GST/HST vs. PST in Canada: What Service Operators Need to Know

The Interest-Free Government Trap

The single biggest mistake new Canadian trade operators make is treating sales tax like revenue.

You finish a $1,000 pressure washing job, invoice $1,130 with HST, and watch $1,130 land in your bank account. It feels like your money. You buy fuel, pay your helper, upgrade equipment, and carry on.

Then quarterly remittance hits, the CRA demands their $130 back, and suddenly you're scrambling to cover a tax bill with cash you already spent. Sales tax is not revenue—you are simply acting as an unpaid tax collector for the government.

GST, HST, and PST: The Regional Breakdown

Canada doesn't make it simple. What you charge depends entirely on where your customer's boots are on the ground:

• GST (Goods and Services Tax): The 5% federal baseline applied nationwide.

• HST (Harmonized Sales Tax): Combines federal GST and provincial sales tax into a single rate (e.g., 13% in Ontario; 15% in Nova Scotia, New Brunswick, PEI, and Newfoundland).

• PST / RST / QST (Separate Provincial Taxes): Provinces like BC (7% PST), Saskatchewan (6% PST), Manitoba (7% RST), and Quebec (9.975% QST) keep provincial taxes separate from the 5% federal GST.

The "Holy Smokes" Reality: Input Tax Credits (ITCs) Are Free Money

Here is the perspective pivot most trades miss: Collecting GST/HST actually lowers your business overhead if you track your expenses properly.

When you register for GST/HST, you gain access to Input Tax Credits (ITCs). Every dollar of GST/HST you pay on business supplies—fuel, equipment, software, marketing, materials—directly reduces the GST/HST you owe the CRA.

If you collected $1,000 in GST from clients this quarter, but paid $400 in GST on truck repairs and gear, you only send the CRA $600. If you paid more GST on start-up equipment than you collected from customers, the CRA sends you a refund cheque.

The $30,000 Small Supplier Threshold

You do not need to register for GST/HST until you cross $30,000 in gross revenue across four consecutive calendar quarters.

However, staying unregistered once you cross $30k isn't a clever shortcut—it's illegal. If the CRA catches you operating at $40,000 without a GST number, they will audit you and demand 5–15% on all past sales out of your own pocket, even if you never charged your clients a penny of tax.

The LawnJobOS Advantage

Manual tax calculations on custom estimates lead to math errors and angry clients.

LawnJobOS handles localized sales tax automatically at checkout based on your service area. Every line item, deposit, and final invoice reflects exact provincial tax rates, feeding clean financial data directly into your ledger so tax time is an automated report—not a weekend panic.

The Verdict: What Should You Do Today?

• Under $30,000 revenue: Voluntary registration might still make sense if you have high upfront equipment costs so you can claim GST refunds on your purchases.

• Over $30,000 revenue: Register immediately, open a dedicated high-interest savings account, and automatically sweep 10-15% of every customer payment into it the moment it hits your account.

Frequently Asked Questions

Do I charge sales tax based on my business location or the customer's location? In Canada, place-of-supply rules dictate that you charge the sales tax rate applicable to where the service is physically performed or delivered. If your business is based in Alberta (5% GST) but you travel to perform a job in British Columbia (5% GST + 7% PST), BC tax rules apply to that job.

What happens if I forget to register for GST/HST after crossing $30,000? The CRA considers you a registrant the moment you cross $30,000 within four consecutive quarters. You become personally liable for paying the uncollected tax on all sales above that threshold, plus interest and failure-to-register penalties.

Can I claim ITCs on fuel and vehicle expenses? Yes, but only to the percentage the vehicle is used for legitimate business purposes. If your work truck is used 80% for business and 20% for personal errands, you can claim 80% of the GST paid on fuel, repairs, and maintenance as Input Tax Credits.

Do I need a separate PST number in provinces like BC, SK, or MB? Yes. PST is administered provincially, not by the CRA. If you operate in a province with separate provincial sales tax, you must register for a distinct provincial PST number in addition to your federal GST/HST business number.

Disclaimer: This article is for informational and educational purposes only and does not constitute formal legal, accounting, or tax advice. Canadian tax laws vary by province and individual circumstances. Always consult a qualified CPA or tax professional before making structural or tax registration decisions.