GST/HST Registration in Canada 2026 — When to Register and How

What Is GST/HST?

The Goods and Services Tax (GST) is a federal consumption tax of 5% that applies to most goods and services sold or provided in Canada. In five provinces — Ontario, Nova Scotia, New Brunswick, Prince Edward Island and Newfoundland and Labrador — the federal GST is combined with the provincial sales tax into a single Harmonized Sales Tax (HST). In the remaining provinces and territories, GST applies separately alongside a provincial sales tax administered by the province itself.

GST/HST is a value-added tax — meaning it is applied at each stage of the supply chain but only the final consumer bears the full economic burden of the tax. Registered businesses collect GST/HST from their customers and remit the collected amount to the Canada Revenue Agency (CRA), minus Input Tax Credits (ITCs) for the GST/HST they paid on their own business purchases. The difference between collected tax and paid tax is the net amount remitted.

For a Canadian business, GST/HST registration creates both obligations (collecting and remitting tax, filing returns) and a valuable benefit (claiming ITCs to recover tax paid on business expenses). Understanding when you must register — and when you should register voluntarily — is one of the most important early decisions for any new Canadian business.

The $30,000 GST/HST Registration Threshold

In Canada, a business is generally not required to register for GST/HST unless its total taxable supplies exceed $30,000 in a single calendar quarter or over four consecutive calendar quarters. Below this threshold, the business is classified as a small supplier and has no obligation to register, collect or remit GST/HST.

The $30,000 threshold is one of the most commonly misunderstood rules in Canadian tax. Business owners frequently confuse it with annual revenue — but the test applies to four consecutive calendar quarters that do not have to align with a fiscal year. A business that earns $29,000 in every one of those four quarters has technically earned $116,000 without triggering mandatory registration — because no single quarter exceeded $30,000 and the four-quarter rolling total test only applies if a single quarter threshold has been breached.

How the $30,000 Threshold Is Calculated

The $30,000 threshold applies to taxable supplies — not all revenues. Taxable supplies include most goods and services sold in Canada at either the standard GST/HST rate or the 0% rate (zero-rated supplies). Exempt supplies — such as residential rent, healthcare services and most financial services — do not count toward the threshold.

When you are calculating whether you have crossed the threshold, include revenues from all associated businesses. CRA requires you to aggregate revenues from associated persons and corporations. If you own two businesses that together exceed $30,000 in taxable supplies, both must register even if individually they are below the threshold.

The Small Supplier Exemption — Who Qualifies and What It Means

A business that has not exceeded the $30,000 threshold is a small supplier under the Excise Tax Act. Small suppliers are exempt from the obligation to register, collect or remit GST/HST. This is a legitimate exemption — it is not evasion. Many very small businesses, freelancers and part-time service providers qualify as small suppliers throughout their entire business life.

Being a small supplier means you do not charge GST/HST on your invoices — and you also cannot claim Input Tax Credits for GST/HST paid on your business expenses. If you are paying significant amounts of GST/HST on business purchases (equipment, software, office supplies), you may be leaving recoverable tax on the table by staying unregistered. This is one of the main reasons voluntary registration can be beneficial even below the threshold.

Small supplier status is lost immediately once the threshold is crossed in a single calendar quarter — there is no grace period to continue as unregistered after the date the threshold was breached within a quarter. For the four-quarter cumulative test, you have until the end of the month following the calendar quarter in which the $30,000 threshold was exceeded.

Voluntary Registration — Why It Can Benefit Your Business

A small supplier below the $30,000 threshold can choose to register for GST/HST voluntarily. There is no minimum revenue requirement to voluntarily register. Voluntary registration gives your business the ability to claim Input Tax Credits on business expenses immediately — recovering 5% to 15% of every dollar spent on GST/HST-subject purchases.

When Voluntary Registration Makes Sense

Voluntary registration is generally beneficial when your business incurs significant GST/HST-taxable expenses. The larger the gap between what you spend (and pay GST/HST on) and what you earn, the more valuable voluntary registration becomes. It is particularly useful during the start-up phase — when you are spending heavily on equipment, software, office setup, professional fees and marketing before your revenue reaches meaningful levels.

The Competitive Consideration for Small Businesses

When you register for GST/HST, you must add the applicable tax to your invoices. If your clients are themselves registered businesses, this creates no competitive disadvantage — they simply claim the HST as an ITC and it costs them nothing. However, if your primary customers are individual consumers who cannot recover HST, adding 13% to your Ontario invoices effectively makes your service more expensive. This is a genuine business decision that depends on your pricing power, client type and margin structure.

Who Must Register for GST/HST — Complete List

Registration is mandatory for any business that meets any of the following conditions:

Businesses That Are Exempt from Registering

Certain businesses are not required to register for GST/HST regardless of revenue level. These fall into two categories: businesses below the small supplier threshold (covered above) and businesses whose activities consist entirely of exempt supplies.

It is important to note that even if your core activity is exempt, you may have taxable activities alongside it. A doctor who also rents commercial space has taxable rental income. A financial institution that provides investment counselling may have a mix of exempt and taxable supplies. The ITC rules for partially exempt businesses are complex — only ITCs related to taxable activities are fully claimable.

How to Register for GST/HST — Step by Step

GST/HST registration is free and takes 5 to 30 minutes depending on the method. CRA provides three ways to register: online through My Business Account or Business Registration Online, by phone, or by mail. For most businesses, online registration is the fastest and most practical option.

What You Need to Register for GST/HST

CRA requires the following information to complete your GST/HST registration. Having this ready before you start will make the process faster.

Choosing Your GST/HST Registration Effective Date

The effective date of your GST/HST registration is the date from which you are required to charge and collect GST/HST on your sales. It also determines the earliest date from which you can claim Input Tax Credits. Choosing the right effective date has real financial implications.

For Mandatory Registration

If you are registering because you exceeded the $30,000 threshold, your effective date is the date you crossed the threshold — not the date you applied to register. If you delayed registering after crossing the threshold, CRA can require you to remit GST/HST on sales made from the mandatory registration date, even if you did not collect it from customers. You bear the tax liability for the period you should have been registered but were not.

For Voluntary Registration

If you are voluntarily registering before reaching the threshold, you can generally choose any effective date — including retroactively up to 30 days before your application date. Choosing an earlier effective date allows you to claim ITCs on purchases made before your application. If you purchased significant business assets in the previous month, it may be worth choosing an effective date that captures those purchases for ITC purposes.

Provincial GST/HST Rates 2026 — All Provinces and Territories

Canada uses two different systems for consumption taxes. In HST provinces, a single harmonized rate applies and a single registration covers both the federal and provincial components. In non-HST provinces, only the federal 5% GST applies through your CRA registration — the provincial sales tax (PST, QST or RST) is a separate provincial obligation administered by the province itself.

Place of Supply Rules — Which Province's Rate Applies?

When you make a taxable supply across provincial lines, the GST/HST rate that applies depends on where the supply is considered to be made — not where you, the supplier, are located. These are the Place of Supply rules, and they determine whether you charge 5% (GST only) or the applicable HST rate of the destination province.

The general rule is that the applicable rate is determined by where the supply is delivered or made available to the recipient. For services, the place of supply is generally where the service is performed or where the recipient is located, depending on the type of service. For intangible personal property and digital services, the rules depend on who the recipient is and where they typically reside.

After Registration — What Changes and What You Must Do

Once registered, your obligations begin immediately from the effective date. Here is a complete checklist of what changes and what you need to action after receiving your GST/HST number.

Immediate Actions After Registration

• Update all invoices to include your GST/HST registration number and the applicable tax amount clearly stated
• Configure your accounting software (QuickBooks Online, Xero) to track GST/HST collected on sales and GST/HST paid on purchases separately
• Inform your clients who receive regular invoices that you are now registered and will be adding HST
• Begin tracking Input Tax Credits — keep original receipts and invoices for all business purchases with GST/HST breakout clearly visible
• Note your first filing due date based on your assigned reporting period

Invoice Requirements After Registration

Registered businesses must provide certain information on invoices to allow clients to claim ITCs. For invoices over $30, the following information is required:

• Your legal or operating business name
• Your GST/HST registration number (15-character Business Number with RT0001)
• The date of the invoice
• A description of the goods or services provided
• The total amount charged — or the total amount before tax and the GST/HST amount shown separately

For invoices over $150, the above information plus the recipient's name and a breakdown of the tax rate applied to each type of supply is required. Without these details on your invoices, your clients may not be able to claim the ITCs they are entitled to — which creates friction in business relationships.

Input Tax Credits (ITCs) — Recovering GST/HST You Paid

An Input Tax Credit is the GST/HST you paid on business purchases and expenses that you are entitled to recover from CRA. ITCs are the fundamental benefit of being GST/HST registered — they effectively make your business purchases tax-free by recovering the GST/HST component on your periodic return.

You may claim an ITC for any GST/HST you paid on goods or services that you acquired for use, consumption or supply in the course of making taxable commercial activities. The ITC reduces your net tax remittance. If your ITCs in a period exceed your collected GST/HST, you receive a refund from CRA — which is particularly valuable during start-up phases or when making large capital purchases.

Common Business Expenses Where ITCs Are Claimable

GST/HST Filing Frequency — Which Applies to Your Business

CRA assigns a filing frequency based on your annual taxable revenues. You can always elect to file more frequently than your assigned period — which can be beneficial if you regularly receive net refunds (your ITCs exceed collected HST). You cannot file less frequently than your assigned period without CRA approval.

The Quick Method of Accounting for GST/HST

The Quick Method is a simplified way for eligible small businesses to calculate and remit GST/HST. Instead of tracking every individual ITC, you remit a fixed percentage of your total GST/HST-inclusive sales. This percentage is lower than the standard rate, with the difference representing a flat ITC offset for typical business expenses.

The Quick Method is only available to businesses with annual taxable revenues under $400,000 (excluding zero-rated exports). Businesses must also be making taxable supplies for at least one year before electing the Quick Method, and must file a formal election with CRA.

The Quick Method simplifies compliance significantly for small service businesses — eliminating the need to track every purchase receipt for ITC purposes. However, it is not always more beneficial than the regular method. A business with significant input costs may recover more through actual ITC claims than the flat offset the Quick Method provides. A licensed accountant can model both approaches to determine which results in lower net HST remittance for your specific cost structure.

Zero-Rated vs. Exempt Supplies — A Critical Distinction

Both zero-rated and exempt supplies do not result in the business collecting GST/HST from customers — but the similarity ends there. The distinction between them has significant implications for ITC claims and registration obligations.

Common Zero-Rated Supplies

• Most basic groceries (unprocessed food items)
• Prescription drugs and most medical devices
• Exports of goods and services to non-residents outside Canada
• International transportation services
• Certain agricultural and farming supplies
• Feminine hygiene products

Common Exempt Supplies

• Long-term residential rent
• Most healthcare services (physicians, dentists, physiotherapists)
• Most educational services (tuition fees at registered institutions)
• Most financial services (lending, deposit-taking, trading in securities)
• Childcare services
• Legal aid services

Non-Residents and GST/HST Registration

Non-residents carrying on business in Canada are generally required to register for GST/HST if they make taxable supplies in Canada — subject to the same $30,000 threshold that applies to Canadian businesses. However, the rules for non-residents are more complex and depend on whether the non-resident has a permanent establishment in Canada, what type of supplies are being made, and where the customers are located.

Digital Economy Rules — Effective July 2021

Significant changes to GST/HST rules for non-resident digital businesses came into effect on July 1, 2021. Non-resident businesses supplying digital products and services to Canadian consumers are now required to register for and collect GST/HST regardless of whether they have a physical presence in Canada. This affects:

• Foreign streaming services (video, music, gaming)
• App stores and digital platform operators
• Foreign software and SaaS providers
• Online marketplaces facilitating Canadian sales
• Short-term accommodation platforms

Non-resident registrations are managed through a simplified GST/HST registration process for non-residents under Division IV.1 of the Excise Tax Act. Non-residents registered through this simplified process collect and remit GST/HST but do not claim ITCs through that account.

Penalties for Not Registering When Required

Failing to register for GST/HST when required — or registering late — creates a liability for the GST/HST you should have collected and remitted during the unregistered period. CRA takes the position that if you should have been registered, the tax was owing from the date you crossed the threshold regardless of whether you collected it from customers.