Cambodian Labor Law: Calculating Overtime Multipliers, Grace Periods & NSSF Contributions

1. Navigating Cambodian Payroll Compliance in 2026

Under regulatory guidelines established by Cambodia's Ministry of Labour and Vocational Training (MoLVT) and the General Department of Taxation (GDT), calculating payroll requires strict adherence to statutory formulas. Failing to comply can expose business owners to MoLVT labor inspection fines, retroactive tax assessments, and costly union arbitration disputes.

Deploying an automated system like the AttendKH Automated Cambodian Payroll Engine ensures your calculations adhere directly to Cambodian statutory standards.

2. Determining the Statutory Hourly Wage Rate

Standard full-time employment under Article 139 of the Cambodian Labour Law is benchmarked against either fixed contractual working days (typically 26 days/month) or actual calendar working days:

📐 Hourly Base Rate = Monthly Gross Base Salary / (Contractual Working Days × 8 Hours)

Example: For an administrative staff earning $300.00 / month on a standard 26-day contract:

📐 Base Hourly Rate = $300.00 / (26 × 8) = $1.442 / hour

3. Statutory Overtime Multipliers (MoLVT Standards)

Cambodian law strictly differentiates overtime rates based on shift timing and public holiday schedules:

• Regular Working Days (Day Shift): Overtime performed beyond standard 8-hour shift limits is compensated at 1.5× the hourly base rate. Note that Article 139 caps daily overtime at a maximum of 2 hours/day.
• Night Shifts (22:00 – 06:00): Overtime performed during nocturnal hours attracts a 2.0× multiplier as stipulated by MoLVT Prakas.
• Weekly Rest Days & Official Public Holidays: Remunerated at 2.0× (Double Pay / 200%) the standard hourly rate. Consult our companion Cambodian Public Holidays and Paid Leave Guide.

4. Grace Periods vs. Late Deduction Algorithms

Many Cambodian employers adopt a standard 15-minute grace window before applying attendance penalties. In AttendKH, HR directors can configure whether late penalties apply:

• Per-minute deduction: Exact minute-by-minute wage deduction calculated immediately once the grace window expires.
• Tiered deduction brackets: Configurable tranches (e.g., 16–30 min late = 30 min wage deduction).

📐 Late Deduction Amount = (Late Minutes - Grace Minutes) × (Hourly Base Rate / 60) × Penalty Factor

Attendance punches capture automatically through the AttendKH GPS & Selfie Clock-in App, feeding clean, dispute-free timestamps into the payroll ledger.

5. NSSF (National Social Security Fund) Calculations

AttendKH automatically computes statutory deductions across all three mandatory National Social Security Fund (NSSF) branches:

1. Occupational Risk Scheme (0.8%): Paid 100% by the employer, calculated against the capped statutory ceiling of 1,200,000 KHR (~$300 USD) (maximum employer payment: 9,600 KHR / ~$2.40 USD per employee).
2. Health Care Scheme (2.6%): Paid 100% by the employer, capped at the 1,200,000 KHR statutory ceiling (maximum employer payment: 31,200 KHR / ~$7.80 USD per employee).
3. Pension Scheme (4.0%): Shared equally between employer (2.0%) and employee (2.0%), with employee deductions automatically capped at 24,000 KHR (~$6.00 USD) per month.

For detailed tax rules, explore our Cambodia Tax on Salary (ToS) Brackets & GDT Handbook and our guide on Calculating Biannual Seniority Indemnity Pay.

6. Dual-Currency (USD & KHR) Payslips & Bakong Payouts

Because Cambodian businesses benchmark corporate salaries in US Dollars ($) while NSSF and tax compliance run in Khmer Riel (៛), AttendKH generates bilingual Khmer/English PDF payslips displaying exact conversion rates based on the official National Bank of Cambodia (NBC) daily exchange rate.

Once approved, HR managers can execute one-click bulk salary disbursals to all commercial banks via Bakong KHQR Direct Salary Disbursals.

Ready to automate your Cambodian payroll compliance? See our All-in-One $1/employee/month pricing, download the mobile app, or schedule a free demo with our local Phnom Penh team.