that part in writing.

Without that wording, the deposit reimbursement remains taxable.

According to the CRA's notice on the measure, the assignor is generally responsible for collecting and remitting the tax. The agreement should state whether the price is "plus HST" or "HST included" so the parties can calculate their payments and proceeds. I insist on that wording being explicit.

How is assignment profit taxed in Canada?

Income tax is separate from HST, and here timing matters a great deal.

What is the residential property flipping rule?

Under subsections 12(12) to 12(14) of the Income Tax Act, a "flipped property" includes a right to acquire a housing unit in Canada that you held for less than 365 consecutive days, subject to life-event exceptions. Rights already treated as business inventory are outside this definition and follow ordinary business-income rules.

A pre-construction purchase contract is a right to acquire a home. Profit on a flipped property is deemed business income, so the full net profit is included in income; a business loss on a flipped property is deemed nil.

The exceptions cover dispositions reasonably occurring because of, or in anticipation of, specified events: death, a related person joining your household or you joining theirs, threats to personal safety, serious illness or disability, eligible relocation, involuntary employment termination, insolvency, and destruction or expropriation. The statute specifies whose circumstances qualify.

Marriage or common-law breakdown also qualifies where the taxpayer has lived separate and apart from their spouse or partner for at least 90 days before the disposition. An exception removes the automatic flipping treatment; it does not guarantee capital-gain treatment.

What if you held the contract for at least 365 days?

Reaching 365 consecutive days does not make the gain a capital gain automatically. It simply means the deeming rule does not apply. The CRA can still treat the profit as business income based on your intentions and history, for example if you bought to resell or assign several contracts.

If the gain is genuinely on capital account, section 38 of the Income Tax Act includes one half of it in income. On a large assignment, the difference between those two outcomes is significant, which is why I ask clients to document why they bought before they ever sell.

Does the Underused Housing Tax apply?

For current years, no. The CRA confirms that after the Budget 2025 Implementation Act, No. 1 received royal assent on March 26, 2026, owners do not need to file a return or pay the underused housing tax for 2025 and subsequent calendar years. Filing obligations for 2022 to 2024 remain.

What does the math look like on an assignment?

Here is a hypothetical. An investor signed for a $1,600,000 Toronto condominium and has paid $320,000 in deposits. Eight months later, an assignee agrees to pay $420,000: $320,000 to reimburse the deposits and $100,000 of profit. The HST rate is Ontario's 13%, and the price is quoted plus HST.

Item	Deposit stated in writing	Deposit not stated
Assignment price	$420,000	$420,000
Deposit excluded	$320,000	$0
Amount subject to HST	$100,000	$420,000
HST at 13%	$13,000	$54,600

One drafting choice moves the HST by $41,600.

For income tax, assume the investor is an individual, no life-event exception applies, and the right is not already business inventory. The eight-month holding period triggers the flipping rule: full net profit is included in income. If instead the gain qualified as capital, half would be included. I would have an accountant confirm deductible costs and the applicable tax rate.

The builder's contract price remains $1,600,000. Crediting the $320,000 deposit leaves $1,280,000 before other adjustments and taxes. The assignee must also budget for Ontario and Toronto land transfer taxes. I recommend a lawyer and accountant confirm the final figures.

What are the main risks?

Financing at closing. Property value affects the mortgage amount available. If the valuation does not support the requested loan, additional funds or revised financing may be needed.
Release terms. Ask your lawyer to confirm whether you are released from obligations to the builder and what happens if the assignee defaults.
Delays and changes. Occupancy and closing dates can move. Review the APS and its addendum for permitted delays and closing adjustments, including any development charges.
Tax characterization. Misjudging business versus capital treatment, or missing the HST deposit wording, can reduce your proceeds.

Before relying on an assignment exit, I would consider whether a buyer will accept the price you need. I covered that dynamic in Pre-Construction in 2026: Distress, Assignments, and the Bill C-4 Reset.

What this means for you

Luxury buyer (assignee). I would assess an assignment against the building's availability and actual completion schedule. I underwrite it on the all-in cost, including the assignment premium, HST if passed on, land transfer tax on the full consideration and closing adjustments, against comparable resale. The end-user view I set out in Investor Liquidation and the End-User Calculus applies here.

Investor (assignor). Read the assignment clause before you sign, track your 365-day date, and get the deposit reimbursement stated in writing. Price your exit on after-tax proceeds, not the headline number.

Rental owner. If you plan to close and lease instead, compare that path with an assignment on the same after-tax basis. Ask an accountant to compare the income-tax and new-home rebate treatment of each path; see Policy Tailwinds: Ontario HST Exemption and Bill C-4.

Frequently asked questions

Can I assign my pre-construction condo without the builder's permission?

Have your lawyer review the assignment clause. Builder approval, fees and conditions depend on the APS; obtain any required consent before proceeding.

Who pays the HST on an assignment sale?

The assignor is generally responsible for collecting and remitting it to the CRA. Who economically bears it depends on whether the agreement says "plus HST" or "HST included."

Is HST charged on the deposit I get back?

Not if the assignment agreement states in writing the part of the price that reimburses your deposit. Without that wording, HST applies to the full assignment price.

Does the flipping rule apply if I held the contract more than a year?

The automatic flipping rule generally applies to rights held less than 365 consecutive days, subject to life-event exceptions. After that, the CRA can still find business income based on the facts, so speak with your accountant.

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