GST/HST Calculator (Canada)
Add or reverse GST, HST, PST and QST for any province or territory. Free, instant, and always up to date — built for Canadian small businesses.
Amount is before tax — add tax on top.
Total (with tax)
$113.00
- Amount before tax
- $100.00
- HST (13%)
- $13.00
Rates are provided for general guidance and reviewed regularly, but can change — always confirm current rates with the CRA before filing. Not tax advice.
How to figure out HST in Ontario
Ontario’s HST is 13% — a 5% federal GST plus an 8% provincial portion, combined into one Harmonized Sales Tax. Here is the GST/HST math the calculator above runs for you.
Adding HST
Multiply the pre-tax amount by 13% and add it on. On $100: $100 × 0.13 = $13 HST, for a $113 total.
Figuring HST out of a total
To back the tax out of a tax-included price, divide the total by 1.13. On $113: $113 ÷ 1.13 = $100 before tax, so the HST was $13.
Every province works the same way — switch the province above to figure out GST, HST, PST or QST anywhere in Canada.
GST/HST rates by province (2026)
| Province / Territory | Type | Total rate |
|---|---|---|
| Ontario | HST | 13% |
| British Columbia | GST + PST | 12% |
| Alberta | GST | 5% |
| Quebec | GST + QST | 14.975% |
| Manitoba | GST + PST | 12% |
| Saskatchewan | GST + PST | 11% |
| Nova Scotia | HST | 14% |
| New Brunswick | HST | 15% |
| Newfoundland and Labrador | HST | 15% |
| Prince Edward Island | HST | 15% |
| Northwest Territories | GST | 5% |
| Yukon | GST | 5% |
| Nunavut | GST | 5% |
Made more than $30,000? You likely need to register.
Once your business earns more than $30,000 in gross revenue over four consecutive calendar quarters, you’re no longer a “small supplier” and must register for a GST/HST number and start collecting tax. We handle business registration and your CRA GST/HST account setup for Ontario businesses — so you get it right the first time.
Register a business in Ontario →GST/HST — common questions
- How much is HST in Ontario?
- HST in Ontario is 13% — a 5% federal (GST) portion plus an 8% provincial portion, combined into a single Harmonized Sales Tax.
- How do I calculate reverse HST from a total?
- To back HST out of a tax-inclusive total, divide the total by 1 plus the rate. In Ontario, base = total ÷ 1.13, and the HST is the difference. Switch this tool to “Remove tax” and it does it for you.
- How do I figure out GST and HST in Ontario?
- To figure out HST in Ontario, apply the 13% rate. Adding tax: multiply the pre-tax amount by 1.13 (or ×0.13 for the tax on its own). Figuring HST out of a tax-included total: divide by 1.13. This calculator handles both — set it to “Add tax” or “Remove tax”, choose Ontario, and it figures out the GST and HST for you.
- What’s the difference between GST, HST and PST?
- GST is the 5% federal tax that applies across Canada. HST provinces (like Ontario) combine the federal and provincial portions into one rate. Other provinces charge GST plus a separate provincial sales tax (PST), or QST in Quebec.
- Do I have to charge GST/HST on my sales?
- Once your business makes more than $30,000 in gross revenue over four consecutive calendar quarters, you must register for a GST/HST number and charge tax. Below that threshold you’re a “small supplier” and registration is optional.
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