GST vs. HST vs. PST: What Calgary Business Owners Must Understand in 2026
A Calgary contractor invoiced a Toronto client $5,000 for consulting work. She charged 5% GST. Three months later, the CRA sent a notice: she owed the difference between 5% and Ontario’s 13% HST. The shortfall was $400, plus interest.
This is not rare. The three distinct layers of Canada’s sales tax system are GST, HST, and PST, and the regulations change according to your customer’s location rather than your own. Understanding GST vs HST in Canada is more important for Calgary business owners in 2026 than most guides make clear.
By the end of this article, you will know exactly which tax applies, when to charge it, and how Alberta’s GST-only status gives you a genuine advantage in the GST vs HST Canada landscape when you sell nationally.
What Is GST? The 5% Tax Every Calgary Business Collects
| The majority of goods and services sold in Canada are subject to the 5 percent federal GST (Goods and Services Tax). The Canada Revenue Agency administers it in every province and territory. Businesses with annual taxable revenue above $30,000 must register, collect, and remit it. |
The majority of new business owners in Calgary view taxes as a local matter. But they’re not. Regardless of the province, GST is a federal requirement that follows your company throughout Canada. This guide to GST vs HST Canada will clarify why.
A frequently overlooked detail is that the $30,000 threshold isn’t based on a calendar year. It is calculated over the course of any four consecutive quarters. There is no year-end trigger, but you have to register within 29 days in the middle of the year if you make $8,000 a quarter and surpass $30,000 in Q4.
- Rate: 5% on most taxable goods and services nationwide
- Administered by CRA, one registration, one return covers all provinces
- Registration trigger: $30,000 in taxable revenue over any four consecutive quarters
- Voluntary registration: Available below the threshold; allows you to claim input tax credits immediately
- In Calgary, GST is the only sales tax collected on local transactions
Key Takeaway: Register for GST as soon as your revenue trajectory points toward $30,000, not after you cross it.
Once you understand GST as your baseline, HST becomes far easier to navigate. Here’s what you need to know about the GST vs HST Canada differences.
What Is HST? How Five Provinces Combined Federal and Provincial Tax
| HST (Harmonized Sales Tax) combines the 5% federal GST with a provincial component into one blended tax, collected by the CRA. It applies in Ontario (13%), New Brunswick (15%), Newfoundland and Labrador (15%), Prince Edward Island (15%), and Nova Scotia, which reduced its rate from 15% to 14% effective April 1, 2025. |
Most Calgary business owners know they do not deal with HST locally. What they miss: the moment you invoice a client in Ontario or any other HST province, you must charge their province’s rate.
This is Canada’s place-of-supply rule. Tax follows the buyer’s location, not the seller’s. A Calgary marketing agency invoicing a Toronto client $10,000 must show 13% HST ($1,300) on that invoice, not 5% GST. One GST/HST registration with the CRA covers this obligation. No separate Ontario filing is needed.
| Province | HST Rate (2026) | Notes |
|---|---|---|
| Ontario | 13% | Most common destination for Calgary B2B sellers |
| Nova Scotia | 14% | Reduced from 15% effective April 1, 2025 |
| New Brunswick | 15% | |
| Newfoundland and Labrador | 15% | |
| Prince Edward Island | 15% |
Key Takeaway: Selling to any client in these five provinces means you charge their HST rate. If you invoice Nova Scotia clients, update your templates to reflect 14% as of April 2025.
PST operates on an entirely different structure and is the layer that surprises most Calgary businesses when buying nationally.
What is PST, and why does it cost Calgary Businesses More Than They Expect
| PST (Provincial Sales Tax) is a retail-level provincial tax charged separately from GST in British Columbia (7%), Saskatchewan (6%), Manitoba called RST at 8% and Quebec called QST at 9.975%. Unlike GST and HST, PST is not recoverable as an input tax credit. |
GST and HST are value-added taxes. Pay them on a business purchase, claim them back as an input tax credit. Net cost: zero. PST does not work that way. What you pay, you keep paying.
Buy $5,000 of packaging from a BC supplier? That 7% PST $350 is a permanent business expense with no refund mechanism for most businesses. Since PST is not applicable in Alberta, local businesses in Calgary completely avoid this expense. That is not a technicality; rather, it is a real, quantifiable cash-flow advantage.
- British Columbia: 7% PST administered by the BC Ministry of Finance, separately from the CRA
- Saskatchewan: 6% PST broad registration requirements apply to out-of-province online sellers
- Manitoba (RST): 8% $30,000 threshold for remote sellers, confirmed for 2025-2026
- Quebec (QST): 9.975% administered separately by Revenu Quebec, not the CRA
Key Takeaway: PST is a non-recoverable cost. Factor it into pricing when sourcing from PST provinces or selling physical goods to customers there.
With all three taxes defined, here is the complete 2026 reference table every Calgary business should bookmark.
Canada’s Complete 2026 Sales Tax Rates by Province
Use this table when preparing any cross-provincial invoice. The rates below are current as of 2026, including Nova Scotia’s April 2025 reduction.
| Province / Territory | GST | Provincial Tax | Total Rate (2026) |
|---|---|---|---|
| Alberta ★ | 5% | None | 5% GST only |
| Ontario | 5% | 8% (HST) | 13% HST |
| Nova Scotia | 5% | 9% (HST) | 14% HST reduced Apr 2025 |
| New Brunswick | 5% | 10% (HST) | 15% HST |
| Newfoundland and Labrador | 5% | 10% (HST) | 15% HST |
| Prince Edward Island | 5% | 10% (HST) | 15% HST |
| British Columbia | 5% | 7% PST (separate) | 12% total |
| Saskatchewan | 5% | 6% PST (separate) | 11% total |
| Manitoba | 5% | 8% RST (separate) | 13% total |
| Quebec | 5% | 9.975% QST (separate) | 14.975% total |
| NWT / Nunavut / Yukon | 5% | None | 5% GST only |
★ Alberta also carries a 4% Tourism Levy on hotel and short-term accommodation, the one narrow exception to the province’s no-provincial-tax rule.
The Interprovincial Tax Trap: What Calgary Businesses Must Charge When Selling Nationally
| When a Calgary business sells goods or services to a customer in another province, the applicable tax is determined by the customer’s location, not the seller’s. This is the CRA’s place-of-supply rule, and it is the most commonly misapplied rule for Alberta-based sellers going national. |
More Calgary businesses receive CRA compliance notices for this one rule than for nearly any other GST issue. It seems paradoxical that you are in Alberta, a province that only levies GST. The reason you would be responsible for paying Ontario’s HST is that the tax is applied where the supply is received rather than where it comes from.
The CRA’s own guidance at canada.ca provides a direct example: a Winnipeg retailer selling a laptop to a Halifax customer must charge Nova Scotia’s HST rate, because delivery occurs in Nova Scotia. The same logic applies when any Calgary seller ships or delivers to a customer in another province.
Scenario-by-Scenario Guide for Calgary Sellers
- Calgary seller, Alberta buyer: Charge 5% GST. No further action required.
- Calgary seller, Ontario buyer: Charge 13% HST. One CRA GST/HST registration covers this; no separate Ontario filing is needed.
- Calgary seller, BC buyer: Charge 5% GST on most services. For taxable goods, check whether annual BC sales exceed BC’s PST registration threshold; a separate registration with BC’s Ministry of Finance may apply.
- Calgary seller, Quebec buyer: Charge 5% GST. QST obligations are separate and depend on whether your Quebec revenue crosses Revenu Quebec’s own threshold.
It is costly to make this mistake. In addition to interest, the CRA evaluates shortfalls retroactively from the date of the initial invoice. If your client is registered for GST/HST, they are incapable of claiming input tax credits on an inaccurately invoiced amount, which can lead to disagreements and revised documentation that strains business ties.
Key Takeaway: Before invoicing any non-Alberta client, identify their province and apply that province’s correct tax rate. A Calgary tax advisor can confirm your setup before the invoice goes out, not after.
GST Registration in Alberta: The 29-Day Rule Most New Businesses Miss
| You must register for GST within 29 days of exceeding $30,000 in taxable revenue across any four consecutive calendar quarters. The CRA assesses GST retroactively from the date you were required to register, not the date you actually did. |
The most common mistake: new Calgary entrepreneurs track revenue annually and register in January. But if they crossed $30,000 in October, the CRA’s clock started in October. That is a three-month gap of unregistered, uncollected GST now owed with interest.
You should keep an eye on your rolling four-quarter revenue as well as your year-end total. The obligation starts right away if any four-quarter window in a row exceeds $30,000. Check it once a month.
How to register for GST in 2026:
- Step 1: Log in to My Business Account at canada.ca and select “Register for a GST/HST account.”
- Step 2: Provide your Business Number, legal name, operating name, and fiscal year-end
- Step 3: Confirm expected annual revenue and primary business activity
- Step 4: Receive your GST/HST account number and begin charging GST on taxable sales
Voluntary registration below $30,000 is worth considering. After completing your registration, you’ll have immediate access to claim input tax credits for any qualifying business expenditure. A Calgary freelancer spending $3,000 annually on software and equipment recovers $150 in GST at no meaningful added compliance cost.
Key Takeaway: Monitor your rolling four-quarter revenue monthly. Register within 29 days of crossing $30,000 or voluntarily earlier to access input tax credits from day one.
Input Tax Credits: How to Recover the GST Your Calgary Business Has Already Paid
| Input tax credits (ITCs) allow GST/HST-registered businesses to recover GST or HST paid on eligible business purchases. Every qualifying dollar of GST paid on a business expense is fully claimable, reducing the net amount you remit to the CRA each filing period. |
Most Calgary small business owners focus on what they collect. Fewer focus on what they can claim back. ITCs are one of the most underused tools in Canadian tax compliance.
The contrast is clearest when you compare GST to PST. GST paid on a $1,300 laptop $65 is 100% recoverable on your next GST return. PST paid on the same laptop sourced from a BC supplier,r $91 at 7% is gone permanently. This is why Alberta’s GST-only structure creates a compounding cash-flow advantage for Calgary businesses that source locally.
What qualifies for an ITC:
- Office rent, if your landlord charges GST on the commercial lease
- Equipment, tools, and business software
- Professional services, including accounting, legal, and consulting fees
- Vehicle expenses used for commercial purposes (partial, based on business-use percentage)
- Marketing, advertising, and promotional services
What does not qualify: GST paid on personal expenses, or inputs used exclusively to make exempt supplies such as residential rent or certain health care services.
The CRA requires proper documentation to support every ITC claim. Your supplier’s GST registration number, the exact GST charged, and the invoice date must all appear on the receipt. Missing documentation is the most common reason ITC claims are denied on CRA audit.
Key Takeaway: Claim every eligible ITC and keep invoices that show the supplier’s GST number and the exact tax amount. A missed ITC is money left with the CRA.
Zero-Rated vs. Exempt Supplies: The Distinction That Changes What You Charge
| Zero-rated supplies are taxed at 0% GST, technically applies, but at a nil rate, and the business can still claim input tax credits. Exempt supplies are not subject to GST at all, and the business cannot claim ITCs on related inputs. |
Zero-rated and exempt are not the same. Confusing them produces two costly mistakes: charging GST where none is owed, or failing to claim ITCs where you are entitled to them.
Zero-rated examples include basic groceries, most prescription drugs, and most exports. A Calgary SaaS firm exporting software services to US clients charges 0% GST but still claims ITCs on its development and infrastructure costs. Exempt examples include residential rent, most financial services, health care, and educational tuition. A Calgary landlord does not charge GST on rent and cannot claim ITCs on renovation costs for that rental unit.
| Supply Type | GST Charged? | ITCs Claimable? | Calgary Example |
|---|---|---|---|
| Taxable | Yes (5% or HST rate) | Yes | Calgary IT consultant billing a local firm |
| Zero-Rated | Yes (at 0%) | Yes | Calgary software firm exporting to US clients |
| Exempt | No | No | Calgary landlord collecting residential rent |
Key Takeaway: If you are unsure whether a supply is zero-rated or exempt, use the CRA’s Type of Supply tool at canada.ca. Check before invoicing, not after.
The Bottom Line: Get Your Calgary Business Tax Setup Right Before Your Next Invoice
Canada’s sales tax system has three distinct layers, and every Calgary business owner needs to understand all three, even if Alberta’s GST-only status keeps local compliance simple.
GST is your baseline: 5%, federal, and universal. HST applies the moment you sell to clients in five participating provinces, at their province’s rate, not Alberta’s. PST adds a non-recoverable layer in four others that directly raises your cost of purchasing nationally. And Alberta’s GST-only status is a genuine advantage, one that compounds over time through fully recoverable input tax credits and zero provincial registration complexity.
The piece that generates CRA notices is the interprovincial scenario. Getting the place-of-supply analysis right is not complicated once you know the rule. But it does require a system and ideally, a Calgary tax advisor who reviews your invoicing setup before errors become assessments.
| Not sure whether your Calgary business is charging the right tax on every sale? Book a free 30-minute consultation with intaX Calgary’s small business tax specialists. We confirm your GST setup, review your place-of-supply obligations, and make sure your next filing is clean.→ Book My Free Consultation at intax.ca |
FAQ: Your GST vs. HST vs. PST Questions Answered
Does Alberta have HST?
No. Alberta is the only Canadian province with no HST and no PST. Calgary businesses collect only the 5% federal GST on most goods and services, making Alberta the simplest province in Canada for sales tax compliance.
What is the difference between GST and HST in Canada?
The key distinction in the GST vs HST Canada comparison is structure. GST is the 5% federal tax applied nationally. HST blends GST with a provincial component into one combined rate, used in Ontario, Nova Scotia, New Brunswick, Newfoundland and Labrador, and PEI. HST rates run from 13% to 15% and are collected by the CRA under a single GST/HST registration.
Do I charge GST or HST when selling from Calgary to an Ontario customer?
You charge 13% HST Ontario’s rate because Canada’s place-of-supply rule applies the tax based on the buyer’s location. Your one CRA GST/HST registration covers this. No separate Ontario filing is needed.
When do I have to register for GST in Alberta?
Registration is mandatory when taxable revenue exceeds $30,000 over any four consecutive calendar quarters. You have 29 days from crossing this threshold. Voluntary registration is available for less than $30,000 and lets you claim input tax credits on eligible business purchases right away.
Does Calgary have a provincial sales tax?
No. Calgary is in Alberta, which has no provincial sales tax and does not participate in HST. Calgary businesses collect only 5% federal GST. Alberta’s 4% Tourism Levy applies only to hotel and short-term accommodation providers.
