Ecommerce marketplace facilitator rules: when the platform collects and when you must

Your platform statement shows tax collected on your sales. Is your GST/HST obligation handled, or must you report it too? The answer depends on one thing you control — whether you are registered. This guide explains who collects what, and why registration flips the answer.

Related: Place of supply: which province’s GST/HST rate do you charge?.

Where these rules came from

The Excise Tax Act was amended, effective 1 July 2021, to add GST/HST provisions for non-resident suppliers, distribution platform operators and accommodation platform operators in the digital economy. Before that, the framework did not treat a marketplace as a collector, so much online advice and seller folklore — predates the change.

The measures cover several distinct streams: cross-border digital products and services, the supply of qualifying goods located in Canada, and platform-based short-term accommodation. Most physical-goods sellers are dealing with the second of those.

The rule that decides it for an ecommerce facilitator

For a supply of qualifying goods in Canada, the CRA sets out the pattern clearly:

• A registered non-resident vendor collects the GST/HST on qualifying goods it supplies directly to purchasers.
• A registered Canadian vendor collects the GST/HST on qualifying goods it supplies directly to purchasers.
• A registered distribution platform operator collects the GST/HST on qualifying goods supplied through its platform by non-registered vendors, whether those vendors are Canadian or non-resident.
• A registered distribution platform operator also collects on qualifying goods it supplies directly itself.

The platform’s collection obligation is triggered by the vendor not being registered under the normal GST/HST regime. It is a backstop, not a service. If you are registered, your marketplace sales are yours to collect on, report and remit. Assuming otherwise produces a nil return that should not have been nil.

What counts as a distribution platform operator

Not every site that shows your products is a marketplace for these purposes. In respect of a supply of qualifying goods made through a specified distribution platform, a distribution platform operator is a person other than the supplier or an excluded operator who:

• controls or sets the essential elements of the transaction between the supplier and the recipient; or
• if that does not apply to anyone, is involved — directly or through arrangements with third parties — in collecting, receiving or charging the consideration for the supply and transmitting all or part of it to the supplier.

An excluded operator sits outside all of that. It does not directly or indirectly set the terms of the supply, authorize the charge to the recipient, or take part in ordering or delivery. It also covers a person who solely lists or advertises the property, or redirects to a platform where it is offered, and a person who is solely a payment processor.

That last carve-out matters practically. A payment gateway on your own storefront is not a marketplace and is not going to collect anything on your behalf. Selling through your own site is your supply, full stop.

The threshold has not gone away

A costly misreading is that platform collection means the seller never registers. The small supplier rules apply independently. Under $30,000 over four consecutive calendar quarters, you need not register, though you may volunteer. Exceed $30,000 in a single calendar quarter and you must charge GST/HST on the supply that took you over, with registration effective no later than that day.

Registering often suits a goods seller anyway: it lets you recover tax paid on inventory, packaging, software, fees and shipping through input tax credits. Thresholds and effective dates are in the GST/HST registration guide.

Safe harbour, and why your platform settings matter

A platform operator can often rely on information from third-party suppliers when deciding whether to collect and remit. So the rules impose joint and several (or solidary) liability on the operator and supplier where the supplier makes a false statement, including one misleading by omission.

Where the operator did not know, could not reasonably have known, and relied in good faith, it is relieved of liability for what it did not collect; the supplier who made the statement is liable instead. In plain terms: the registration number and tax settings in your seller account decide who is on the hook.

Multi-channel sellers have a reporting problem, not just a tax one

Most sellers use several channels: a Shopify storefront, a marketplace or two, perhaps wholesale invoices. Each reports differently — gross with tax broken out, net deposits after fees, or neither in usable form. The GST/HST return needs total taxable supplies and total tax collected, and a bank feed shows neither.

Two habits fix most of it. Record gross sales and platform fees separately, not the net deposit — fees are deductible and the return needs the gross. And reconcile each channel’s tax report to every return. With an accountant used to e-commerce, the channel reconciliation is usually the whole job.

Fulfilment warehouses and where the goods sit

The qualifying-goods measure targets a specific pattern: goods already in Canada, often in a fulfilment warehouse, sold to a Canadian buyer by a vendor who may be anywhere. To the buyer it is a domestic sale; before the measure, often nobody registered was collecting on it.

For a Canadian seller, where your inventory sits and who moves it are tax facts, not logistics details. A platform’s fulfilment network can put your stock in provinces you have never traded in, and the provincial tax follows the place of supply. Sellers moving to national fulfilment often find their filings had to change when the pallets moved, not when they noticed.

Platform-based short-term accommodation runs on its own parallel set of rules within the same digital-economy measures. If you rent property through a booking platform as well as selling goods, treat those as two separate analyzes rather than assuming one answer covers both.

Where sellers get caught

Filing nil returns while registered because “the marketplace handles the tax”. Registering but leaving platform tax settings unchanged. Treating a payment processor as a marketplace. Booking net deposits, which understates revenue and expenses and leaves the return unsupported.

Getting it right

Once you know your registration status and what each platform does, the outcome is predictable. Set the platform settings to match, and reconcile per channel per period. If you sell through several channels into several provinces, have someone who works with online sellers set the structure up once.

This article is general information for Canadian online sellers and is current as of July 2026. The digital-economy GST/HST measures are detailed and fact-specific — confirm how they apply to your own platform arrangements and registration status. It is not tax advice; please speak with a CPA before acting on anything here.