GST/HST Calculator

Add Canadian GST/HST to a price or reverse-calculate the pre-tax amount from a total. Pick any of the 10 provinces or 3 territories for the correct combined rate, from 5% GST-only in Alberta to 15% HST in the Atlantic provinces.

Province / territory

Mode

Price (C$)

Ontario: 13% HST (13% combined)

$100.00

Pre-tax price

$13.00

Tax

$113.00

Total

Some goods and services are zero-rated or exempt from GST/HST, standard rates shown here may not apply to every purchase. Verify with the CRA or your provincial revenue agency. Not tax advice.

GST/HST calculator by province

Every province and territory's combined rate, with a dedicated purchase-amount table for each.

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Why use GST/HST Calculator?

Sales tax in Canada is either a single combined HST rate, a GST-only rate, or GST plus a separate provincial tax, depending on where the sale happens. This calculator covers every province and territory, showing the correct combined rate and its composition (GST only, GST+PST, GST+RST, or HST) so you can see exactly where the number comes from before doing the math. Forward mode answers "what do I pay on a C$249 item in Ontario?" Reverse mode answers "how much of this C$113 total is tax?" Both use the same combined rate for your selected province, round to the nearest cent, and update the moment you change the province, mode, or amount. Each province also has its own dedicated page with a table of common purchase amounts already calculated, useful for a quick lookup without touching the form. Rates are the standard federal/provincial rates; some goods and services are zero-rated or exempt under CRA rules. Confirm with the Canada Revenue Agency or your provincial revenue agency before relying on these figures for compliance.

Key benefits

Every province and territory covered, including HST, GST+PST, and GST-only jurisdictions
Forward and reverse tax math in one tool
Dedicated province pages with a purchase-amount table for quick lookup
Clear breakdown of whether a province uses GST only, GST+PST, or HST
Instant client-side calculation with no page reload

Features

All 10 provinces and 3 territories
Combined rate shown with its GST/PST/HST composition
Add-tax and reverse (extract-tax) modes
CAD formatting throughout
$50 to $2,500 example table on every province page

Popular use cases

Pricing a product or invoice for a specific Canadian province
Back-calculating tax from a receipt or supplier total
Comparing the tax cost of a purchase between provinces, e.g. Alberta vs Ontario
Cross-border shoppers or businesses checking a Canadian tax line

How to use GST/HST Calculator

1
Choose your province or territory
Select from the dropdown, or open a dedicated province page for a table of common purchase amounts already worked out.
2
Pick forward or reverse mode
Forward mode adds tax to a shelf price. Reverse mode splits a tax-included total back into its pre-tax price and tax portion.
3
Enter the amount
Type the dollar amount into the Price or Total field, depending on the mode you picked. Results update instantly.
4
Read the breakdown
Review the combined rate shown for your province (GST only, GST plus PST, or HST), then check the pre-tax price, tax, and total cards.

Frequently asked questions

What is the difference between GST, HST, and PST?

GST (Goods and Services Tax) is a 5% federal tax charged everywhere in Canada. Some provinces combine it with their own provincial tax into a single HST (Harmonized Sales Tax) rate. Others charge GST plus a separate PST (Provincial Sales Tax) or RST (Manitoba's Retail Sales Tax) as two line items that this calculator combines into one rate for you.

Which provinces have no provincial sales tax?

Alberta and the three territories, Yukon, Northwest Territories, and Nunavut, charge only the 5% federal GST with no additional provincial tax.

Why is Quebec's rate 14.975%?

Quebec charges the 5% federal GST plus its own Quebec Sales Tax (QST) at 9.975%, applied on top rather than combined into a flat number, which works out to 14.975% combined.

Are all purchases taxed?

No. Basic groceries, most health and dental services, and certain other categories are zero-rated or exempt from GST/HST nationwide. This calculator applies the standard rate; check CRA guidance for exemptions.

How do I calculate tax backward from a receipt total?

Use reverse mode ("Price before tax") and enter the total. The tool divides by 1 plus the combined rate to find the pre-tax subtotal, then the tax is the difference.

Related guides

How this calculator sources its tax data

Last reviewed: August 2026

GST/HST calculator by province

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