If your Calgary business is growing, there comes a point where registering for the Goods and Services Tax / Harmonized Sales Tax (GST/HST) stops being optional and becomes a legal requirement. Whether you have just crossed the threshold or are proactively planning ahead, understanding exactly how to register — and what your obligations are afterward — will save you time, money, and potential penalties from the CRA.
This guide walks you through everything: who must register, who should register voluntarily, and the exact steps to complete your GST/HST registration online in 2025.
The registration requirement comes down to one key figure: $30,000 in taxable supplies. The CRA defines you as a small supplier — and therefore exempt from mandatory registration — if your total worldwide taxable revenues (before GST/HST) are $30,000 or less. The moment you exceed that threshold, you are legally required to register.
The $30,000 test applies in two ways:
Once you are required to register, you must start collecting and remitting GST/HST immediately. There is no grace period after you cross the threshold.
Certain businesses must register for GST/HST no matter how little they earn. Taxi operators and rideshare drivers (including platforms like Uber and Lyft) are required to register from their very first fare. This rule applies to anyone providing passenger transportation services for a fare, with no small supplier exemption available.
Non-resident businesses supplying digital products or services to Canadians may also face mandatory registration requirements under a simplified framework introduced in recent years.
If your annual taxable revenues are under $30,000, you qualify as a small supplier and registration is optional. Many small businesses and sole proprietors choose to stay unregistered to avoid the administrative burden of collecting and filing GST/HST returns.
However, voluntary registration can be a smart financial move — particularly for capital-intensive startups and early-stage businesses. Here is why:
When you register for GST/HST, you become eligible to claim Input Tax Credits (ITCs). ITCs allow you to recover the GST/HST you paid on business purchases and expenses. If you are investing heavily in equipment, technology, leasehold improvements, or inventory before your revenue is significant, those ITCs can add up quickly and meaningfully reduce your costs.
For example, a new construction company purchasing $200,000 in tools and materials will pay roughly $10,000 in GST. Without registration, that $10,000 is simply a cost. With voluntary registration, it becomes a recoverable credit.
The trade-off is that you must charge GST/HST on your own sales, which may affect pricing competitiveness if your customers are end consumers who cannot claim ITCs. For B2B businesses, voluntary registration is almost always advantageous from day one.
The fastest and most straightforward way to register is through the CRA's online portal. Here is the complete process:
Go to the CRA website and navigate to My Business Account. If you do not already have access, you will need to register using your Social Insurance Number, date of birth, and your most recent tax return information. You can also use a Sign-In Partner (such as your bank login) if that option is available to you.
Once logged in, look for the option to register a new program account. Choose GST/HST from the list of available program accounts. If your business does not yet have a Business Number (BN), the system will create one for you automatically during this process.
You will be prompted to provide:
Your GST/HST fiscal year does not have to match your income tax year-end, but it often makes sense to align them. Incorporated businesses typically use their corporate year-end. Sole proprietors default to December 31st. You can elect a different fiscal year-end if your business has seasonal cash flow patterns that make another date more practical.
The CRA assigns a default reporting period based on your revenue, but you can often elect a different frequency:
Fast-growing businesses sometimes elect monthly reporting voluntarily to keep remittances manageable and avoid a large annual payment.
After reviewing your information, submit the registration. In most cases, the CRA issues your Business Number immediately online. Your GST/HST account number will be in the format: 9 digits + RT + 0001 (for example, 123456789 RT 0001). The "RT" designator identifies this as your GST/HST program account. If your business later needs additional GST/HST accounts — for example, for a distinct division — those would be numbered RT 0002, RT 0003, and so on.
If you prefer not to register online, two other options are available:
Registration is not the finish line — it is the starting line. From your effective registration date, you are required to charge and collect GST/HST on all taxable supplies. Failing to charge GST/HST when you are registered does not eliminate your obligation to remit; the CRA can assess you for GST/HST that should have been collected even if you never charged it.
Your first return is due based on your reporting period: within three months of your fiscal year-end for annual filers, or one month after the end of your first quarter or month for quarterly and monthly filers. Filing late results in penalties and interest, so it is worth setting reminders well in advance of each due date.
Once registered, most small businesses are eligible to elect the Quick Method of accounting for GST/HST. Rather than tracking GST/HST collected and ITCs in detail, the Quick Method allows you to remit a flat percentage of your GST/HST-inclusive revenues. The remittance rates vary by business type and province, but the method almost always reduces the amount you remit and dramatically simplifies your bookkeeping. The election must be made in writing to the CRA by the due date of your first return.
Note that businesses providing legal, accounting, actuarial, financial, or consulting services are generally not eligible for the Quick Method, so confirm eligibility before making the election.
Choosing the wrong effective date, selecting an ill-suited reporting period, or missing your first filing deadline can all create headaches that are costly to correct. The team at Swift Accounting Calgary handles GST/HST registrations regularly — from straightforward sole proprietor setups to more complex situations involving multiple entities, non-resident vendors, or retroactive registrations.
If you are unsure whether you need to register now, whether voluntary registration makes financial sense for your situation, or simply want someone to handle the CRA paperwork correctly, contact Swift Accounting today for a straightforward conversation with a Calgary accounting professional who knows the rules.
Yes, the $30,000 threshold applies to your total taxable revenues from all clients combined — not per client or per contract. Add up all income from taxable supplies across all your clients in any single calendar quarter or over four consecutive quarters. Once that total exceeds $30,000, mandatory registration applies regardless of how many clients contribute to that figure.
Yes. The CRA allows you to backdate your effective registration date to the day you first became required to register. This is important if you crossed the threshold some time ago and have not yet registered — backdating allows you to also claim ITCs on past purchases, which can partially offset any GST/HST you should have been collecting. Voluntary registrations can also be backdated, though generally no further back than four years.
In the majority of cases, your Business Number and GST/HST account number are issued immediately when you complete the online registration through My Business Account. In some situations — particularly for new businesses that do not yet have a BN — the CRA may take a few business days to process and confirm your account. You should retain your confirmation number and follow up if you do not receive written confirmation within two weeks.
The CRA can register you retroactively and assess GST/HST you should have collected, plus interest and penalties. In practice, this most often comes up during a CRA audit or review. Voluntary disclosure — coming forward before the CRA contacts you — typically results in interest relief and reduced penalties, so if you realize you should have registered earlier, it is worth addressing proactively rather than waiting for the CRA to find it first. Swift Accounting can advise you on the voluntary disclosure process if you are in this situation.
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