Ontario HST Calculator
Add or remove HST in seconds. The standard rate in Ontario is 13%, and you can switch to 5% with one click.
Price including HST
$113.00
- Net amount
- $100.00
- HST at 13%
- $13.00
- Gross amount
- $113.00
Ontario HST rates
| Rate | What it applies to |
|---|---|
| 13% | Combined rate: 13% HST (5% federal plus 8% provincial), charged as one tax |
| 5% | GST only. Federal GST, for example when the provincial part does not apply |
How to calculate HST in Ontario
- To add HST: price before tax × 1.13 = price including tax. For example, 100.00 × 1.13 = 113.00.
- To remove HST: price including tax ÷ 1.13 = price before tax. For example, 113.00 ÷ 1.13 = 100.00.
- The tax inside a price that includes it: price including tax × 13 ÷ 113. For 113.00 that is 13.00.
Recent changes and things to know
13% HST (5% federal plus 8% provincial).
Ontario HST: frequently asked questions
What is the HST rate in Ontario?
The standard HST rate in Ontario is 13%. Other rates: 5% (federal GST, for example when the provincial part does not apply).
How do I add HST to a price?
Multiply the price before tax by 1.13. For example, 100 plus 13% HST is 113.00.
How do I remove HST from a price?
Divide the price including HST by 1.13. For example, 113.00 including 13% HST is 100.00 before tax. Do not just take 13% off the total, because that gives the wrong answer.
Is this HST calculator free?
Yes. It is free, needs no sign-up and runs in your browser, so nothing you type is sent to BunnyDoc.
Sources
Rates checked in October 2026. Tax rates and rules change, and what you charge depends on what you sell and to whom, so check the official sources above or ask an accountant. This page is general information, not tax advice.
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