Ontario HST calculator

Use this Ontario HST calculator to calculate the 13% Harmonized Sales Tax or perform a reverse HST calculation.

Enter an amount in any one of these fields:

• Price before HST—to calculate the HST and total price.
• HST amount—to calculate the prices before and after HST.
• Price including HST—to calculate the included HST and price before tax.

The remaining fields update automatically.

Harmonized Sales Tax (HST) in Ontario

What is the current 2026 HST rate in Ontario?

Ontario’s HST rate is 13%. It consists of the 5% federal portion and the 8% provincial portion.

Ontario HST calculation example

For a price of $100 before tax:

• Federal portion: $100 × 5% = $5
• Provincial portion: $100 × 8% = $8
• Total HST: $13
• Price including HST: $113

For a reverse calculation, divide the tax-inclusive price by 1.13. For example, $113 ÷ 1.13 = $100 before HST.

Data source: Canada Revenue Agency

History of sales taxes in Ontario

Ontario introduced the Harmonized Sales Tax on July 1, 2010. The 13% HST replaced the previous combination of the 5% federal GST and 8% Ontario Retail Sales Tax.

The HST combines federal and provincial sales tax into a single tax. Its current 13% rate consists of a 5% federal portion and an 8% provincial portion.

HST exemptions, zero-rated items and Ontario rebates

Not every item that receives HST relief is technically exempt. Some supplies are exempt from HST, while zero-rated supplies—such as many basic groceries and qualifying feminine hygiene products—are taxed at 0%. Ontario also provides a point-of-sale rebate of the 8% provincial portion of HST on qualifying books, children’s clothing and footwear, children’s diapers, car seats, newspapers, and certain prepared food and beverages. See the Ontario HST point-of-sale rebate guide for current details.

Do I need to register for and collect HST in Ontario?

You generally do not need to register for or collect GST/HST if you provide only exempt supplies or qualify as a small supplier.

For a complete explanation of the threshold, registration dates, exceptions, and voluntary registration, read our GST/HST registration guide.

For most businesses, you are no longer a small supplier if your taxable revenues exceed $30,000 in a single calendar quarter or over four consecutive calendar quarters. Special rules and exceptions apply, so consult the CRA’s GST/HST registration guidance.

How do I get an HST number?

Register for a GST/HST account through the Canada Revenue Agency’s Business Registration Online service. If you do not already have one, the registration process will also provide your business number.

If you cannot register online, the CRA provides alternative instructions, including Form RC1 for eligible businesses. See the CRA’s GST/HST registration page for current requirements and registration options.

How long should I keep GST/HST records?

You generally must keep your GST/HST records and supporting documents for six years from the end of the year to which they relate. Some records may need to be kept longer, and you need written permission from the CRA before destroying required records early.

See the CRA’s guidance on keeping records for complete requirements.

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Need to calculate HST for another province? Use the Canada HST calculator or select another provincial calculator from the menu.

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Comments are welcome for calculator feedback, bug reports, and feature suggestions. We cannot answer questions about individual tax situations or provide business, accounting, or legal advice.