Canada Sales Tax Master Guide: GST vs. HST vs. PST vs. QST Explained

1. Overview of Canadian Sales Tax Architecture

Canada’s sales tax system is unique globally because it combines federal consumption taxes with provincial taxes under three distinct frameworks:

• GST (Goods and Services Tax): A 5% federal value-added tax administered by the Canada Revenue Agency (CRA) across all provinces and territories.
• PST / QST (Provincial Sales Tax / Quebec Sales Tax): Separate provincial taxes collected in British Columbia (7%), Saskatchewan (6%), Manitoba (7%), and Quebec (9.975%).
• HST (Harmonized Sales Tax): A single blended tax combining GST and provincial tax into one rate, administered by the CRA in Ontario (13%), New Brunswick (15%), Nova Scotia (15%), PEI (15%), and Newfoundland & Labrador (15%).

For instant Canadian sales tax calculations, use our dedicated Reverse HST Calculator or Reverse GST Calculator.

2. Complete 13 Provinces & Territories Tax Rate Matrix

Here is the complete reference table for all 13 Canadian provinces and territories, including tax types, combined rates, and exact reverse division multipliers:

3. Understanding Harmonized Sales Tax (HST)

In HST provinces (Ontario, Nova Scotia, New Brunswick, PEI, Newfoundland), businesses do not invoice GST and PST separately. Instead, a single combined rate is charged on invoice line items.

To extract the pre-tax price from an HST receipt:

Ontario Example (13% HST): An office computer invoice is $1,469.00 total.

• Pre-Tax Computer Cost = $1,469.00 ÷ 1.13 = $1,300.00
• HST Paid = $1,469.00 - $1,300.00 = $169.00

4. Dual-Tax Provinces (GST + PST / QST Rules)

In Quebec, British Columbia, Saskatchewan, and Manitoba, federal GST and provincial PST/QST are listed separately on receipts.

Since 2013, Quebec QST is calculated additively on the pre-tax price (not compounded on top of GST).

5. Reverse Tax Formulas for Canadian Receipts

When logging receipts into Canadian accounting software like QuickBooks Canada or Wave:

1. Find the gross total paid on the receipt (G).
2. Identify the province where the purchase occurred to determine the division factor (1 + r).
3. Divide G ÷ (1 + r) to isolate the net subtotal (N).
4. Multiply N × 0.05 to isolate the federal GST component claimable as an ITC.

6. CRA Input Tax Credits (ITCs) for Businesses

GST/HST registered businesses in Canada are entitled to claim Input Tax Credits (ITCs) from the Canada Revenue Agency (CRA) to recover all GST/HST paid on commercial business purchases.

Because PST in BC, SK, MB is generally not recoverable as an ITC (unlike GST/HST), Canadian accountants must accurately separate the 5% GST component from provincial PST when auditing non-HST invoices!

7. Interprovincial Sales & Place of Supply Rules

Under CRA Place of Supply rules, the sales tax rate charged on shipped goods or digital services depends on the destination province of the buyer, not the location of the seller.

If an Alberta business (5% GST) ships a product to a customer in Nova Scotia (15% HST), the invoice must charge 15% HST (G ÷ 1.15).

8. Step-by-Step Worked Canadian Receipt Examples

To learn more about standard reverse tax algebra, visit our How to Calculate Reverse Tax Percentage Guide or use our Reverse Sales Tax Calculator.