Canadian Contractor Working U.S. Job Sites: The Construction Permanent Establishment, State Contractor Licensing, and Withholding on U.S. Work

Construction is the one cross-border business the treaty addresses by name, and its rule is about time. The construction site rule: under the treaty (Article V(3)), a building site or a construction or installation project constitutes a permanent establishment if, but only if, it lasts more than twelve months (the treaty has no rule aggregating related enterprises' time to defeat contract-splitting, but contracts that form a coherent whole commercially and geographically are treated as one project under the OECD Commentary and the U.S. Model Technical Explanation); a Canadian contractor whose U.S. project lasts less than twelve months has no permanent establishment from that project, and its profits from the project are taxable only in Canada under Article VII — but the work is effectively connected U.S. business activity, so the contractor files a protective Form 1120-F with Form 8833 disclosing the treaty position (the Canadian company expanding to Florida guide); the clock runs from the start of work on the site (including preparatory work on site) until the work is completed or permanently abandoned, and interruptions (seasonal or weather) generally don't stop it; the services rule (183 days of presence) is a separate test that can apply to service elements. Over twelve months: a project exceeding twelve months is a U.S. permanent establishment from its start (from the first day of work, not the day the twelve months run out), so the contractor's profit from the project is taxable in the United States — Form 1120-F reporting the effectively connected income, the branch profits tax on after-tax profits not reinvested (5 percent under the treaty — the expansion guide), and estimated tax payments; many Canadian contractors with long U.S. projects form a U.S. subsidiary to hold the contract (the subsidiary taxed in the United States, the parent protected), at the cost of the subsidiary's own licensing and bonding. The client's withholding: a U.S. client paying a foreign contractor for services performed in the United States may withhold 30 percent unless the contractor provides a W-8BEN-E claiming the treaty exemption (the payments are U.S.-source — services performed in the United States — and the client is a withholding agent — the IRS's page); some clients — and some states — withhold regardless pending proof (several states run nonresident contractor programs — Connecticut, for example, requires the customer to withhold 5 percent of payments to a nonresident contractor that hasn't posted a guarantee bond of 5 percent of the contract price with the state); the contractor plans the W-8BEN-E and the state registrations before the first invoice. The states — not bound by the treaty: the state where the project sits has its own income tax nexus (a physical presence — the job site — is nexus in every state with an income tax), so the Canadian contractor files a state corporate income or franchise tax return on the project's income in that state, regardless of the federal treaty protection (states that start from federal taxable income can produce zero for a treaty-protected company, but states aren't bound by the treaty and a state that computes its own base can tax the project's income anyway), plus the state's sales and use tax on materials (the construction sales tax guide — the contractor as consumer of materials in most states), the state's unemployment and payroll registrations for its workers, and — in states with them — the gross receipts taxes; Florida has no personal income tax but does tax corporations (the Florida corporate income tax guide) — a Canadian corporation working a Florida job site has Florida corporate nexus. Contractor licensing — the gate: every state and many localities license contractors (general, electrical, plumbing, mechanical — the electrical entity guide's licensing layer), and a Canadian contractor must hold the license where it works — qualifying a licensed individual (a qualifier, often required to pass the state's exam), registering the Canadian corporation as a foreign entity in the state (the Florida annual report guide's foreign qualification), posting the license bond, and obtaining the local permits; working unlicensed voids the contractor's ability to enforce payment in many states (in Florida, section 489.128 makes a contract entered into by an unlicensed contractor unenforceable by that contractor, with no lien or bond claim for its work) and invites penalties. The workers — tax and immigration: Canadian employees working on the U.S. site need U.S. work authorization (a Canadian construction worker generally can't work on a U.S. site as a visitor — the TN categories don't cover most trades; an L-1B for an employee with specialized knowledge who has worked for the company for a continuous year in the past three — though an L-1B worker can't be placed at a client's site under the client's control — or an H-2B for temporary non-agricultural labor, which needs a U.S. labor certification and is subject to an annual cap; a B-1 visitor may install, service, or repair commercial or industrial equipment the Canadian company sold where the sales contract requires it, but the State Department's rule (9 FAM 402.2-5(E)(1)) excludes building or construction work other than supervising or training the workers who do it); U.S. income tax on their U.S. workdays unless the treaty's employment article exempts them (US$10,000 or less of U.S. employment income in the year, or 183 days or fewer in any twelve-month period with pay neither borne by a U.S.-resident employer nor borne by a U.S. permanent establishment — so a project that becomes a PE removes the exemption — the Canadian employer with U.S. employees guide); U.S. FICA unless a Totalization certificate of coverage keeps them in the CPP or QPP (the Quebec cross-border guide); and the state's income tax on their wages (most income-tax states tax nonresident employees from the first day of work, though some set withholding day thresholds — New York 14 days, Illinois 30 working days, Arizona 60 days). The Canadian side: the project's profit is active business income on the T2 (with a foreign tax credit for any U.S. or state tax — a state's income tax counts as a business-income tax under section 126(7), which includes taxes of a political subdivision of a foreign country), the U.S. dollars converted, and the workers' payroll continuing in Canada (with Canadian source deductions reduced for U.S. tax withheld only under a CRA letter of authority the employee requests on Form T1213). The bookkeeping: the project calendar with the site's start and expected completion (the twelve-month clock); the W-8BEN-E with the client; the protective Form 1120-F or the PE return; the state registrations (foreign qualification, contractor license, sales tax, payroll, income tax); the workers' immigration documents, day counts, treaty positions, and coverage certificates; the bond and the permits. The errors: a project that ran past twelve months without anyone tracking the clock (a retroactive PE); no state income tax return because "the treaty covers it"; working without the state contractor license (an unenforceable contract); workers on visitor entries; and the client withholding 30 percent for want of a W-8BEN-E.

Key takeaways

• The treaty's construction rule: a building site or installation project lasting more than twelve months is a U.S. permanent establishment — retroactively from its start; shorter projects are protected from federal tax (file a protective Form 1120-F).
• Long projects often go into a U.S. subsidiary — taxed in the United States, with its own licensing and bonding.
• The client withholds 30 percent on U.S.-performed services without a W-8BEN-E treaty claim; some states run their own nonresident contractor withholding.
• States aren't bound by the treaty: the job site is income tax nexus, plus sales and use tax on materials, payroll registrations, and gross receipts taxes where they exist.
• The state contractor license is the gate — qualify a licensed individual, register as a foreign entity, post the bond; unlicensed work can make the contract unenforceable.
• Canadian workers need U.S. work authorization, may owe U.S. and state tax on U.S. workdays, and need a coverage certificate to stay out of FICA.

The Canadian contractor's U.S. project file

Project calendar and the twelve-month clock. W-8BEN-E to the client; state contractor withholding programs. Protective Form 1120-F or the permanent establishment return. State: foreign qualification, contractor license and qualifier, bond, permits, sales and use tax, payroll, income or franchise tax. Workers: immigration status, day counts, treaty positions, coverage certificates, state withholding. Canadian side: T2 with foreign tax credits. The twelve-month clock is the one line that changes the federal answer.

Worked example

A Quebec specialty glazing contractor wins a curtain-wall subcontract on a Miami office tower: on-site work scheduled for nine months. Before mobilizing: the Canadian corporation registers in Florida as a foreign corporation, qualifies its project manager (who passed Florida's exam) as the licensed qualifier for a Florida specialty contractor license, posts the bond, and provides the general contractor a W-8BEN-E claiming the treaty (no PE — under twelve months); its eight Canadian installers enter on L-1B status as specialized-knowledge employees (immigration counsel confirmed the conditions — a continuous year with the company in the past three, specialized knowledge of its proprietary curtain-wall system, and supervision by the company's own foreman rather than the general contractor), each with a Retraite Québec certificate of coverage (QPP, not FICA) and a U.S. tax analysis (crews rotated so no installer is in the United States more than 183 days in any twelve-month period; paid by the Canadian employer and not borne by a U.S. PE — treaty-exempt from U.S. income tax; Florida has no personal income tax). The project's federal profit is treaty-protected — a protective Form 1120-F with Form 8833; Florida corporate income tax nexus from the job site — a Florida return on the Florida-apportioned income (Florida starts from federal taxable income — zero for the treaty-protected company — and has no add-back for treaty-exempt income), and Florida sales and use tax on the glazing materials it imported and installed (as the contractor-consumer). When delays pushed the project to fourteen months, the desks flagged the clock in month ten: the project became a U.S. permanent establishment from its start, and the corporation filed a Form 1120-F reporting the project's profit with the branch profits tax, its installers' treaty exemption fell away from the project's start (their wages were now borne by a U.S. permanent establishment), so their U.S. workdays became taxable in the United States, and the Canadian return claimed the foreign tax credit.

Official sources

The IRS explains: “Generally, NRA withholding describes the withholding regime that requires 30% withholding on a payment of U.S. source income and the filing of Form 1042 and related Form 1042-S.” — Internal Revenue Service, NRA withholding, https://www.irs.gov/individuals/international-taxpayers/nra-withholding

IRS Publication 597 notes: “Treaty provisions are generally reciprocal (the same rules apply to both treaty countries). Therefore, Canadian residents who receive income from the United States may also refer to this publication to see if a treaty provision affects their U.S. tax liability.” — Internal Revenue Service, Publication 597 (10/2015), Information on the United States–Canada Income Tax Treaty, https://www.irs.gov/publications/p597

Practitioner note

Construction is the one cross-border business the treaty names: a job site that lasts more than twelve months is a U.S. permanent establishment from its first day, and a shorter one is protected federally — but never from the state where the site sits, its contractor licensing board, or the immigration rules for the crew. Our desks track the twelve-month clock from mobilization, put the W-8BEN-E with the client before the first invoice, register and license the contractor in the state, sort the installers' work status, treaty positions, and coverage certificates, and file the protective Form 1120-F — and flag the clock months before a delay turns a protected project into a U.S. branch.

See also: For related guidance, see choosing between a U.S. branch and a U.S. subsidiary; and browse every cross-border tax topic guide, organized by situation.

Next step

Fairlight Accounting is a cross-border accounting and tax practice with a U.S. Tax Desk and a Canadian Tax Desk. Our U.S. Tax Desk and Canadian Tax Desk handle Canadian contractors on U.S. projects — treaty construction permanent establishment analysis and twelve-month tracking, protective and permanent establishment Form 1120-F filings, client and state withholding documentation, state contractor licensing and foreign qualification, state income and sales tax compliance, crew immigration, treaty, and social security coordination, and Canadian foreign tax credits. See pricing or book a call.