The Northwest Territories charges the federal 5% Goods and Services Tax (GST). There is no territorial or provincial sales tax, so the total standard sales tax rate is 5%.
Use this Northwest Territories GST calculator to add GST to a price or calculate the GST included in a tax-inclusive total.
Enter a value in any field—price before GST, GST amount or price after GST—and the other two values will be calculated automatically.
To use it as a reverse GST calculator, enter the GST-inclusive price. The calculator will determine the original price before tax and the GST included in the total.
Rate last checked: August 15, 2026.
The GST rate in the Northwest Territories is 5%. The territory does not charge a separate territorial sales tax, so the total standard sales tax rate is 5%.
Data source: Canada Revenue Agency
How to calculate GST in the Northwest Territories
To add 5% GST to a price, multiply the price before tax by 1.05:
Price including GST = Price before GST × 1.05
For example, on a $200 purchase:
- GST: $200 × 5% = $10.00
- Price including GST: $200 + $10.00 = $210.00
How to calculate reverse GST
To find the original price when GST is already included, divide the GST-inclusive price by 1.05:
Price before GST = Price including GST ÷ 1.05
For example:
$210 ÷ 1.05 = $200
The GST included in the total is $10. You can also enter the GST-inclusive amount in the calculator above to calculate the original price and GST automatically.
Why is there no territorial sales tax in the Northwest Territories?
The Northwest Territories does not levy its own general sales tax. Purchases are therefore generally subject only to the federal 5% GST, unlike provinces that also charge PST, QST or HST.
The federal government introduced GST in 1991. Since the Northwest Territories did not add a separate territorial sales tax, its standard sales tax rate has followed the federal GST rate. The GST decreased from 7% to 6% in 2006 and then to its current 5% rate in 2008.
For rates and calculators covering every province and territory, use our Canadian sales tax calculator.