South Africa UIF / COIDA Reference Generator
Generate valid South African UIF / COIDA employer reference numbers with Luhn Modulo 10 algorithm and official 8-digit format for payroll and HR testing.
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About UIF and COIDA in South Africa
The Unemployment Insurance Fund (UIF) and Compensation for Occupational Injuries and Diseases Act (COIDA) are statutory social security schemes administered by the South African Department of Employment and Labour (DEL).
Every employer registered with the Department receives an 8-digit reference number composed of a 7-digit sequential sequence and a final Luhn check digit (Modulo 10).
UIF / COIDA Reference Anatomy
Structure of the 8 numeric digits of the South African employer reference:
| Position | Field | Length | Meaning & Rule | Example |
|---|---|---|---|---|
| 1 to 7 | Sequential Reference | 7 digits | Employer base registration number assigned by the Department of Employment and Labour | 1234567 |
| 8 | Check Digit (CD) | 1 digit | Checksum digit calculated with standard Luhn Modulo 10 algorithm | 4 |
Validation Rules and Luhn Algorithm
Mathematical checksum calculation:
Luhn Checksum: Σ(weighted digits with alternating x1 and x2 parity) mod 10 = 0.
- 1. Strip optional 'U' prefix, slashes ('/'), or spaces to obtain 8 digits.
- 2. Ensure the string contains exactly 8 decimal digits.
- 3. Reject references with all identical digits or all zeros.
- 4. Apply Luhn Modulo 10 algorithm across all 8 digits to verify integrity.
Frequently Asked Questions (FAQ)
Are the generated UIF / COIDA references real?
No. All numbers are synthetically generated following official mathematical rules solely for software testing and QA purposes.
What is the relationship between UIF and SARS in South Africa?
Employers pay UIF monthly contributions (1% employer + 1% employee) either via SARS EMP201 monthly return or directly to the Unemployment Insurance Commissioner.
How is the UIF / COIDA check digit calculated?
The 8th digit is computed from the first 7 digits using the standard Luhn Modulo 10 checksum algorithm.