IRS Certified Acceptance Agents (CAAs) for the W-7 ITIN application in Canada.

Section 01Why a Canadian needs an ITIN

An ITIN is the IRS-issued tax identifier for individuals who must interact with the US tax system but do not qualify for a US Social Security Number. For a Canadian, the SSN is generally not available unless the Canadian has previously held a US work-authorised status that issued one. The ITIN fills the gap: it is a 9-digit number that always begins with 9, used as the identifier on US tax returns, withholding documents, and selected US financial-product applications.

The specific circumstances in which a Canadian needs an ITIN cluster into four practical categories:

• Selling US-situs real property and reclaiming FIRPTA withholding. Under the Foreign Investment in Real Property Tax Act, the buyer of US real estate from a non-US person withholds 15 percent of the gross sale price (in many cases) and remits it to the IRS within 20 days of closing. The seller's actual US tax liability is computed on their US tax return (Form 1040-NR), and the difference between the 15 percent withheld and the actual tax owed is refundable. To file Form 1040-NR and reclaim the over-withheld amount, the seller needs an ITIN. This is the single most common reason Canadians apply for an ITIN.
• Owning US-situs real property that generates US-source income. A Canadian who rents out a Florida condo or generates US-source dividends, royalties, or other passive income files an annual US tax return (1040-NR for the rental income, or a tax-treaty-claim documentation for some passive income). The ITIN is the identifier on these filings. A Canadian who owns a Florida property and rents it out part of the year on Airbnb or VRBO almost always needs an ITIN.
• Filing as the spouse or dependent of a US person. A Canadian married to a US citizen or US permanent resident who files a joint US tax return needs an ITIN if they do not have an SSN; similarly for a Canadian-resident dependent claimed on a US tax return.
• Banking and financial-product applications requiring an ITIN. Some Canadian-affiliated US-bank credit and mortgage products and most direct-US-issuer ITIN-eligible credit cards (Capital One Platinum Secured, Quicksilver Secured) accept ITIN in place of SSN. Building a US credit history from scratch (see the parallel guide on building a US credit score from scratch) is meaningfully easier with an ITIN in hand.

The Canadian who is not in any of these four categories typically does not need an ITIN. A Canadian who travels to the US for occasional leisure, has no US-source income, owns no US-situs property, and uses Canadian credit instruments exclusively does not have a US tax-reporting obligation and therefore does not need an ITIN.

Section 02The CAA programme: what a Certified Acceptance Agent does

A Certified Acceptance Agent (CAA) is a person or entity that has entered into a written agreement with the IRS to assist individuals applying for an ITIN. The CAA's distinguishing capability is the ability to authenticate the applicant's identification documents (notably the passport) in person and certify the authentication on a Form W-7 (COA) Certificate of Accuracy. The certified copy and the W-7 application are then submitted to the IRS ITIN Operations Unit at Austin, Texas, and the applicant retains the original passport throughout the process.

Without a CAA, the W-7 applicant has two alternative document-handling paths. First, mail the original passport (or another approved original identification document) to the IRS along with the W-7 application; the IRS authenticates the document at the Austin office and returns the original to the applicant's mailing address. This process typically takes 60 to 90 days and requires the Canadian to be without their passport during this period (which conflicts with any cross-border travel plans, banking-document-presentation requirements, and so on). Second, present the original documents in person at an IRS Taxpayer Assistance Center (TAC); this is operationally available only inside the United States and requires the Canadian to travel to a TAC location.

The CAA path is the practical default for most Canadians because it preserves the passport in the applicant's possession throughout the process, avoids any US travel solely for the document presentation, and provides a Canadian-side professional contact for the application questions that inevitably arise.

To become a CAA, the IRS requires the candidate to complete two training courses (the ITIN Acceptance Agent training and a forensic-document-recognition course), to submit an electronic application through the IRS e-Services portal, to pass a background check, and to sign a formal agreement with the agency. The full certification cycle takes approximately 60 days from application to approval. Eligible CAA applicants include financial institutions, tax-exempt educational institutions, and tax-return preparers including Certified Public Accountants, Enrolled Agents, and other tax professionals. In Canada, CAAs are commonly cross-border-tax accounting firms, Canadian Chartered Professional Accountants who have completed the IRS certification, and select Canadian Big Six bank cross-border desks.

Section 03The W-7 form and its 8 exception-reason categories

Form W-7 (the IRS Application for Individual Taxpayer Identification Number) is the application form for an ITIN. The current revision is December 2024. The form asks the applicant to identify which of 8 numbered reason categories applies to their need for an ITIN. Each reason category determines the supporting documentation the applicant must submit alongside the W-7. The 8 reason categories, as published in the W-7 instructions:

1. Reason (a): Non-resident alien required to obtain an ITIN to claim a tax-treaty benefit. Used when a Canadian claims a benefit under the Canada-US tax treaty (for example, a reduced withholding rate on certain US-source income).
2. Reason (b): Non-resident alien filing a US tax return. The most common reason for Canadians. Used when the Canadian must file Form 1040-NR to report US-source income such as Florida rental income or to reclaim FIRPTA withholding after a property sale.
3. Reason (c): US resident alien (based on days of presence) filing a US tax return. Used when a Canadian has met the Substantial Presence Test threshold and becomes a US tax resident requiring a US tax return.
4. Reason (d): Dependent of US citizen or resident alien. Used for Canadian children or other dependents claimed on a US tax return by a US-person parent or guardian.
5. Reason (e): Spouse of US citizen or resident alien. Used when the Canadian spouse of a US citizen or permanent resident files a joint US tax return.
6. Reason (f): Non-resident alien student, professor, or researcher filing a US tax return or claiming an exception. Specific to certain Canadian academics in the US.
7. Reason (g): Dependent or spouse of a non-resident alien holder of a US visa. Specific to Canadian dependents of Canadian visa-holders in the US.
8. Reason (h): Other. The catch-all category, used when the specific circumstance does not fit (a) through (g) but the applicant has an IRS-recognised reason for needing an ITIN (commonly the Exception 1 categories that allow ITIN issuance without an attached tax return, such as banking ITIN for FATCA reporting, mortgage-interest reporting, gambling winnings reporting).

The selection of the correct reason category is consequential because it determines the supporting-documentation set. The most common Canadian applications use reason (b) for non-resident alien filing a 1040-NR, often with FIRPTA reclaim as the underlying reason; reason (h) for banking-and-financing applications under one of the Exception 1 sub-categories; and reasons (d) or (e) for spouse-or-dependent-of-US-person filings.

The IRS published an update effective June 1, 2026: CAAs submitting Form W-7 applications for clients claiming Exception 1(a) Partnership must include a copy of the relevant partnership or LLC agreement showing the partnership name, EIN, and applicant's name and signature. This is a documentation-completeness update; the underlying Exception 1(a) Partnership category itself remains available.

Section 04Documentation requirements (passport-only vs supporting documents)

The W-7 application requires the applicant to submit identification documents that establish foreign status and identity. The IRS accepts a list of 13 identification document types, but a Canadian's practical choice in 2026 is binary: either submit a valid Canadian passport (which is the only single document that establishes both foreign status and identity, qualifying as a stand-alone document), or submit two of the supporting documents from the IRS list with at least one of them being a photo identification.

Passport-only path (recommended for Canadians)

A valid Canadian passport is the only stand-alone identification document under the W-7 rules. If the Canadian submits a valid passport (or a certified copy authenticated by the CAA), no other supporting documents are needed for the identity-and-foreign-status portion of the application. This is the cleanest path because it requires only one document to be authenticated rather than two.

The CAA authenticates the passport in person at the appointment, completes the Form W-7 (COA), and forwards the package to the IRS. The Canadian retains the original passport throughout. This path is the recommended default for any Canadian who holds a valid passport.

Two-document path (for Canadians without a valid passport)

If the Canadian does not hold a valid passport, the W-7 requires two supporting documents from the IRS list, at least one of which must include a photograph. The 12 supporting documents accepted (in addition to the stand-alone passport) include the national identification card (issued by a country or jurisdiction), US driver's license, foreign driver's license, US state ID card, foreign voter's registration card, US military ID card, foreign military ID card, US Citizenship and Immigration Services photo ID, visa, civil birth certificate, medical records (for dependents under 6 only), school records (for dependents under 18 only).

For a Canadian without a passport, the typical two-document combination is a Canadian driver's license plus a Canadian birth certificate, or a Canadian provincial photo ID card plus a Canadian birth certificate. Each document must be original or a certified copy from the issuing agency (a notarised copy is not sufficient).

Supporting tax-return or exception documentation

Beyond the identity-and-foreign-status documents, the W-7 must include the supporting documentation specific to the reason category. For reason (b) (non-resident alien filing a US tax return), the W-7 is typically attached to the Form 1040-NR itself: the applicant files the W-7 and the 1040-NR together as a single package. For Exception 1 categories (used under reason (h)), the applicant attaches the exception-specific documentation (a bank letter for the FATCA-reporting exception, a real-estate sale closing statement for the FIRPTA exception, an investment-account statement for the passive-income exception, etc.).

Section 05CAA vs IRS Taxpayer Assistance Center vs direct mail-in

The Canadian applicant has three operational paths to submit the W-7. Each has different trade-offs on cost, time, and document handling.

Path 1: Certified Acceptance Agent in Canada (recommended)

The CAA authenticates the passport in person at the appointment, certifies the W-7 (COA), and forwards the package to the IRS. The Canadian retains the passport throughout. Cost: a CAA's professional fee, typically in the 150 to 400 CAD range depending on the complexity of the application and the firm's pricing. Time: 1 to 2 weeks for the CAA appointment, plus the IRS processing time of 7 to 11 weeks. Documents: passport remains with the applicant. Geographic constraint: the Canadian must travel to the CAA office for the in-person authentication (or arrange a video-call authentication in some cases, depending on the CAA's process).

Path 2: IRS Taxpayer Assistance Center (in the US only)

The Canadian travels to an IRS Taxpayer Assistance Center inside the United States, presents the passport in person to an IRS employee, and submits the W-7. The IRS authenticates the passport on the spot and returns it. Cost: no IRS fee for the application, but the Canadian incurs the cost of US travel to reach a TAC location. Time: the in-person authentication is immediate; the IRS-processing time of 7 to 11 weeks applies thereafter. Documents: passport remains with the applicant. Geographic constraint: a Canadian must be physically in the US during the application appointment, which limits this path to Canadians who are already travelling to the US for other reasons.

Path 3: Direct mail-in to IRS Austin

The Canadian mails the original passport (or a certified copy from the Canadian passport-issuing office) plus the W-7 to the IRS ITIN Operations Unit at Austin, Texas. The IRS authenticates the passport at the Austin office and returns the original to the applicant's mailing address. Cost: no IRS fee; mailing cost only. Time: 60 to 90 days for the round trip on the passport, plus the IRS processing time. Documents: the Canadian is without their passport for 60 to 90 days, which constrains any cross-border travel during this period. Geographic constraint: none; the application is purely mail-based.

Choosing between the three paths

The CAA path (1) is the recommended default for most Canadians because it preserves the passport in the applicant's possession and provides Canadian-side professional support. The TAC path (2) is realistic only for Canadians already travelling to the US for other reasons and who can include a TAC visit. The direct mail-in path (3) is the lowest-cost option but is rarely chosen by Canadians because of the passport-surrender duration: a Canadian who anticipates any cross-border travel within the 60 to 90-day window cannot accept this path.

Section 06Finding a CAA in Canada: the official IRS list and verification

The IRS publishes an official list of Acceptance Agents in Canada at the page irs.gov/individuals/international-taxpayers/acceptance-agents-canada. The list is the authoritative source for which Canadian individuals and firms hold a valid current CAA agreement with the IRS. The list is organised by province and city, includes the firm name, the contact phone number, and the address of the CAA office.

Before booking an appointment with any CAA, the Canadian should: (1) confirm the CAA's name and contact details against the official IRS list (CAAs occasionally exit the programme; the IRS list is updated periodically); (2) confirm that the CAA's certification covers Form W-7 (some Acceptance Agents are AAs rather than CAAs and can review applications but cannot certify identification documents); (3) ask the CAA about their pricing, their typical appointment availability, and whether they offer in-person or remote video authentication.

CAAs in Canada typically fall into four categories:

• Cross-border-tax accounting firms. Many Canadian accounting firms that specialise in cross-border tax matters (US tax filing for Canadians, FIRPTA reclaim, US estate tax planning for Canadian US-property owners) hold CAA certification. Examples (verified through the IRS Canada list at the publication date): Maroof HS in Mississauga and Toronto, U.S. Tax IQ, FIRPTA Canada, several Canadian Chartered Professional Accountant firms with US-tax specialisations.
• Tax-preparation chains. Some Canadian branches of US-affiliated tax-preparation chains (H&R Block, for example, through their cross-border service line) hold CAA certification.
• Select Canadian Big Six bank cross-border desks. A small number of Canadian banks have CAA certification at specific cross-border-banking-specialist contact points; this is product-dependent and the customer should ask the cross-border desk directly.
• Independent Canadian CPAs and Enrolled Agents. Individual Canadian Chartered Professional Accountants or US Enrolled Agents who hold the CAA certification operate as solo practitioners or in small partnerships.

The choice of which CAA to use depends on the complexity of the underlying tax matter, the geographic proximity to the Canadian's home or workplace, and the CAA's pricing. For a Canadian whose ITIN application is for a straightforward FIRPTA reclaim or a 1040-NR rental-income filing, any properly certified CAA should be sufficient. For a Canadian with a more complex cross-border tax situation (multiple US-source income streams, US estate-planning considerations, multiple property holdings), the choice of a CAA firm that also handles the underlying tax planning often produces a smoother end-to-end experience.

Section 07Typical CAA fees and timeline expectations

CAAs in Canada set their own fees for the W-7 service. The IRS does not regulate CAA pricing; the market sets it. As of mid-2026, the typical fee range for a Canadian CAA providing a standard W-7 service (in-person authentication, certificate of accuracy, package submission to the IRS, follow-up coordination with the applicant) runs approximately 150 to 400 CAD for a single applicant. Family applications (spouse plus dependents) typically run higher (300 to 700 CAD total for the family). Some CAA firms bundle the W-7 service with broader cross-border tax preparation (1040-NR preparation, FIRPTA reclaim coordination) at package pricing.

Timeline expectations have two components: the CAA appointment lead time and the IRS processing time.

• CAA appointment lead time. 1 to 4 weeks depending on the CAA's calendar and the time of year. Peak season (January through April, when many Canadians file their cross-border tax returns) has longer lead times. Outside peak season, a CAA appointment is often available within 1 to 2 weeks.
• IRS processing time. 7 weeks for standard processing (May through December typically), 9 to 11 weeks during the peak filing season (January 15 through April 30) and for overseas-filed applications. The IRS notifies the applicant of the assigned ITIN by mail to the address on the W-7 application.

For a Canadian planning around the ITIN, a useful planning rule of thumb: from the day of the CAA appointment, expect the ITIN to be in hand approximately 9 to 12 weeks later (CAA submission plus standard IRS processing) or 12 to 14 weeks later (during peak season). A Canadian who needs an ITIN for a specific deadline (a property closing, a specific 1040-NR filing date, a banking-product application) should initiate the CAA appointment well in advance of the deadline.

Section 08Worked example: Marie's ITIN application from Toronto

Marie, 58, a Toronto resident, acquired a 380,000 USD condo in Naples, Florida in November 2025. In January 2026, she begins preparing for the future US-mortgage refinance she plans for 2027 and for the eventual rental-income reporting if she chooses to rent the property out part of the year. Her ITIN application sequence:

Step 1 (week 0, January 5, 2026): identify the CAA. Marie consults the IRS Acceptance Agents Canada list at irs.gov/individuals/international-taxpayers/acceptance-agents-canada. She filters for CAAs in the Greater Toronto Area and selects a cross-border-tax accounting firm in Mississauga (the firm is on the IRS list, has CAA certification, and specialises in Canadian-Florida cross-border tax matters). She calls the firm and books a W-7 appointment for the following week.

Step 2 (week 1, January 12, 2026): the CAA appointment. Marie attends the CAA office in person with her valid Canadian passport, a completed Form W-7 (selecting reason category (h) Other, under Exception 1(d) for the bank-letter category that allows ITIN issuance for a Canadian who will use the ITIN for a future US-side financial-product application), and a supporting letter from her Florida title company confirming the upcoming closing-related tax filings. The CAA authenticates the passport on the spot, completes the Form W-7 (COA), and gives Marie a copy of the package. The fee charged is 250 CAD. The CAA forwards the package to the IRS ITIN Operations Unit at Austin the same week.

Step 3 (week 1 to week 7, January to mid-March 2026): IRS processing. The IRS receives the package at Austin and processes it through the standard 7-week cycle (Marie's application is submitted during the early part of the year, so it is at the start of the peak-season cycle that typically begins January 15; she chose to submit just before the peak-season cutoff). The IRS reviews the W-7, verifies the supporting documentation, and assigns an ITIN.

Step 4 (week 9, mid-March 2026): ITIN notification arrives by mail. The IRS mails the ITIN notification letter to Marie's Toronto address. The letter contains the 9-digit ITIN beginning with 9. Marie now has her ITIN and can use it on all subsequent US tax-related filings, on US banking-product applications, on US credit-card applications at ITIN-accepting issuers (Capital One Platinum Secured, Quicksilver Secured), and on the future 1040-NR filing if she rents the property out.

Step 5 (ongoing): file the next 1040-NR if applicable. If Marie decides to rent the Florida property out part of the year, she files Form 1040-NR for that tax year using the ITIN. The 1040-NR reports the rental income, the deductible expenses (property tax, HOA fees, repairs, depreciation), and the resulting US tax owed or refunded. Marie's Canadian return reports the same rental income (with the US tax credit) under the Canada-US tax treaty.

Section 09CA-side and FL-side comparison (10 provinces)

The IRS W-7 process is identical across all 10 Canadian provinces. The variability is on the availability of Certified Acceptance Agents in each province (more dense in Ontario and Quebec, sparser elsewhere) and on the Canadian-side tax-filing nuances that interact with the ITIN.

Pragmatic reading: a Canadian in any province can apply for an ITIN through a CAA. The province affects mostly the in-person travel logistics to reach a CAA office (denser in Ontario and Quebec; some travel may be required from smaller provinces or remote locations), the Quebec-specific Law 25 privacy framework that overlays the federal PIPEDA baseline, and the Canadian-side tax filings that complement the US 1040-NR.

Section 10Frequently asked questions

Do I need to file a US tax return to get an ITIN? Usually yes. The most common ITIN application is for a Canadian filing Form 1040-NR (reason b on the W-7), and the W-7 is typically attached to the 1040-NR as a single package. Exception 1 categories (under reason h) allow ITIN issuance without an attached tax return; common Exception 1 sub-categories include the bank-letter exception for FATCA reporting, the FIRPTA exception for real-property withholding, and the passive-income exception. The CAA can advise on which exception applies to the specific case.

Can a CAA in Canada certify my passport without my being physically present? The IRS rules require the CAA to authenticate the passport in person, which historically meant a physical appointment at the CAA's office. Some CAAs now offer video-call authentication procedures that the IRS accepts under specific conditions; the applicant should ask the CAA whether they offer this and whether the IRS accepts their specific video procedure. The conservative default is the in-person appointment.

Once I have my ITIN, can I use it forever? The ITIN remains valid as long as it is used on a US federal tax return at least once every three consecutive tax years. If it is not used on a return for three consecutive years, it expires. Renewal uses the same Form W-7 process.

Does my ITIN give me work authorisation or immigration status in the US? No. The ITIN is strictly a tax identifier. It does not confer any immigration status, work authorisation, or eligibility for US Social Security benefits. It is used only for US tax-reporting purposes and for the financial-product applications that accept it.

Can I apply for an ITIN online? No, the IRS does not currently accept online W-7 applications. The W-7 must be submitted on paper (signed by the applicant) with the supporting documentation. The CAA path involves an in-person CAA appointment for the authentication, and the CAA mails the paper package to the IRS Austin office.

Can I apply for an ITIN for my Canadian spouse or dependent at the same time as my own? Yes. A separate Form W-7 is required for each applicant (the spouse and each dependent), but the CAA can process them simultaneously in a single appointment, and the applications can be mailed together to the IRS.

What does the CAA do with my passport during the appointment? The CAA inspects the passport in person to verify its authenticity (the security features, the photo match, the validity dates) and makes a certified copy that is attached to the W-7 package. The applicant retains the original passport throughout. The CAA's authentication is the substitute for the IRS's own authentication that would otherwise occur if the original passport were mailed to Austin.

See the parallel guides on ITIN application for Canadian property owners, Form W-7 for Canadians, building a US credit score from scratch, and the cross-border tax-reporting guides on FATCA Form 8938 for Canadians, FBAR (FinCEN 114) for Canadians, and CRA Form T1135 for Canadian-held US assets.

Section 11Scope statement

This guide covers the Certified Acceptance Agent (CAA) programme in Canada for the IRS Form W-7 ITIN application in 2026. It does not cover:

The detailed mechanics of the Form 1040-NR itself (the US Non-Resident Alien Income Tax Return), which is a separate document with its own filing instructions and which is typically prepared alongside the W-7 application; the broader IRS Acceptance Agent (AA) role (the simpler tier that does not include document certification); the specific Exception 1 sub-categories (a, b, c, d, e) that allow ITIN issuance without an attached tax return, each of which has its own documentation rules and is typically handled by the CAA on a case-by-case basis; the renewal mechanics for ITINs that have expired due to three years of non-use; the US estate-tax planning for Canadian US-property owners (a separate cross-border tax-planning topic that interacts with the ITIN but is materially broader); and the Canadian-side tax filings that complement the US 1040-NR (T1 federal, TP-1 Quebec, foreign-tax-credit claim under the Canada-US treaty).

The IRS guidance, the W-7 form revision, the CAA programme rules, the processing times, and the documentation requirements cited reflect what the IRS publishes as of the May 2026 revision date. The IRS updates W-7 and CAA programme rules periodically; the current IRS guidance at the time of any specific application is the authoritative source. The CAA fees cited are typical market ranges as of mid-2026 and vary by CAA firm and complexity of the application.