The formulas
- Add HST: HST = price × rate. Total = price + HST.
- Remove HST: price = total ÷ (1 + rate). HST = total − price.
To start from a total, use the reverse HST calculator.
The rates, by province and territory
The table comes from the rates Biller uses in its own invoices. We checked them against the CRA's GST/HST calculator page on October 31, 2026.
| Province or territory |
GST or HST |
PST or QST |
Combined |
| Alberta |
5% GST |
None |
5% |
| British Columbia |
5% GST |
7% PST |
12% |
| Manitoba |
5% GST |
7% PST |
12% |
| New Brunswick |
15% HST |
None |
15% |
| Newfoundland & Labrador |
15% HST |
None |
15% |
| Northwest Territories |
5% GST |
None |
5% |
| Nova Scotia |
14% HST |
None |
14% |
| Nunavut |
5% GST |
None |
5% |
| Ontario |
13% HST |
None |
13% |
| Prince Edward Island |
15% HST |
None |
15% |
| Quebec |
5% GST |
9.975% QST |
14.975% |
| Saskatchewan |
5% GST |
6% PST |
11% |
| Yukon |
5% GST |
None |
5% |
PST and QST are separate taxes
British Columbia, Manitoba, Saskatchewan and Quebec charge GST plus their own sales tax. The CRA's table shows those rates, but the provinces run those taxes. The calculator shows each tax on its own line, and you can clear the box if a sale has no PST or QST.
Whether PST or QST applies depends on what you sell. A combined rate is an estimate, not a ruling. Check with the province, or with Revenu Québec for QST. The CRA says, "If provincial sales tax (PST) is charged in the place of supply, calculate the GST on the price without the PST." The calculator works that way.
The rate depends on the place of supply
The CRA says the rate depends on the place of supply, which it describes as the province or territory where a taxable sale, lease or other supply is considered to be made. That is not always where your business is. Some supplies have no tax at all: the CRA says "a zero-rated supply has a 0% GST/HST rate throughout all of Canada."
If you are not registered for GST/HST, you do not charge it. See the GST/HST registration guide for when you must register.
These results are estimates, not tax advice. The CRA also says rounding can move a total by a cent or two. Confirm your own situation with the CRA or a tax professional. Rates checked on October 31, 2026.
Questions
How do I calculate HST in Ontario?
Multiply the price by the rate. In Ontario, the HST rate is 13%, so HST on $100 is $13, and the total is $113.
What is the HST rate in Nova Scotia?
14%. The CRA says the rate fell to 14% on April 1, 2025.
Which provinces charge HST?
Ontario, New Brunswick, Newfoundland and Labrador, Nova Scotia and Prince Edward Island. The table on this page shows each rate.
Is HST the same as GST?
HST combines the federal GST with a provincial part in one rate, and the CRA treats them together as GST/HST. You show one tax line, not two.
Is this calculator exact?
It gives an estimate. It rounds to the cent, and it cannot tell whether your particular sale is taxable or where the place of supply is.