GST and QST Calculator 2026 Quebec
Calculate GST and QST from pre‑tax amount
Reverse calculator: find pre‑tax amount from total (GST+QST included)
Quick tax breakdown: examples for Quebec 2026
| Pre-tax price (CAD) | GST (5%) | QST (9.975%) | Total (taxes included) |
|---|---|---|---|
| $100.00 | $5.00 | $9.98 | $114.98 |
| $250.00 | $12.50 | $24.94 | $287.44 |
| $500.00 | $25.00 | $49.88 | $574.88 |
| $1,000.00 | $50.00 | $99.75 | $1,149.75 |
| $5,000.00 | $250.00 | $498.75 | $5,748.75 |
How to calculate GST and QST in Quebec (simple method)
If you’re in Quebec, the gst and qst calculator must reflect both federal Goods and Services Tax (GST 5%) and provincial Quebec Sales Tax (QST 9.975%). Unlike other provinces, QST is applied on the pre‑tax amount separately — not on the GST-inclusive price. The standard formula is:
Total = Price × (1 + 0.05 + 0.09975) = Price × 1.14975. For example, a $250 item before taxes becomes $287.44 after adding both taxes. Our calculate gst and qst tool above instantly gives you precise figures, whether you are a student, freelancer, or merchant.
Step-by-step: manual calculation example
Suppose you sell handmade goods worth $420 CAD before tax. GST = 420 × 0.05 = $21.00; QST = 420 × 0.09975 = $41.895 → $41.90. Total = 420 + 21 + 41.90 = $482.90. Using the gst and qst reverse calculator above, if a customer pays $574.88 total, the pre‑tax price is $500 exactly.
Simplified method for calculating GST and QST rebates (business edition)
For Quebec businesses registered for GST/QST, Input Tax Credits (ITCs) and Input Tax Refunds (ITRs) allow you to recover the tax paid on business expenses. The detailed method for calculating GST and QST rebates involves tracking every taxable purchase. However, small businesses may qualify for the simplified method for calculating GST and QST rebates (Quick Method) if annual revenue is under $400,000. Under this method, you remit a lower percentage of your total GST/QST collected and keep the difference. Exclusive insight for 2026: Revenu Québec updated the QST rebate thresholds; always reconcile using a tool like our calculator to estimate quarterly remittances.
How do you calculate GST and QST in Quebec for different scenarios?
Whether you are an online seller, a contractor, or a consumer, you need precise numbers. The calculate qst and gst formulas are identical for all goods except zero‑rated items (basic groceries, prescription drugs). Use the forward calculator for invoices, or the reverse tool when you receive a total amount and need to separate taxes for accounting. Our taxt sale calculation gst and qst download is not required – the interactive tools above do the work instantly.
GST and QST quick reference checklist
- ✓ Always verify if the price is “before taxes” (pre‑tax) or “after taxes” (tax included).
- ✓ GST = pre‑tax amount × 0.05 | QST = pre‑tax amount × 0.09975.
- ✓ For reverse calculation: pre‑tax = total amount ÷ 1.14975.
- ✓ Keep records for ITC claims – you need original invoices showing QST and GST separately.
- ✓ Use our how to calculate gst and qst from total method to audit supplier invoices.
Common mistakes when calculating GST and QST
1. Applying QST on the GST-inclusive amount – incorrect (QST applies on pre‑tax price only). 2. Using wrong QST rate (before 2013 the rate was different; current 9.975% since 2013, no changes for 2026). 3. Forgetting to round to two decimals (CRA and Revenu Québec require standard rounding). Our gst and qst calculator automatically handles rounding and delivers accurate results, ideal for calculate gst and qst quebec compliance.
Historical QST rates (quick reference)
| Year | QST rate | GST rate |
|---|---|---|
| 2026 | 9.975% | 5% |
| 2013-2025 | 9.975% | 5% |
| 2012 | 9.5% | 5% |
Note: QST has remained stable at 9.975% for over a decade, making calculations consistent.
Frequently asked questions – GST & QST
Divide the total amount by 1.14975 to get the original pre‑tax price. Example: $1,149.75 ÷ 1.14975 = $1,000. Then GST = $50, QST = $99.75.
GST (5%) is federal, applies across Canada. QST (9.975%) is provincial, specific to Quebec. Both are collected on most goods and services.
Yes, basic groceries, prescription drugs, medical devices, and some educational services are zero-rated or exempt. Always check Revenu Québec guidelines.
Yes, registered businesses can claim Input Tax Credits (ITC) for GST and QST paid on eligible purchases used for commercial activities.
Add GST and QST rates: 5% + 9.975% = 14.975%. Multiply the pre-tax amount by 0.14975 to get total taxes, then add to the base amount.
As of March 2026, the QST rate remains 9.975%. No official increase has been announced.
Important disclaimer – tax estimates
This gst and qst calculator provides estimates based on standard Quebec rates (GST 5%, QST 9.975%) for 2026. Actual tax obligations may vary depending on specific exemptions, rebates, or industry regulations. Always consult a tax professional or Revenu Québec for official filings. TotalCalcHub is not liable for any financial decisions made solely using this tool.