Free GST/HST Calculator for Canadian Businesses
Quickly calculate GST, HST, PST, or QST for any Canadian province. Enter an amount to add or remove tax instantly. Keep your bookkeeping clean, check invoice calculations, and manage tax remittance without bloated software.
Know your numbers before you send the invoice.
Use Lunio to double-check GST/HST, PST, and QST on billing documents. Avoid embarrassing billing mistakes with clients.
Calculate sales tax in seconds.
Select a province, enter the base or tax-inclusive amount, and toggle between adding or removing tax.
Calculation Results
Outputs update instantly based on inputs.
What are GST, HST, PST & QST?
Canadian sales tax is split between the federal government (GST) and provincial governments (PST or QST). Some provinces have combined these into a single Harmonized Sales Tax (HST).
Keeping track of when to charge 13% HST (Ontario), 15% HST (Atlantic provinces), or GST+QST (Quebec) can get confusing when you sell to clients in different provinces. Lunio simplifies this by calculating the correct tax rate based on the place of supply.
Canadian Tax Rates by Province
Current components and total sales tax rates across Canada:
Frequently Asked Questions
How do I add GST/HST to an invoice?
To add sales tax to an amount, multiply the pre-tax amount by the applicable tax rate percentage, then add that result to the original pre-tax amount. For example, if your service is $100.00 and you operate in Ontario (13% HST):
$100.00 × 0.13 = $13.00 HST. Total invoice is $113.00.
How do I remove tax to find the pre-tax subtotal?
To reverse tax from a total price, divide the total amount by 1 plus the tax rate decimal. For example, if a total is $113.00 in Ontario (13% HST):
$113.00 ÷ 1.13 = $100.00 pre-tax subtotal. The tax portion is $13.00.
For one-click reverse calculations, use our dedicated Reverse Tax Calculator.
What is the CRA sales tax registration threshold?
According to the Canada Revenue Agency (CRA), you are generally required to register for a GST/HST account once your taxable sales, services, or supplies exceed $30,000 in a single calendar quarter or across four consecutive calendar quarters. Under this threshold, you are considered a "small supplier" and registration is voluntary.
Province-specific calculators
Access dedicated tax calculators for other provinces and territories across Canada:
Need more than a simple calculator?
Create estimation documents, send automated invoice reminders, collect credit card payments online, and keep taxes fully organized.