Technology leaders spend years building equity, then often weeks deciding how to sell it. The term sheet arrives, the lawyers move fast, and the tax questions get squeezed into the final days. For founders whose lives straddle two countries, that order is backward.
A Toronto CTO with shares in a Delaware company, or a Seattle founder of an Ontario startup, faces two tax systems at the same exit. For leaders in that position, Canada U.S. Tax Planning belongs on the exit timeline as early as the cap table does. Treat this as general information and confirm details with a qualified Canada-US Border cross-border adviser.
Why Does Residence Matter More Than the Company’s Address?
Each country taxes mainly by who you are and where you live, not by the company’s address.
Canada taxes its residents on their worldwide gains. The United States goes further for its own citizens. The IRS says US citizens abroad generally file the same returns as people living in America. Their income test counts worldwide sources.
That creates the classic founder trap. A US citizen living in Vancouver may sell shares that qualify for a generous US exclusion. Canada does not follow that US rule, so the same gain can still be taxable on the Canadian return.
How Does the US Section 1202 Exclusion Work Now?
Section 1202 of the Internal Revenue Code lets eligible holders exclude gain on qualified small business stock. The 2025 tax law changed it for stock acquired after July 4, 2025. The statutory text of Section 1202 sets out these points:
1. Holding period now tiers the exclusion.
Newer stock earns 50% after 3 years, 75% after 4 years and 100% after 5 or more years.
2. Older stock follows the old rule.
Stock acquired on or before July 4, 2025 must still be held more than 5 years.
3. The per-issuer cap is higher.
It is $15,000,000 for newer stock and $10,000,000 for older stock, or 10 times the adjusted basis if greater.
4. The cap will be indexed.
The $15,000,000 figure rises with inflation for taxable years beginning after 2026.
5. The company must be small enough.
The aggregate gross assets test is now $75,000,000, up from $50,000,000.
6. The issuer must be a US company.
Only a domestic C corporation qualifies, and the shares must be acquired at original issue.
Point 6 rules out a lot of Canadian founders. Shares in an Ontario or British Columbia corporation are not domestic C corporation stock, so Section 1202 does not apply to them.
What Does Canada-US Border Lifetime Exemption Offer Instead?
Canada’s own relief is the lifetime capital gains exemption, or LCGE, and its tests are different.
The CRA capital gains guide sets the core conditions for qualified small business corporation shares:
- The company is a Canadian-controlled private corporation.
- At the time of sale, 90% or more of its asset value is used mainly in an active business in Canada.
- Throughout the 24 months before the sale, no one but you or a related person owned the share.
- Over those 24 months, more than 50% of its asset value met the active business test.
- You were resident in Canada throughout the year you claim the deduction.
For 2025, the CRA lists the LCGE at $1,250,000 for dispositions of qualifying property. A Finance Canada release dated September 15, 2026, refers to a limit of $1.275 million for eligible entrepreneurs. Founders should confirm the figure for the year of their own sale.
The same release confirmed that the proposed increase to the capital gains inclusion rate was canceled. The CRA guide gives the general inclusion rate for 2024 as one half.
How Do the Two Regimes Compare?
| Feature | US Section 1202 (QSBS) | Canadian LCGE |
| Eligible company | Domestic C corporation | Canadian-controlled private corporation |
| Holding test | 3 to 5 years, tiered, for newer stock | 24 months of ownership tests |
| Size or asset test | $75,000,000 gross assets | 90% active assets at sale, 50% over 24 months |
| Dollar limit | $15,000,000 or 10 times basis | $1,250,000 for 2025 |
| Who claims it | Taxpayers other than corporations | Individuals resident in Canada |
Photo by Vitaly Gariev on Unsplash
Neither relief carries over to the other country’s return. Each one only reduces tax in the country that grants it.
What Happens if a Founder Moves Before the Exit?
A move timed near a sale creates a second tax event. When you emigrate, the CRA treats most property as sold at fair market value on departure, then bought back at that value.
That deemed sale can include private company shares, since they are not on the CRA list of exceptions. Two numbers matter here:
- You can elect to defer the departure tax, but the election is due by April 30 of the year after you leave.
- If the deferred federal tax is more than $16,500, the CRA requires adequate security.
So a founder moving from Waterloo to San Francisco a year before an acquisition may face Canadian tax on growth to date. The later sale is then a US question, with Canada’s departure value as the starting point.
Questions to Raise Before Signing a Term Sheet
Leaders who follow pre-IPO investor meetings know how quickly a liquidity event can accelerate. A short checklist keeps the tax side from falling behind:
- Which country will I be resident in on the closing date?
- Is my company a domestic C corporation, a Canadian-controlled private corporation, or neither?
- When did I acquire each block of shares, and at what basis?
- Will a planned relocation trigger Canadian departure tax first?
- Is part of the price paid in buyer shares, and how does each country treat that?
Teams that run payroll across multinational businesses already think in jurisdictions. The founder’s own equity deserves the same discipline.
Exit Value Is Decided Before the Exit
The headline price on a sale is only half the story for a Canada-US Border founder. Residence, corporate form and share dates often decide how much of that price stays with the people who built the company.
Frequently Asked Questions
1. Can a Canadian Resident Use the US QSBS Exclusion?
Section 1202 is a US rule, so it only reduces US tax. The gain can still be taxable on the Canadian return.
2. Do Shares In a Canadian Startup Qualify for QSBS?
Generally not. Section 1202 requires stock in a domestic C corporation, and a company incorporated in Canada is not one. Canada-US Border founders usually look to the LCGE instead.
3. Is the LCGE Limit $1.25 Million or $1.275 Million?
The CRA lists $1,250,000 for 2025 dispositions. A Finance Canada release from September 15, 2026, refers to $1.275 million for eligible entrepreneurs. Check the official figure for the year of sale.
4. Does Moving to the US Before an Exit Avoid Canadian Tax?
Usually not on its own. Canada-US Border treats most property as sold at fair market value when you emigrate, so growth before the move can be taxed on departure. Deferral is possible, with security above $16,500 of federal tax.
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