Tax & Discounts
GST Calculator
Add or remove GST, with an optional provincial PST/QST shown separately.
Result
Net amount
$100.00
GST amount
$5.00
PST / QST amount
$0.00
Total tax
$5.00
Gross amount
$105.00
How it's calculated
GST and PST/QST are each charged on the net price and shown separately. When removing tax, net = gross ÷ (1 + GST + PST).