Canada GST/HST Calculator for Small Businesses
Calculate GST/HST payable and total amount for Canadian small-business transactions. Province-specific rates and authoritative sources are used. Not tax advice — consult a professional for complex or business-specific situations.
- Page updated:
- Jan 3, 2026
- Tool version:
- v1.1.0
Overview
This calculator estimates GST/HST (and common combined rates) for small-business supplies in Canada using province-specific rates. It is intended as a quick reference and not a substitute for professional tax advice.
Results
GST/HST (estimated)
$130.00
Total Amount (including tax)
$1,130.00
Notes
—
How to read the result
- What it means
- The displayed value is an estimate based on your inputs. It represents the calculated scenario under current assumptions, not a guaranteed amount.
- Calculation limits
- The model uses simplified formulas and cannot account for all variables in your specific case (local regulations, personal conditions, temporal changes).
- Next step
- Use the result as a starting point. Adjust parameters to compare scenarios and validate with a professional when needed.
Glossary+−
- GST
Goods and Services Tax — a federal value-added tax applied across Canada (5% standard rate).
- HST
Harmonized Sales Tax — combined federal and provincial sales tax used in some provinces (single blended rate).
- ITC
Input Tax Credit — a credit registrant businesses can claim to recover GST/HST paid on business purchases and expenses used in commercial activities.
Key takeaways
Use this tool to estimate GST/HST payable and the total amount for a transaction based on the selected province or territory.
For precise compliance tasks (registration thresholds, remittance, and ITC claims) follow CRA guidance or consult a tax professional.
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Useful links
Worked examples
Ontario sale
Sale of a service in Ontario for $1,000. Ontario HST is 13%.
Interpretation
Apply 13% HST to the net amount. Estimated GST/HST = $130, total = $1,130.
Alberta sale
Sale of goods in Alberta for $500. Alberta applies GST only (5%).
Interpretation
Apply 5% GST. Estimated GST = $25, total = $525.
Frequently asked questions
Does this calculator replace CRA guidance?
No. This tool provides estimates using common province-level rates. For authoritative rules on registration, place of supply, zero-rated supplies, and ITCs, consult the Canada Revenue Agency and provincial tax guides or a qualified tax advisor.
How are combined rates calculated for provinces with PST or QST?
This calculator shows typical combined effective rates (GST plus provincial component) for straightforward retail/service transactions. It does not model separate PST/QST filing or special provincial rules that can change the effective tax treatment.
Sources & references
- Canada Revenue Agency — GST/HST information for businesses: https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses.html
- Ontario Ministry of Finance — HST: https://www.ontario.ca/page/harmonized-sales-tax-hst
- Service Québec — QST (Quebec sales tax): https://www.revenuquebec.ca/en/businesses/consumption-taxes/
Quality & oversight
- Author
- Ugo Candido, MBA
- Maintained by
- Ugo Candido, MBA
- Page updated
- Jan 3, 2026
- Tool version
- v1.1.0