I'm a Canadian Working Remotely for a US Company. Who Taxes Me?

Canada taxes you, first and mostly. Tax on employment income follows where the work is physically performed, not where the employer sits, so a Canadian resident working from a home office in Canada owes Canadian tax on the whole paycheque and usually owes the US nothing on it at all. The live questions are narrower than people fear: whether you’re an employee or a contractor, what happens on the days you actually work inside the US, and what your US employer owes Canada, which is the part almost nobody answers.

Who is this page for, exactly?

You live in Canada, you kept living in Canada, and a US company pays you, as an employee or a contractor, for work you do mostly from a Canadian desk. This page also assumes you aren’t a US citizen or green-card holder, because either of those changes the US side completely. If you physically drive to a US workplace, that’s a different fact pattern with its own rule, covered in the Windsor to Detroit commuter guide. If you’re about to move to the US, start with the TN first-year guide instead. If part of your pay is RSUs or options, the equity slice has its own two-country mechanics in the cross-border RSU guide.

The decision map: what happens, in what order?

Five questions decide the whole file, and they go in this order: residency first, because your ties didn’t move and Canada taxes worldwide income; classification second, because employee and contractor run on different machinery from here on; then your US workdays, because any at all trigger a treaty check; then the employer’s Canadian obligations, which exist whether or not anyone set them up; and last the edge questions, PE and state and GST/HST. Each row of the map is worked through further down the page.

Step	The question	What decides it	Forms that follow
1	Are you still a Canadian tax resident?	Residential ties: home, spouse, dependants; the payer’s country isn’t a significant tie	T1, worldwide income
2	Employee or independent contractor?	The facts of the working relationship as a whole	Payroll and T4, or invoices and W-8BEN
3	Any workdays physically in the US?	Sourcing follows the place of performance; the treaty then decides whether the US may tax the US slice	Possibly a US nonresident return for the US slice
4	What does the employer owe Canada?	ITA 153(1)(a) withholding, Reg 102, CPP and EI, and the limits of RC473 certification	Canadian payroll program account, source deductions, T4
5	Anything at the edges?	Employer PE exposure, your state question, GST/HST if you’re a contractor	Fact-specific

Does working for a US company make me a US taxpayer?

No, not by itself. Your Canadian tax residency runs on your residential ties, and an employer’s country isn’t one of the significant ties, so taking the job doesn’t, on its own, move where you’re resident. As a Canadian resident you owe Canadian tax on your worldwide income, including every dollar this job pays. On the US side, pay for work physically performed in Canada is foreign-source income to a nonresident alien, and the US generally doesn’t tax a nonresident alien’s foreign-source compensation, so the ordinary result for a fully remote year is no US tax and no US return for this income.

“An income tax shall be paid, as required by this Act, on the taxable income for each taxation year of every person resident in Canada at any time in the year.”

That’s ITA section 2(1). The residency side sits in Income Tax Folio S5-F1-C1, which lists the ties that “will almost always be significant residential ties” as your dwelling place, spouse or common-law partner, and dependants. Notice what isn’t on that list: your employer. If your ties are in doubt for other reasons, the Canadian residency guide runs the full framework.

The US sourcing rule is just as blunt. IRC 861(a)(3) makes compensation US-source only when the labor or services are “performed in the United States”, and IRC 862(a)(3) makes “compensation for labor or personal services performed without the United States” foreign-source. Your kitchen table in Kelowna is without the United States. Two withholding rules then follow the same line. The 30% withholding regime in IRC 1441(a) reaches items of income only “to the extent that any of such items constitutes gross income from sources within the United States”. And on the wage side, Treas. Reg. 31.3401(a)(6)-1(b) says remuneration paid to a nonresident alien “for services performed outside the United States is excepted from wages and hence is not subject to withholding.” The tax base itself runs on the same line: IRC 871 taxes a nonresident alien on US-source income and on income effectively connected with a US trade or business, and on the fully remote facts this page assumes, this pay sits outside both heads, since IRC 864(b) keys the trade-or-business definition for services to performance “within the United States”.

The treaty backs the domestic rules rather than fighting them. Under Article XV(1), as replaced by the Fifth Protocol, remuneration derived by a resident of Canada from an employment “shall be taxable only in that State unless the employment is exercised in the other Contracting State.” Employment exercised at a Canadian desk isn’t exercised in the US, so for the fully remote pattern the treaty gives the US no claim at all. The days you do work in the US are the exception, and they get their own section below.

Am I an employee or an independent contractor, and who decides?

The facts decide, whatever the contract label says. The CRA’s published position in RC4110 is that “the facts of the working relationship as a whole decide the employment status”, looking at control, tools, subcontracting rights, financial risk, and whose business it really is. The call matters more here than almost anywhere else, because every employer obligation on this page attaches only if you’re an employee, and every instalment obligation attaches only if you’re a contractor.

	Employee	Independent contractor
Canadian income tax	You owe it on the full pay, and your employer is required to withhold at source	You owe it on the full pay, and no employer withholding happens; Canada collects from you directly
How Canada collects	Payroll withholding under Reg 102, remitted by the employer	Your return, plus quarterly instalments once your net owing passes the CRA’s threshold in the current year and one of the two prior years
CPP	Pensionable employment only if the no-establishment employer has made CPP arrangements with the CRA; see the CPP section below	You contribute on self-employed earnings through your own return
EI	Employment in Canada under a contract of service is insurable, with no employer-residence condition in the defining paragraph, subject to the 5(2) exclusions	A contract for services isn’t the contract of service the definition needs
US income tax on Canada-performed work	None for a nonresident alien; it’s foreign-source	None for a nonresident alien; it’s foreign-source
US payroll taxes	Generally no FICA where CPP coverage is actually effected: the work isn’t performed in the US and you aren’t a US citizen or resident (IRC 3121(b)(A), (B)). If CPP coverage is never effected, limb (C) plus the totalization agreement can pull US coverage in; see the CPP section	Outside FICA for a different reason: on genuine contractor facts there’s no employment relationship, so the place-of-performance limb isn’t what gives the answer. The US self-employment-tax question isn’t derived on this page
The US form you’ll be asked for	Generally none for the wages themselves	Form W-8BEN, when the client asks for it
Year-end paper	T4 from the Canadian payroll the employer should be running	Your invoices; no T4, no W-2, and normally no 1099 once a valid W-8BEN is on file with the payer

Getting this call wrong is expensive in one direction. If the relationship is really employment and everyone billed it as contracting, the CRA’s stated consequence is that an employer who failed to deduct “has to pay both the employer’s share and the employee’s share of any contributions and premiums owing, plus penalties and interest” (RC4110). Some US companies push the contractor label precisely to avoid the payroll problem in the next sections; the label doesn’t decide anything, the facts do. And if someone suggests fixing it by billing through a US LLC, read why a US LLC is a tax trap for Canadian residents first.

Do I need to fill out Form W-8BEN?

If you’re a contractor, yes, expect to: it’s the standard certificate a US payer requests from a foreign payee, and the instructions say to submit it when the withholding agent asks, whether or not you’re claiming anything. It documents that you’re not a US person, which is what lets the payer treat your invoices as payments to a foreign contractor. It creates no US tax; it prevents withholding that would otherwise happen by default. The W-8BEN instructions draw the boundaries worth knowing.

• It goes to the payer rather than the IRS: “give it to the person who is requesting it from you”, before you’re paid, and submit it “whether or not you are claiming a reduced rate of, or exemption from, withholding.”
• Form W-8ECI replaces it only if you have US-source income “effectively connected with the conduct of a trade or business within the United States”, which fully-Canadian remote work isn’t. Handing over a W-8ECI instead of a W-8BEN tells the payer you have a US business and expect to file US returns; don’t do it because a portal offered it first in a dropdown.
• Employees are pointed elsewhere: the do-not-use list reaches anyone who “claims exemption from withholding on compensation for independent or dependent personal services performed in the United States”, and sends that claim to Form 8233 or Form W-4 rather than a W-8BEN. Read it as written: it isn’t limited to treaty claims. Either way, those forms only matter for services performed IN the US.

The 1099 side runs on its own rule, and that rule isn’t in the W-8BEN instructions. Treas. Reg. 1.6041-4(a)(1) excuses information returns for payments the payor can, before paying, reliably associate with documentation it may rely on to treat the payee as foreign, which is what a valid W-8BEN supplies. That is the authority for the no-1099 answer, and it isn’t limited by income type, which matters because the exception written into the W-8BEN instructions themselves is a closed list that doesn’t include service fees.

So: a contractor working from Canada gives a W-8BEN when asked. An employee working from Canada generally gives no W-8 form at all for the wages, because wages have their own regime and Canada-performed wages aren’t subject to US withholding in the first place under Treas. Reg. 31.3401(a)(6)-1(b). If a US payroll system is nonetheless withholding US tax from a fully-Canadian employee, that’s not a form problem, it’s a setup problem, and it’s the single most common mess in these files.

What happens on days I actually work inside the US?

Those days can create US tax, and the thresholds are lower than people assume. Pay for work physically performed in the US is US-source under IRC 861(a)(3), and the statute’s own small escape almost never fits, because it carries a $3,000 cap. The realistic shield is the treaty, which for an employee paid by a US-resident company has one working limb: keep the US-exercised pay at or under US$10,000 for the year and Canada keeps the exclusive right; go over, and the US may tax the US slice however few days you were there.

“2 Notwithstanding the provisions of paragraph 1, remuneration derived by a resident of a Contracting State in respect of an employment exercised in the other Contracting State shall be taxable only in the first-mentioned State if: (a) Such remuneration does not exceed ten thousand dollars ($10,000) in the currency of that other State; or (b) The recipient is present in that other State for a period or periods not exceeding in the aggregate 183 days in any twelve-month period commencing or ending in the fiscal year concerned, and the remuneration is not paid by, or on behalf of, a person who is a resident of that other State and is not borne by a permanent establishment in that other State.”

That’s operative Article XV(2), as replaced by the Fifth Protocol. Read limb (b) closely: it needs both the day count and pay that is NOT paid by a resident of the US. When your employer is the US resident, limb (b) fails on its second condition no matter how few days you spent there, which leaves limb (a)‘s US$10,000 test doing all the work. One thing limb (a) doesn’t say is over what period you measure the ten thousand: limb (b) names a twelve-month period, limb (a) names nothing. The calendar year comes from the Treasury technical explanation of the Fifth Protocol, which states that “consistent with the prior rule, the safe harbor will apply on a calendar-year basis”, and the RSU guide works through what that sentence does once pay lands in a different year from the workdays. The commuter guide reaches the same wall from the opposite direction.

The statute’s own escape is worth a paragraph, because it gets described wrongly, including in the direction of blaming the employer. It needs all three of its conditions at once: 90 days or less in the US, pay for those services of $3,000 or less in the aggregate, and either a foreign employer or a US one where the work is done for an office it maintains abroad. The employer condition isn’t the problem. The foreign-office limb, 861(a)(3)(C)(ii), is written for exactly the case where a US company is the employer. What almost nobody clears is the $3,000 cap, which is the condition that actually shuts this door.

Two housekeeping points ride along. First, the same days count toward the US substantial presence test, which is a residency clock with its own arithmetic; occasional trips won’t reach it, but a heavy travel pattern can, and the snowbird guide runs that count properly. Second, if the US does get a slice, Canada still taxes the whole amount and credits the US tax on the US-source part under ITA 126(1), within that section’s limits, so the overlap is a credit problem rather than a double tax, if the returns are done in the right order.

If you’re a contractor rather than an employee, your US trips run through a different treaty door: business profits, and the services-PE test in Article V(9), both fact-driven. On this page that stays a flag rather than an analysis: significant US workdays as a contractor are a reason to get the file looked at rather than self-assessed from a blog post.

Does my US employer have to run Canadian payroll for me?

Yes, that’s the default the law sets, and it surprises US employers every time. Canada’s withholding duty doesn’t care where the employer is resident: ITA 153(1)(a) puts it on “every person paying” salary or wages, and the CRA’s position is that any employer, non-resident ones included, must withhold on pay for an employee’s work done in Canada. For a Canadian-resident employee that means a real Canadian payroll: a business number, a payroll program account, source deductions, remittances, and a T4.

“Every person paying at any time in a taxation year (a) salary, wages or other remuneration … must deduct or withhold from the payment the amount determined in accordance with prescribed rules and must, at the prescribed time, remit that amount to the Receiver General on account of the payee’s tax for the year”

The CRA states its side of it in one sentence on the non-resident employer certification page: “any employer, including a non-resident employer, is required to withhold amounts on account of the income tax liability of an employee in Canada”. The deduction amounts are computed under Regulation 102; which provincial table applies runs through Reg 100’s reporting-for-work rules, mechanics this page doesn’t derive.

The statute carves out exactly one employer-side escape, and it doesn’t fit you: payments by a certified “qualifying non-resident employer” to a “qualifying non-resident employee”. The next section unpacks that pair, because the definition is where US employers get the wrong idea. What the certification never does is cover a Canadian-resident hire, so for you the practical menu is short: the employer runs real Canadian payroll, restructures the relationship into genuine contracting, or uses a Canadian employer-of-record that runs the payroll as the legal employer. Paying a Canadian resident’s Canadian-performed wages through a US W-2 with US withholding is not one of the lawful options, and it layers a second problem on top: the US withholding wasn’t owed either, since Canada-performed wages of a nonresident alien are excepted from US withholding under Treas. Reg. 31.3401(a)(6)-1(b).

What is the 45-day / 90-day rule, and why doesn’t it cover me?

It’s the test inside the definition of “qualifying non-resident employee”, and it exists for the employer’s US-resident staff who visit Canada; it does nothing for you. Under ITA 153(6), a qualifying employee must be resident in a treaty country, be treaty-exempt on the payment, and either work in Canada under 45 days in the calendar year or be present under 90 days in any 12-month period including the payment. A Canadian resident fails the first two conditions, so certification never touches your own pay. The two counts measure different things, and the CRA defines both.

Count	What it counts	What it excludes
Days worked in Canada, less than 45 in the calendar year	Days physically present AND paid for the time in Canada	”generally excludes weekends, days off, and holidays”
Days of presence in Canada, less than 90 in any 12-month period including the payment	”any day during which the employee is present in Canada, even if the employee is only present for a portion of the day”	Nothing; a partial day is a presence day

An employee only needs to pass one of the two. The employer side of the machinery is subsection 153(7): the Minister certifies an employer, on application, in prescribed form. The prescribed form is RC473, and the CRA asks for it “at least 30 days before a qualifying non-resident employee starts providing services in Canada.” Certification runs up to two calendar years, carries conditions (document residence, track both day counts, get a business number, file T4s, file Canadian income tax returns for the calendar years the certification covers, and make books and records available in Canada for the CRA to inspect), and the T4 duty itself has a relief valve: no T4 is needed for a qualifying employee whose taxable income earned in Canada in the year, counting treaty-exempt amounts, is not more than CAN $10,000, after reasonable enquiry. A non-resident employee who doesn’t fit the definition, or whose employer never certified, can still apply personally for a Regulation 102 waiver on Form R102-R.

What about CPP, EI, and US Social Security?

EI generally applies, CPP has a trap built just for this fact pattern, and US Social Security is the levy most writers get wrong, because it depends on the CPP answer rather than sitting apart from it. Where CPP coverage is actually effected on the pay, Canada-performed work sits outside FICA under IRC 3121(b) and nothing should be coming off for it. Where coverage is never effected, the same wages can be pulled into the US system instead. So the CPP trap comes first: it’s Canada Pension Plan Regulations section 22, and almost nobody has read it.

“22 (1) The entire employment of a person by an employer who (a) is not resident in Canada, and (b) does not have an establishment in Canada, is excepted from pensionable employment.”

Subsection 22(2) then puts a Canadian resident’s employment in Canada for exactly such an employer back INTO pensionable employment, but only “if the employer has made arrangements satisfactory to the Minister” to pay both contribution shares and file the returns. So whether your years in this job build CPP entitlement at all can hang on whether a payroll clerk in another country filed an application with the CRA. That’s worth checking directly instead of assuming: ask whether CPP is actually being remitted on your pay. The backstop sits in the Canada-US totalization agreement, whose Article V rule is that a person who works in one country is covered by that country’s system alone, and which adds that where a person would be subject to Canada’s laws “but coverage is not effected under those laws, the person shall be subject to United States laws.” Follow that through and you land back at FICA: the US laws the agreement applies are listed in Article II(1)(a), and they include “Chapter 2 and Chapter 21 of the Internal Revenue Code”, which are SECA and FICA.

That is where the US levy comes back in, and it’s the part written off almost everywhere. IRC 3121(b) defines FICA employment as service performed “within the United States”, or performed outside the US by a citizen or resident of the US for an American employer. A nonresident alien at a Canadian desk is neither of those, which is where most write-ups stop. But the definition has a third limb, built for exactly this problem: limb (C) also counts service “regardless of where or by whom performed, which is designated as employment or recognized as equivalent to employment under an agreement entered into under section 233 of the Social Security Act”, and the Canada-US agreement is such an agreement, which is the loop limb (C) closes. So read FICA on your pay stub as a signal rather than a verdict. Either the payroll is set up wrong, or limb (C) has engaged because nobody ever effected CPP coverage on the same pay. Those two have opposite fixes, and whether CPP is actually being remitted is what tells them apart. Whether the fallback has engaged on a specific payroll is a facts question this page flags rather than resolves, and it’s a real reason to have the file looked at instead of assuming a refund is sitting there.

Contractors sit outside the trap entirely: a Canadian resident with contributory self-employed earnings makes CPP contributions through the return under Canada Pension Plan section 10, no employer arrangement involved.

EI is more ordinary: EI Act 5(1)(a) defines insurable employment as “employment in Canada by one or more employers, under any express or implied contract of service or apprenticeship, written or oral”, with no condition about where the employer is resident in that paragraph, subject to the exclusions in subsection 5(2) that this page doesn’t derive. Contractors sit outside that definition, since a contract for services isn’t a contract of service.

Levy	Fully remote employee in Canada	Contractor in Canada
FICA (US)	Outside 3121(b)‘s first two limbs, so generally no FICA where CPP coverage is effected. Limb (C) can still reach the same pay through the totalization agreement if coverage never was	Outside FICA for want of an employment relationship, so the place-of-performance limb isn’t what does the work here
CPP	Pensionable only if the no-establishment employer made the CPP Reg 22(2) arrangements; otherwise excepted	You contribute on self-employed earnings through your return
EI	Insurable employment under EI Act 5(1)(a), subject to the 5(2) exclusions	Outside the contract-of-service definition
One-system rule	Totalization Article V: the work country’s system, alone	Article V has a self-employment rule keyed to residence; not derived here

Could my home office give my employer a bigger Canadian problem?

Possibly, and it’s the employer’s problem rather than yours. On some fact patterns a US company with people working in Canada can have a Canadian permanent establishment, including under the services-PE test in operative Article V(9), whose main limb needs an individual present in Canada 183 days or more in a twelve-month period plus a revenue-concentration test. One remote employee rarely gets there by presence alone, but the analysis is fact-driven and belongs to the employer’s advisors. The mechanics of a company straddling the border run through the CCPC guide.

Does my state matter?

It can, and this page won’t pretend to derive fifty answers. States write their own residency and withholding rules, and nothing in the federal analysis above decides a state question. For a fully remote worker who stays in Canada, the state layer is usually a setup error to fix rather than a tax to plan around, and the first pay stub is where you find it. The practical questions are concrete.

• Which state, if any, is coded into your employer’s payroll for you?
• Is that state withholding tax from a person who neither lives nor works there?
• What does the payroll provider need in order to stop?

If your plans include actually moving to a state, that’s a different corridor entirely, and the BC to California guide shows how deep a single state’s overlay goes.

What this costs, honestly?

The remote-work file is one of the cheaper cross-border patterns to run properly, because done right it usually stays a one-country income tax file. What moves the cost is rarely the tax itself; it’s the cleanup and the edges, and every item on the list below is checkable before anyone quotes anything.

• A W-2 with US withholding that wasn’t owed on Canada-performed work, which means a US refund filing alongside the Canadian return.
• A misclassification year that has to be unwound with the employer.
• US workdays over the US$10,000 treaty line, which add a US nonresident return and a foreign tax credit computation.
• The employer-side build: payroll account, certification analysis, or employer-of-record setup, which is its own project.
• GST/HST registration questions on the contractor path, real but outside this page.

The Cross-Border Assessment is a fixed $249: a written, CPA-reviewed read on your specific setup, employee or contractor, your travel calendar against the treaty lines, what your employer’s obligations actually are, and what needs fixing before year-end rather than after. For this fact pattern it usually settles whether you have a one-return year or a two-return year before anyone pays for the second one.

The order of operations, condensed?

Seven steps, in the order that saves the most cleanup. Residency and classification come first, before the first payday if you can manage it: confirm your ties kept you a Canadian resident, then settle employee versus contractor on the facts. The paperwork follows the classification: a W-8BEN and instalment planning for a contractor, a genuinely Canadian payroll for an employee. After that it’s calendar discipline: track every US workday, check that CPP is actually being remitted if you’re an employee, and reread the travel count in November while a December trip can still be moved.

1. Confirm nothing moved your Canadian residency: same home, same ties, same T1 with worldwide income.
2. Settle employee versus contractor on the facts, in writing, before the first payment if you can.
3. Contractor: give the payer a W-8BEN, invoice gross, and set aside for Canadian tax and instalments.
4. Employee: make sure the payroll country is Canada. If a W-2 with US withholding shows up, treat it as a fire to put out rather than a document to file away.
5. Keep a travel calendar. Days worked in the US are the one thing that quietly adds a second country to your return.
6. Employer side: Canadian payroll account and Reg 102 for a Canadian-resident hire; RC473 and the two day-counts only ever help with non-resident staff visiting Canada; check CPP is actually being remitted.
7. Reread step 5 in November, while there’s still time to move a December trip.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.