In Alberta, only the 5% federal GST applies — there is no PST or HST. To add GST, multiply the price by 1.05; to remove it from a tax-included total, divide by 1.05. Enter your amount in this Alberta GST calculator and choose Add tax or Remove tax.
Calculate a price or receipt
Amount before tax$100.00
GST 5%$5.00
Total with tax$105.00
Example for a standard-rated sale in Alberta. Applicable provincial taxes are included. JavaScript is needed to change the amount or tax applicability.
To add tax, enter the price before tax. To remove tax, enter the total that already includes the selected taxes. If you change a provincial-tax switch, use the rate that actually applied to the purchase. The result estimates tax arithmetic; it does not determine an exemption, a registration obligation, or eligibility for an input tax credit.
How to calculate GST in Alberta
- GST = price before tax × 0.05
- Total = price before tax + the applicable tax amounts.
For a $100 purchase, GST is $5.00, and the total is $105.00.
| Price before tax | GST | Total |
|---|---|---|
| $20.00 | $1.00 | $21.00 |
| $100.00 | $5.00 | $105.00 |
| $500.00 | $25.00 | $525.00 |
| $1,000.00 | $50.00 | $1,050.00 |
| $2,500.00 | $125.00 | $2,625.00 |
Reverse GST in Alberta: take GST out of a total
If all the selected standard taxes were included, divide the total by 1.05 to estimate the price before tax. Multiply that unrounded base by each applicable rate to find the tax components. Do not subtract 5.00% directly from the total: that percentage was originally applied to a smaller, pre-tax amount. To remove tax for another province, use the reverse GST/HST calculator.
For a receipt showing $1,050.00, the unrounded base is $1,000.00. GST is $50.00. Compare the result with the supplier’s actual invoice. Separately rounded lines or tax components can cause a one-cent difference when reversing a rounded total.
| Total with GST | Price before tax | GST |
|---|---|---|
| $21.00 | $20.00 | $1.00 |
| $105.00 | $100.00 | $5.00 |
| $525.00 | $500.00 | $25.00 |
| $1,050.00 | $1,000.00 | $50.00 |
| $2,625.00 | $2,500.00 | $125.00 |
What this province setting does
Alberta has no general provincial sales tax; only the 5% GST applies to a standard taxable sale (CRA’s GST/HST rates). The territories also use GST without a general PST; an Alberta business can nevertheless have to charge another province’s HST on a supply made there.
Some supplies get the same GST/HST treatment in every province: basic groceries and prescription drugs are zero-rated, and most long-term residential rent and most health, medical and dental services performed by licensed physicians or dentists for medical reasons are exempt (see GST/HST exempt and zero-rated supplies). Neighbouring provinces add their own tax on top of the same 5% GST — Saskatchewan charges a 6% PST (Saskatchewan GST calculator) and British Columbia charges a 7% PST (BC GST calculator) — so a purchase that is subject to PST in those provinces carries more tax there than in Alberta. For the full provincial breakdown, see GST and HST rates across Canada.
Check the transaction before using the result
A seller’s head-office address does not by itself determine GST/HST. Delivery, the customer address associated with a service, the nature of the supply, and special rules can matter. Start with CRA’s place-of-supply guidance. A zero-rated or exempt supply does not use the standard rate in the examples above.
This is a sales-tax calculator, not an income-tax calculator or a GST/HST return. For business registration, see the GST/HST registration guide. For filing, use the return workflow.
For the broader provincial rules, see the Alberta sales-tax guide.