GST Calculator Canada

Calculate federal GST, provincial PST/RST, and combined HST for all Canadian provinces and territories. Add tax or extract tax.

Input Details

Amount

Province / Territory

Calculation Mode

Results

Ontario Tax Summary

Total (Tax Inclusive)

$113.00

Tax breakdown for Ontario (13% HST). Total tax is $13.00.

Pre-Tax Base Amount$100.00

HST Portion$13.00

Total Canadian Sales Tax$13.00

The Formula

Canadian Tax Math:

Total Tax Rate = GST Rate + PST Rate
Add Tax: Total = Amount × (1 + Total Tax Rate)
Extract Tax: Base = Amount ÷ (1 + Total Tax Rate)

Example Calculation

In Quebec (total rate 14.975%), for a $100 pre-tax service:
GST: $100 × 5% = $5.00 | QST: $100 × 9.975% = $9.98 | Total: $114.98

How to Use This Calculator

Enter the **Amount** you wish to calculate.
Select the Canadian **Province or Territory** from the drop-down list.
Choose to **Add Tax** (to find the final receipt total) or **Extract Tax** (to find the base cost from a receipt total).

When This Calculator is Useful

Use this calculator when **billing Canadian clients**, preparing corporate GST/HST return filings, or bookkeeping for provincial tax separations.

Disclaimer Note

All results are estimates based on standard business formulas and rates. Actual project costs, ROI, and rates may vary based on market conditions, specific requirements, and contract agreements.

Frequently Asked Questions

Goods and Services Tax (GST) is a federal tax (5%) applied nationwide. Provincial Sales Tax (PST or RST) is a separate tax charged by individual provinces on retail goods/services. Harmonized Sales Tax (HST) is a combined single tax merging federal GST and provincial sales taxes, administered by the Canada Revenue Agency (CRA) in participating provinces.

Currently, five provinces charge Harmonized Sales Tax: Ontario (13% HST), New Brunswick (15% HST), Nova Scotia (15% HST), Prince Edward Island (15% HST), and Newfoundland and Labrador (15% HST).

Quebec charges GST (5%) plus Quebec Sales Tax (QST) at 9.975%. Historically, QST was calculated compound (tax on tax), but since 2013, QST is calculated as a simple percentage on the base price before GST, matching other provincial sales tax structures.

In Canada, you do not have to register for GST/HST if your gross taxable sales (including global revenues) are under $30,000 CAD over four consecutive calendar quarters. This is known as the "Small Supplier" exemption. Once you cross this threshold, registration is mandatory.