GST/HST calculator

Remove GST/HST From a Total

When a receipt or invoice already includes tax, reverse calculation finds the before-tax price. Choose the province in the full calculator to remove GST, HST, PST, or QST correctly.

Remove sales tax View methodology

Common examples

5% GST

total / 1.05

Used in Alberta and the territories.

13% HST

total / 1.13

Used in Ontario.

15% HST

total / 1.15

Used in NB, NL, and PEI.

How to use this page

Use the examples above to confirm the calculation type you need.
Open the full calculator with the button above.
Change the amount, province, rate, or pay period to match your real scenario.
Use the source link below to verify the public rule behind the estimate.

Questions

Do I subtract the tax rate from the total?

No. Divide by 1 plus the tax rate. Subtracting 13% from a tax-included total gives the wrong pre-tax price.

Does this work for Quebec?

Yes. Use the Quebec option in the GST/HST calculator so QST is handled with the correct combined rate.

Source

This page links into the shared usecos calculator engine and cites CRA GST/HST rates by province.