Ontario HST Calculator
Add or remove 13% HST at Ontario's standard rate, with the net, HST and gross in CAD instantly.
This free Ontario HST calculator adds or removes HST at Ontario's standard rate of 13%. Enter an amount in CAD, choose Add or Remove, and it shows the net amount, the HST and the gross total instantly. No sign-up, and nothing leaves your browser.
Adding 13% HST (Canada — Ontario (HST)) to your net amount.
How to add 13% HST
Multiply the net amount by 0.13 to get the HST, then add it on. For example, 1,000.00 CAD net + 130.00 CAD HST = 1,130.00 CAD gross.
How to remove HST from a price
Divide the HST-inclusive amount by 1.13. For example, 1,000.00 CAD including HST ÷ 1.13 = 884.96 CAD net, so the HST is 115.04 CAD. Subtracting 13% of the gross instead would give 870.00 CAD, which understates the net amount. It's the most common HST mistake.
13% HST on common amounts
| Net (CAD) | HST (13%) | Gross |
|---|---|---|
| 100.00 CAD | 13.00 CAD | 113.00 CAD |
| 500.00 CAD | 65.00 CAD | 565.00 CAD |
| 1,000.00 CAD | 130.00 CAD | 1,130.00 CAD |
| 5,000.00 CAD | 650.00 CAD | 5,650.00 CAD |
| 10,000.00 CAD | 1,300.00 CAD | 11,300.00 CAD |
About HST in Ontario
HST (harmonized sales tax) combines the federal GST and a provincial sales tax into a single rate in the Canadian provinces that use it. It is added and removed exactly like any other VAT-style tax.
The standard rate in Ontario is 13%, charged in CAD. Reduced or zero rates may apply to some goods and services. Use the calculator's custom rate for those, and confirm current rates with the tax authority before you file.
Frequently asked questions
What is the HST rate in Ontario?
The standard HST rate in Ontario is 13%. Some goods and services may be taxed at a reduced or zero rate, so check the rate that applies to what you sell.
How do I add 13% HST to a price?
Multiply the net price by 0.13 to get the HST, then add it on. For example, 1,000.00 CAD net plus 130.00 CAD HST is 1,130.00 CAD gross.
How do I remove HST from a price in Ontario?
Divide the HST-inclusive price by 1.13. For example, 1,000.00 CAD including HST is 884.96 CAD net and 115.04 CAD HST. Don't just subtract 13% of the gross; that gives 870.00 CAD, which is wrong.
Is this Ontario HST calculator free?
Yes. It's completely free, needs no sign-up, and runs entirely in your browser.
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