Ontario reverse tax calculator: Reverse HST calculator

Need to know the original price before taxes in Ontario? Our reverse HST calculator is specifically designed for this type of calculation. This calculator is ideal for personal or business use in Ontario and helps you find the exact price before taxes from an amount including HST.

Ontario Reverse HST Calculator

Calculate the tax amount included in a total price

This calculator determines how much tax (HST) is already included in a given total amount. Enter the final price with taxes to see the breakdown.

Amount Breakdown

Amount before tax $0.00
Total HST (13%) $0.00
Federal Portion (5%) $0.00
Provincial Portion (8%) $0.00

Verification

Base Amount + HST $0.00
Ontario HST Calculator ⟲

The current HST rate in Ontario, Canada, is 13%, consisting of a provincial portion (8%) and a federal portion (5%). Our advanced reverse HST calculator extracts these taxes from any amount and displays them to the user.

How to use the Ontario reverse HST calculator?

  • To calculate the amount before HST, simply enter the amount including HST in the input field.
  • The calculator will automatically reverse calculate the HST and display all taxes applied as well as the price before taxes in Ontario.
  • The reverse calculator will display the total HST amount, the federal and provincial portions, as well as the total amount excluding taxes. This all-tax converter is advanced and up-to-date according to Ontario tax regulations.

What is HST and how do I manually calculate reverse tax?

HST stands for Harmonized Sales Tax, which is a combination of the federal GST (5%) and a provincial sales tax (PST) into a single unified tax. The current HST rate in Ontario is 13%, consisting of the federal portion (5%) and the provincial portion (8%).

Reverse HST calculations allow you to find the pre-tax selling price from an amount that already includes HST. This is done using a formula or an automated calculator that extracts the HST and the pre-tax amount from the total including tax.

The general formula for the reverse calculation of HST is:

Initial amount = Amount including HST ÷ (1 + HST rate)

For example, we have a receipt showing a total of $113 (HST included) and we want to manually calculate the original price before HST.

We get:
Amount including HST = $113.00
HST rate = 13% = 0.13

Using the above formula, we have:

Initial Amount = $113.00 ÷ (1 + 0.13)

Initial Amount = $ 100.00

To find the HST amount:

HST Amount = HST Included Amount – Initial Amount

HST Amount = $ 113.00 – $ 100.00 = $ 13.00