Amazon FBA and U.S. E-Commerce

A Cross-Border Tax Guide for Canadian Sellers

Executive Summary

Selling through Amazon FBA gives Canadian entrepreneurs access to the U.S. market without building their own warehousing and fulfillment network. The tax side is less straightforward. Once inventory enters the United States, a Canadian seller needs to consider U.S. federal income tax, the Canada-US Tax Treaty, state sales tax, marketplace-facilitator rules, entity structure, Canadian income tax, GST/HST, foreign tax credits, and ongoing reporting obligations.

A common mistake is assuming Amazon handles all tax matters because the platform collects sales tax in many states. Marketplace sales-tax collection addresses only one part of the picture — it does not determine whether the seller has a U.S. trade or business, a permanent establishment, U.S. income-tax filing obligations, Canadian corporate tax obligations, or other cross-border reporting requirements. The correct analysis starts with the seller’s residence, legal structure, inventory locations, activities in each country, and sales channels.

At a Glance

• Who legally owns the Amazon business — an individual, Canadian corporation, U.S. LLC, U.S. corporation, or another entity.

• Where the inventory is physically stored.

• Whether the business sells only through Amazon, or also through Shopify, Walmart, its own website, or other channels.

• Whether the business has enough U.S. activity to create U.S. federal or state tax obligations.

• How the U.S. structure will interact with Canadian tax rules.

The answer to one question often affects several others. Putting inventory in U.S. fulfillment centres, for example, has different implications from shipping every order directly from Canada.

Why This Decision Matters

Under Fulfillment by Amazon, a seller sends inventory to Amazon’s fulfillment network, and Amazon generally handles storage, picking, packing, shipping, customer service, and returns. Commercially, this simplifies U.S. expansion. For tax purposes, the physical movement and storage of that inventory becomes an important fact on its own.

A Canadian seller should know where inventory is located and should not assume that operating the business from Canada means all business activity occurs in Canada. For U.S. federal income-tax purposes, foreign persons engaged in a U.S. trade or business generally need to consider whether their income is effectively connected with that business, and selling products through a U.S. trade or business can produce effectively connected income.

For a Canadian resident entitled to treaty benefits, the analysis does not end with U.S. domestic tax law. The Canada-US Tax Treaty generally provides that the business profits of a Canadian resident are taxable in the United States only where that resident carries on business through a permanent establishment there, with the U.S. then taxing the profits attributable to that establishment. U.S. trade or business and permanent establishment are related concepts, but they are not interchangeable — this distinction is critical.

U.S. Domestic Law vs. the Canada-US Tax Treaty

A Canadian seller entering the U.S. market should generally analyze the issue in two stages, since a domestic filing obligation and an actual U.S. tax liability are not always the same thing.

Stage	What It Determines	Key Considerations
U.S. Domestic Law	Whether the seller is engaged in a U.S. trade or business and whether income is effectively connected with it.	The IRS generally treats a foreign person selling products through a U.S. business as engaged in a U.S. trade or business, subject to the specific facts and applicable exceptions.
Canada-US Tax Treaty	Whether a Canadian resident's business profits are protected from U.S. tax absent a permanent establishment.	Article VII generally shields business profits unless a permanent establishment exists; a permanent establishment analysis looks at fixed places of business, offices, dependent-agent arrangements, and related facts under Article V.

An Amazon fulfillment arrangement therefore requires careful factual analysis rather than an automatic conclusion. Consider a Canadian corporation whose management, employees, accounting, and strategic decisions all remain in Canada, while inventory is shipped to Amazon fulfillment centres in the United States. The presence of U.S. inventory is an important fact, but on its own it does not resolve whether a U.S. permanent establishment exists — the corporation’s entire operating arrangement needs to be reviewed under both U.S. domestic law and the treaty.

State Sales Tax: What Amazon Handles and What It Doesn’t

Federal income tax and state sales tax are separate systems, and this distinction causes significant confusion for e-commerce sellers. Amazon operates under marketplace-facilitator regimes across U.S. jurisdictions and generally collects and remits applicable sales tax on marketplace transactions where required, which meaningfully reduces a seller’s collection burden — but it does not mean the seller has no state tax responsibilities.

A seller should separately review sales made outside Amazon, direct website or Shopify sales, other marketplaces, inventory stored in different states, state income or franchise taxes, registration requirements, annual state filings, and both economic and physical nexus. A business selling exclusively through Amazon may have a very different compliance profile from one generating substantial direct-to-consumer sales through its own website.

For example, a Canadian business earning US$500,000 in Amazon sales and US$150,000 in Shopify sales cannot assume that Amazon’s collection of tax on the larger figure resolves the tax treatment of the Shopify sales. The seller still needs to examine its own nexus and collection responsibilities for those direct sales. “Amazon collects sales tax for us” should never be treated as equivalent to “we have no U.S. tax obligations.”

Canadian Tax Still Applies

Canadian residents generally report worldwide income in Canada. Operating through Amazon.com, receiving U.S. dollars, opening a U.S. bank account, or forming a U.S. entity does not, by itself, remove the Canadian tax obligation. For a Canadian corporation operating an Amazon business, the profits generally remain relevant to its Canadian corporate income-tax return.

Where tax is properly paid in the United States on the same income, Canada’s foreign tax credit system and the Canada-US Tax Treaty are designed to address double taxation, subject to the applicable rules and limitations. The right question is rarely “how do we avoid Canadian tax” — it’s “where is the income taxable, which country taxes it first, what filings are required, and how do the two systems interact.” That framing reduces the risk of unexpected tax, duplicate filings, penalties, and inefficient structures.

GST/HST Still Matters

Canadian e-commerce businesses should not focus exclusively on U.S. sales tax. CRA guidance confirms that Canadian residents earning income through digital platforms remain subject to Canadian income-tax rules and may also have GST/HST obligations — particularly where products are sold to Canadian customers, inventory is stored in Canada, or the business uses Canadian fulfillment facilities.

Canada also has specific GST/HST rules for the digital economy, covering matters such as qualifying goods stored in Canadian fulfillment warehouses and supplies facilitated by distribution platforms. Whether the vendor or the platform operator collects GST/HST depends on factors including the vendor’s registration status and whether the sale is facilitated through a qualifying distribution platform. The $30,000 registration threshold remains relevant in applicable circumstances, but sellers should not apply it mechanically without first determining which GST/HST regime and which supplies are actually relevant to their business.

Choosing the Right Entity for an Amazon Business

The previous Tax Square Knowledge Hub articles discussed U.S. LLCs and C Corporations in detail, and those entity-selection issues become especially important for Amazon sellers. There is no rule that says an Amazon seller must use a U.S. LLC. A Canadian entrepreneur might operate through a Canadian corporation, a U.S. LLC, a U.S. C Corporation, a Canadian corporation with a U.S. subsidiary, or another structure suited to the facts — and each produces different tax and compliance consequences.

When an LLC May Fit an Amazon Business

A single-owner or small-team seller wants a straightforward, low-formality U.S. entity.
The business expects to distribute most profits to its owner rather than reinvest them.
The seller is not currently planning to raise outside investment.

An LLC is generally treated as a pass-through entity for U.S. federal tax purposes unless it elects otherwise, and Canada does not necessarily follow the same classification. This mismatch is one reason Canadians should avoid forming a U.S. LLC simply because an online incorporation provider, Amazon consultant, or U.S.-focused adviser recommended one — the structure should be reviewed before incorporation, not after the business has accumulated significant revenue, inventory, and retained earnings.

When a U.S. Corporation May Fit an Amazon Business

The business expects substantial U.S. operations, employees, or facilities.
Outside investors or significant U.S. reinvestment are part of the plan.
A future U.S.-focused expansion is anticipated beyond simple marketplace sales.

A U.S. corporation is not automatically the better choice. The Canadian shareholder’s tax position, the corporation’s residence, repatriation of profits, foreign-affiliate reporting, withholding tax, and eventual exit strategy all need consideration before this structure is selected.

Cross-Border Reporting and Compliance

An Amazon business may appear simple operationally while generating several tax filings. Depending on the structure and facts, compliance may include the following.

Country	Typical Filings	Notes
Canada	T1 or T2 income-tax reporting, GST/HST returns, foreign tax credit calculations, foreign property or foreign-affiliate reporting where applicable.	Canadian bookkeeping should track sales, fees, inventory, and foreign-currency conversion separately.
United States	Federal income-tax returns or protective filings where applicable, state income or franchise tax returns, sales-tax registrations and returns where required, entity-level annual filings, information returns tied to foreign ownership.	The exact list depends on the structure — this is why incorporating first and asking tax questions later often becomes expensive.

Common Mistakes

Assuming Amazon’s collection of marketplace sales tax also settles federal income tax, state income tax, Canadian tax, GST/HST, or entity reporting.
Forming a U.S. LLC without confirming how it will be treated under Canadian tax rules.
Ignoring where inventory is stored, instead of maintaining records that show its location over time.
Focusing only on U.S. tax exposure while forgetting that a Canadian resident remains within the Canadian tax system regardless of where customers, inventory, banking, or entities are located.
Waiting until the business is large to review the structure, when restructuring after significant growth typically creates far higher legal, accounting, tax, and operational costs.

Tax Square Insight

Do not determine the U.S. income-tax result simply by asking whether Amazon stores inventory in the United States. Review the complete operating model — legal entity, treaty eligibility, U.S. activities, personnel, facilities, contracts, and inventory arrangements — together, and revisit that review as the business adds warehouses, direct sales, or significant revenue.

Action Checklist

Before expanding your Amazon or e-commerce business into the United States, consider the following:

☐ Identify the legal entity that will operate the business.

☐ Determine where inventory will be stored.

☐ Separate Amazon marketplace sales from direct website and other marketplace sales.

☐ Review U.S. trade or business exposure and Canada-US Treaty permanent-establishment exposure.

☐ Review state sales-tax nexus and confirm whether Amazon or your business is responsible for collection.

☐ Review U.S. state income and franchise-tax exposure.

☐ Confirm Canadian income-tax treatment and GST/HST registration and collection requirements.

☐ Review foreign tax credit availability and identify Canadian and U.S. information-reporting requirements.

☐ Establish bookkeeping capable of tracking sales, fees, inventory, taxes, and foreign currencies separately.

☐ Revisit the structure before adding employees, warehouses, investors, or substantial direct sales.

Frequently Asked Questions

Does Amazon collect U.S. sales tax for Canadian sellers?

Amazon generally collects and remits marketplace sales tax where marketplace-facilitator laws require it. Sellers still need to review direct sales, other platforms, state income or franchise taxes, registrations, and other compliance obligations.

Does storing inventory in an Amazon U.S. warehouse automatically mean I owe U.S. federal income tax?

Not necessarily. U.S. domestic tax law and the Canada-US Tax Treaty must both be considered, and the permanent-establishment determination depends on the full facts rather than one factor alone.

Do I need a U.S. LLC to sell on Amazon.com?

Not as a general rule. Canadian businesses have several possible structures, and the appropriate one depends on ownership, operations, tax position, growth plans, and other facts.

If I pay U.S. tax, will Canada tax the same income again?

Canadian residents generally report worldwide income. Where the same income is properly taxed in both countries, treaty provisions and foreign tax credits often provide mechanisms for relieving double taxation, subject to applicable requirements and limitations.

Does selling only to U.S. customers eliminate GST/HST concerns?

No. The business’s complete Canadian activities still need review, since GST/HST treatment depends on the nature and place of supplies, registration status, customers, inventory arrangements, and other facts.

Should I form the U.S. company before speaking with a cross-border tax adviser?

Ideally, review the structure first. Changing an entity after operations have begun is usually more complicated than selecting an appropriate structure before launch.

Official References

Internal Revenue Code and IRS Guidance — Provides U.S. federal rules on trade or business status, effectively connected income, and related filing obligations.
Canada-US Tax Treaty — Addresses permanent-establishment analysis, business-profits taxation, and relief from double taxation.
Income Tax Act (Canada) — Governs the Canadian tax treatment of worldwide income, including income earned through U.S. entities or platforms.
Canada Revenue Agency (CRA) Guidance — Provides Canadian reporting requirements for digital-platform income and GST/HST obligations, including digital-economy and fulfillment-warehouse rules.
State Marketplace-Facilitator Statutes — Govern when Amazon and other marketplaces collect and remit state sales tax on a seller’s behalf.

Disclaimer

This article is intended for general educational and informational purposes only and does not constitute tax, legal, accounting, or investment advice. Cross-border tax outcomes depend on the taxpayer’s specific facts, entity structure, residency, activities, inventory locations, and applicable law. Canadian and U.S. tax rules change over time. Professional advice should be obtained before establishing an entity, moving inventory across the border, changing an existing structure, or making significant tax or business decisions.