Pre-Construction Condo Assignment Sales in Ontario: The Complete Buyer and Seller Guide
Builder consent, deposit math, and the 2022 CRA GST/HST rule that catches most people off guard
What is a pre-construction condo assignment sale, and how is it different from a normal resale?
An assignment sale is when the original buyer transfers their rights and obligations under the Agreement of Purchase and Sale (APS) they signed with the builder to a new buyer, before the project closes. You are not selling the home itself (it often is not built and title is not yet in your name) — you are selling the contract. That is why builder consent is required, and why, since May 7, 2022, GST/HST applies to assignments of new housing.
Source: CRA GI-120 / Notice 323 (2022)
Assignment sales are everywhere in the GTA. Some people assign because their financing fell through and they cannot close; others assign to lock in a paper profit and exit before the building is finished. It sounds as simple as selling a contract, but it pulls in builder consent, how the deposit is repaid, and a tax trap that catches a lot of people: since 2022 the CRA treats new-housing assignments as taxable for GST/HST, and the profit can be taxed as business income rather than a capital gain. Here is what both the assignee (buyer) and the assignor (seller) need to understand.
→
→
→
→
1. What actually gets transferred
Start by separating two milestones on most projects: interim occupancy (you move in but do not own yet) and final closing / registration (title is registered in your name). An assignment normally happens before final closing — what you transfer are the rights and obligations under the APS, not a registered property. Because the thing being sold is a contract, ordinary resale habits do not apply, and step one is always to re-read the contract.
💡 An assignment transfers the contract you signed with the builder, not the home. That makes the builder an unavoidable party: if the APS does not permit it and the builder does not consent in writing, there is no deal.
2. Why people assign
In my deals the motive usually falls into one of two buckets, and that motive often shapes how the tax side is characterized.
They cannot close
The most common reason: financing that was fine at signing no longer works at closing years later — rates moved, the appraisal came in low, or income or status changed and the mortgage will not fund. Rather than default, lose the deposit, and risk being sued for the shortfall, the buyer assigns to a new buyer to cut their losses.
They want to cash out the profit early
The other bucket is investment-driven: the market rose while the building was still going up, and the assignor wants to realize the paper gain before final closing instead of funding a large balance and holding long term. This motive is exactly the one most likely to be characterized by the CRA as a profit-seeking business activity — which matters for tax, as I explain below.
⚠️I always tell clients the first step is reading the contract and getting written builder consent — not negotiating price. I have seen APSs that flat-out prohibit assignment, or builders that will not approve one while they are still selling. Agree on a price and then get stuck at the builder gate, and you have wasted the effort and may be in breach.
3. Builder consent and the assignment fee
Not every project allows assignment. Some agreements prohibit it outright; those that allow it attach conditions. Before you do anything, have your lawyer read these lines carefully:
- Is assignment permitted — what does the assignment clause say, and are there timing or sales-phase restrictions (builders often bar assignments while they are still selling their own inventory).
- Written builder consent — almost always required; without it the assignment is not valid.
- Assignment fee — an administrative fee charged by the builder, often in the low thousands, and typically subject to HST on top.
- Marketing / MLS restrictions — many builders forbid publicly listing an assignment, which limits your buyer pool and your price.
4. The deposit and occupancy math
The assignment price usually breaks into two parts: (1) repayment of the deposit the assignor already paid the builder (pre-construction deposits commonly run 15–20% of the price, sometimes higher for non-resident buyers), and (2) the profit — the spread between the original contract price and the new assignment price. That means the assignee needs a large amount of cash up front: they buy out the assignor’s deposit, pay the profit spread, and then still have to fund the final closing balance and mortgage on their own. If the assignment happens after interim occupancy has begun, the occupancy fee (an interim payment resembling rent, made up of interest, estimated taxes and maintenance) also has to be sorted out between the parties.
💡 The assignee carries the heaviest cash burden: deposit repayment + profit spread + builder assignment fee + HST + the future closing balance and mortgage. Model the full cash flow to the end before you sign anything.
5. The tax core: CRA’s GST/HST rule since 2022
This is the part where people lose the most money, so confirm your own situation with an accountant and lawyer.
Assignments of new housing are now taxable
According to the CRA (2022, Federal Budget / GI-120, Notice 323), effective May 7, 2022, all assignment sales of newly constructed or substantially renovated residential housing are taxable for GST/HST — regardless of the assignor’s intent (personal use or investment) and regardless of whether they are GST/HST-registered. The old I was just going to live there, so it is not a business argument no longer exempts the assignment from GST/HST.
Tax applies to the fee/profit, not the deposit repayment
According to the CRA (2022), for assignment agreements entered into on or after May 7, 2022, GST/HST applies only to the assignment fee (the profit portion) — not to the repayment of the deposit the assignor originally paid the builder. Example: at Ontario’s 13% rate, a 100,000 dollar profit carries roughly 13,000 dollars of HST on the profit; the deposit repayment is not taxed. (Note: agreements signed before May 7, 2022 follow different rules and may tax the entire assignment amount, so the signing date matters.)
The assignor may have to register, collect and remit
According to the CRA (2022), as the supplier the assignor is generally responsible for registering, collecting the GST/HST from the assignee, and remitting it to the government. Do not assume the builder or a lawyer handles this automatically — it is the assignor’s own compliance obligation, and missing it can mean assessments plus interest later.
⚠️Do not guess the tax characterization. The I am just living there defense no longer exempts you from GST/HST after the 2022 rules, and whether the profit is a capital gain or business income can double the tax. Get a written opinion from a licensed accountant on your own facts before signing — this article is not tax advice.
6. Business income or capital gain?
Beyond GST/HST (a consumption tax), the profit faces a second question under the income tax rules that decides how much you actually pay:
- Capital gain — only half the profit is taxable, so the burden is lighter.
- Business income — the full profit is taxable, a noticeably heavier hit.
A widely held view is that because the new rules define assignments as taxable supplies under the GST/HST regime, that generally implies a commercial activity — which under the Income Tax Act tends to point toward business income treatment. The CRA weighs factors such as your intention, frequency of transactions, holding period, and evidence of personal use. Someone assigning to cash out early, who flips pre-construction contracts often, faces the highest risk of business-income treatment. Have a licensed accountant characterize your specific facts — this is a flag, not tax advice.
7. Extra risks for the buyer (assignee)
Beyond the cash burden, the party taking over often overlooks these:
- New housing HST rebate eligibility — Ontario new-home buyers can claim an HST new housing or rental rebate when the unit is a primary residence or long-term rental; but if the assignor is treated as a builder or a pure investor, that rebate eligibility may already be lost. Who ultimately gets the rebate depends on who completes the final closing and how the home is used, so ask before you sign and do not bake the rebate into your cost model by default.
- Builder warranty (Tarion) — new-home warranty follows the final owner; the assignee should confirm they can properly register as the warranty beneficiary and take over the inspection and 30-day / 1-year warranty milestones after closing.
- Financing and appraisal — you mortgage and appraise against today’s assignment price; if the appraisal at closing comes in below that price, you cover the gap in cash.
8. Extra risks for the seller (assignor)
Selling the contract does not necessarily set you free: your contractual liability to the builder often is not fully released until the final closing completes — if the assignee fails to close, the builder may still come back to you. Add the GST/HST collection-and-remittance duty and the chance your profit is taxed as business income, and the assignor’s compliance and residual exposure is real. When signing the assignment agreement, have your lawyer spell out who bears what if the assignee defaults.
💡 Bottom line: an assignment is not a sell the contract and walk away deal. The builder gate, the deposit cash flow, the post-2022 GST/HST, and the business-income-vs-capital-gain question are four hurdles that each can change your real return. Both sides should have a lawyer and accountant run the numbers before signing.
Pre-Construction Buying Guide →The Ontario Selling Blueprint →Ontario Mortgage Guide →
Frequently Asked Questions
Do I always need the builder’s consent to assign?
In almost all cases, yes. You are transferring the contract you signed with the builder, and the assignment clause in that contract governs whether and on what terms you can assign. Nearly every builder requires written consent and charges an assignment fee (usually plus HST). Some agreements prohibit assignment entirely or allow it only at certain stages. Have your lawyer review the clause before you start.
Is the profit on an assignment subject to GST/HST?
According to the CRA (2022), since May 7, 2022 assignments of new housing are taxable. For agreements signed on or after that date, GST/HST applies only to the assignment fee (the profit portion), not to the deposit repaid to the assignor. Ontario’s rate is 13%. The assignor is generally responsible for registering, collecting and remitting that tax.
Is my assignment profit taxed as a capital gain or business income?
It depends on how the CRA characterizes your intent and conduct. A capital gain taxes only half the profit; business income taxes the full amount. Assigning to cash out early, and flipping pre-construction contracts frequently, raises the risk of business-income treatment. The CRA weighs intention, frequency, holding period and evidence of personal use, so have a licensed accountant assess your specific case.
As the buyer taking over, how much cash do I need?
Typically four pieces: repaying the assignor’s deposit (pre-construction deposits often run 15–20% of the price), the profit spread, the builder’s assignment fee plus HST, and the future closing balance and mortgage. Almost all of the cash pressure sits with the assignee, so map the entire cash flow before you sign.
Can I still get the new housing HST rebate after an assignment?
It depends on who completes the final closing and whether the home is a primary residence or long-term rental. Ontario new-home buyers can claim the HST new housing or rental rebate when they qualify, but if the assignor is treated as a builder or pure investor, that eligibility may already be lost. Do not assume the rebate is part of your cost — confirm before signing.
Arthur Zhao
Real Estate Broker · FRI · ABR · SRS · PSA · MCNE · E-PRO · CLHMS & GUILD Elite · REAIS
VP & Branch Manager, Bay Street Group Inc.
Get expert answers on buying, selling, and renting in the GTA
Discover more from GTA Real Estate Broker | Arthur Zhao
Subscribe to get the latest posts sent to your email.
