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Singapore TIN validator
Check whether a Singapore NRIC / FIN / UEN 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 NRIC / FIN / UEN
Enterprise checks for Singapore tax identification numbers.
Instant one-by-one format validation
How Singapore tax IDs are formatted
In Singapore, the tax identifier is commonly known as National Registration Identity Card / Unique Entity Number (NRIC / FIN / UEN). The expected format is NRIC/FIN: letter + 7 digits + letter, UEN: varies by entity type. Teams usually need a Singapore NRIC / FIN / UEN check around tax filing, employment, banking, or before a record moves into billing, onboarding, or compliance review.
Valid examples
S1234567DT1234567A201234567K
Invalid examples
- S1234567X (Invalid check letter)
- S123456 (Too short)
What this validator checks
Format and length
Confirms the number follows the expected Singapore pattern: NRIC/FIN: letter + 7 digits + letter, UEN: varies by entity type.
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 NRIC / FIN / UEN format requires alphabetic prefixes, suffixes, or program identifiers.
When people usually check this number
- Tax filing
- Employment
- Banking
- Government services
A format match does not prove that a Singapore 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: Inland Revenue Authority of Singapore
Last reviewed: May 23, 2026. We update country guidance when public format rules change.
How to check a Singapore NRIC / FIN / UEN
Use this check before a record reaches billing, tax reporting, or manual review.
Enter the NRIC / FIN / UEN
Paste or type the Singapore 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 Singapore 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 Inland Revenue Authority of Singapore or your internal process.
Frequently asked questions
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