GST/HST calculator
Pick a province, enter an amount, and see the tax broken out line by line — whether you are adding tax to a price or pulling it back out of a total.
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Working with a different rate? Edit the rates this calculator uses
These are the figures we verified on 2026-08-01. Change them to work with a historic period, or with a new rate that has been announced but which we have not published yet.
Resets to the selected province's verified rate whenever you change province.
How much is GST/HST in Canada?
GST is 5% everywhere in Canada. Five provinces replace it with a blended HST: Ontario 13%, Nova Scotia 14%, and New Brunswick, Newfoundland and Labrador and Prince Edward Island 15%. British Columbia, Saskatchewan, Manitoba and Quebec add a separate provincial tax on top of the 5% GST. The territories and Alberta charge GST only.
What this calculator works out
Canada runs three different sales tax systems at once, and which one applies depends on where the sale takes place rather than where your business is registered. This calculator holds all thirteen sets of rates and applies the right one once you choose a jurisdiction.
It works in both directions. Enter a shelf price and it adds the tax. Enter a receipt total and it strips the tax back out, which is what you need when you are claiming an input tax credit and the invoice only shows the total paid.
The breakdown splits the federal and provincial portions apart. That split matters for bookkeeping in the PST provinces, where the two taxes are remitted to two different governments on two different schedules.
How the calculation works
There are only two operations here, and the second is the one people get wrong.
Adding tax: total = price × (1 + rate ÷ 100)Removing tax: price = total ÷ (1 + rate ÷ 100)Tax amount = total − priceIn a GST + PST province the two taxes are added, not stacked:rate = 5 + provincial rate (not 1.05 × 1.07)
To take tax out of a total you divide, you do not subtract. Taking 13% off a $113 total gives $98.31, which is wrong — the tax was charged on the smaller pre-tax figure of $100, not on the total. Dividing by 1.13 reverses the original multiplication exactly.
The second point catches people in British Columbia, Saskatchewan, Manitoba and Quebec. The provincial tax there is calculated on the price before GST, so a 5% GST and a 7% PST come to 12% of the pre-tax price, not 12.35%.
Worked example: a $250 invoice in Ontario
You are invoicing a client in Ontario for $250 of consulting work and need to know what to bill and what to set aside.
- Amount before tax$250.00
- Ontario HST rate13%
- HST = 250 × 0.13$32.50
- Total to invoice = 250 × 1.13$282.50
Bill $282.50, of which $32.50 is HST you are holding on the CRA's behalf.
Reversing it: if the client had agreed a $282.50 all-in fee instead, dividing by 1.13 gives the same $250 before tax. The same invoice in Nova Scotia would carry $35.00 of HST at 14%, and in Alberta $12.50 of GST at 5%.
Where this trips people up
- Subtracting the rate from a total instead of dividing — it always removes too much
- Using 15% for Nova Scotia, which has charged 14% since 1 April 2025
- Treating GST and PST as compounding, when both are charged on the pre-tax price
- Charging your own province's rate rather than the rate where the customer is
- Assuming Quebec's QST works like an HST — it is a separate provincial tax with its own return
Assumptions and limits
This calculator applies the standard rate for a fully taxable supply. It does not handle the exceptions, and there are a few worth knowing about.
- Zero-rated supplies such as basic groceries and prescription drugs are taxed at 0% everywhere
- Exempt supplies such as most health and education services carry no GST/HST at all
- Some provinces exempt specific goods from PST while still charging GST on them
- Place-of-supply rules for digital services and cross-province sales can differ from the simple case
- First Nations, diplomatic and government purchasers may be relieved of tax on certain supplies
If your situation falls into one of those, the CRA's place-of-supply guidance linked below is the right place to check before you invoice.
Terms on this page
- Place of supply
- Where a sale is treated as happening for tax purposes. It decides which rate you charge, and it follows the customer rather than your own registration.
- Input tax credit
- The GST/HST you paid on business purchases, which you claim back against the tax you collected. This is why reversing a total to find the tax matters.
- Zero-rated
- Taxable at 0%. Basic groceries and prescription drugs are zero-rated, so no tax is charged but input tax credits can still be claimed.
- Exempt supply
- Outside the GST/HST system altogether — most health and education services. No tax is charged and no input tax credit is available.
- Participating province
- One that has harmonised its provincial tax into the HST. Ontario, Nova Scotia, New Brunswick, Newfoundland and Labrador, and Prince Edward Island.
What has changed, and when
Rates on this page have not always been what they are today. If you are working on an earlier period, use the figure that applied at the time rather than the current one.
- From 1 April 2025 Nova Scotia HST fell to 14%, the provincial share dropping from 10% to 9%. Every other rate is unchanged.
- Until 31 March 2025 Nova Scotia charged 15%. Invoices dated before the change still carry the old rate, and the CRA published transitional rules for supplies spanning it.
Common questions
Which provinces charge HST?
Five: Ontario at 13%, Nova Scotia at 14%, and New Brunswick, Newfoundland and Labrador and Prince Edward Island at 15%. HST is a single blended tax that the Canada Revenue Agency administers on behalf of both governments, so you file it on one return.
Why is Nova Scotia 14% and not 15%?
Nova Scotia reduced the provincial portion of its HST from 10% to 9% effective 1 April 2025, taking the combined rate from 15% to 14%. A number of calculators and price lists have not been updated since. Invoices dated before 1 April 2025 still carry the old 15% rate.
Do I charge my province's rate or my customer's?
The rate is set by the place of supply, which for most goods is where they are delivered and for most services is the customer's address. A Toronto business shipping to Calgary charges 5% GST, not 13% HST. The CRA publishes detailed place-of-supply rules for the cases where this is less obvious.
Is PST charged on top of GST?
No. In British Columbia, Saskatchewan and Manitoba the provincial sales tax is calculated on the selling price before GST, so the two taxes sit side by side rather than stacking. Quebec has worked the same way since 2013. Compounding them overstates the tax.
How do I work out the tax when I only have the total?
Divide the total by one plus the rate as a decimal. A $113 Ontario total divided by 1.13 gives $100 before tax, so the HST was $13. Switch this calculator to "tax included" and it does that for you, including the federal and provincial split.
Where these numbers come from
- Canada Revenue Agency — Charge and collect the GST/HST: which rate to charge The rate table for all 13 provinces and territories, including PST.
- Canada Revenue Agency — Nova Scotia HST rate decrease, transitional rules Confirms the 15% to 14% change effective 1 April 2025.
- Revenu Québec — GST and QST rates Confirms QST is calculated on the price excluding GST.
Last verified 2026-08-01 Rates on this page are checked against the sources above at least once a year, and whenever the governing authority announces a change. Spotted something out of date? Tell us and we will fix it.
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