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Canadian General Sales Tax

Apply dated general GST, HST and provincial sales-tax rates to a fully taxable Canadian sale.

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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

A fully taxable Quebec sale of 100 has GST of 5 and QST of 9.975, giving 114.975 before invoice rounding.

Gross price = net price Ă— (1 + GST + HST + PST/QST).

Worked example

Enter these known values and leave the other values blank.

Select your province or territory:
Quebec
Amount before tax
100
GST (5%)
5
QST (9.975%)
9.98
Amount after tax
114.98

Assumptions and limitations

  • Rate snapshot independently checked October 13, 2026. Nova Scotia uses 14% HST effective April 1, 2025; Quebec QST is 9.975% of the price excluding GST.
  • This assumes the entire sale is subject to the selected jurisdiction’s general rates. Exemptions, zero-rated supplies, special rates, transitional rules and place-of-supply determinations are outside the model.
  • Amounts use unrounded arithmetic. Invoice-level rounding and mixed-taxability purchases may differ.
  • Enter all money amounts in one currency. The retained currency conversion menu uses captured historical conversion factors, not current exchange quotes.
  • Clear an unknown editable field before solving an inverse; fixed selections and output-only fields cannot be inferred.

Common questions

What does this calculation assume?

Rate snapshot independently checked October 13, 2026. Nova Scotia uses 14% HST effective April 1, 2025; Quebec QST is 9.975% of the price excluding GST.

Are these current exchange rates?

No. Use one currency consistently; currency menu factors are a historical snapshot.

References

Correct the captured Nova Scotia HST rate to 14 percent effective April 1, 2025, independently checked October 13, 2026. Add independently reviewed discrete-count, denominator and bounded-probability requirements.

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