You must register for GST/HST once your business earns $30,000 in worldwide taxable revenue over four consecutive calendar quarters. Below that, you are a small supplier and registration is optional. Most growing businesses benefit from registering voluntarily, because it lets you claim back the GST/HST you pay on expenses.
The $30,000 threshold is the line most business owners ask about, but it is not the whole story. There are exceptions where you must register from day one, situations where voluntary registration saves you money, and a few business types that are exempt entirely. At Gondaliya CPA, we handle GST/HST registration and ongoing filing so you stay compliant and recover every input tax credit you are owed.
The $30,000 Small Supplier Threshold
You are a "small supplier" and do not have to register if your total worldwide taxable revenue is $30,000 or less over four consecutive calendar quarters. Once you exceed $30,000, you must register and begin charging GST/HST.
| Situation | Registration Requirement |
|---|
| $30,000 or less in 4 consecutive quarters | Optional (small supplier) |
| Over $30,000 in a single calendar quarter | Mandatory, effective immediately |
| Over $30,000 across 4 consecutive quarters | Mandatory, within 29 days |
| Taxi or ride-share driver | Mandatory from day one |
| Non-resident selling into Canada | Mandatory in many cases |
Watch the Single-Quarter Rule: If you exceed $30,000 in one single calendar quarter, you are no longer a small supplier and must register and charge GST/HST immediately on the sale that pushed you over. Many owners miss this and only watch the four-quarter total.
When Registration Is Mandatory From Day One
Some businesses must register regardless of revenue. The most common is taxi and commercial ride-share drivers, who are required to register before they start. Non-resident businesses selling goods or digital products into Canada often must register as well. If you are unsure which category you fall into, it is worth confirming before you start invoicing.
Why Voluntary Registration Often Makes Sense
Even under the $30,000 threshold, registering voluntarily can put money back in your pocket. Once registered, you can claim input tax credits (ITCs), which recover the GST/HST you pay on business purchases such as equipment, software, inventory, supplies and professional fees.
- You recover GST/HST on expenses. Startup and equipment costs often carry significant tax you can claim back once registered.
- You look established. Many corporate and government clients expect to deal with a registered, tax-charging supplier.
- You avoid a scramble later. Registering early means you are not rushing to comply the moment you cross $30,000 mid-year.
- It is reversible in spirit. If your situation changes, deregistration is possible, though there are rules around timing and recapture.
The Trade-Off: Once registered, you must charge GST/HST on your sales and file returns on time. For a business selling mostly to other registered businesses, this is usually a net win because your customers claim the tax back too. For a business selling to consumers, charging tax can make you slightly less price-competitive, so the decision depends on who your customers are.
What Rate Do I Charge?
You charge based on where your customer is, not where you are. Ontario is 13% HST, Alberta is 5% GST only, and the Maritime provinces are 15% HST. Selling across provinces means applying the destination province's rate, which is one of the most common areas where businesses get it wrong.
Case Study: Toronto Consultant
A new consultant in Toronto stayed unregistered to keep things simple, then landed a large corporate client and crossed $30,000 in a single quarter without realizing the rule applied. We registered them effective the correct date, recovered roughly $3,800 in input tax credits on their startup equipment and software, and set up quarterly HST filing so they stayed onside going forward.
$3,800 in ITCs recovered. Registered correctly. Filing automated.
How to Register for GST/HST
Registration is done through the CRA, online via Business Registration Online, by phone, or through your accountant. You will receive a GST/HST account number under your business number. Once registered, you start charging tax on taxable sales and filing returns on your assigned schedule. Our GST/HST registration service handles the registration and sets up your ongoing filing so nothing is missed.
Frequently Asked Questions
Do I need GST/HST registration for my business in Canada?
You must register once your business earns $30,000 in worldwide taxable revenue over four consecutive calendar quarters. Below that you are a small supplier and registration is optional, though voluntary registration often saves money by letting you claim input tax credits.
What is the $30,000 small supplier threshold?
If your total worldwide taxable revenue is $30,000 or less over four consecutive calendar quarters, you are a small supplier and do not have to register. Once you exceed it, registration becomes mandatory.
What counts toward the $30,000?
Your worldwide taxable and zero-rated revenue, before expenses. It does not include exempt supplies, financial services or sales of capital property. It is gross revenue, not profit.
What happens if I exceed $30,000 in one quarter?
You immediately stop being a small supplier and must register and charge GST/HST on the sale that pushed you over the threshold. This single-quarter rule catches many business owners off guard.
What if I exceed $30,000 over four quarters?
You must register within 29 days of the day you exceeded the threshold. Your effective date of registration is generally the day you stopped being a small supplier.
Do I have to register from day one in any case?
Yes. Taxi and commercial ride-share drivers must register before starting, regardless of revenue. Many non-resident businesses selling into Canada must also register from the start.
Should I register voluntarily under $30,000?
Often yes. Voluntary registration lets you claim input tax credits on business expenses, which can recover significant GST/HST on startup and equipment costs. It is especially worthwhile if you sell mostly to other registered businesses.
What are input tax credits?
Input tax credits (ITCs) let a registered business recover the GST/HST it pays on business purchases such as equipment, software, inventory, supplies and professional fees. You net these against the tax you collect.
What is the downside of registering?
You must charge GST/HST on your sales and file returns on time. For businesses selling to consumers, charging tax can make you slightly less price-competitive. For B2B sellers it is usually a net benefit.
What rate of GST/HST do I charge?
You charge based on the customer's province: 13% HST in Ontario, 5% GST in Alberta, 15% HST in the Maritimes. Selling across provinces means applying the destination province's rate.
What is the difference between GST and HST?
GST is the 5% federal tax. In provinces that harmonized it with their provincial sales tax, it becomes HST at a combined rate, such as 13% in Ontario. Other provinces charge GST plus a separate provincial sales tax.
Are any businesses exempt from GST/HST?
Certain supplies are exempt, including most health and dental services, many educational services, child care, and most residential rent. Businesses making only exempt supplies generally cannot register or claim ITCs.
What does zero-rated mean?
Zero-rated supplies are taxable at 0%, such as basic groceries, most exports and certain medical devices. You charge 0% but can still claim input tax credits on related expenses, which is a benefit over exempt supplies.
Do I charge GST/HST on exports to the US?
Exports of goods and services to customers outside Canada are generally zero-rated, so you charge 0% but still claim ITCs. US state sales tax may apply separately depending on nexus.
How do I register for GST/HST?
Through the CRA online via Business Registration Online, by phone, or through your accountant. You receive a GST/HST account number under your business number. We handle this for clients.
GST/HST Registration →When does my registration take effect?
Generally the day you stop being a small supplier, or an earlier voluntary date you choose. The effective date determines from when you must charge tax and can claim ITCs.
How often do I file GST/HST returns?
Annually, quarterly or monthly depending on your revenue. Smaller businesses usually file annually or quarterly. The CRA assigns a frequency, which can sometimes be changed.
HST Filing →What is the Quick Method?
A simplified filing option for eligible small businesses that lets you remit a lower flat percentage of sales instead of tracking every ITC. It can save money for service businesses with low expenses. We assess if it fits.
What if I registered but stayed under $30,000?
That is fine. Once registered you simply charge and file as normal. You can deregister later if eligible, subject to rules on timing and recapturing ITCs on remaining assets.
Can I deregister later?
Yes, if you become a small supplier again and meet the conditions. There can be a recapture of ITCs previously claimed on assets you still hold, so it is worth reviewing before you do it.
What happens if I should have registered but did not?
The CRA can assess the GST/HST you should have collected, plus penalties and interest, even if you never charged it to customers. Registering late and correcting it promptly limits the damage.
Do I charge GST/HST before I am registered?
No. You only charge once registered and from your effective date. Charging tax without being registered is not permitted. This is why getting the registration date right matters.
Does my business number include GST/HST?
Your business number is the base. The GST/HST account is a program account added to it, ending in RT0001. You can hold payroll and other accounts under the same business number.
Do sole proprietors need to register?
The same $30,000 rule applies to sole proprietors and corporations. As a sole proprietor your worldwide taxable revenue across all your business activities counts toward the threshold.
Do I need to register in every province I sell to?
For GST/HST, no. One CRA registration covers GST/HST nationwide. However, separate provincial sales taxes such as QST in Quebec, or PST in BC, Saskatchewan and Manitoba, may require their own registration.
What records do I need to keep?
Sales invoices showing GST/HST charged, purchase receipts supporting ITCs, and your filed returns. Good records are essential to support your ITC claims if the CRA reviews them.
How much does registration and HST filing cost?
Registration is a one-time setup we handle for you, and ongoing HST filing is included with monthly bookkeeping. All fees include HST.
Bookkeeping →Are your fees inclusive of HST?
Yes. All quoted fees include HST, so the number you are quoted is the number you pay.
Do you serve businesses outside Toronto?
Yes. We handle GST/HST registration and filing for businesses across the GTA and all of Ontario and Canada virtually, with the same flat-fee pricing.
How do I get started?
Book a free consultation or use our fee calculator. We confirm whether you need to register, register you correctly, and set up your filing.
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