Who this is for
- Canadian-resident individuals buying a US operating business
- Canadian corporations buying US assets, shares or LLC interests
- Canadian buyers investing alongside US owners
Not covered here
- Detailed Form 8594 allocation and seller-tax due diligence
- Ongoing branch-versus-subsidiary operations and profit repatriation
- State-specific filings, sales taxes and successor liability
- Legal, immigration and foreign-investment advice
- US real estate acquisition withholding and detailed exit-tax calculations
- US estate tax on a non-resident owner's US-situs shares or assets
Should I buy assets, shares or an LLC interest?
An asset purchase generally gives the buyer new US tax costs for the assets purchased. A share purchase generally gives the buyer a cost in the shares while the target keeps its existing asset costs; certain elections can change that result (IRS: basis of assets; Form 8023 instructions).
| Purchase | What changes for the Canadian buyer |
|---|---|
| Operating assets | The named buyer becomes the operator and borrower; the US price allocation determines each asset's tax cost |
| Corporate shares | The buyer owns the target; the target continues to own its assets and its S or C tax status, and a C corporation's loss carryovers can be limited after an ownership change (Form 1120 instructions) |
| LLC interest | Often an asset purchase for US tax, while Canada generally sees corporate shares; check elections and owners before and after closing |
The agreement's label does not settle the tax result. A single-member LLC is disregarded for US income tax, so buying all its interests is generally treated as buying its assets (26 CFR 301.7701-2; IRS: LLC classification). So is one buyer's purchase of all interests in a partnership-classified LLC; buying only a continuing partnership interest differs (IRS: Form 8594 exceptions; Rev. Rul. 99-6). Canada generally sees corporate shares, so one purchase can give a US asset cost and a Canadian share cost.
A joint section 338(h)(10) election is open only where the sellers are S corporation shareholders, a selling consolidated group or a selling affiliate. A C corporation owned by individuals leaves only the buyer's section 338(g) election, and the target recognizes gain on the deemed sale. Either election goes on Form 8023, is irrevocable and is due by the 15th day of the 9th month beginning after the month of the acquisition date (Form 8023 instructions; 26 CFR 1.338-2(d)).
For Form 8594 mechanics, old tax debts, an owner's personal liability for payroll tax after closing and seller-return checks, use Buying a US business.
Should I buy personally, through my Canadian company or through a US company?
The right buyer depends on whose money funds the purchase, who needs the later cash and whether US partners will invest. Choose the ultimate owner and operating buyer separately: an individual includes dividends from a non-resident corporation in income (Income Tax Act, section 90), while a Canadian corporation may deduct part or all of a dividend from its foreign affiliate, depending on the affiliate's surplus (section 113).
- Your personal money: buying assets directly makes you the operator for tax purposes; holding shares, of the target or of a new US corporation, puts a US company between you and the business. US shares held personally are US-situated assets for estate tax, which this page does not cover (IRS: nonresident estate tax; Settling an estate across the border).
- Your Canadian corporation's money: buying assets directly makes it the US operator; owning a US corporation instead brings the dividend deduction and foreign-affiliate reporting. Taking company money out to buy personally adds a Canadian dividend or shareholder-loan question.
- A new US LLC: decide its US tax status first. A default LLC does not give a Canadian buyer the same tax treatment in both countries.
- A new US C corporation: it buys assets or shares and files its own corporate return. You or your Canadian corporation owns it, creating separate owner reporting and distribution questions.
Model operating tax, payments to the ultimate owner and the eventual sale together; the entity with the fewest opening filings need not have the lowest total tax. For branch-versus-subsidiary operations and bringing profits home, see Canadian business expanding into the US.
What does each buyer choice file in the US and Canada?
Filings follow the taxpayer that owns and operates the business. Buying shares through a Canadian corporation does not, by itself, make that corporation the operator of the target's US business. The table assumes a Canadian-resident buyer who is not a US citizen or US tax resident, a US operating business, and US companies that are non-resident in Canada. Its operating-return rules come from the Form 1040-NR instructions, Form 1120-F instructions and Form 1120 instructions.
| Buyer and purchase | US federal filings | Canadian filings or income treatment |
|---|---|---|
| You buy and operate assets personally | Form 1040-NR if engaged in a US trade or business, including where treaty relief is claimed | Business income on your T1 under Canadian rules |
| Your Canadian corporation buys and operates assets | Form 1120-F if engaged in a US trade or business; possible branch profits tax and Form 5472 for reportable related-party transactions | Business income on its T2 under Canadian rules |
| You or your Canadian corporation buys C corporation shares | Target files Form 1120; check Form 5472. Share ownership alone does not create the operating-return obligation above | Owner checks how dividends from the US company are taxed in Canada, and Form T1134 |
| A new US C corporation buys assets or shares | Buyer files Form 1120; check Form 5472. A corporate target generally keeps its own return | Canadian owner checks Form T1134, including indirect affiliates, and owner-level income rules |
| A solely Canadian-owned single-member US LLC buys and operates assets without a corporate election | Individual owner: Form 1040-NR; corporate owner: Form 1120-F. LLC: Form 5472 attached to a pro forma Form 1120 (a cover return with only identifying details) when it has reportable transactions | Canada generally sees a corporation; check foreign-affiliate reporting and income rules |
US branch profits tax (30% by statute) applies to a dividend-equivalent amount even if nothing is paid home. For an eligible Canadian corporation the treaty caps it at 5% and allows a cumulative C$500,000 earnings allowance (Form 1120-F instructions; treaty, Article X(6)).
A nonresident individual with no US wages subject to withholding generally files Form 1040-NR by June 15 for a calendar year, and a foreign corporation with a US office generally files Form 1120-F by the 15th day of the fourth month after year-end. A late return generally forfeits deductions and credits unless filed within 16 months (individual) or 18 months (corporation) of the due date, subject to exceptions (Form 1040-NR instructions; 26 CFR 1.874-1(b); 26 CFR 1.882-4(a)(3)).
Form 5472 generally applies, when there are reportable related-party transactions, to a US corporation that is at least 25% foreign-owned, a foreign corporation engaged in a US trade or business, or a foreign-owned one-owner LLC that the US ignores. It is filed with the corporation's income tax return by that return's due date, including extensions. A penalty of US$25,000 applies to each failure to file properly or keep records, with more if it continues after IRS notice (IRS: Form 5472 instructions).
A non-resident corporation generally becomes your foreign affiliate when your equity percentage is at least 1% and your percentage plus related persons' totals at least 10% (section 95). Form T1134 is generally due 10 months after the reporting owner's year-end, subject to exemptions (CRA: foreign-affiliate returns).
A US-incorporated company managed from Canada can be resident in Canada under the central management and control test. The treaty tie-breaker generally makes a company created only under US law resident only in the US, and section 250(5) then deems it non-resident in Canada (CRA: corporate residence; Canada–US treaty, Article IV; section 250). For continuing filings, see Canadian owner of a US corporation.
Can a Canadian buy an S corporation's shares?
A Canadian can acquire the shares, but a nonresident alien or a company cannot preserve the target's S status. US tax status decides, not Canadian citizenship: a US citizen, including a dual citizen living in Canada, or a US resident alien can qualify (26 USC 1361(b)(1)(C); IRS: S corporation requirements).
The S election generally terminates when the corporation stops qualifying, including when an ineligible shareholder acquires shares (26 CFR 1.1362-2(b)). The company is then taxed as a C corporation, and the closing year splits into an S period and a C period. Buying the assets, or buying the shares with a joint section 338(h)(10) election, gives the buyer new asset costs when the target is an S corporation; the election treats the target as selling its assets and liquidating for US tax. The election needs a corporate buyer making a qualified stock purchase, and every S shareholder must consent, including those who do not sell. The instructions expressly address foreign purchasing corporations, so a Canadian corporate buyer is not automatically excluded (Form 8023 instructions).
An individual cannot make a qualified stock purchase, but a new US corporation the individual forms can if it is treated as the purchaser; a later merger into the target or liquidation can show it was not (26 CFR 1.338-3(b)(1)). Because the election is irrevocable (26 CFR 1.338(h)(10)-1), agree on seller cooperation and responsibility for the deemed-sale tax before fixing the price. The qualified-stock-purchase test and the section 336(e) alternative for a sale to an individual are in Buying a US business (26 CFR 1.336-1).
Why does Canada treat a US LLC differently?
The US classifies an LLC by its number of members and any election; Canada does not follow the US election (IRS: LLC classification).
| LLC | US view | Canada's view |
|---|---|---|
| One owner, no election | Ignored: the owner reports the income | Generally a corporation |
| Two or more owners, no election | Partnership | Generally a corporation |
| Corporate election filed | Corporation | Corporation |
The CRA's published position is that a US LLC is generally a corporation for Canadian tax purposes, based on its legal characteristics. That is an administrative position, so confirm it for the specific LLC (CRA: foreign entity classification).
The owner can be taxed on business income in the US while Canada sees corporate shares and later dividends. Article IV(7) can deny treaty benefits where the countries' treatment differs; do not assume ordinary treaty rates apply through a default LLC (Canada–US treaty).
For the complete filing and double-tax analysis, see Canadian owner of a US LLC.
How is the price split, and what cost do I get in each country?
An asset deal requires a supported price allocation; a share deal generally gives the Canadian buyer a cost in shares. Keep the owner's share cost separate from the target's asset costs. Buying all interests in an LLC can need both, because the countries classify it differently.
A US asset allocation follows the residual method, and inventory, equipment and goodwill produce different deductions; the allocation classes and Form 8594 are in Buying a US business. A section 338 election treats the target as selling its assets and a new target as buying them, and the allocation is reported on Form 8883 (Form 8023 instructions; Form 8883 instructions).
Canadian share cost generally includes acquisition costs that belong in the adjusted cost base. Record the US-dollar price and Canadian-dollar equivalent at acquisition, with exchange-rate evidence; do not translate original cost at a later sale-date rate (CRA: capital gains guide). A corporation that has elected to calculate its Canadian tax in another currency follows different rules (section 261).
If a Canadian taxpayer buys assets directly, prepare a separate Canadian tax-cost and deduction schedule. US allocation and election rules do not establish Canadian deductions by themselves.
How should I fund the purchase, and what do later payments trigger?
Money reaches the business as your equity, a loan or seller financing, and each is taxed differently. A loan to you, a loan to your US subsidiary and a capital contribution are different transactions, so name the borrower, lender and equity owner before moving money.
| Funding source | What needs review |
|---|---|
| Your personal money | Shares versus a documented loan; preserve currency and transfer records |
| Canadian company lends to you | The loan is added to your income unless an exception applies, such as repayment within one year after the end of the corporation's tax year in which the loan was made outside a series of loans and repayments; a loan that escapes the inclusion can carry a taxable low-interest benefit (section 15; section 80.4) |
| Canadian company lends to a US company | Ownership, use of proceeds, commercial interest terms, section 17 and US related-party reporting |
| Bank financing | Which taxpayer borrows and uses the money; deductibility and interest limits |
| Seller financing | Price versus interest, repayment terms and US imputed-interest rules |
If your Canadian company lends to a non-resident, including your own US company, and the debt stays outstanding for more than a year without enough interest, section 17 can add interest to the Canadian company's income. Its controlled-foreign-affiliate exception depends on conditions including use of funds; common ownership alone is insufficient (section 17). Loans and interest between related companies may have to be reported on Form 5472, and the US can limit the interest deduction (IRS instructions). Seller notes with inadequate interest can trigger rules that treat part of the price as interest (IRS: installment sales).
For an ordinary US corporation paying an eligible Canadian beneficial owner, treaty dividend withholding is capped at 5% where the owner is a company owning at least 10% of voting stock, and 15% otherwise. Interest generally is taxable only in the lender's residence country. Check treaty eligibility, hybrid entities, profit-linked interest and other exceptions (Articles X, XI and XXIX A). These are limits on US tax at the source, not the owner's total tax across both countries. The US company must withhold on the dividend and is itself liable for tax it fails to withhold (26 USC 1461). To claim a treaty rate, the owner gives the US company Form W-8BEN (individual) or W-8BEN-E (entity) (W-8BEN instructions; W-8BEN-E instructions; W-forms for a Canadian corporation).
What if the buyers include Canadians and Americans?
What each owner files depends on that owner's US status, not citizenship alone. A US citizen living in Canada, or a Canadian who becomes a US resident, can hold S shares if the other S conditions are met; a Canadian resident who is not a US person cannot. A US partner does not remove that problem or the LLC classification mismatch.
A partnership-classified US LLC generally files Form 1065. US business income allocated to foreign partners can require Forms 8804 and 8805 and withholding of 37% on a non-corporate partner's share or 21% on a corporate partner's, paid in installments even without distributions, so allow for the cash. A partnership that fails to pay can be liable for the tax, penalties and interest (IRS: partnership withholding; who must withhold).
Collect each owner's tax residence, citizenship and any corporate ownership first. For a US company with a co-owner outside the US, see US company with a foreign co-owner; for a Canadian partner in a US LLC, see Canadian partner in a US LLC.
What should I settle before signing the letter of intent?
Settle the buyer, purchase type and funding route before fixing tax assumptions in the letter of intent, and put classification and election questions ahead of the price calculation.
- Identify every buyer: entity type, tax residence, US status, ownership and where management decisions will occur.
- Compare the transactions: assets, shares or LLC interests; seller willingness to make elections; proposed allocation and each country's tax costs.
- Trace the money: cash source, actual borrower, loan terms, guarantees and seller note. Separate shareholder borrowing from subsidiary funding.
- Assign closing responsibilities: election signatures and deadlines, foreign-reporting information and opening tax-cost records.
Ask the seller's side for formation documents, the ownership chart, draft agreements, financial statements, asset tax-cost schedules, federal and state returns, and election evidence, including any S election and LLC classification election. Use Buying a US business for detailed seller-tax and successor-liability review. State registrations, sales taxes and local liabilities need checks in the operating states; federal treatment does not settle them.
I already closed in my own name or the wrong entity. What can change?
A completed purchase may still be reorganized, but moving assets or shares is a new transaction requiring tax review. Establish what actually closed and any remaining election window before transferring anything.
A qualifying corporate acquisition may still permit a section 338 election until the 15th day of the 9th month beginning after the month of the acquisition date (Form 8023 instructions). An individual cannot make a qualified stock purchase, and shares later moved into a corporation in a section 351 exchange are not "purchased" (26 CFR 1.338-3(b)(1); 26 USC 338(h)(3)). An eligible LLC can elect corporate classification, effective no more than 75 days before filing, but the election can create deemed contributions or liquidations with tax consequences, and a further change is generally barred for 60 months (26 CFR 301.7701-3(c) and (g)).
A US property-for-stock transfer may qualify for section 351 deferral if its conditions are met (IRS: corporations). Canada needs its own analysis: related-party transfers below fair market value can produce deemed sale proceeds under section 69. A section 85 election defers an eligible transfer only to a taxable Canadian corporation, generally a company incorporated in Canada and resident there, so it is not available for a transfer to a US corporation (section 85; section 89).
Calculate the proposed transfer's tax in both countries before implementing it; relief in one country does not establish relief in the other.
Example
Illustrative only. Purchase amounts are in US dollars; Canadian share cost is in Canadian dollars. No tax or deductions are calculated.
A Canadian-resident individual considers paying US$1,000,000 for a US operating business using personal funds. Assume a C corporation target, no debt and no acquisition expenses.
- Direct share purchase: the buyer pays US$1,000,000 for all shares. At an illustrative exchange rate of C$1.40 per US$1, initial Canadian share cost is C$1,400,000. Assume the target's existing tax cost in all its assets is US$100,000; it does not increase merely because its shares changed hands.
- Assets through a new US C corporation: the individual funds the US buyer, which purchases the assets. Assume a supported allocation of US$200,000 to inventory, US$300,000 to equipment and US$500,000 to goodwill. The company starts with US$1,000,000 of asset costs: inventory is recovered as it is sold, goodwill is amortized, and equipment may qualify for a first-year deduction (IRS: Publication 946). The individual separately records the investment in the new company.
If the seller instead has an S election or wants an LLC-interest sale, redo the classification and election analysis before treating these options as equivalent.
Different for you?
These situations change the buyer, tax treatment or filing obligations:
- S corporation target, mixed owners, Canadian-company debt or a purchase needing restructuring: bring the letter of intent or signed agreement, returns, ownership chart, price split and funding plan to cross-border tax.
- Choosing a structure before finding a target: see US business for a Canadian resident.
- US citizenship or a green card: see Americans living in Canada.
- Ownership outside foreign-affiliate reporting, or other foreign property: check T1135 and related filings in Foreign property and affiliate reporting.
- An American buying a Canadian business: see American buying a Canadian business.
- A Canadian target: see Buying an existing Canadian business.
- The business owns real estate: see How a Canadian should own US property.
- You plan to run it from the US or move there: US tax residency can change your filings and S eligibility; see Moving from Canada to the US. Licences, foreign-investment reviews and immigration advice are outside this page.
- Planning an exit: see Selling a US business from Canada.
Figures on this page
| Figure | Value | Source |
|---|---|---|
| Section 338 and 338(h)(10) election filing deadline (Form 8023) Applies to both the buyer's own section 338 election and the joint section 338(h)(10) election; the election is irrevocable. Special rules can apply to foreign purchasing corporations. | The 15th day of the 9th month beginning after the month of the acquisition date | eCFR: 26 CFR 1.338-2(d) and 1.338(h)(10)-1(c) Checked |
| Branch profits tax rate Section 884(a) tax on a foreign corporation's after-tax US business earnings not reinvested in the US business (the dividend equivalent amount); a treaty may lower or change it. | 30% | IRS: Instructions for Form 1120-F, Section III Checked |
| Canada–US treaty ceiling for branch tax Ceiling on additional tax on earnings attributable to a permanent establishment, subject to treaty eligibility | 5% | Department of Finance Canada: Canada–US tax convention, Article X(6) Checked |
| Canada–US treaty branch earnings allowance Canadian-dollar allowance reduced by amounts claimed by the company or an associated company for the same or a similar business | C$500,000 | Department of Finance Canada: Canada–US tax convention, Article X(6)(d) Checked |
| Calendar-year Form 1040-NR deadline without wages subject to withholding Following the tax year, before applicable extensions or weekend and holiday adjustments | June 15 | IRS: Publication 519, When and Where To File Checked |
| Form 1120-F filing date with a US office General filing date; special rule for a June 30 fiscal year-end | The 15th day of the fourth month after year-end | IRS: Instructions for Form 1120-F Checked |
| Nonresident return filing period to claim deductions After the original Form 1040-NR due date, without regard to extensions; earlier IRS notice rule may apply and IRS waiver may be available | 16 months | IRS: Nonresident aliens, real property located in the US Checked |
| Usual Form 1120-F filing window to preserve deductions and credits Measured from the return due date; exceptions and earlier IRS notice rules can apply | 18 months | IRS: Foreign corporation Form 1120-F filing responsibilities Checked |
| Foreign ownership that makes a US corporation a Form 5472 reporting corporation At least this share of vote or value held by one foreign person, directly or indirectly, at any time in the tax year. A single-member LLC wholly owned by one foreign person is treated as such a corporation. | 25% | IRS: Instructions for Form 5472 Checked |
| Form 5472 penalty for failure to file or keep records For tax years beginning after December 31, 2017. Per reporting corporation, per tax year. A substantially incomplete Form 5472 counts as a failure to file. IRC 6038A(d)(1); Treas. Reg. 1.6038A-4(a). | US$25,000 | IRS: Instructions for Form 5472 Checked |
| Foreign affiliate test: your own equity percentage A non-resident corporation is a foreign affiliate if your equity percentage (direct, and indirect through non-resident corporations for T1134 reporting under s. 233.4(2)(a)) is at least this, and the group test is also met | 1% | Income Tax Act, s. 95(1), foreign affiliate Checked |
| Foreign affiliate test: you plus related persons Total equity percentage of you and each person related to you must be at least this | 10% | Income Tax Act, s. 95(1), foreign affiliate Checked |
| T1134 filing deadline After the reporting entity's taxation year or fiscal period ends | 10 months | Income Tax Act, subsection 233.4(4) Checked |
| Shareholder loan repayment exception deadline Subsection 15(2.6) applies when the corporation is the lender and repayment is not part of a series of loans or other transactions and repayments | One year after the end of the corporation's tax year in which the loan was made | Income Tax Act, subsection 15(2.6) Checked |
| Canada–US treaty dividend withholding rate, company owning 10% or more of voting stock Article X(2)(a): beneficial owner is a company owning at least 10% of the voting stock of the paying company | 5% | Department of Finance Canada: Canada–United States Tax Convention (consolidated) Checked |
| Canada–US treaty voting-stock ownership for the lower dividend rate Article X(2)(a): the beneficial owner must be a company owning at least this share of the paying company's voting stock | 10% | Department of Finance Canada: Canada–United States Tax Convention (consolidated) Checked |
| Canada–US treaty dividend withholding rate, all other cases Article X(2)(b): rate on dividends when the beneficial owner is not a company holding at least 10% of the voting stock, including an individual | 15% | Department of Finance Canada: Canada–United States Tax Convention (consolidated) Checked |
| Section 1446 withholding rate for non-corporate foreign partners Highest rate under section 1, applied to effectively connected taxable income allocable to the partner; a lower rate may apply to preferential income such as long-term capital gain with documentation. | 37% Tax year 2026 | IRS: Instructions for Forms 8804, 8805 and 8813 (01/2026) Checked |
| Section 1446 withholding rate for corporate foreign partners Highest rate under section 11(b), applied to effectively connected taxable income allocable to the partner. | 21% | IRS: Instructions for Forms 8804, 8805 and 8813 (01/2026) Checked |
| Form 8832 retroactive effective-date limit An entity classification election generally cannot take effect earlier than this before filing | 75 days | IRS: Form 8832 and instructions Checked |
| Form 8832 repeat-election restriction A further classification change is generally restricted for this period after the prior election took effect; an initial election effective on formation is excepted | 60 months | IRS: Form 8832 instructions, lines 2a and 2b Checked |
Primary sources
- IRS: Publication 551, Basis of Assets
- IRS: Instructions for Form 8023
- IRS: Instructions for Form 8594
- Justice Laws: Income Tax Act, section 90
- Justice Laws: Income Tax Act, section 113
- IRS: Instructions for Form 1040-NR
- IRS: Instructions for Form 1120-F
- IRS: Instructions for Form 1120
- IRS: Instructions for Form 5472
- Justice Laws: Income Tax Act, section 95
- CRA: Information returns relating to foreign affiliates
- Justice Laws: Income Tax Act, section 250
- CRA: Residency of a corporation
- IRS: S corporations
- eCFR: 26 CFR 1.1362-2
- eCFR: 26 CFR 1.338(h)(10)-1
- eCFR: 26 CFR 1.336-1
- eCFR: 26 CFR 1.338-3, qualified stock purchase requirements
- eCFR: 26 CFR 301.7701-2, business entities
- IRS: Instructions for Form 8883
- Justice Laws: Income Tax Act, section 89
- IRS: Nonresidents with US assets and estate tax returns
- GovInfo: 26 USC 1361, S corporation defined
- IRS: Revenue Ruling 99-6
- IRS: Limited liability company classification
- CRA: Technical News No. 38, foreign entity classification (archived)
- Department of Finance Canada: Canada-US tax convention, consolidated
- CRA: Capital Gains, adjusted cost base and currency conversion
- Justice Laws: Income Tax Act, section 261
- Justice Laws: Income Tax Act, section 15
- Justice Laws: Income Tax Act, section 80.4
- Justice Laws: Income Tax Act, section 17
- IRS: Publication 537, Installment Sales
- IRS: Partnership withholding
- IRS: Who must withhold for foreign partners
- eCFR: 26 CFR 301.7701-3
- IRS: Instructions for Form W-8BEN
- IRS: Instructions for Form W-8BEN-E
- IRS: Publication 542, Corporations
- Justice Laws: Income Tax Act, section 69
- Justice Laws: Income Tax Act, section 85
- eCFR: 26 CFR 1.338-2, time and manner of the election
- GovInfo: 26 USC 338, certain stock purchases treated as asset acquisitions
- eCFR: 26 CFR 1.874-1, deductions of nonresident alien individuals
- eCFR: 26 CFR 1.882-4, deductions of foreign corporations
- GovInfo: 26 USC 1461, liability for withheld tax
- IRS: Publication 946, How To Depreciate Property
About this guide
Edited and reviewed by Di Lu, CPA on . It explains general rules for the tax year shown. It is not advice for your situation.
Changes
- : First published.