US Income Taxes for Canadian Businesses: A Simplified Guide

Canada and the United States share a robust trading relationship. Their intertwined economies mean that businesses operating across the border must navigate the tax rules of both countries. The Canada-US tax treaty aims to prevent double taxation, but understanding the nuances of tax obligations can be challenging. 

Key Points: 

• US Income Tax Complexity: The US income tax system, for both individuals and businesses, is intricate. This article offers a high-level overview, but it’s crucial to consult a tax expert familiar with both Canadian and US tax systems for specific advice. 
• Three Scenarios for Canadian Businesses with US Income: 
• Unincorporated Business: If you operate as an individual. 
• Canadian Corporation: If you operate as a Canadian corporation. 
• US Non-resident LLC: If you operate through an LLC set up in the US. 
• Canadian Businesses Selling to US Customers from Canada: 
• If you’re a Canadian business selling online to US customers and dispatching orders from Canada, this is considered an export. 
• Individuals: No US income tax return required. Report business income on Canada’s T2125 on T1. 
• Corporations: No US income tax return required. Report income on Canada’s T2 Corporation income tax return. 
• Non-Resident LLC in the US: File Form 5472 with the 1120 Proforma with IRS. In Canada, file T2 for the LLC. 
• Sales to US Customers from US Warehouse: 
• If you use warehouse services in the US (like Amazon’s FBA) but don’t have an office or employee there, you have US Effectively Connected Income (ECI). 
• Individuals: File 1040-NR in the US and claim a treaty-based position with form 8833. Report income in Canada on T2125. 
• Corporations: File form 1120-F in the US and claim a treaty-based position with form 8833. Report income in Canada on T2. 
• Non-Resident LLCs in the US: File Form 5472, Form 8833, and 1040NR in the US. Report income in Canada on T2. 
• Canadian Businesses with Offices or Employees in the US: 
• If you have a physical presence in the US, you have a Permanent Establishment (PE) there. 

• Individuals: File 1040-NR and pay taxes in the US. Report worldwide income in Canada on T1. 
• Corporations: File form 1120-F in the US. Report income in Canada on T2. 
• Non-Resident LLC in the US: File 5472 and 1040 NR in the US. Report income in Canada on T2. 
• US State Income Taxes: The US-Canada tax treaty is federal. Some US states, like California, might tax income even if it’s minimal.