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T1134 Self-Check Canada 2026 — Foreign Affiliate Filing Tool

ByBader A. Chowdry, CPA, CA, LPA

Quick answer: Insight Accounting CPA’s free T1134 Self-Check determines if you must file Form T1134 for 2026. Enter ownership %, country, and controlled status. Get back: filing requirement, applicable schedule, penalty exposure ($2,500/year minimum), and CRA deadline. CPA, CA, LPA-built.

By Bader A. Chowdry, CPA, CA, LPA — Insight Accounting CPA.

If you own 10% or more of a foreign corporation (a "foreign affiliate"), you may be required to file Form T1134 with the CRA every year — with steep penalties for missing the deadline ($2,500 minimum, $25/day up to $2,500 maximum per affiliate). Our self-check determines if you owe a filing.

Try the calculator →

How the calculator works

Inputs

  1. Percentage ownership of foreign corporation
  2. Foreign country
  3. Whether the foreign corp is "controlled" (CFA / FAPI determinations)
  4. Total non-Canadian assets
  5. Active vs passive income type
  6. Year

Outputs

  1. Whether T1134 filing is required
  2. Which schedule applies (basic vs detailed)
  3. Estimated penalty if missed ($2,500/year minimum)
  4. CRA deadline (15 months after fiscal year-end)

Why T1134 matters for Canadian owners with foreign holdings

The T1134 is the #1 most-missed CRA filing among Canadian small business owners with international structures — particularly snowbirds, immigrants with home-country corps, and Canadian founders with US Delaware C-corps. The penalty exposure compounds: a single missed T1134 over 5 years can run $12,500+ per affiliate, even with zero foreign income.

Frequently asked questions

Do I need to file even if my foreign corp is dormant?

Yes — if ownership is 10%+, the filing requirement applies regardless of activity. There’s a simplified reporting option for dormant affiliates.

What if I missed prior years?

Use the Voluntary Disclosure Program (VDP). VDP filings avoid penalties if accepted. Insight Accounting CPA prepares VDP applications for clients with missed T1134 history.

Is T1134 the same as T1135?

No. T1135 is for foreign property over $100K total. T1134 is for foreign affiliates (foreign corporations you partly own). Both can apply simultaneously.

What’s the deadline?

15 months after the corporation’s fiscal year-end. Most affiliates with December year-ends are due March 31 of the following year.

What does Insight Accounting CPA charge for T1134 preparation?

Typical T1134 engagement: $3,500-$15,000 per year depending on number of affiliates and complexity. Often combined with annual T2 corporate tax filing for a bundled rate.

Need a CPA review on your numbers?

The calculator gives you a starting point. For a custom analysis tailored to your situation, book a 30-minute discovery call with Bader Chowdry, CPA, CA, LPA. Call (905) 270-1873 or book online. We serve Mississauga, Toronto, and the GTA.

This article is for general informational purposes only and is not tax, legal, or accounting advice. The calculator produces estimates based on 2026 Canadian and Ontario tax law — actual outcomes depend on individual circumstances. Tax law changes frequently; please consult a qualified Canadian CPA before acting on calculator output. Insight Accounting CPA Professional Corporation does not accept liability for actions taken based on this article or the calculator alone.

Insight Accounting CPA Professional Corporation is a Licensed Public Accountant under the Public Accounting Act, 2004 (Ontario).

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