Taxes on a Pre-Construction Assignment Sale: GST/HST, Income Tax and the Flipping Rule
Since 2022, almost every new-build assignment is taxable for GST/HST; the profit is usually taxed in full as business income, not as a half-taxed capital gain
Is the profit on an assignment sale subject to GST/HST, and is it taxed as a capital gain or business income?
Both layers apply. Layer one — GST/HST: According to the CRA (2022), since May 7, 2022, almost all assignment sales of newly built or substantially renovated housing are taxable transactions subject to GST/HST (13% in Ontario), with the deposit you paid the builder excluded from the taxable amount, so tax effectively falls on the markup/profit. Layer two — income tax: the assignment profit is usually treated as business income taxed in full, not as a half-taxed capital gain — especially under the 2023 flipping rule, where anything held under 365 days is deemed business income outright.
Sources: Canada Revenue Agency — Notice 323 (2022, GST/HST on assignments), "Report your real estate income," and the Residential Property Flipping Rule (2023); Ontario HST is 13%. Reviewed June 2026.
“Flip the assignment, pocket a profit — no tax, since I never moved in” is one of the most expensive misconceptions I hear. After two federal changes in 2022 and 2023, the tax on assignments is a different world: GST/HST is almost unavoidable, the profit is usually fully taxed as business income, and a short hold runs straight into the flipping rule. Here are all three layers, so you can price the tax in before you sign the assignment — not get reassessed with interest at tax time.
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Layer one: GST/HST — almost always due since 2022
The deposit is excluded: tax falls on the markup
Layer two: the profit is usually business income, not a capital gain
ℹ️Holding 365+ days isn’t automatically a capital gain. The flipping rule is the floor — under 365 days is always business income. Even past it, the CRA can still treat the profit as business income based on your intention at purchase. The two tests stack.
Layer three: the 2023 flipping rule is a hard line
In practice: estimate before signing, keep records, get help
Frequently Asked Questions
I made $80K assigning a pre-con — roughly how much tax?
Two pieces: GST/HST — 13% in Ontario on the markup (your builder deposit is excluded, subject to conditions); and income tax — in most cases the $80K is included in full as business income at your marginal rate. The exact amount depends on your income and facts — have an accountant model it before you sign.
Can I report assignment profit as a capital gain (half taxed)?
Usually not. According to the CRA, assignment profit is generally reported as business income in full; held under 365 days, the flipping rule deems it business income. Only rare genuinely capital-nature situations differ — get professional advice.
Who pays the GST/HST — buyer or seller?
Generally the assignor (the original buyer) collects and remits it to the CRA. If the assignor is a non-resident, the assignee must self-assess and pay it directly to the CRA.
If I hold more than 365 days, am I safe from business-income treatment?
Not necessarily. The flipping rule is just the hard floor (under 365 days = always business income). Past 365 days, the CRA can still treat the profit as business income based on your intention at purchase and the surrounding factors. It’s not a free pass.
Arthur Zhao
Real Estate Broker · FRI · ABR · SRS · PSA · MCNE · E-PRO · CLHMS & GUILD Elite · REAIS
VP & Branch Manager, Bay Street Group Inc.
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