Alberta Reverse GST Calculator
Alberta is GST-only at 5%—no PST or HST. Divide tax-included totals by 1.05; do not use Ontario 1.13 or BC 1.12 on Alberta receipts.
Enter the total you paid (GST included) and your rate.
Step 2 — Your breakdown
We reverse the tax using the standard formula:
Enter a total and tax rate to see your breakdown.
C$105 out the door is usually C$100 pretax plus C$5 GST. The same pretax price in BC might total C$112 and in Ontario C$113.
National ecommerce sites sometimes mis-apply HST to Alberta addresses—fix checkout tables to 5% GST on Alberta shipments.
Red Deer and Lethbridge retailers advertising tax-included prices still owe buyers a pretax breakdown on B2B quotes when GST registration numbers appear on the invoice.
Calgary and Edmonton buyers comparing tax-included field gear need divisor 1.05, not coastal provincial rates. Input Tax Credits still require splitting GST from inclusive invoices.
Oilfield services and agricultural cooperatives often bundle exempt and taxable lines on one ticket—reverse GST only on lines where tax was actually charged before filing CRA returns.
Alberta warehouses shipping to Ontario must switch to 13% HST at destination, not 5% GST. Reverse each order at the delivery-province rate on the invoice, not the ship-from Alberta divisor.
Marketplace sellers headquartered in Calgary still collect destination tax on taxable ecommerce orders. A tax-included total on an Alberta receipt always uses 1.05; a Toronto delivery on the same platform uses 1.13 instead.
pretax = total ÷ 1.05. GST = total − pretax.
Document how tax-inclusive quotes were split before claiming Input Tax Credits on Edmonton and Calgary procurement—auditors expect pretax and GST lines to tie to POS exports.
| Rate | Category | Examples |
|---|---|---|
| 5% GST only | Typical combined rate | No provincial sales tax — only federal GST applies. |
| GST 5% | Federal component | Applies across Canada; provinces may add PST/HST on top. |
| Varies | Provincial portion | In Alberta, provincial rules determine the full rate on taxable goods and services. |
C$2,100 tax-included with 5% GST on C$2,000 pretax rental.
Pretax C$2,000 | GST C$100 | Total C$2,100
No provincial sales tax return—GST only through CRA. Charge destination-province tax on shipments outside Alberta. Keep digital copies of tax-inclusive invoices showing GST split for Calgary and Edmonton audit samples.
No—only 5% federal GST on most taxable supplies.
1.05 for standard taxable GST.
Ontario uses 13% HST; Alberta does not.
C$105 ÷ 1.05 = C$100 pretax, C$5 GST.
Some platforms mis-charge Ontario HST—correct to 5% GST and reverse at 1.05 on the fixed receipt.
