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Free GST calculator for Canada.

Add GST to a price or take it out of a total, by province, with PST and QST on their own line. No account needed.

Updated

The short answer

GST is 5%. Multiply the price by 0.05 to get the GST. On a $100 price, GST is $5.00, and the total is $105.00.

To take GST out of a total, divide by 1.05. Provinces with HST use one combined rate, and BC, Manitoba, Saskatchewan and Quebec add their own tax. Pick your province below. Results are estimates.

Add or remove GST

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An estimate. Runs in your browser. Nothing you type is sent anywhere.

What do you want to do?

Use the place of supply, which is often where your client is. It is not always where you are.

Total with tax
$105.00
Price before tax
$100.00
GST (5%)
$5.00
No separate provincial tax
—

Rates checked with the CRA on October 31, 2026. Tax can change with what you sell and where you supply it, so treat this as an estimate. A cent or two of rounding can differ on a real invoice.

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Biller's invoice form has fields for your tax rate and GST/HST number, and settings keep a default rate for your province. Clients can pay by e-Transfer or card.

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The formulas

The rates, by province and territory

The table comes from the rates Biller uses in its own invoices. We checked them against the CRA's GST/HST calculator page on October 31, 2026.

Province or territory GST or HST PST or QST Combined
Alberta 5% GST None 5%
British Columbia 5% GST 7% PST 12%
Manitoba 5% GST 7% PST 12%
New Brunswick 15% HST None 15%
Newfoundland & Labrador 15% HST None 15%
Northwest Territories 5% GST None 5%
Nova Scotia 14% HST None 14%
Nunavut 5% GST None 5%
Ontario 13% HST None 13%
Prince Edward Island 15% HST None 15%
Quebec 5% GST 9.975% QST 14.975%
Saskatchewan 5% GST 6% PST 11%
Yukon 5% GST None 5%

PST and QST are separate taxes

British Columbia, Manitoba, Saskatchewan and Quebec charge GST plus their own sales tax. The CRA's table shows those rates, but the provinces run those taxes. The calculator shows each tax on its own line, and you can clear the box if a sale has no PST or QST.

Whether PST or QST applies depends on what you sell. A combined rate is an estimate, not a ruling. Check with the province, or with Revenu Québec for QST. The CRA says, "If provincial sales tax (PST) is charged in the place of supply, calculate the GST on the price without the PST." The calculator works that way.

The rate depends on the place of supply

The CRA says the rate depends on the place of supply, which it describes as the province or territory where a taxable sale, lease or other supply is considered to be made. That is not always where your business is. Some supplies have no tax at all: the CRA says "a zero-rated supply has a 0% GST/HST rate throughout all of Canada."

If you are not registered for GST/HST, you do not charge it. See the GST/HST registration guide for when you must register.

These results are estimates, not tax advice. The CRA also says rounding can move a total by a cent or two. Confirm your own situation with the CRA or a tax professional. Rates checked on October 31, 2026.

Questions

How do I calculate GST?

Multiply the price before tax by 5%. On $100, GST is $5, and the total is $105.

How do I remove GST from a total?

Divide the total by 1.05. On a total of $105, the price before tax is $100, and the GST is $5. That works only where GST is the single tax. Where PST or QST also applies, use the calculator.

Which provinces charge only GST?

Alberta, the Northwest Territories, Nunavut and Yukon. The table on this page shows every province and territory.

Do I charge my client's province or mine?

The rate depends on the place of supply, which is often where the client receives the supply, but not always. See the CRA's page on which rate to charge.

Is this calculator exact?

It gives an estimate. It rounds each tax to the cent, and an invoice from your own system may differ by a cent or two. It also cannot tell whether your particular sale is taxable.

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About this information

This page is general information, not financial, legal, or tax advice. We gathered it from public sources (banks, payment providers, government agencies such as the CRA, and published industry rates), and it reflects our understanding when it was last updated. Rates, limits, fees, and rules change without notice, and your situation may differ from the general case.

Before you rely on anything here, do your own due diligence: confirm the details with the original source, and check that they are still current. For advice about your own finances, taxes, or legal position, hire a qualified professional such as an accountant, lawyer, or financial advisor. See our Terms for the full disclaimer. Last updated October 31, 2026.