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Canada TIN validator
Check whether a Canada SIN / BN follows the expected structure before you save it, send it to an API, or include it in a tax workflow.
Private by design
Your data stays in your browser
None of the TIN data you enter is ever saved to our servers — validation runs entirely on your device.
Validation Workspace
Validate SIN / BN
Enterprise checks for Canada tax identification numbers.
Instant one-by-one format validation
How Canada tax IDs are formatted
In Canada, the tax identifier is commonly known as Social Insurance Number / Business Number (SIN / BN). The expected format is SIN: 9 digits (XXX XXX XXX), BN: 9 digits + 2 letter program identifier. Teams usually need a Canada SIN / BN check around tax filing, employment, government benefits, or before a record moves into billing, onboarding, or compliance review.
Valid examples
123 456 789123456789RC0001
Invalid examples
- 123 456 78 (Too short)
- 000 000 000 (Invalid)
What this validator checks
Format and length
Confirms the number follows the expected Canada pattern: SIN: 9 digits (XXX XXX XXX), BN: 9 digits + 2 letter program identifier.
Useful examples
Shows valid and invalid-looking samples so you can compare spacing, separators, letters, and digit counts before submitting real data.
Letter placement
Checks letter positions where the SIN / BN format requires alphabetic prefixes, suffixes, or program identifiers.
When people usually check this number
- Tax filing
- Employment
- Government benefits
- CPP/EI contributions
A format match does not prove that a Canada tax ID belongs to a specific person or business. Use the result as a first-pass data quality check, then confirm sensitive cases with official records.
Official source: Canada Revenue Agency
Last reviewed: May 23, 2026. We update country guidance when public format rules change.
How to check a Canada SIN / BN
Use this check before a record reaches billing, tax reporting, or manual review.
Enter the SIN / BN
Paste or type the Canada tax identifier exactly as it appears in your source record. Spaces and separators are fine when they are part of the expected format.
Review the format result
Check whether the number matches the known Canada structure, including length, separators, letters, and checksum rules where public guidance includes them.
Confirm important records
For onboarding, tax reporting, or compliance work, treat the result as a data-quality signal and confirm high-risk records with Canada Revenue Agency or your internal process.
Frequently asked questions
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