Payroll costs

The Work Bonus / Special Conditions

8 September 2026

1. Definition

The work allowance, or special conditions allowance, is granted to employees working in the field who are subject to physically demanding conditions.

Two conditions emerge from this definition, and they are cumulative:

The requirement What it requires
1 Working in the field Work location: outside the office, outside a protected fixed facility
2 Being subject to physically demanding work The nature of the effort and the physical demands involved

Why the two conditions are not interchangeable. Field work does not necessarily involve physical strain; and physical strain can occur outside of the field.

The allowance targets the intersection of the two: simultaneous exposure to the stresses of fieldwork and to physical exertion.

2. Legal Basis

It was established by Decree No. 99-0892/MF-SG of May 18, 1999.

3. What Constitutes Hardship

Three pairs of stressors are cited.

The strain What it imposes on the body
Depth and height Work above ground level: excavations, trenches, scaffolding, elevated structures; uncomfortable positions, difficulty accessing work areas, constant vigilance.
Dust and mud The environment itself: heavy air, unstable ground, conditions that make every movement more taxing.
Tools and pneumatic equipment The equipment used: heavy tools, pneumatic machinery; carrying loads, vibrations, prolonged exertion.

The progression of this list. It describes three different sources of physical strain: body posture, the environment in which the worker operates, and the equipment they handle.

Taken together, they cover the essentials of what makes work physically demanding on a construction site or mining site.

The list is open-ended: it ends with an ellipsis. Other forms of physical strain may therefore fall within its scope even if not explicitly listed.

4. The Amount

The amount is 20% of the base salary for the category.

Two points should be noted regarding this formula.

4.1 A High Rate

20% of the base salary is a substantial rate. It places this bonus among the most significant allowances in the series. One-fifth of the base salary is added to the compensation.

This level is understandable given its purpose: physical hardship is not a one-time strain. It is experienced every day, and it takes a toll on those who endure it.

4.2 A Collective, Not Individual, Basis

The text does not say “the worker’s base salary,” but rather “the base salary of the category.”

The basis used What this results in
The base wage for the category All employees in the same category receive the same amount, regardless of their individual wages

What this choice implies. The level of hardship does not depend on an individual’s pay: two workers exposed to the same conditions experience the same level of hardship. It would be inconsistent for the higher-paid worker to receive greater compensation for the same level of hardship.

By focusing on the category rather than the individual, the text links compensation to exposure rather than to salary level.

5. The scheme: a special case

Exempt from ITS and subject to contributions.

This is the distinctive feature of this bonus, and it deserves to be clearly understood: the two systems differ.

Deduction Salary
ITS: Tax on Wages and Salaries Exempt
Social Security Contributions Subject

Do not confuse the two concepts. A tax exemption does not imply an exemption from social security contributions. In this case, the bonus is tax-exempt but is included in the contribution base.

The implication for the employer: this bonus is subject to employer contributions. The assumption that “since it’s tax-exempt, there are no associated costs” would be incorrect and could prove costly at tax filing time.

The implication for the employee: the bonus does not increase their taxable income, but it is included in the base used to calculate their social benefits.

Key Points in 6 Items

  1. The bonus is granted to employees working in the field who are subject to physically demanding conditions: both conditions must be met.
  2. It was established by Decree No. 99-0892/MF-SG of May 18, 1999.
  3. The arduous conditions referred to include depth and height, dust and mud, tools, and pneumatic equipment: this is an open-ended list.
  4. The amount is 20% of the base salary for the category: a collective, not individual, basis.
  5. It is exempt from social security contributions.
  6. However, it is subject to social security contributions. A tax exemption is not the same as a social security exemption.