Canada GST/HST calculator
Add or extract the GST/HST component of one CAD amount. Choose the place of supply and treatment separately.
GST/HST only. This is not a complete Canadian sales-tax total. Separate PST and QST are excluded; professional tax review is pending.
Choose the independently determined place of supply and treatment. No rate is selected automatically.
Supported reference window: 1 April 2025–18 October 2026. Earlier/future dates and transitional transactions are not calculated. The date does not determine when tax becomes payable.
One CAD amount; up to two decimals and CAD 1,000,000,000,000. PST/QST, cash-payment rounding, rebates and filing calculations are excluded.
GST/HST only · separate PST/QST excluded
- Before GST/HST
- GST/HST component
- Subtotal + GST/HST only
Select a province or territory and a treatment to see the formula.
Tax-first nearest-cent display, exact half-cents up. One established amount only; not a complete invoice or tax-compliance check.
Source check: · CRA rate table · CRA rounding guidance. Professional tax review is pending.
Worked examples and provincial references
| Case | Place / input / mode | Before GST/HST | GST/HST | Subtotal + GST/HST |
|---|---|---|---|---|
| CRA RC4022 discounted subtotalIndependent published subtotal, GST and total; discount calculation not implemented. | AlbertaCAD 3,225.00 · add · 5% | CAD 3,225.00 | CAD 161.25 | CAD 3,386.25 |
| Ontario included HSTDerived arithmetic, not a separate official reverse example. | OntarioCAD 113.00 · remove · 13% | CAD 100.00 | CAD 13.00 | CAD 113.00 |
| Nova Scotia laptop scenarioDerived amounts from CRA's CAD 1,000 scenario and 14% rate; not transition eligibility. | Nova ScotiaCAD 1,000.00 · add · 14% | CAD 1,000.00 | CAD 140.00 | CAD 1,140.00 |
| Exact half-cent boundarySynthetic single-amount rounding check. | AlbertaCAD 0.10 · add · 5% | CAD 0.10 | CAD 0.01 | CAD 0.11 |
GST/HST reference by province and territory
CRA table for the reference period beginning 1 April 2025; source checked 18 October 2026. Establish place of supply and tax treatment separately.
| Place of supply | GST/HST reference | Separate tax excluded |
|---|---|---|
| Alberta | GST · 5% | No separate PST/QST component in this reference |
| British Columbia | GST · 5% | PST not calculated |
| Manitoba | GST · 5% | PST not calculated |
| New Brunswick | HST · 15% | No separate PST/QST component in this reference |
| Newfoundland and Labrador | HST · 15% | No separate PST/QST component in this reference |
| Northwest Territories | GST · 5% | No separate PST/QST component in this reference |
| Nova Scotia | HST · 14% | No separate PST/QST component in this reference |
| Nunavut | GST · 5% | No separate PST/QST component in this reference |
| Ontario | HST · 13% | No separate PST/QST component in this reference |
| Quebec | GST · 5% | QST not calculated |
| Prince Edward Island | HST · 15% | No separate PST/QST component in this reference |
| Saskatchewan | GST · 5% | PST not calculated |
| Yukon | GST · 5% | No separate PST/QST component in this reference |
How to add or remove GST/HST
Add tax: GST/HST = before-tax amount × rate ÷ 100. Reverse: GST/HST = GST/HST-only amount × rate ÷ (100 + rate). Round the tax component to cents first, exact half-cents up, then reconcile the other amount.
GST/HST is not always the full sales-tax charge. In British Columbia, Manitoba, Saskatchewan and Quebec, this tool excludes the separate provincial component. Do not extract GST from a receipt that includes PST or QST using a GST-only denominator.
Read the Canadian GST/HST guideScope, dates and unsupported cases
Reference window: 1 April 2025–18 October 2026. The starting date is the supported CRA table period, not the original introduction date of every rate. Nova Scotia's 14% reference follows the 1 April 2025 change; timing and transition rules require separate assessment.
Place of supply is not necessarily your home address or the seller's location. The tool does not determine registration, eligibility, point-of-sale rebates, provincial taxes, cash-payment rounding, imports, special supplies, multi-line invoices, credits or returns. Exempt and outside-scope selections clear results rather than becoming zero-rated.
RC4022's worked discounted subtotal is an independent arithmetic fixture. We do not implement its discount rules. Derived reverse examples and synthetic cent boundaries are labelled separately.
Official sources
Source assessment: 18 October 2026. Source retrieval and software tests do not constitute independent professional approval.