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Canada
Canadian GST/HST number
The GST/HST number is a specific type of Business Number (BN) used for Goods and Services Tax (GST) and Harmonized Sales Tax (HST) purposes. It consists of the 9-digit BN followed by the letters "RT" and a 4-digit account identifier, often starting at "0001".
We currently do not have access to official registries for this identifier, nor is there a public algorithm to validate its format. As a result, we can only perform a basic check to ensure the identifier matches the expected length and character set.
This identifier follows a strict format, here represented as X = alphanumeric character, A = letter, 0 = digit, and # = alphanumeric or special character (*, +, ?).
Example of syntactically valid Canadian GST/HST number
GST12345 6789 RT0001The following registries can be used to manually verify this identifier
CRACanada Revenue Agencyca-craCanadian GST/HST number
Syntax 12345 6789 RT0001
Verification API
Use our API to verify any GST/HST number from Canada in real-time and get detailed information about the associated entity, ensure its presence in the registry of record, see the registered address, and more.
curl -X GET "https://verifyvat.com/api/verify/ca_gst/123456789RT0001" \
-H "x-api-key: {your_api_key}"
# You can also use query parameters with a GET request:
curl -X GET "https://verifyvat.com/api/verify?type=ca_gst&id=123456789RT0001" \
-H "x-api-key: {your_api_key}"
# Or via JSON body with a POST request:
curl -X POST "https://verifyvat.com/api/verify" \
-H "Content-Type: application/json" \
-H "x-api-key: {your_api_key}" \
-d '{"type":"ca_gst","id":"123456789RT0001"}'curl -X GET "https://verifyvat.com/api/types/ca_gst"
# Via query parameters with a GET request:
curl -X GET "https://verifyvat.com/api/id-types?id=ca_gst"
# Or via JSON body with a POST request:
curl -X POST "https://verifyvat.com/api/id-types" \
-H "Content-Type: application/json" \
-d '{"id":"ca_gst"}'Format API
Explore the format and validation rules of this identifier, and implement the verification logic in your platform.
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Whether you’re checking one company or building verification into your product, VerifyVAT gives you instant access to official business data: clear, accurate, and always up to date. No fluff, no guesswork, just the facts you need from the sources that matter.