GST/HST Calculator
Instantly calculate GST, HST, and PST for any province or territory in Canada.
GST/HST Calculator
Ready to Calculate
Select a province and enter an amount to see the detailed tax breakdown.
Learn · Canadian Sales Tax System
GST/HST Calculator
In Canada, navigating sales tax can be frustratingly complex because rates, rules, and exemptions vary significantly depending on where you are located. Our Canadian GST/HST Calculator simplifies this by allowing you to instantly add or remove the applicable sales taxes—GST, PST, RST, or HST—for any given amount across all provinces and territories.
Whether you are a consumer trying to determine the final checkout price of an item, a freelancer calculating how much tax to charge on an invoice, or a small business owner figuring out how much tax to remit to the Canada Revenue Agency (CRA), our tool provides a 100% accurate, instant breakdown of the base amount versus the tax portion.
The calculations are driven by the most recent official tax rates published by the CRA and provincial ministries of finance for 2026. This means our calculator automatically differentiates between the distinct tax frameworks applied in Alberta versus Quebec, or Ontario versus British Columbia.
Understanding GST, PST, RST, and HST
The abbreviation GST stands for Goods and Services Tax. It is a flat 5% federal tax applied to most goods and services across all of Canada. In provinces like Alberta, Nunavut, Northwest Territories, and Yukon, the 5% GST is the only mandatory sales tax you will pay.
The abbreviation PST stands for Provincial Sales Tax (sometimes called Retail Sales Tax or RST depending on the region). Provinces such as British Columbia, Saskatchewan, Manitoba, and Quebec (where it is known as the QST or Quebec Sales Tax) levy their own independent sales tax on top of the federal GST. In these provinces, consumers and businesses must track and remit two separate taxes.
The abbreviation HST stands for Harmonized Sales Tax. To simplify tax collection and compliance, participating provinces merged the federal GST with their provincial taxes to create a single, combined tax known as the HST. If you reside or do business in Ontario, New Brunswick, Nova Scotia, Newfoundland and Labrador, or Prince Edward Island, you only deal with one combined tax rate—the HST (typically 13% or 15%).
The $30,000 Rule and Tax Exemptions
A critical piece of tax knowledge for Canadian freelancers and small business owners is the "Small Supplier" threshold. According to the CRA, if your total worldwide taxable revenues from all your businesses are $30,000 or less over four consecutive calendar quarters, you are generally not required to register for or collect GST/HST. However, the moment your revenue crosses $30,000 in a single calendar quarter (or over four consecutive quarters), you must register within 29 days.
It is also crucial to note that not all items and services are subject to sales tax in Canada. The CRA categorizes certain goods into two special categories: "Zero-rated" and "Exempt."
Zero-rated supplies are taxed at 0%. This category includes basic, essential goods such as basic groceries (milk, bread, vegetables), prescription drugs, and certain medical devices. Businesses selling zero-rated goods can still claim input tax credits (ITCs). Exempt supplies mean no GST/HST is charged at all, and businesses providing them cannot claim ITCs. Examples include long-term residential rent, many educational services, and medical/dental services. Always consult official CRA bulletins for the specific tax status of the goods or services you sell.
How to Calculate and Extract GST/HST (The Formulas)
Our advanced calculator allows you to perform two main types of mathematical operations: Adding Tax to a base price and Removing Tax (reverse calculating) from a final, tax-inclusive price.
Formula to Add Tax: To calculate the final price of an item where the tax is not yet included, simply multiply your base amount by the appropriate tax rate expressed as a decimal. For example, to add 13% HST to a $100 item in Ontario, you multiply $100 by 0.13 to determine that the tax is $13. The total price is $113.
Formula to Extract Tax (Reverse Calculation): This is the calculation most small business owners struggle with. If you know the final price is $113 and you want to extract the 13% tax to find the base amount, you divide the total amount by 1 plus the tax rate (1.13). The formula is: Total Amount / 1.13 = Base Amount. Or, to find just the tax amount: Total Amount - (Total Amount / 1.13). Our calculator runs this reverse math instantly when you select "Remove Tax."