GST/HST Calculator Canada
Add or extract Canadian GST/HST for pricing, invoicing, and planning.
Quick answer
GST/HST Calculator Canada helps estimate the result from your inputs in the browser. Use the output as a planning number, then compare it with your records, provider terms, or official guidance before making a final decision.
This calculator is for estimates only. Canadian tax rules vary by province and situation, so verify before filing or invoicing.
Calculator
Results update as you type
Total price
Ontario uses HST for this table. Verify the place-of-supply and type-of-supply rules before charging or filing tax.
Breakdown
Example
Canadian tax planning keeps the math simple: it shows the before-tax and after-tax values instantly in the browser.
Formula
The math behind the result
How it works
A clean flow from input to answer
- 1Enter the price before tax or price with tax depending on your use case.
- 2Use the default 13% HST rate or enter the Canadian tax rate you need to model.
- 3Read the tax amount and final total instantly.
FAQ
Common questions
Does this calculate provincial rates?
It can model any combined rate you enter, which is useful for GST/HST planning at a practical level.
Is this a filing tool?
No. It is a planning calculator, not a tax filing replacement.
Can I use it for invoices?
Yes. It is useful for estimating the tax portion before creating an invoice.
Does it work in reverse?
Yes. You can extract the tax base from a tax-inclusive price as well.
Is anything stored?
No. The calculation stays local in the browser.
Select the Canadian tax based on place of supply
GST or HST depends on the applicable place-of-supply rules, not simply the seller's address. Provinces using HST have one combined rate, while GST provinces may also impose a separate PST or QST administered under different registration, invoice, and recovery rules.
To extract tax from a tax-inclusive total, divide using the applicable fraction rather than subtracting the headline percentage. A $113 total at 13% HST contains $13 tax and a $100 base; subtracting 13% of $113 would produce the wrong result.
Confirm whether the supply is taxable, zero-rated, exempt, or outside scope. Input tax credits generally relate to GST/HST paid on eligible business purchases, while some provincial sales taxes are not recovered the same way. Keep supporting invoices for the actual reporting process.
Registration thresholds, digital supplies, imports, interprovincial services, and Quebec administration require current CRA or Revenu Québec guidance. The calculator performs rate arithmetic for the province selected; it does not decide registration or prepare a return.
Verification
Official sources, limits, and fixtures
Verified 2026-08-10
Sources
- https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses/charge-collect-which-rate/calculator.html
- https://www.revenuquebec.ca/en/businesses/consumption-taxes/gsthst-and-qst/basic-rules-for-applying-the-gsthst-and-qst/
- https://www2.gov.bc.ca/gov/content/taxes/sales-taxes/pst
- https://www.gov.mb.ca/finance/taxation/pubs/bulletins/register.pdf
- https://sets.saskatchewan.ca/rptp/portal/footer/taxinformation/provincial-sales-tax/
Current limits
- Rate-table and invoice-planning scope only; exemptions and special place-of-supply cases are outside this release.
- Does not cover payroll, income-tax, or filing workflow completeness.
Known fixtures
Ontario add tax
base=100 rate=13
Expected: tax=13 total=113
Quebec add tax
base=100 rate=14.975
Expected: tax=14.975 total=114.975