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GST on invoices in Alberta: a plain-English guide

Alberta keeps it simpler than most provinces: 5% GST and no PST. But registration timing, invoice details and out-of-province work still trip people up.

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General information, not tax advice. The CRA pages linked below are the authority. Check them or ask your accountant about your situation.

Do you have to register?

You're a small supplier, and don't have to register, as long as your taxable sales (with associated businesses) stay at $30,000 or less over the last four calendar quarters and in any single calendar quarter.

You can register voluntarily below $30,000, which lets you claim input tax credits (ITCs) on GST you pay. Many trades and oilfield businesses do, because their business customers expect a GST number anyway.

The rate

In Alberta it's 5% GST with no provincial sales tax. When you bill for work done or goods delivered in an HST province, the HST rate of that province generally applies (for example 13% in Ontario, 14% in Nova Scotia, 15% in New Brunswick, Newfoundland and Labrador, and PEI). The "place of supply" rules decide which rate. Check the CRA calculator and rules before invoicing out-of-province work.

What your invoice should show

Your customers can only claim ITCs if your invoice has the right details. The CRA's requirements step up with the total:

Invoice total Must show
Under $100 Your business name, the invoice date, the total amount
$100 to $499.99 All of the above plus your GST/HST registration number, and the GST charged (or that the total includes GST)
$500 or more All of the above plus the customer's name, a description of what was supplied, and payment terms

Every mainstream invoicing app (FreshBooks, QuickBooks, Wave, Xero, Jobber) can print your GST number on invoices. Turn it on once and it's done.

Construction: T5018

If more than 50% of your business income is from construction activities and you pay subcontractors for construction services, you generally have to report payments to each subcontractor you paid more than $500 in the period on a T5018 slip. Payments for goods only are excluded. Ask your accountant whether your oilfield or renovation work counts as construction.

Keep the records

GST records, like other business records, generally have to be kept six years from the end of the year they relate to. See receipt scanning apps for doing that without boxes of paper.

Sources (checked Nov 2, 2026)

  1. CRA GST/HST Memorandum 2-2: Small suppliers
  2. CRA: Input tax credits (invoice information requirements)
  3. CRA RC4022: General information for GST/HST registrants
  4. CRA: GST/HST calculator and rates
  5. CRA: T5018 slip, statement of contract payments

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