Calculator / Everyday money
GST/HST calculator for every province
Add or reverse current GST, HST, PST, RST, and QST for ordinary taxable purchases.
GST / HST calculator
Add or remove sales tax
Rates in effect October 1, 2026, from the CRA. Nova Scotia uses 14% from April 1, 2025. Historical transactions are not supported.
Total after tax
$113.00- Before tax 88%
- Tax 12%
- Subtotal
- $100.00
- HST (13%)
- $13.00
- Total
- $113.00
For an ordinary fully taxable supply. Zero-rated or exempt items, rebates, place-of-supply rules, and special product taxes are outside this estimate.
Before you rely on it
What to know
The assumptions and limits behind this estimate.
01
What this assumes
The selected amount is for a fully taxable supply in the chosen province or territory. Exempt, zero-rated, rebated, and specially taxed goods can produce different results.
02
Current rates
Rates in effect October 1, 2026, from the CRA, including Nova Scotia's 14% HST from April 1, 2025.
The method
How it's calculated
The steps the calculator follows, in order.
01
Find the combined rate
HST provinces have one rate. Elsewhere it is the 5% GST plus any provincial PST, RST or QST, each shown separately in the result.
02
Adding tax
Each tax is the amount times its rate, rounded to the cent. The total is the amount plus those taxes.
03
Removing tax
The total is divided by 1 plus the combined rate to find the amount before tax, then each tax is worked out from that. The rounded parts can differ from the total by a cent.
Example
A worked example
The calculator's starting values, worked through so you can check the result above.
Adding tax: a $100 purchase in Ontario has 13% HST, which is $13, for a total of $113. In Quebec the same purchase has 5% GST ($5) and 9.975% QST ($9.975, rounded to $9.98), for a total of $114.98.
Removing tax: $113 in Ontario divided by 1.13 is $100, so $13 of it is HST. Taking 13% of $113 instead would give $14.69, which is too much, because the tax was charged on $100, not on $113.
In Quebec, $100 including tax divided by 1.14975 is about $86.975, which rounds to $86.98. GST on that is $4.35 and QST $8.68. Those rounded parts add up to $100.01, a cent more than the total, so the calculator keeps your $100 and shows each part to the nearest cent.
Questions
Common questions
Short answers to what people often ask about this estimate.
Ontario at 13%, Nova Scotia at 14% and New Brunswick, Newfoundland and Labrador and Prince Edward Island at 15%. The other provinces and territories charge the 5% GST, plus PST in British Columbia (7%) and Saskatchewan (6%), RST in Manitoba (7%) and QST in Quebec (9.975%). Alberta and the territories charge GST only.
Divide the total by 1 plus the combined rate, for example by 1.13 in Ontario. Subtracting 13% of the total takes off too much, because the tax was charged on the smaller amount before tax.
It is the 5% GST plus the 9.975% QST. Both are charged on the price before tax, so they simply add together.
No. Basic groceries and prescription drugs are zero-rated, and many health, education and financial services are exempt from GST/HST. Provincial sales taxes have their own exemptions. The calculator fits ordinary, fully taxable purchases.
For GST/HST, goods usually take the rate of the province where they are delivered. Services follow more detailed place-of-supply rules. The calculator uses whichever province you choose.
Only if the rates haven't changed since. The calculator uses current rates; for example, Nova Scotia's HST was 15% before April 1, 2025.
Methodology
Methods and sources for every calculator
Every calculator documents its method, its assumptions and the official sources behind its rules.