- Some digital platform rules in Canada put collection obligations on the platform itself in specific circumstances — most notably involving non-resident vendors or certain…
- Once your online selling activity crosses the small-supplier threshold (a figure you should verify directly rather than assume), you are generally required to register for GST/HST,…
Selling through Etsy, eBay, or a similar platform feels different from running a traditional retail business — the platform handles the storefront, the payment processing, and often a tidy year-end sales summary. It's easy to assume the platform is also handling your HST obligations. For most Ontario sellers, it isn't, and the gap between "the platform processed the sale" and "the platform is responsible for my tax compliance" is where a lot of small sellers get into trouble.
This article walks through what's actually your responsibility as an Ontario-based marketplace seller versus what, if anything, the platform itself is on the hook for.
Do Marketplace Platforms Collect HST for You?
It depends heavily on the platform and the type of seller. Some digital platform rules in Canada put collection obligations on the platform itself in specific circumstances — most notably involving non-resident vendors or certain accommodation-style platforms. For an Ontario-resident individual selling their own goods through a general marketplace like Etsy or eBay, the more common situation is that you remain the seller of record for tax purposes, and the registration, collection, and remittance obligations sit with you, not the platform.
Don't assume otherwise based on what a platform's help page says in general terms — the rules distinguish between different platform business models, and the answer for your specific setup deserves a direct check.
When You're Responsible for Registering and Collecting
Once your online selling activity crosses the small-supplier threshold (a figure you should verify directly rather than assume), you are generally required to register for GST/HST, charge it on your taxable sales, and remit it to the CRA — the same as any other business selling in Ontario. Sales made through a marketplace still count toward that threshold calculation. A "hobby that grew into a side income" story doesn't exempt the activity once it functions as a business.
Marketplace Sellers vs. Traditional Retailers
| Marketplace seller (Etsy/eBay, resident) | Traditional retailer | |
|---|---|---|
| Who registers for GST/HST | Generally the individual seller, once required | The business itself |
| Who collects tax from the customer | Generally the seller, through the platform's checkout tools | The business, at point of sale |
| Small-supplier threshold | Still applies, based on the seller's total sales | Applies the same way |
| Recordkeeping responsibility | The seller, even though the platform provides summaries | The business |
| Multi-province sales | Common and often overlooked by hobby-turned-business sellers | Usually already built into retail systems |
Multi-Province and Cross-Border Sales
Marketplace sellers often ship across provinces, and sometimes internationally, without thinking of themselves as an "interprovincial" or "export" business. The place of supply rules that determine which province's rate to charge, or whether a sale is a zero-rated export, apply the same way to a marketplace seller as to any other business — the fact that the sale came through a shopping cart provided by Etsy or eBay doesn't change the underlying tax analysis.
Recordkeeping for Marketplace Income
A platform's year-end summary is a helpful starting point, but it is not a substitute for your own records. Keep track of:
- [ ] Gross sales by month and by destination province
- [ ] Platform fees and other costs, kept separate from gross sales figures
- [ ] Whether and when you crossed the small-supplier threshold
- [ ] Your GST/HST registration number once registered, and where it appears on customer-facing receipts
- [ ] Any sales made outside the platform (craft fairs, direct orders) that also count toward your totals
Frequently asked questions
If Etsy or eBay already charges tax at checkout, do I still need to register myself?
Not necessarily, if the platform is genuinely acting as the collecting party under the specific digital platform rules that apply to it — but this depends on the platform's own registration status and how it has configured its systems, not on a general assumption. Confirm your specific platform's role rather than guessing.
I only sell a few items a month as a hobby — does this really apply to me?
Possibly not yet, if your total sales stay below the small-supplier threshold. But once the activity is regular and profit-oriented, it's treated as a business for tax purposes regardless of how casually it started, and the threshold calculation includes all of your sales, not just the ones through one platform.
Do I need a separate business number to sell on a marketplace?
You generally need a GST/HST registration once you're required to register, which comes with a registration number. Whether you also need a broader business registration depends on how you've structured the activity — sole proprietor, incorporated, or otherwise.
What if I sell on more than one platform?
Your total sales across all platforms and any direct sales are combined for purposes of the small-supplier threshold and your overall reporting — you can't treat each platform as a separate business for GST/HST purposes.
This is a tax question
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