Useful for
- Estimate Canadian sales tax before checkout or invoicing.
- Reverse a tax-included total to understand the pre-tax amount.
- Compare GST, HST, PST, and QST scenarios by province.
GST/HST Calculator
Calculate GST, HST, PST, QST, and total sales tax for Canadian provinces and territories.
Before tax
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Total tax
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Total after tax
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Tax rate
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Tax breakdown
Rates use Canada Revenue Agency GST/HST and PST tables. Estimates may vary by a cent because of rounding and special tax rules.
Tool guide
How to use GST/HST Calculator
GST/HST Calculator gives you a focused way to handle one small task quickly. Calculate Canadian GST, HST, PST, QST, and total after-tax amounts. It is free to use, requires no login, and is built for quick checks when you need a practical result.
Example
For example, use the GST/HST calculator to check a CAD 200 taxable purchase in Alberta, estimate an Ontario HST total, or reverse a tax-included receipt total.
Good to know
Results are meant for quick planning and double-checking. For legal, tax, or financial decisions, review the numbers with a qualified professional.
How it works
The GST/HST calculator adds or reverses Canadian sales tax using the selected province rate. It is useful for checking receipts, quotes, invoices, and advertised prices before or after tax.
Total = subtotal x (1 + tax rate). Reverse subtotal = total / (1 + tax rate).
Practical examples
- A 100.00 subtotal in Ontario at 13% HST becomes 113.00.
- A 56.50 total in Alberta can be reversed to estimate the pre-GST amount.
- A contractor can check whether a quote includes tax before sending it.
Common mistakes
- Use the province where the sale applies, not always where you live.
- Confirm special tax rules for exempt items or mixed-rate invoices.
Questions
Does this replace tax advice?
No. It is a quick calculator for common GST/HST checks, not tax advice.
Can I reverse tax from a total?
Yes, use the reverse mode if the tool page supports it or divide the total by one plus the tax rate.