AI agents for business finance: what they can and can't do
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The short answer
A Canadian business must register for GST/HST once its worldwide taxable supplies, including those of associates, pass $30,000 in a single calendar quarter or over four consecutive quarters (CRA, June 2026). Zero-rated sales, such as many services exported to clients in Nigeria, count towards that total. Below the threshold you are a small supplier and may still register voluntarily, which lets you claim input tax credits but means charging GST/HST to Canadian customers.
The small supplier threshold
The CRA's page on when to register (modified June 2026) sets the test at $30,000 of revenue from worldwide taxable supplies, before expenses. It includes the revenue of associated businesses and excludes financial services, sales of capital property and goodwill. The test runs on calendar quarters, the three-month periods starting in January, April, July and October, looked at singly and over four consecutive quarters.
Two details catch out diaspora founders. First, the figure is worldwide, so revenue from Nigerian, UK or US clients counts. Second, zero-rated supplies count too: Revenu Québec's small supplier page (updated November 2024) states that taxable supplies for the test include zero-rated ones. Many services sold to non-residents are zero-rated, which means a consultant billing mainly Lagos clients can pass the threshold while charging almost no GST/HST. See whether you charge GST/HST to a client in Nigeria.
Two ways to cross the line, two different start dates
| How you cross $30,000 | When you stop being a small supplier | Effective date of registration |
|---|---|---|
| In a single calendar quarter | On the supply that takes you over | No later than the date of that supply; charge GST/HST on it |
| Over four consecutive quarters (but not in one quarter) | At the end of the month after the quarter in which you crossed | No later than your first supply after that point |
The CRA's examples show registration generally due within 29 days of the effective date. If you register late, you may owe GST/HST on sales you made after the effective date even though you did not charge it, which comes out of your own margin.
Worked example
Example only. A Winnipeg data consultancy started in January. Its worldwide taxable sales, including zero-rated work for a Lagos bank, were:
| Quarter | Sales | Running four-quarter total |
|---|---|---|
| Jan–Mar | $6,000 | $6,000 |
| Apr–Jun | $9,000 | $15,000 |
| Jul–Sep | $11,000 | $26,000 |
| Oct–Dec | $7,500 | $33,500 |
No single quarter reached $30,000, but the four-quarter total crossed it during October to December (26,000 + 7,500 = 33,500). Under the four-quarter rule, the consultancy stops being a small supplier at the end of January, and its effective date of registration is no later than its first supply after that. Had it billed $31,000 in one quarter, it would have become a registrant on the very sale that crossed the line.
Registering voluntarily
Small suppliers making taxable supplies in Canada may register voluntarily. The CRA says the effective date is usually the day you request the account, or up to 30 days before. Reasons people do it early:
- Input tax credits. Only registrants claim ITCs on GST/HST paid on business costs, such as equipment, software and GST paid on imports. If most of your sales are zero-rated exports, registering can mean regular refunds.
- Credibility with Canadian clients. Some larger buyers expect a GST/HST number on invoices.
- No cliff edge. You avoid the scramble of registering mid-quarter when a big contract lands.
The cost is that you must charge GST/HST on taxable sales to Canadian customers and file returns. For a business selling mainly to Canadian consumers, who cannot claim the tax back, that can make prices less competitive.
Special cases
- Taxi and ride-sharing drivers must register from the first day of providing taxable passenger services, even as small suppliers.
- Charities and public institutions use a $250,000 gross revenue test and a $50,000 taxable supplies test.
- Quebec. Revenu Québec administers both GST and QST for Quebec businesses, with a $30,000 small supplier test; registering for QST also requires GST/HST registration, for a minimum of one year.
- Non-residents making taxable supplies in Canada in the course of business must register unless they are small suppliers, and generally post a security deposit.
Keeping a running check
The simplest control is a quarterly total, kept in a spreadsheet or your accounting software, of all taxable sales worldwide in CAD, with a column for the last four quarters added together. Include associated businesses if you own more than one company. Review it on the first working day of each quarter and when a large contract is signed, because a single invoice can push one quarter over the line on its own.
How to register
GST/HST is the RT program account on your business number. The CRA's Business Registration Online, which needs a CRA account, is the fastest route; form RC1 by mail is the alternative (CRA, October 2026). If you already have a business number for your company, you add the RT account to it. The steps are in getting a CRA business number for a new company. This article is information, not tax advice.
Where Pryme fits
Tracking the threshold is easier when revenue from each currency lands in one place. A Pryme Business Account receives NGN, USD, GBP and EUR with local details, and invoicing lets you show your GST/HST number once you have one. The Finance agent can prepare a quarterly sales summary for you to check against the $30,000 line; a person reviews it before anything is filed.
Questions people ask
What is the GST/HST small supplier threshold in 2026?
$30,000 of worldwide taxable supplies, including associates, in a single calendar quarter or over four consecutive quarters (CRA page modified June 2026).
Do sales to clients in Nigeria count towards $30,000?
Yes. The test is worldwide and includes zero-rated supplies, so exported services count even if you charge no GST/HST on them.
How long do I have to register after crossing the threshold?
The CRA's examples show registration generally within 29 days of the effective date, and the effective date depends on whether you crossed in one quarter or over four.
Should I register voluntarily before $30,000?
It can help if you buy a lot of taxable inputs or mainly make zero-rated sales, because you can claim ITCs. The trade-off is charging GST/HST to Canadian customers and filing returns.
Sources
- CRA: When to register for and start charging the GST/HST (modified 16 Jun 2026) · accessed Oct 2026
- Revenu Québec: Details concerning small suppliers (updated 22 Nov 2024) · accessed Oct 2026
- CRA: Input tax credits, GST/HST (modified 14 Oct 2026) · accessed Oct 2026
- CRA: Register as a resident with a Canadian business (modified 19 Oct 2026) · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.