Most self-employed Albertans don't register for GST until they have to — but waiting too long (or not registering at all) can be a costly mistake. If you're self-employed in Alberta, GST is something you need to understand from day one to avoid surprises.
The $30,000 Threshold — How It Works
In Canada, you must register for GST once your total taxable revenues exceed $30,000 over four consecutive calendar quarters. Below that, you're a "small supplier" and registration is typically optional.
The 29-Day Rule
The moment you cross $30,000 — even if it happens mid-year — you're legally required to register within 29 days. Not at your next tax filing. Within 29 days.
Immediate Registration Exceptions
The $30,000 rule has strict exceptions. You must register immediately if:
- Rideshare Drivers: Uber, Lyft, and taxi drivers must register from day one.
- Large Transactions: Any single taxable sale over $30,000 in one quarter.
- Proactive Growth: Any business that expects to exceed $30,000 quickly.
Handing Money Back to You
Registering voluntarily before you hit $30,000 allows you to claim Input Tax Credits (ITCs). This means you recover the GST you paid on equipment, software, and professional fees. If your expenses are high, this actually puts money back in your pocket.
How to Register & Manage GST
Registration is managed through the CRA's Business Registration Online. Once you have your number, you must:
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Update Your Invoices
Add the 5% Alberta GST to all taxable invoices separately.
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Track Collections
Keep a clear record of every dollar of GST you collect from clients.
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Track Your ITCs
Record the GST you pay on business-related expenses to offset your liability.
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File on Time
Remit the net amount (Collected GST minus ITCs) on your assigned schedule (annual, quarterly, or monthly).
The "Alberta Math"
Alberta is GST-only (5%). For every $1,000 you invoice, add $50 in GST. You collect that $50 and remit it minus your business-related GST credits.
Mistakes to Avoid
Don't wait until you get a letter. The CRA can assess you for GST you should have collected even if you didn't charge it. This means the money comes out of your own profit.
Pricing Strategy Tip
Build GST into your business plan early. If you suddenly add 5% to your rates mid-contract, it can lead to awkward client conversations. Plan for registration before you hit the threshold.