GST/HST for the Self-Employed: The Small-Supplier Threshold and Registration Rules

Summary

If you are self-employed in Canada, knowing when you must register for a GST/HST account is a cornerstone of tax compliance. The CRA uses a "small supplier" threshold to determine whether registration is mandatory.

Under CRA rules, the small supplier test looks at your worldwide taxable supplies (together with those of your associates) over four consecutive calendar quarters. If your total taxable supplies over the past four consecutive quarters (including the current quarter) do not exceed $30,000 CAD, you are a small supplier. You are not required to register and cannot charge GST/HST to your customers. You may, however, choose to register voluntarily if you make taxable sales, leases, or other supplies in Canada.

When your sales cross the $30,000 threshold, the registration timeline depends on how the threshold is breached:

  • If you exceed $30,000 within a single calendar quarter, you lose small-supplier status immediately upon making the supply that pushes you over the limit. You must charge GST/HST on that very supply, and your effective registration date is no later than the date of that supply.
  • If you exceed the $30,000 threshold over four consecutive quarters (but not within a single quarter), you cease to be a small supplier at the end of the month following the quarter in which the threshold was exceeded, and you must begin charging GST/HST on your first taxable supply after that date.

Once registered, the landscape changes significantly. You must charge GST/HST to your customers — 5% federal component plus the applicable provincial portion — and file periodic returns (annually, quarterly, or monthly) remitting the tax collected. On the other hand, you become eligible to claim Input Tax Credits (ITCs) for the GST/HST paid or payable on purchases and expenses related to your commercial activities. In effect, you remit only the net difference between the tax you collect and the tax you paid on business inputs.

Notably, if you provide only exempt supplies — such as certain medical or educational services — you generally cannot register for a GST/HST account, meaning you neither charge GST/HST nor claim ITCs.

Sources

Our Take

For self-employed professionals and small business owners starting out, the timing of GST/HST compliance often causes confusion. In practice, we see recurring pitfalls: forgetting to aggregate sales of associated persons when testing the $30,000 threshold, and failing to charge GST/HST promptly after a sudden spike in a single calendar quarter — which can leave you paying the tax out of pocket without having collected it from the customer.

Voluntary registration is a strategic decision worth evaluating. If your clients are mostly GST/HST-registered businesses, they can claim ITCs to recover the tax you charge, so your registration does not increase their net cost. Meanwhile, you can begin claiming ITCs on your own business purchases, reducing your real operating costs. But if your primary customers are individual consumers who cannot claim ITCs, adding GST/HST to your invoices will make your prices appear higher.

For self-employed cross-border professionals serving both Canadian and U.S. clients, GST/HST registration raises additional questions — such as how GST/HST applies to services provided to non-resident clients, and whether cross-border services qualify as zero-rated supplies. We recommend discussing the optimal registration strategy with a licensed CPA before launching your business.

Disclaimer: This article is general information only and does not constitute tax advice; it should not substitute professional tax counsel. Please consult a licensed CPA for advice specific to your situation.