GST / HST Calculator

How to use the gst / hst calculator

Choose a province or territory and whether the amount is before tax or already includes GST/HST. To add tax, the tool multiplies the net amount by the selected rate. To reverse tax, it divides the tax-included amount by one plus the rate; simply subtracting the rate from the total would give the wrong base. This page calculates GST/HST only, not a complete combined provincial-tax bill.

Does this include PST or QST?

No. British Columbia, Manitoba, Saskatchewan and Quebec can have separate provincial taxes that are not included here. Use the custom sales-tax calculator with the appropriate combined treatment, or the official CRA calculator, when you need a broader estimate.

Are the rates current?

Rates were checked against the CRA on September 17, 2026. Nova Scotia uses 14% HST, effective April 1, 2025. These standard rates do not determine whether a supply is taxable, zero-rated or exempt.

How should I compare scenarios?

Start with the example, then replace every relevant value with your own figures. Keep the currency and time periods consistent. Change one assumption at a time and calculate again to see its effect. The initial values are examples, not recommended rates, prices or budgets. When comparing alternatives, include the same categories in each scenario so that a missing expense does not make one choice appear cheaper.

Can I save or share the result?

Use Copy summary for a concise text result, or Export CSV for the available figures. Calculations run in your browser; entered amounts are not uploaded by this tool. An exported file contains your information, so choose where to store or share it. Displayed amounts are rounded to two decimal places, while most intermediate calculations retain additional precision. Small differences from a bill or statement can therefore occur.

What should I check before using the numbers?

Read the calculation assumptions beside the result and confirm the inputs against the relevant quote, agreement or records. This tool provides an estimate based on those inputs, not an approval, market forecast or personalized financial recommendation. Refresh the calculation when your circumstances or the underlying terms change.

Reference: CRA: GST/HST calculator and rates