Remove GST, HST, PST, or QST from a Canada tax-inclusive total.
Reverse Sales Tax Calculator Canada
Use this Canada reverse tax page when a total includes GST, HST, PST, or QST and you need to estimate the amount before tax.
Rates are presets for quick estimates. Local, state, province, product, and invoice rules can vary, so replace the rate when your source shows a different value.
At 13% tax, $120.00 gross equals $106.19 before tax and $13.81 tax. View calculation formula
Remove tax from a total
Net price = gross total / (1 + sales tax rate / 100). The tax amount is the gross total minus the net price.
120 at 20% becomes 100 + 20
If the total is 120 and the tax rate is 20%, the pre-tax amount is 100 and the tax amount is 20.
Use the exact rate
Some countries, states, provinces, and products use reduced or combined rates. Change the rate when your invoice uses a different one.
reverse sales tax calculator Canada
Built for Canada tax-inclusive prices
Use this Canada reverse tax page when a total includes GST, HST, PST, or QST and you need to estimate the amount before tax.
Example at 13% Example HST
CA$113.00 total becomes CA$100.00 before tax
- Tax-inclusive total
- CA$113.00
- Pre-tax amount
- CA$100.00
- GST/HST/PST amount
- CA$13.00
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Canada GST/HST/PST rate source
Canadian tax can be GST-only, HST, GST plus PST, or GST plus QST depending on the province.
Change the default example rate to match the province and product category.
Canadian sales tax depends on province and may combine GST, HST, PST, or QST. Adjust the rate for the province.
Source: Government of Canada GST/HST
Last verified: 2026-06-23
FAQ
Why is the Canada sales tax rate editable?
Sales tax can vary by state, province, city, county, and product category. Enter the exact combined rate from your receipt or tax table.
Can I use this for Canada invoices?
Yes, for quick calculation support. Use the exact tax rate shown on the invoice and confirm compliance details with official guidance or an accountant.
Does this page include historical sales tax rates?
No. It focuses on the current default rate and lets you enter a custom rate when an older or special rate applies.
What is a reverse tax calculator?
A reverse tax calculator works backwards from a tax-inclusive total to estimate the pre-tax price and tax amount.
Is this tax advice?
No. This site provides calculation help only. Check official tax guidance or a qualified professional for compliance decisions.
Can I use a custom tax rate?
Yes. Enter any tax rate between 0 and 100 to match your invoice, country, state, province, or product category.
Results are for calculation support only and do not replace official tax rules, accounting advice, or professional tax guidance.