Regulation 105 and 102 Withholding on Non-Residents

If you are a US business or individual paid for work physically performed in Canada, you may be surprised to find that 15% of your fee is held back before you are paid. That is Regulation 105 of the Income Tax Regulations at work. The same Canadian system reaches non-resident employees through Regulation 102, which requires withholding on the part of an employee's pay that relates to duties carried out in Canada. Neither withholding is a final tax. Each is security — a deposit against whatever Canadian income tax the non-resident may ultimately owe once a Canadian return is filed. Understanding how the rules work, and when a waiver is available, is often the difference between cash flow tied up for a year or more and getting paid in full on schedule.

Why Regulation 105 and 102 matter

Canada taxes non-residents on income from carrying on business in Canada and on employment exercised in Canada. Because a non-resident may have no Canadian filing history and may be difficult for the Canada Revenue Agency (CRA) to pursue after the work is done, the withholding regime collects tax at source. Regulation 105 obliges any payer — Canadian resident or not — that pays a non-resident a fee, commission, or other amount for services rendered in Canada (other than in the course of employment) to withhold 15% of the gross payment and remit it to the Receiver General. We confirmed the rate at 15% against current CRA guidance. The obligation falls on the payer, not the service provider, and a payer that fails to withhold can be held personally liable for the tax, plus interest and penalties.

Regulation 102 is the employment counterpart. A foreign employer that sends staff to Canada is generally required to withhold and remit Canadian income tax on the portion of remuneration that relates to services performed in Canada — even if the employer has no Canadian presence and even if the employee is in Canada only briefly. The withholding follows the physical location of the work, not where the contract was signed or where payroll is run.

The practical sting is timing. The 15% (or the employment withholding) comes off the top, in cash, long before any Canadian return is filed. For a US consultant whose actual Canadian tax may be nil under the treaty, that is a real and avoidable cost of capital. The waiver process exists precisely to address this.

The mechanics in Canada

Regulation 105 — services. The withholding applies to gross amounts paid for services physically rendered in Canada. It does not apply to a pure sale of goods, to services performed entirely outside Canada, or to amounts that are properly characterized as something other than service fees (such as royalties, which fall under Part XIII withholding). Where a contract mixes Canadian and non-Canadian services, only the Canadian portion is subject to Regulation 105 — though a reasonable allocation must be documented. Reimbursements and disbursements can raise difficult questions; the CRA has revisited its position on subcontractor fee reimbursements in recent years, so the treatment of pass-through costs should be confirmed for the specific facts and the period involved.

The payer remits the withheld amount to the CRA by the 15th day of the month following the month of payment. The payer then reports the gross fees and the tax withheld on a T4A-NR slip (Statement of Fees, Commissions, or Other Amounts Paid to Non-Residents for Services Rendered in Canada), which must be issued to the non-resident and filed with the CRA by the last day of February following the calendar year. The non-resident generally must file a Canadian income tax return to reconcile the actual liability against the amount withheld and to recover any excess.

Regulation 102 — employment. For a non-resident employee, the employer calculates withholding on the Canadian-duty portion of pay much as it would for a resident, and reports on a T4 slip. Two relief routes exist. The first is the qualifying non-resident employer (QNRE) certification: an employer resident in a treaty country can apply on Form RC473 — at least 30 days before the employee begins work in Canada — to be certified, after which it need not withhold under Regulation 102 for a qualifying non-resident employee (QNRE-employee). A qualifying non-resident employee is one who is resident in a treaty country, is exempt from Canadian tax on the pay under that treaty, and either works in Canada fewer than 45 days in the calendar year that includes the payment or is present in Canada fewer than 90 days in any 12-month period that includes the payment. Certification can apply for up to two calendar years and removes the need to obtain a separate waiver for each individual. The second route, for employees or employers who do not qualify, is an individual waiver on Form R102-R.

Note also the Quebec overlay: where services are rendered in Quebec, an additional 9% provincial withholding applies, and a federal Regulation 105 waiver does not stop it. A separate waiver application to Revenu Quebec is required.

The treaty interaction

For most US service providers, the substantive answer to "do I actually owe Canadian tax?" turns on the Canada-US tax treaty. Under Article VII (Business Profits), the business profits of a US enterprise are taxable in Canada only to the extent they are attributable to a permanent establishment (PE) in Canada, as defined in Article V. If a US contractor has no PE in Canada, the business profits are not taxable here — and a treaty-based waiver of the Regulation 105 withholding should be available.

Crucially, Article V contains a services PE rule in paragraph 9. A US enterprise can be deemed to have a Canadian PE — even without a fixed place of business — if either of two tests is met over a 12-month period: (1) services are performed in Canada by an individual present in Canada for 183 days or more and, during that period, more than 50% of the enterprise's gross active business revenue is derived from those Canadian services; or (2) the services are provided for an aggregate of 183 days or more in any 12-month period for the same or a connected project for customers who are Canadian residents or who maintain a Canadian PE to which the services relate. Where the 183-day services PE threshold is crossed, treaty protection from Canadian tax falls away even though the underlying withholding number does not change.

For individuals providing independent personal services, and for non-resident employees, the treaty's employment article governs whether short-term work in Canada is exempt. A treaty waiver of withholding does not by itself excuse the obligation to file a Canadian return; it addresses the cash held back, not the reporting. The interaction between treaty relief, the withholding mechanics, and Canadian filing obligations is the part that most often trips people up, and it is fact-specific.

The waiver process

A non-resident can apply to reduce or eliminate Regulation 105 withholding before the work begins by filing Form R105 with the CRA. There are two grounds. A treaty-based waiver demonstrates that, under the Canada-US treaty (typically Articles V and VII), the provider has no Canadian PE and the income is therefore not taxable in Canada. An income-and-expense waiver instead shows that the 15% of gross is excessive relative to the net Canadian profit the engagement will actually generate, so a lower hold-back is appropriate. The application should be submitted to the CRA tax services office for the area where the services will be performed at least 30 days before the services begin or before the first payment, whichever is earlier. Until a waiver is approved, the payer must withhold; an approval received after payment does not undo a withholding already required.

Where no waiver is obtained, the route to recovery is to file the Canadian return after year-end and claim a refund of any over-withheld amount. That works, but it ties up cash for many months and creates a filing obligation that some non-residents do not anticipate.

Common traps

• The payer bears the risk. If the Canadian payer does not withhold and the CRA later assesses, the payer — not the non-resident — is on the hook for the 15%, plus interest and penalties. Canadian clients increasingly insist on withholding unless a valid waiver is in hand.
• Withholding is on gross, not net. The 15% applies to the gross fee, so a thin-margin engagement can have far more than its profit held back — which is exactly when an income-and-expense waiver matters.
• A waiver is not retroactive. File Form R105 (or arrange QNRE certification on RC473) before the work and payments start. A late application cannot release tax that was already required to be withheld.
• Quebec is separate. A federal waiver does not address the additional 9% Quebec withholding on services rendered in Quebec; a distinct Revenu Quebec application is needed.
• A waiver does not end your filing duty. Even where treaty relief eliminates Canadian tax, a Canadian return — and often a US return reporting the same income — may still be required, with the treaty resolving double taxation through the foreign tax credit and treaty-exemption mechanisms.
• The 183-day services PE rule. A US enterprise that assumed it had no Canadian PE can be deemed to have one once the Article V(9) day-count is crossed, changing the analysis mid-engagement.
• Characterization matters. Whether a payment is a service fee (Reg 105), employment income (Reg 102), a royalty, or the disposition of property (which engages section 116 withholding) changes which regime applies — getting the label right at the contract stage avoids surprises.

How Barrett Tax Law approaches Regulation 105 and 102 withholding

We start by mapping the actual facts — who is performing what services, where, for how many days, for which customers, and how the contract is written. From there we assess whether the Canada-US treaty exempts the income (Articles V and VII, including the services PE day-count), and we model whether a treaty-based waiver, an income-and-expense waiver, or qualifying non-resident employer certification gives the cleanest path to releasing cash. Where a waiver is the right tool, we prepare and file Form R105, Form RC473, or the individual Form R102-R within the timelines, coordinate with the Canadian payer on T4A-NR reporting, and address the separate Quebec withholding where it applies. We also plan the downstream Canadian and US returns so the withholding is reconciled and any double tax is relieved. If you are being paid for work in Canada, or you are a Canadian payer unsure of your withholding duty, you are welcome to book a free consultation to review your situation.

Regulation 105 and 102 withholding rarely sits in isolation. It connects to broader cross-border questions we handle, including the overview of cross-border tax, section 116 clearance certificates on dispositions of taxable Canadian property, US-side reporting obligations such as FATCA and FBAR compliance, catch-up filings through the streamlined filing procedures and the Canadian voluntary disclosure program, and planning for those becoming Canadian residents. For practical context on whether a contractor risks being recharacterized, our guide on the personal services business rules and our cross-border move tax checklist are useful starting points.

This page is general information, not legal advice. Cross-border tax outcomes depend on the specific facts of your engagement and on both countries' rules, which change over time; verify current rates, thresholds, treaty positions, and form requirements before acting, and consult a qualified adviser about your situation.