Singapore GST Number Validator
Online Singapore GST Registration Number validator supporting both corporate UEN (ACRA) and M-series (IRAS/OVR) formats.
Singapore GST Verification
Verifies tax compliance against Inland Revenue Authority of Singapore (IRAS) standards.
Essential for cross-border e-invoicing and accounting software.
GST Number Anatomy & Structure
Tax identifier issued by IRAS:
| Position | Field | Length | Meaning & Specification | Example |
|---|---|---|---|---|
| Local | Standard UEN | 9 or 10 characters | Corporate UEN with checksum | 202412345B |
| Foreign | M-Series | 9 or 10 characters | Begins with M for OVR suppliers | M98765432X |
Validation Algorithm (IRAS)
Integrated tax checksum verification:
Modular validation for UEN or M-series format.
- 1. Check whether string matches standard ACRA UEN structure.
- 2. Alternatively check for IRAS special M-series regex.
- 3. Confirm valid length and alphanumeric integrity.