HST Small Supplier Threshold Canada 2026: When You Must Register ($30K Rule Explained)
Reviewed by Bader A. Chowdry, CPA, CA, LPA on
If you run a Canadian business, the single number that decides whether you must charge sales tax is $30,000. Cross it the wrong way and the Canada Revenue Agency (CRA) treats you as a GST/HST registrant whether or not you actually signed up — and you can be liable for tax you never collected. This guide explains the small-supplier rule for 2026, both threshold tests, and exactly when the clock starts.
What is the GST/HST small supplier threshold in Canada for 2026?
A business is a small supplier — and is not required to register for or charge GST/HST — as long as its worldwide taxable revenue stays at or below $30,000 over the relevant period. The figure comes from section 148 of the Excise Tax Act, is not indexed to inflation, and applies the same way across every province in 2026.
The CRA measures the threshold against the total value of consideration for your worldwide taxable supplies, not your profit. Two separate tests apply, and tripping either one ends your small-supplier status. The detail of each is below. (See the CRA’s General Information for GST/HST Registrants (RC4022) for the governing administrative position.)
How is the four consecutive calendar quarters test calculated?
Add up your taxable revenue across the last four consecutive calendar quarters (a rolling 12-month window, not your fiscal year). If that running total stays at or under $30,000 you remain a small supplier. If it climbs above $30,000 — but you did not exceed the limit in any single quarter — you stop being a small supplier at the end of the month following that quarter.
In practice that gives you a short grace period: you continue as a small supplier through the quarter you crossed in, plus one extra month, then you must register and begin charging tax. The CRA explains the calculation in its Small suppliers memorandum (GST/HST Memorandum 2.2).
What happens if I exceed $30,000 in a single calendar quarter?
This is the harsher test. If a single sale pushes your taxable revenue over $30,000 within one calendar quarter, you cease to be a small supplier immediately — effective on that sale. There is no grace month. You must charge GST/HST on the supply that put you over the line, and you generally have 29 days to register.
Many owners are caught here by one large invoice. Because the change is immediate, the tax on that breakthrough sale is yours to remit even if you forgot to add it to the invoice. The registration mechanics are set out in section 240 of the Excise Tax Act and the CRA’s When to register for and start charging GST/HST guidance.
Does employment income count toward the $30,000 threshold?
No. Employment income (T4 wages) is not a taxable supply for GST/HST purposes, so it never counts toward the $30,000 limit. Only revenue from your commercial activity — self-employment, your corporation’s sales, freelance and contract work, rental of commercial property, and most goods and services — is included in the test.
What types of revenue count toward the threshold?
Count your worldwide taxable supplies, including zero-rated sales (such as exports and basic groceries, which are taxable at 0%). Exclude exempt supplies — residential rent, most financial services, and certain health and education services — along with sales of capital property and goodwill on the sale of a business.
- Counts: product sales, professional and consulting fees, most digital services, commercial rent, and zero-rated exports.
- Excluded: exempt supplies, capital-property sales, goodwill, and employment (T4) income.
Can I register for GST/HST voluntarily before reaching $30,000?
Yes. A small supplier engaged in commercial activity in Canada can register voluntarily at any time. The main reason to do so is to recover input tax credits (ITCs) — the GST/HST you pay on equipment, software, professional fees, and other start-up and operating costs. For a business with heavy early spending or mostly registered-business customers, that recovery can outweigh the administrative cost.
Voluntary registration usually takes effect on the day you apply, though the CRA will accept an effective date up to 30 days earlier. Once registered, you must charge tax and file returns even if you later drop below $30,000.
What are the penalties for registering late?
If you should have registered but did not, the CRA can assess the GST/HST you should have collected — often 13% of your Ontario sales — plus interest and, in some cases, a failure-to-file penalty. Because the tax becomes your liability whether or not you charged your customers, late registration is one of the most expensive bookkeeping mistakes a growing business makes.
Which provinces use HST, and how does Quebec’s QST fit in?
Five provinces — Ontario (13%), Nova Scotia, New Brunswick, Newfoundland and Labrador, and Prince Edward Island — use the Harmonized Sales Tax, a single combined federal-provincial tax administered by the CRA. The remaining provinces and territories charge 5% GST, sometimes alongside a separate provincial sales tax (PST).
Quebec runs its own parallel system: the federal GST plus the Quebec Sales Tax (QST), administered by Revenu Québec. The QST small-supplier threshold mirrors the federal $30,000 figure, but you register and report separately with Revenu Québec. You can compare the current rates on the CRA’s GST/HST rate by province page.
Worked example: the consultant who crossed in one quarter
A Mississauga IT consultant billed $8,000 per quarter through 2025 — comfortably a small supplier. In Q2 2026 she landed a single $34,000 project. That one invoice pushed her over $30,000 in a single calendar quarter, so she ceased to be a small supplier on the date of that sale. She had to charge 13% Ontario HST on the $34,000 (about $4,420), register within 29 days, and — the silver lining — she could then claim ITCs on her laptop, software subscriptions, and home-office costs back to her effective date. Had she registered voluntarily a quarter earlier, the HST on that project would have been a clean line item rather than a surprise liability.
Not sure which test you have tripped?
Getting the timing right protects your margins and keeps you off the CRA’s late-registration list. Insight Accounting CPA helps Ontario owner-managers confirm their registration date, set up GST/HST filing, and capture every input tax credit they are owed. See what an engagement costs on our CPA cost in Ontario guide, review our pricing, or start with a free call below.
Important — informational only, not advice. Do not use this article to make any decision.
This article is published by Insight Accounting CPA Professional Corporation for general educational purposes only. It is not tax, legal, accounting, financial, or investment advice, and nothing in this article should be relied upon — by anyone, for any purpose — to make a business, tax, financial, accounting, legal, or investment decision.
Tax law, CRA administrative positions, court interpretations, and Ontario provincial rules change frequently, sometimes retroactively, and the content of this article may be incomplete, simplified, out of date, or wrong by the time you read it. The right answer for your specific situation depends on facts this article does not know — your structure, history, jurisdiction, filings, contracts, and goals.
Before acting, engage your own Chartered Professional Accountant or qualified advisor who has reviewed your specific circumstances in writing. Insight Accounting CPA Professional Corporation, the author, and any contributors expressly disclaim all liability — direct, indirect, or consequential — for any action taken or not taken on the basis of this content.
Insight Accounting CPA Professional Corporation is led by Bader A. Chowdry, CPA, CA, LPA — licensed by CPA Ontario under the Public Accounting Act, 2004. To engage us for situation-specific advice, book a free 30-minute discovery call.
