Canada Reverse HST Calculator —
Add or Remove Tax Instantly
Add HST to a pre-tax price or remove HST, GST, PST, QST or RST from a tax-included total. Choose your Canadian province or territory and see the tax breakdown instantly.
Canadian Sales Tax Rates
Current general rates at a glance
| Province | Type | Total Rate |
|---|---|---|
| Alberta (AB) | GST | 5% |
| British Columbia (BC) | GST PST | 12% |
| Manitoba (MB) | GST RST | 12% |
| New Brunswick (NB) | HST | 15% |
| Newfoundland & Lab. (NL) | HST | 15% |
| Northwest Territories (NT) | GST | 5% |
| Nova Scotia (NS) | HST | 14% |
| Nunavut (NU) | GST | 5% |
| Ontario (ON) ★ | HST | 13% |
| Prince Edward Island (PE) | HST | 15% |
| Quebec (QC) | GST QST | 14.975% |
| Saskatchewan (SK) | GST PST | 11% |
| Yukon (YT) | GST | 5% |
GST and HST rates are checked against the Canada Revenue Agency (CRA). Provincial PST, QST and RST components are displayed separately where applicable.
Canada Revenue Agency →Current general HST rates include Ontario 13%, Nova Scotia 14%, and 15% in New Brunswick, Newfoundland and Labrador, and Prince Edward Island.
✓ Verified September 2026Results are estimates. Rounding, exempt or zero-rated supplies, place-of-supply rules and special tax rules can affect the tax applicable to a particular transaction.
CRA →How this calculator computes tax
Add Tax: Total = Base Price × (1 + rate)
Remove Tax: Base = Total Price ÷ (1 + rate)
Tax Amount = Total − Base Price
Methodology: HST provinces use the applicable combined HST rate. For provinces with separate GST and PST/QST/RST, the applicable components are calculated against the pre-tax base. The CRA notes that calculator results can vary slightly because of rounding.
What Is HST in Canada?
The Harmonized Sales Tax (HST) is a Canadian consumption tax that combines the federal Goods and Services Tax (GST) with a provincial component into a single tax in participating provinces.
Provinces that do not use HST apply the federal 5% GST and may also charge a separate provincial tax such as PST, QST or RST. This calculator lets you add those taxes to a pre-tax amount or reverse the calculation from a tax-included total.
Which provinces have HST?
Five provinces use HST: Ontario at 13%, Nova Scotia at 14%, New Brunswick at 15%, Newfoundland and Labrador at 15%, and Prince Edward Island at 15%.
Canadian Sales Tax Rates by Province and Territory
Canada has ten provinces and three territories, with different combinations of HST, GST and provincial sales taxes. The table below shows the general rates used by this calculator.
| Province / Territory | GST | PST / QST / RST | Total |
|---|---|---|---|
| Ontario (ON) | — | HST | 13% |
| Nova Scotia (NS) | — | HST | 14% |
| New Brunswick (NB) | — | HST | 15% |
| Newfoundland & Labrador (NL) | — | HST | 15% |
| Prince Edward Island (PE) | — | HST | 15% |
| British Columbia (BC) | 5% | 7% PST | 12% |
| Alberta (AB) | 5% | None | 5% |
| Quebec (QC) | 5% | 9.975% QST | 14.975% |
| Manitoba (MB) | 5% | 7% RST | 12% |
| Saskatchewan (SK) | 5% | 6% PST | 11% |
| Northwest Territories (NT) | 5% | None | 5% |
| Nunavut (NU) | 5% | None | 5% |
| Yukon (YT) | 5% | None | 5% |
How to Calculate HST in Ontario
Ontario has a general HST rate of 13%. To add Ontario HST to a pre-tax price, multiply the base price by 13% to calculate the tax and by 1.13 to calculate the final price.
HST Amount = Base Price × 0.13
Total Price = Base Price × 1.13
Example: $100.00 × 1.13 = $113.00 including Ontario HST.
Step-by-step example
- A service costs $850.00 before tax in Ontario.
- HST = $850.00 × 0.13 = $110.50.
- Total price = $850.00 + $110.50 = $960.50.
How to Calculate Reverse HST — Remove HST From a Total
A reverse HST calculation finds the original pre-tax price and the HST already included in a final price. You may also see this described as removing HST, backing out HST or extracting HST from a total.
If a price already includes Ontario's 13% HST, do not simply subtract 13% from the total. The tax-included total represents 113% of the original base price.
Base Price = Total Price ÷ 1.13
HST Amount = Total Price − Base Price
Example: $226.00 ÷ 1.13 = $200.00 before tax,
with $26.00 HST included.
How to calculate HST included in a total
For an Ontario price that already includes HST, the HST portion can also be calculated using the 13/113 formula.
HST Included = Total Price × 13 ÷ 113
Example: $113 × 13 ÷ 113 = $13 HST.
Reverse tax in British Columbia
For a straightforward British Columbia transaction using the general 5% GST and 7% PST rates, the combined rate is 12%.
Base Price = Total Price ÷ 1.12
GST = Base Price × 0.05
PST = Base Price × 0.07
When do you need a reverse HST calculation?
- Receipt review — identify how much sales tax is included in a final price.
- Bookkeeping — separate the pre-tax amount from the tax component.
- Invoice reconciliation — compare a final invoice against the expected general tax rate.
- Personal purchases — see how much of a tax-included price represents sales tax.
Ontario HST Calculation Examples
The examples below use Ontario's general 13% HST rate.
| Pre-tax Price | 13% HST | Total |
|---|---|---|
| $100.00 | $13.00 | $113.00 |
| $500.00 | $65.00 | $565.00 |
| $1,000.00 | $130.00 | $1,130.00 |
| $5,000.00 | $650.00 | $5,650.00 |