GST/HST calculator — every province, plus reverse calculation
Pick your province and the right taxes apply automatically — GST, HST, QST or PST. Or start from a tax-included total and find the pre-tax amount. Instant, free, no ads.
Amount → taxes
You know the pre-tax amount.
Reverse: total → amount
You know the tax-included total.
Current rates for the selected province; each tax is calculated separately on the pre-tax amount. Rounded to the cent.
Sales tax rates by province (2026)
| Province / territory | Taxes | Combined rate |
|---|---|---|
| Alberta (AB) | GST 5% | 5% |
| Colombie-Britannique (BC) | GST 5% + PST 7% | 12% |
| Île-du-Prince-Édouard (PE) | HST 15% | 15% |
| Manitoba (MB) | GST 5% + RST 7% | 12% |
| Nouveau-Brunswick (NB) | HST 15% | 15% |
| Nouvelle-Écosse (NS) | HST 14% | 14% |
| Nunavut (NU) | GST 5% | 5% |
| Ontario (ON) | HST 13% | 13% |
| Québec (QC) | GST 5% + QST 9.975% | 14.975% |
| Saskatchewan (SK) | GST 5% + PST 6% | 11% |
| Terre-Neuve-et-Labrador (NL) | HST 15% | 15% |
| Territoires du Nord-Ouest (NT) | GST 5% | 5% |
| Yukon (YT) | GST 5% | 5% |
Rates in effect July 2026. Each tax is calculated on the pre-tax amount.
The formulas behind the calculator
- GST = pre-tax amount × 5% (everywhere in Canada)
- HST = pre-tax amount × 13% (ON), 14% (NS) or 15% (NB, NL, PEI)
- QST = pre-tax amount × 9.975% (Québec, on top of GST)
- PST/RST = pre-tax amount × 7% (BC, MB) or 6% (SK), on top of GST
- Reverse = tax-included total ÷ (1 + combined rate)
To build documents that apply these rules automatically, grab the free quote template and the free invoice template.
Frequently asked questions
What is the difference between GST, HST, QST and PST?
GST is the 5% federal tax, applied everywhere in Canada. HST combines federal and provincial tax into one rate (13% in Ontario, 15% in NB, NL and PEI, 14% in Nova Scotia). Québec charges GST plus QST (9.975%), while BC, Saskatchewan and Manitoba charge GST plus their own PST/RST. Alberta and the territories charge GST only.
How do I calculate the pre-tax amount from a total (reverse calculation)?
Divide the tax-included total by 1 plus the combined rate. Example in Ontario: $1,130 ÷ 1.13 = $1,000 before tax. In Québec: divide by 1.14975.
Are QST and PST calculated on top of GST?
No. Since 2013, QST is calculated on the pre-GST amount, just like GST itself. BC, Saskatchewan and Manitoba PST/RST are also calculated on the sale price before GST.
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