Start from a total with tax in it, and find the price before tax and the tax amount. No account needed.
Updated
The short answer
Price before tax = total ÷ (1 + rate). In Ontario, divide by 1.13: a total of $113 is a price of $100.00 and HST of $13.00.
Do not take the percentage off the total. 13% of $113 is $14.69, which overstates the tax. Pick your province below. Results are estimates.
An estimate. Runs in your browser. Nothing you type is sent anywhere.
Use the place of supply, which is often where your client is. It is not always where you are.
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.
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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To start from a price, use the HST calculator or the GST calculator.
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% |
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 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.
Divide the total by 1 plus the rate. In Ontario, $113 ÷ 1.13 = $100, so the HST is $13.
Because the tax was added to the smaller price. 13% of $113 is $14.69, which is too much. Dividing by 1.13 gives the right $13.00.
Yes, as an estimate. The calculator divides by the combined rate, then shows GST and PST or QST on their own lines. Clear the box if the sale had no PST or QST.
You can use it to see the split, but the tax printed on the receipt is the record. If the two differ by a cent, go by the receipt.
It gives an estimate. When there are two taxes, the last one takes any odd cent, so the parts always add up to the total you entered.
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Not ready? Try the free invoice generatorThis 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.