GST calculator
Add or remove the 5% federal GST, in the provinces and territories that charge it alone.
Calculation mode
- Subtotal
- $100.00
- GST 5%
- $5.00
- Total
Get it on your phone
The same calculator, offline, with every province built in.
How it’s calculated
Adding tax to $100.00
Total = price × (1 + combined rate)
- Subtotal
- $100.00
- GST 5%
- $5.00
- Total
- $105.00
Removing tax from $100.00
Price = total ÷ (1 + combined rate)
- Subtotal
- $95.24
- GST 5%
- $4.76
- Total
- $100.00
Examples use Alberta at 5%. Change the province above to see another.
The federal tax, everywhere
GST is the federal goods and services tax, and it applies across Canada at a single rate. What changes from province to province is what gets added on top.
In Alberta and the three territories, GST is the whole story. In BC, Saskatchewan, Manitoba and Quebec, a separate provincial tax is charged alongside it. In the HST provinces, the provincial portion is harmonized into the federal tax, so you charge one combined rate rather than the 5% GST separately.
That last point is the common confusion: in an HST province you don’t charge GST and HST. The HST already contains the federal portion.
It’s a value-added tax
If you’re registered, GST generally flows through your business. You collect it on sales, claim input tax credits on the GST you paid on business purchases, and remit the difference. That’s what distinguishes it from provincial retail sales taxes like BC’s PST or Manitoba’s RST, which are usually unrecoverable costs.
Zero-rated and exempt
Not everything carries GST. Basic groceries are zero-rated across the country, meaning they are taxable at 0%. Exempt supplies are different: no tax is charged, and the supplier generally cannot claim input tax credits on purchases made to provide them. For the customer the two look identical — no tax either way — but for a registered business the distinction decides whether the GST you paid is recoverable.
Pick a province above to see what applies where.
Common questions
What is the GST rate in Canada?
5%, and it applies across the whole country. Some provinces add a provincial tax on top, and others fold the provincial portion into a single HST rate instead.
Where is GST the only sales tax?
Alberta, Yukon, the Northwest Territories and Nunavut. Everywhere else adds a provincial tax or uses HST.
How do I calculate GST?
Multiply the price before tax by 0.05. To find the GST inside a total, divide the total by 1.05.
When do I have to register for GST?
Generally once your taxable revenue passes $30,000 over four consecutive calendar quarters. Registering voluntarily below that lets you claim input tax credits.
What are input tax credits?
If you're registered, you can generally recover the GST you paid on business purchases by claiming it against the GST you collected, so the tax flows through your business rather than landing on it.