Canada charges federal Goods and Services Tax (GST) at a standard rate of 5% as of 2025. Use this calculator to add 5% GST to a net price or extract the GST already baked into a gross, tax-inclusive price. It returns the full net, tax and gross breakdown instantly and runs entirely in your browser. The rate field is editable if you need a different figure.
How it works
The calculator has two modes:
- Add tax — the amount you enter is the net price. It computes
tax = net × (rate ÷ 100)andgross = net + tax. - Remove tax — the amount you enter is the gross, tax-inclusive price. It recovers the net with
net = gross ÷ (1 + rate ÷ 100), thentax = gross − net.
The default rate is Canada’s 5% federal GST.
Example
A CA$100 net purchase at 5% GST:
| Mode | Input | Tax | Gross |
|---|---|---|---|
| Add tax | CA$100.00 | CA$5.00 | CA$105.00 |
| Remove tax | CA$105.00 | CA$5.00 | net CA$100.00 |
Federal GST rate is 5%. Most provinces also add PST or HST on top. This calculator covers the federal GST rate only.
All calculations run in your browser — no amounts or personal data are transmitted.