Canada GST/HST Calculator
Calculation Results
What Is the Canada GST/HST Calculator?
The Canada GST/HST Calculator is a tax estimate tool that calculates the net amount, tax amount, and gross amount for a selected Canadian province or territory. It can add tax to a price before tax or remove tax from a total that already includes tax.
A Canada GST/HST calculator helps you estimate Canadian sales tax by province or territory. It uses the tax rates stored in the calculator, applies the selected add-tax or remove-tax method, and shows the net amount before tax, the tax breakdown, and the gross amount with tax included.
The calculator is useful when you need a quick estimate for invoices, receipts, checkout totals, pricing checks, or basic tax planning. It supports GST-only areas, HST provinces, and provinces that combine GST with PST, RST, or QST. Results are shown in Canadian dollars using CAD currency formatting.
How the Canada GST/HST Calculator Formula Works
The calculator uses the amount you enter, the selected province or territory, and the calculation type. Each province or territory has stored GST, PST, and HST rates. The tool converts each percentage to a decimal rate, adds the rates together, and then calculates the net amount, tax amounts, and gross amount.
For Add Tax, the entered amount is treated as the net amount before tax. The calculator multiplies the net amount by each active tax rate, then adds those tax amounts to get the gross amount. For Remove Tax, the entered amount is treated as the gross amount. The calculator divides it by one plus the combined tax rate to find the net amount.
- Net Amount: the amount before tax.
- Gross Amount: the total amount with tax included.
- GST Amount: net amount multiplied by the GST rate.
- PST, RST, or QST Amount: net amount multiplied by the stored provincial tax rate when used.
- HST Amount: net amount multiplied by the HST rate when the selected province uses HST in the calculator.
Example: choose Ontario, leave the calculation type as Add Tax, and enter $100.00. Ontario has a stored HST rate of 13%. The calculator treats $100.00 as the net amount. HST is $100.00 × 0.13 = $13.00. The gross amount is $100.00 + $13.00 = $113.00.
If you choose Remove Tax for Ontario and enter $113.00, the calculator treats $113.00 as the gross amount. It divides $113.00 by 1.13, giving a net amount of $100.00. The HST amount is then $13.00. Results are displayed as Canadian currency.
If the entered amount is zero, negative, blank, or not readable as a number, the calculator hides the results. It does not calculate separate taxes for exempt, zero-rated, or special-rule items.
How to Use the Canada GST/HST Calculator: Step by Step
- Enter the amount in the Amount ($) field. Use the price before tax if you plan to add tax, or the total price if you plan to remove tax.
- Select the province or territory from the Province / Territory menu. The calculator uses the stored tax rates for that location.
- Choose Add Tax (Exclusive) if your amount does not include tax yet. This calculates the gross total with tax added.
- Choose Remove Tax (Inclusive) if your amount already includes tax. This calculates the estimated amount before tax.
- Click Calculate to show the results. The output includes the net amount, the tax breakdown, and the gross amount.
- Click Reset to return the amount to $100.00, the province to Ontario, and the calculation type to Add Tax.
The net amount is the price before sales tax. The tax breakdown shows HST, GST, PST, RST, or QST only when the selected location uses that tax in the calculator. The gross amount is the total with tax included. Use the result as an estimate, not as official tax advice.
What Your Canada GST/HST Calculator Result Means
Your result depends on three things: the amount entered, the selected province or territory, and whether you add or remove tax. The calculator uses the stored tax structure for each location. Some locations show only GST, some show HST, and some show GST plus a provincial tax label such as PST, RST, or QST.
Tax rates used by the calculator
| Province or Territory | Tax Type Shown | Rate Used |
|---|---|---|
| Alberta, Northwest Territories, Nunavut, Yukon | GST | 5% |
| British Columbia | GST + PST | 5% GST and 7% PST |
| Manitoba | GST + RST | 5% GST and 7% RST |
| New Brunswick, Newfoundland and Labrador, Nova Scotia, Prince Edward Island | HST | 15% |
| Ontario | HST | 13% |
| Quebec | GST + QST | 5% GST and 9.975% QST |
| Saskatchewan | GST + PST | 5% GST and 6% PST |
When to add tax
Use Add Tax when you know the pre-tax price. This is common when setting a price, preparing a simple quote, checking a subtotal, or estimating what a customer may pay at checkout. The calculator keeps your entered amount as the net amount and adds the calculated tax amounts.
When to remove tax
Use Remove Tax when you know the tax-included total and want to estimate the price before tax. This is useful for receipt checks, bookkeeping estimates, or separating tax from a total payment. The calculator treats the entered amount as the gross amount and backs out the included tax.
Important limits
This calculator uses the tax rates stored in its code. It does not decide whether an item is taxable, zero-rated, exempt, or subject to a special rule. It also does not handle shipping rules, rebates, place-of-supply rules, business filing rules, or official CRA calculations. For tax-sensitive decisions, check current rules or speak with a qualified tax professional.
Frequently Asked Questions
What is a Canada GST/HST calculator?
A Canada GST/HST calculator estimates Canadian sales tax for a selected province or territory. This calculator can add tax to a pre-tax amount or remove tax from a tax-included amount. It displays the net amount, tax breakdown, and gross amount using Canadian dollar formatting.
How do I calculate GST or HST from a total price?
To calculate GST or HST from a total price, choose Remove Tax (Inclusive). The calculator treats your entered amount as the gross total, divides it by one plus the combined tax rate, and then calculates the tax amount from the estimated net amount.
What is the difference between Add Tax and Remove Tax?
Add Tax starts with a price before tax and calculates the total after tax. Remove Tax starts with a total that already includes tax and estimates the amount before tax. The same stored province or territory rates are used, but the starting amount means something different.
Does this calculator show PST, RST, and QST?
Yes, this calculator shows provincial tax labels when they apply in its stored rate table. British Columbia and Saskatchewan show PST, Manitoba shows RST, and Quebec shows QST. HST provinces show HST instead of separate GST and provincial tax lines.
Why does the calculator hide the result for zero or negative amounts?
The calculator hides the result when the entered amount is zero, negative, blank, or not readable as a valid number. Its calculation function only displays results for amounts greater than zero. This prevents showing a tax breakdown for an unusable input.
How accurate is this Canada GST/HST calculator?
This Canada GST/HST calculator is accurate to the rates and formulas stored in its code. It is still an estimate because real tax treatment can vary by product, service, province, exemption status, business situation, and current tax rules. It should not replace official tax advice.
Does this calculator work for the United States?
No, this calculator is built for Canadian GST, HST, PST, RST, and QST estimates. It does not calculate U.S. state or local sales tax. U.S. users can still use it when estimating Canadian tax amounts, but not for U.S. sales tax.