Compute Canadian GST (5%) and Quebec QST (9.975%) on a price.
Please do not make financial decisions based on these results.
What is the GST/QST Calculator for Canada?
Compute Canadian GST (5%) and Quebec QST (9.975%) on a price. To use the GST/QST Calculator for Canada, enter price before tax; it returns total price, gst (5%), qst (9.975%), and shows them instantly as you type.
Where the GST/QST Calculator for Canada fits
Compute Canadian GST (5%) and Quebec QST (9.975%) on a price. The main figure it returns is the Total price, worked out from the values you enter.
It belongs with the other tax & salary tools. If you are comparing options or checking a result from another angle, try the GST Calculator, Ohio Sales Tax Calculator or the Overtime Calculator.
How to use the GST/QST Calculator for Canada
- Enter your numbers. Start with Price before tax (C$). Use the tax year and filing status that apply to you, and gross figures unless a field says otherwise. Fields marked optional can stay at zero.
- Read the result. The highlighted box gives the Total price, and the cards below show GST (5%), QST (9.975%). Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the GST/QST Calculator for Canada using the default values shown in the calculator above:
Inputs
| Price before tax (C$) | 100 |
|---|
Results
| Total price | $114.98 |
|---|---|
| GST (5%) | $5.00 |
| QST (9.975%) | $9.98 |
With these inputs the calculator returns Total price: $114.98. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Price before tax (C$) from 100 to 120 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| Total price | $114.98 | $137.97 | +20% |
| GST (5%) | $5.00 | $6.00 | +20% |
| QST (9.975%) | $9.98 | $11.97 | +20% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the GST/QST Calculator for Canada reports Total price, gst (5%) and qst (9.975%). Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. Tax rules change every year and depend on your full situation (state, filing status, credits), so treat the result as an estimate and confirm it with the IRS or a tax professional. It is for information, not financial, tax or legal advice.
Frequently asked questions
Is QST charged on GST?
No. Since 2013 QST is calculated on the price before GST.
Which tax year and rates are used?
US federal brackets and standard deductions for 2026 and 2025, plus FICA. State tax is a rate you enter.
Is this tax advice?
No. Please do not make tax decisions based on these results. Use a tax professional for your actual return.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
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