You cannot serve your Canadian employer’s notice from inside the U.S. under a TN admission that covers only your new employer—finish it in Canada or obtain separate concurrent authorization first.
“I am a Canadian citizen about to get my TN visa at the border. Can I legally serve my 2-week notice for my Canadian employer by working remotely from the US after entering on my TN visa, or does TN status strictly forbid remote work for a foreign entity? Should I just resign the same day my TN is approved to avoid immigration and tax issues?”
Summary
You do not need to make your resignation effective on the exact day CBP admits you. The manageable, low-risk plan is to finish all productive Canadian work while still in Canada, then cross and work only for the TN-authorized employer.
Your cleanest option is to separate the Canadian work from your U.S. entry, but a properly documented concurrent-employer route can exist in a narrower case.
Perform every handover task while still physically in Canada, make that your final service day, and then enter for the new U.S. job. This avoids U.S. work for the Canadian employer because employment turns on where the services are performed (8 CFR 274a.1(h)).
You do not have to resign on the same day CBP grants . Your formal payroll or termination date may be later, but after entry you must perform no services for the Canadian employer—no email, meeting, handover, login, or on-call duty—unless separately authorized (8 CFR 214.1(e)(2); 8 CFR 274a.1(h)).
This is possible only if the old assignment independently qualifies: a listed TN profession, a specific prearranged U.S. employer/entity engagement, and full documentation of duties, duration, credentials, and remuneration. Before entering, present both engagements to CBP and obtain ; a foreign employer may provide the letter, and TN status can cover multiple employers (8 CFR 214.6(d)(3)(ii); 9 FAM 402.17-5(A)(7)(c)).
Your new employer’s TN admission does not authorize remote services for an undisclosed Canadian employer. USCIS expressly says employment with a different or additional employer is not authorized until approval; a Canadian may instead depart and seek readmission for the added employer (USCIS Policy Manual Vol. 2, Part P, Ch. 5(A)).
A tax-treaty exemption and immigration work authorization are separate tests.
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Watch out for
Next steps
These steps separate your Canadian notice period from your U.S. work and preserve a clear immigration and tax record.
Before crossing the border
Set the last day you will perform Canadian work
Choose a final service date that occurs while you are physically in Canada. Complete all emails, meetings, handover documents, account access, and on-call responsibilities by that date; these compliance steps require no U.S. form or government fee.
Requirements
Before TN admission
Finish the notice period from Canada
Do the two weeks in Canada, then travel. If the employer keeps a later payroll or formal termination date, perform zero services after U.S. entry unless CBP separately authorizes that employer.
Requirements
Before any U.S.-based task
Use the concurrent route only if the old assignment qualifies
At your initial port-of-entry application, disclose both engagements and ask CBP to adjudicate both. If you have already entered, do not work for the added employer unless USCIS first approves a Form I-129 filed for the qualifying engagement, or you depart and obtain readmission for it; USCIS states that added-employer work is not authorized while approval is pending.
Requirements
From your first U.S. day
Track the tax facts from your entry date
If you perform authorized Canadian-employer services inside the United States, treat the compensation as potentially U.S.-source. If you remain a nonresident and qualify for the treaty withholding exemption, give Form 8233 to the Canadian payer; your ultimate treaty and state-tax result depends on the unresolved residence, compensation, permanent-establishment, and destination-state facts.
Requirements
Legal sources
This answer is grounded in the current eCFR, USCIS Policy Manual, Department of State Foreign Affairs Manual, IRS guidance, and the Canada-U.S. income-tax treaty.
8 CFR 214.1(e)(2)
TN holders may perform only authorized employment, and unauthorized work violates status.
(e)(2)
A nonimmigrant who is permitted to engage in employment may engage only in such employment as has been authorized. Any unauthorized employment by a nonimmigrant constitutes a failure to maintain status within the meaning of section 241(a)(1)(C)(i) of the Act.
8 CFR 274a.1(g)-(h)
Employment is determined by services performed inside the United States, not by the employer’s nationality.
(g)-(h)
The term employer means a person or entity, including an agent or anyone acting directly or indirectly in the interest thereof, who engages the services or labor of an employee to be performed in the United States for wages or other remuneration. The term employment means any service or labor performed by an employee for an employer within the United States, including service or labor performed on a vessel or aircraft that has arrived in the United States and has been inspected, or otherwise included within the provisions of the Anti-Reflagging Act codified at 46 U.S.C. 8704, but not including duties performed by nonimmigrant crewmen defined in sections 101 (a)(10) and (a)(15)(D) of the Act.
8 CFR 214.6(d)(3)(ii)
A foreign employer can supply TN documentation, but the U.S. professional engagement and qualifications still must satisfy TN rules.
(d)(3)(ii)
The applicant must present documentation sufficient to satisfy the consular officer (in the case of a Mexican citizen) or the Department officer (in the case of a Canadian citizen) that the applicant is seeking entry to the United States to engage in business activities for a United States employer(s) or entity(ies) at a professional level, and that the applicant meets the criteria to perform at such a professional level. This documentation may be in the form of a letter from the prospective employer(s) in the United States or from the foreign employer, and must be supported by diplomas, degrees or membership in a professional organization.
USCIS Policy Manual Vol. 2, Part P, Ch. 5
An added employer requires approval first; Canadians can alternatively leave and seek readmission for that employer.
Chapter 5(A)
The applicant (not petitioners) must show that he or she meets all applicable documentary requirements. Employment with a different or additional employer is not authorized until USCIS approves the application. Alternatively, a Canadian citizen seeking to change or add a U.S. employer may depart the United States and apply for readmission to obtain additional employment authorization with a new or additional employer.
9 FAM 402.17-5(A)
A foreign employer and multiple employers are possible, but the professional work must involve a bona fide U.S. entity.
9 FAM 402.17-5(A), (A)(5), and (A)(7)(c)
The applicant must engage in a prearranged business activity at a professional level for a U.S. or foreign employer. The TN visa is designed to allow for a citizen of a USMCA-signatory country to enter the United States to engage in professional employment for a U.S. entity. An individual in TN status may work for multiple employers at the same time.
IRS Personal Service Income Sourcing
The physical location of the work generally determines the source of wages.
All wages and any other compensation for services performed in the United States (U.S.) are generally considered to be from sources in the U.S.. The place, where the personal services are performed, generally determines the source of the personal service income, regardless of where the contract was made, or the place of payment, or the residence of the payer.
IRS Foreign-Person Employer Guidance
A foreign employer can have U.S. withholding and reporting duties for U.S.-performed services, subject to treaty relief.
Individuals who are neither U.S. citizens nor U.S. residents employed by a foreign person
Wages paid by a foreign person to an individual who is neither a U.S. citizen nor a U.S. resident within the meaning of IRC section 7701(b)(1)(A) with respect to services performed in the United States are effectively connected with the conduct of a trade or business in the United States. These wages are subject to U.S. graduated tax rates and federal income tax withholding and reporting by the foreign employer. In addition, these wages may be exempt from withholding under an income tax treaty.
Canada-U.S. Income Tax Convention, Art. XV
The treaty provides two alternative short-term employment-income tests for a qualifying Canadian treaty resident.
Article XV(2)
Notwithstanding the provisions of paragraph 1, remuneration derived by a resident of a Contracting State in respect of an employment exercised in a calendar year 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 the other Contracting State for a period or periods not exceeding in the aggregate 183 days in that year and the remuneration is not borne by an employer who is a resident of that other State or by a permanent establishment or a fixed base which the employer has in that other State.
IRS Publication 519 (2025)
If you meet the substantial-presence test, your U.S. tax residency can generally begin on your first U.S. day that year.
Residency Starting Date Under the Substantial Presence Test
If you meet the substantial presence test for a calendar year, your residency starting date is generally the first day you are present in the United States during that calendar year.
Instructions for Form 8233 (Rev. December 2025)
A nonresident employee claiming a treaty withholding exemption gives Form 8233 to the payer.
Required Withholding Form(s)
Complete and give Form 8233 to your withholding agent if some or all of your compensation is exempt from withholding. Complete Form 8233 for compensation you receive for dependent personal services only if you are claiming a tax treaty withholding exemption for part or all of that income.
These are the official rules published or current on the cited dates; immigration and tax rules can change.
This is general information about official processes, not legal advice, and SettleKit is not a law firm.
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