GST/HST Registration in Canada: The Complete Guide
Everything about getting registered, in one place — who must, who should, the four steps, the decisions inside the registration that quietly shape your filings for years, and how it all winds down if you ever close the account. This is the hub: the big topics link to deeper guides, and if you’d rather not manage any of it, BluTax registers and files for you.
Who must register
Registration becomes mandatory once your worldwide taxable sales exceed CAD $30,000 over four consecutive calendar quarters or in a single calendar quarter. The measure is sales, not profit; it counts zero-rated sales; and it’s combined across associated businesses — splitting one operation into two companies doesn’t reset it. The full mechanics, including how association is decided, are in our small supplier threshold guide.
Two groups skip the threshold entirely: taxi and commercial ride-share drivers register from the first dollar, and non-residents can be pulled in by physical presence — like inventory sitting in a Canadian fulfillment warehouse — regardless of revenue.
Who should register early
Below the threshold, registration is a choice — and often a good one. Voluntary registration recovers the GST/HST inside your startup costs (input tax credits — the tax you get back on business expenses) and reads as established to corporate clients. The price: you file every period from day one, including nil returns, and you generally commit to at least one year of registration. Our voluntary registration guide runs the full cost-benefit.
What you’ll need before you start
• Your business number, or be ready to get one at the same time
• A description of your business activity and its start date
• Estimated annual taxable sales
• Your preferred fiscal year-end
Step 1 — Get or confirm your business number
Your GST/HST account is an RT program account attached to a CRA business number (BN). Incorporating creates a corporate tax (RC) account automatically — it does not register you for GST/HST; that’s a separate step. No BN yet? It’s issued when you register. Full breakdown in our business number guide.
Step 2 — Choose your filing frequency
Annual, quarterly, or monthly — based on your revenue, with the option to elect a more frequent schedule. It looks like paperwork; it’s actually a cash-flow decision that sets how long you hold collected tax and how often refunds arrive. Choose deliberately, because changing later creates stub periods and confusion. Our filing frequency guide models the three options.
Step 3 — Set your effective date
If you’ve crossed the threshold, your effective date is the day you crossed — not the day you register. You then generally have about 29 days to register, and backdating means remitting tax from the crossing date even if you weren’t charging it yet. If a large purchase is coming and you’re registering voluntarily, the registration date belongs before the invoice date, so the credits flow.
Step 4 — Register
Most resident businesses register online through Business Registration Online (BRO), by phone, or by form. Non-residents follow a different path with an extra decision — simplified vs regular regime, which determines whether you can ever claim input tax credits. See our non-resident registration guide before choosing.
Sole proprietor, partnership, or corporation
The tax is the same; who registers differs. Sole proprietors register personally — one BN, with the $30,000 threshold measured across everything you do, the consulting and the Etsy shop combined (and self-employed individuals with a December 31 year-end get the special June 15 filing / April 30 payment dates). Partnerships register and file as the partnership — partners don’t separately charge tax on their share. Corporations are their own person, with their own BN and their own threshold.
Changing structure mid-stream means starting fresh: incorporating an existing sole proprietorship creates a new legal person — new BN, new GST/HST registration — and an asset transfer with its own tax treatment (an election can often make it tax-free for GST/HST; get advice before the transfer, not after). The old registration doesn’t ride along.
After you register
From your effective date you charge GST/HST at your customer’s provincial rate, keep documentation behind every credit you claim, and file every period — including nil returns, which still have deadlines. One more thing registration doesn’t do: it doesn’t cover Québec or the PST provinces. QST and PST are separate registrations with their own rules.
If you close the account later
Wound down the business, sold it, or dropped back under the threshold? You can cancel (deregister) — with two catches. Voluntary registrants generally must stay registered at least one year first. And deregistering while keeping business assets triggers a deemed disposition: you’re generally treated as having sold the capital property you hold — equipment, vehicles, inventory — and may have to remit GST/HST on its value, so price that in before cancelling.
The clean exit: file every outstanding return including nil periods, account for the deemed disposition, file the final return and pay any balance, then request cancellation (QST and PST accounts close separately). Don’t just stop filing — an abandoned account keeps accruing demands and penalties on a business that no longer exists. And keep your records; the six-year retention clock keeps running after closure.
When to hand it off
If you sell across provinces, are a non-resident, or simply don’t want to manage effective dates and deadlines, BluTax handles it end to end: registration for $125, filings from $75 per return, with QST and PST accounts set up where you need them — and a clean closure at the other end if the day comes.
Frequently asked questions
When do I have to register for GST/HST?
Once worldwide taxable sales exceed CAD $30,000 over four consecutive calendar quarters or in a single quarter — or immediately if you’re in a first-dollar category like ride-share, or caught by physical-presence rules as a non-resident.
Can I register before I reach $30,000?
Yes — voluntary registration is common to recover the GST/HST on startup costs. The trade-off is filing every period from registration onward, with a one-year minimum commitment.
Does incorporating register me for GST/HST?
No — incorporation creates a corporate tax (RC) account, but the GST/HST (RT) registration is a separate step for the new corporation.
Can I cancel my GST/HST registration?
Generally yes once you’ve ceased activity or fallen back under the threshold — though voluntary registrants usually must stay registered at least one year, and keeping business assets can mean remitting tax on a deemed disposition.
This page provides general information about Canadian sales tax and is not tax advice. Rates and thresholds are current as of drafting; BluTax confirms the specifics for each client’s situation.