GST/HST filing in Calgary

One tax, and where the risk goes instead

Alberta is the outlier. There is no provincial sales tax, which the CRA's own rate table records as a provincial rate of nil. A business selling only within Alberta charges 5% GST and nothing else — one registration, one return, one administrator, and no non-recoverable provincial tax buried in its input costs. Alberta does levy a separate tourism levy on accommodation, but that is a specific charge rather than a general sales tax.

What that simplicity does is concentrate the exposure. In a province with two systems, a review can go wrong in several directions. In Alberta there is effectively one question, and it is on the purchase side: can you support the input tax credits you claimed? Because Alberta registrants claim credits on everything and have no provincial layer to complicate the picture, the credit side is where the whole of a GST review lands. The position is tabled with its source on the Alberta tax facts page.

What an input tax credit actually requires

A claim is not supported by the fact that money left the bank. The documentation has to identify the supplier and, at the applicable thresholds, carry the supplier's GST registration number; it has to show the amount of tax or enough information to calculate it; and it has to identify the supply well enough that someone else can tell what was bought. A credit card statement showing a merchant name and a total meets none of those tests, and it is far and away the most common category of claim disallowed on review.

Three further points recur in Calgary files. Where a supplier is not registered, there is no GST to claim regardless of what the invoice says — and registration numbers can be verified. Where an expense is used partly for personal purposes, only the business proportion is claimable, and the apportionment should be recorded when the claim is made rather than reconstructed under pressure. And credits do not have to be claimed in the period the tax was paid: there is a window, so a missed credit found in time is often still recoverable. Our note on what the CRA checks covers the ground in more detail.

The complication arrives at the border

The one place Alberta's simplicity ends is when you sell outward. The rate follows the place of supply rather than your address, so a Calgary business selling into an HST province charges that province's rate, not 5%. Sell into a province with its own separate provincial sales tax and a second question arises about whether you have obligations there too. A business that grows out of Alberta into national sales and keeps invoicing at 5% accumulates an under-collection that runs across every affected invoice until someone notices — and the seller, not the customer, owes the difference. The GST/HST hub annotates the guides that cover this.

What is covered

• GST registration, or review of your existing reporting period
• Returns prepared and filed on your assigned schedule
• Input tax credits claimed against documentation that supports them
• Supplier registration status confirmed where a claim depends on it
• Business and personal apportionment recorded at the time of claim
• Rates checked against place of supply for any sales made outside Alberta
• Returns reconciled to the ledger, and CRA correspondence handled

Remote, from British Columbia

EverStone is a sole practitioner CPA firm with a single office in Abbotsford, British Columbia. There is no Calgary office and no Alberta location. Calgary businesses are served entirely online — records arrive through secure exchange, returns are reviewed on a video call, and filings are approved by e-signature — in effectively the same working day, given the hour between us. One accountant holds the file, which is what keeps the documentation standard consistent from one period to the next rather than tightening only after a question is asked.