Employee or Contractor Across the Border: Two Countries' Tests, Two Withholding Regimes, and the Permanent Establishment Risk

Whether a cross-border worker is an employee or an independent contractor determines who withholds what, which country's payroll taxes apply, whether the worker can deduct expenses, and whether the paying company has created a taxable presence in the other country. Canada and the US apply different tests, each country's tax authority can reclassify a worker on audit, and a Canadian company with a US worker (or a US company with a Canadian one) can find itself with a permanent establishment it did not intend.

Full guides: A Canadian Company Hiring US Contractors: What You Withhold (Usually Nothing), What You File, and Where the Real Risks Sit · A US Company Hiring Canadian Contractors: the W-8BEN Instead of the 1099, and Why Remote Work in Canada Means No US Withholding

Key takeaways

• Canada's test: the CRA looks at the parties' intent and then at control, ownership of tools, chance of profit and risk of loss, and integration into the payer's business. An incorporated contractor working like an employee risks personal services business treatment.
• US test: the IRS looks at behavioral control, financial control, and the relationship of the parties. Some states apply stricter tests; California's ABC test presumes employment.
• Withholding on services: Canada requires 15% Regulation 105 withholding on fees paid to a non-resident for services performed in Canada, reducible by waiver. The US requires 30% withholding on payments to a non-resident alien for independent services unless a treaty exemption is claimed on Form W-8BEN (or Form 8233 for individuals).
• Permanent establishment: an employee or dependent agent in the other country can create a PE for the employer, making the employer's attributable profits taxable there. An independent contractor generally does not.
• Social security: the US-Canada totalization agreement assigns a worker to one country's system and prevents double CPP and FICA.

Canada's classification test

The CRA starts with what the parties intended and then tests whether the working relationship matches it. The factors from the Wiebe Door and Sagaz cases: does the payer control how, when, and where the work is done; who owns the tools and equipment; does the worker bear financial risk and have an opportunity for profit; and is the worker integrated into the payer's organization or running their own business. A worker with one client, set hours, the client's equipment, and no other customers is an employee whatever the contract says.

An incorporated worker adds a second risk: if the corporation's only business is providing one person's services to a client that would otherwise employ that person, the CRA can treat it as a personal services business, taxed at the full corporate rate without the small business deduction and denied deductions other than salary paid to the worker.

The US classification test

The IRS common law test groups the evidence into behavioral control (instructions, training, evaluation), financial control (investment, unreimbursed expenses, opportunity for profit or loss, payment method), and relationship (contracts, benefits, permanency, whether the services are a key part of the business). Form SS-8 asks the IRS to rule. States apply their own tests for state payroll and unemployment; California's ABC test treats a worker as an employee unless the hirer proves independence on all three prongs.

Withholding

Non-resident performing services in Canada. The Canadian payer must withhold 15% of the gross fee under Regulation 105 (plus 9% in Quebec) and remit it, regardless of whether the non-resident will ultimately owe Canadian tax. The non-resident can apply for a waiver in advance (based on the treaty's business profits article if no PE exists) or file a Canadian return to recover the excess.

Non-resident alien performing services in the US. The US payer must withhold 30% on payments for independent personal services performed in the US unless the payee provides a Form W-8BEN (entities: W-8BEN-E) claiming the treaty's business profits exemption, or, for individuals, Form 8233. A Canadian contractor with no US fixed base is exempt under Article VII; the form stops the withholding, and no 1099 is issued to a foreign payee who has provided a W-8BEN.

Employees. An employee working in the other country is subject to that country's payroll withholding unless a treaty exemption applies (Article XV: under $10,000, or under 183 days with a non-resident employer and no PE bearing the cost). Employers must register for payroll in the other country when the exemption does not apply.

Permanent establishment

Under Article V of the treaty, a company has a PE in the other country if it has a fixed place of business there, or a dependent agent who habitually concludes contracts on its behalf, or (under the services provision) employees present in the other country more than 183 days in a twelve-month period on a single project. A remote employee working from a home office in the other country can create a fixed-place PE. An independent contractor acting in the ordinary course of their own business does not. The PE consequence is that the employer's profits attributable to that PE are taxable in the other country, with corporate filings to match.

Worked example

A Toronto software company engages a developer in Austin. The developer works full time, exclusively for the company, on the company's systems, with set hours, and invoices monthly through an LLC.

• US classification. Behavioral and financial control point to employment; the IRS or Texas could reclassify. The company would owe employer payroll taxes and penalties.
• Canadian view. No Canadian withholding (services performed in the US); the company's payments are deductible.
• PE risk. If reclassified as an employee, the developer's Texas home office is a fixed place of business of the Canadian company: a US PE, Form 1120-F, and Texas franchise tax exposure.
• Fix. Either engage the developer through a US employer of record or US subsidiary as an employee, or restructure the engagement so the developer has multiple clients, own tools, and control over hours, making the contractor classification defensible.

Official sources

"Facts that provide evidence of the degree of control and independence fall into three categories: (1) Behavioral: Does the company control or have the right to control what the worker does and how the worker does his or her job? (2) Financial: Are the business aspects of the worker's job controlled by the payer? [...] The keys are to look at the entire relationship and consider the extent of the right to direct and control the worker." — Internal Revenue Service, Independent Contractor (Self-Employed) or Employee?, https://www.irs.gov/businesses/small-businesses-self-employed/independent-contractor-self-employed-or-employee

"The facts of the working relationship as a whole decide the employment status." — Canada Revenue Agency, Employee or self-employed? (RC4110), https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/rc4110/employee-self-employed.html

Practitioner note

The cross-border misclassification cost is not the payroll tax; it is the permanent establishment. A Canadian company that treats a full-time US worker as a contractor and is reclassified on audit has created a US taxable presence retroactively. We look at the engagement structure before the first invoice, and we default to an employer of record when the facts point to employment.

See also: Planning a move? See the Canada-to-Florida guide and browse every corridor by city, province, and state.

Next step

Fairlight prepares the worker classification analysis, the withholding and waiver filings on both sides, and the permanent establishment review for cross-border employers. See cross-border pricing or book a call.