How Canadian GST and HST Are Calculated

Learn how Canada's federal GST, combined HST, and provincial PST work by province. Includes complete tax rate table for all provinces and worked examples.

Reviewed & verified by Ismail Nemat

Introduction

Most sales taxes in Canada are collected under a Goods and Services Tax (GST) and Harmonized Sales Tax (HST) system. Some Provinces may also have Provincial Sales Tax (PST) or Quebec Sales Tax (QST). A Canada GST/HST Calculator aids businesses and consumers in determining sales tax in a speedy, accurate manner. It can be applied to the base price to calculate the tax, the final price to calculate the base price, and the total tax to be paid in a transaction.

GST and HST in Canada

Goods and Services Tax (GST)

GST is a federal sales tax that is applied nationwide. The default rate for the GST is 5% and is collected by the Canada Revenue Agency (CRA).

Harmonized Sales Tax (HST)

HST is a single tax rate that includes the 5% federal GST and the provincial sales tax. HST is required in some provinces and makes tax collection easier for businesses doing business in those provinces. The Provincial Sales Tax (PST) and Quebec Sales Tax (QST) are both taxable. Some provinces have their own sales tax on top of the GST: PST is applicable in provinces like British Columbia, Saskatchewan, Manitoba, etc.

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Quebec: QST

These taxes are usually calculated independently of the federal GST, which is not in use in these provinces. As of July 2026, these are the commonly used GST/HST rates in Canada. To determine the applicable rate, businesses should check with the province or territory the supply is being made in.

How to Add GST/HST to a Price

If you have a tax-exclusive price and you need to calculate the final price (with GST or HST), then you use the following formulas. The formula for calculating the amount of tax is:

Tax Amount = Base Price × Tax Rate

The total cost of the product = price of the product + the amount of tax.

How to strip the GST/HST from an amount

If you know the price inclusive of tax and wish to calculate the price exclusive of tax, or the tax amount, then use the following formulas:

Price excluding tax = Price with tax ÷ (1 + Tax Rate)

The Tax Amount is the difference between the Tax-inclusive Price and the Tax-exclusive Price.

Current GST/HST Rates in Canada

ManitobaGST + PST5% + 7%
OntarioHST13%
QuebecGST + QST5% + 9.975%
Nova ScotiaHST15%
New BrunswickHST15%
Prince Edward IslandHST15%
Newfoundland and LabradorHST15%

Hand holding a small calculator with the Canadian flag and CAD on its display against a stock market screen

Why is it important to use a Canada GST/HST Calculator?

Quick calculations: Calculate GST, HST, PST or QST quickly.

Correct pricing: Add the appropriate tax to purchases.

Business compliance: Provide businesses with support in correctly collecting and reporting sales tax.

Budgeting: Aid consumers in making estimates of the total cost of purchases.

Error reduction: Manual tax calculation without mistakes.

Province-Specific Tax Considerations

In Canada, sales tax is levied on supplies made in a province or territory.

HST provinces

● Ontario: 13% HST

● Nova Scotia: 15% HST

● New Brunswick: 15% HST

● Prince Edward Island: 15% HST

● Newfoundland and Labrador: 15% HST

Utilization of GST/HST calculators by businesses

Customer Invoices:

Determine the proper amount of GST/HST to charge for customer invoices.

Pricing decisions:

Set pricing after taxes have been applied.

Tax compliance:

Make sure both GST/HST are collected and reported properly.

Input tax credit verification:

Verify input tax credit from eligible business purchases.

Financial planning:

Determine the amount of sales tax to be paid on business transactions.

Calculator resting on a spread of Canadian dollar banknotes including five and ten dollar bills

GST/HST Calculation Errors

● Applying the wrong provincial tax rate to the place of supply.

● Mixing up HST and separate GST and PST/QST systems.

● Taxing zero-rated supplies which can be taxable at 0%.

● Not removing a tax from a price that includes the tax by simply taking the percentage away.

● Not updating rates on the change of provincial tax rules.

A Canada GST/HST Calculator can help minimize these inaccuracies.

The calculator is beneficial for a variety of reasons.

● Businesses: Generate accurate invoices, keep proper tax records.

● Consumers: Be aware of the entire cost of purchases before payment.

● Accountants: Check GST/HST calculations and ensure proper reporting.

● Online Vendors: Work out sales tax for customers from different provinces.

Frequently Asked Questions

What is the rate of the Goods and Services Tax (GST) in Canada?

The federal rate for the Goods and Services Tax (GST) in Canada is 5%.

What is HST?

HST is a provincial and federal sales tax that is levied together in participating provinces, including Nova Scotia and Ontario.

How to compute GST/HST on a purchase?

Calculate the amount of tax by multiplying the base price times the tax rate. Subsequently, add the tax value to the base value to get the final value.

How can I get rid of GST/HST from the final price?

Subtract the tax rate from the total price to get the tax-free price. Now calculate the amount of tax by subtracting the tax-exclusive price from the tax-inclusive price.

Why are there different tax rates in Canada?

The reason for variation in tax rates is that some provinces apply HST, while others apply GST plus PST or GST plus QST.

Conclusion

The Goods and Services Tax/Harmonized Goods and Services Tax (GST/HST) is one of the significant components of pricing and tax reporting for the majority of goods and services in Canada. A Canada GST/HST Calculator simplifies the calculation of amounts of tax, total costs, and tax-exclusive costs for the goods and services purchased in various provinces and territories. As a business owner, online seller, accountant, or consumer, it is essential to understand how to calculate GST and HST for accurate pricing, proper invoicing, and adherence to Canadian tax laws. With the help of the formulas and examples included in this guide, you can be sure to calculate amounts for GST, HST, PST, and QST for many different transactions.
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Worked Examples

Example 1: A taxable purchase in Ontario where the 13% HST applies.

Inputs: Pre-tax price C$100.00; combined HST rate 13%.

Calculation and result: HST = C$100.00 × 0.13 = C$13.00. The customer pays C$113.00 before any other fees.

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