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Prorated Salary and Hourly Rate Calculator for Singapore
This calculator helps employers and employees in Singapore determine two key figures: the prorated salary for an incomplete month of work and the standard hourly rate derived from a monthly salary. The calculations follow the formulas recommended by the Ministry of Manpower (MOM) under the Employment Act.
How Salary Proration Works in Singapore
When an employee starts or leaves a job partway through a month, they are entitled to a salary proportional to the number of days they worked. According to MOM guidelines, the salary is prorated based on working days, not calendar days. The standard formula involves first calculating a daily rate.
Daily Rate Formula: (Monthly Gross Salary × 12) / (52 × Working Days per Week).
This formula annualizes the monthly salary, then divides it by the total number of working days in a year (52 weeks multiplied by the employee's working days per week).
Prorated Salary Formula: Daily Rate × Number of Days Worked in the Month.
How the Hourly Rate is Calculated
For part-time employees or to understand the breakdown of a monthly salary, the hourly rate is calculated similarly.
Hourly Rate Formula: (Monthly Gross Salary × 12) / (52 × Working Hours per Week).
This gives the basic hourly rate before overtime. For employees covered by the Employment Act working less than 35 hours a week, different overtime rates may apply.
Step-by-Step Example
Let's calculate the prorated salary for an employee with a $4,000 SGD monthly salary, working 5 days a week, 44 hours a week, who worked 11 days in a month.
- Daily Rate: ($4,000 × 12) / (52 × 5) = $48,000 / 260 = $184.62 per day.
- Prorated Salary: $184.62 × 11 days worked = $2,030.82.
The employee would be entitled to $2,030.82 SGD for that partial month.
Common Use Cases
- Onboarding Mid-Month: Calculating salary for a new employee who starts after the first day of the month.
- Early Termination: Determining final pay for an employee who leaves before the month ends.
- Part-Time Employment: Establishing the hourly rate for a part-time contract based on an agreed equivalent monthly salary.
- Contract Review: Verifying that the hourly or daily rates mentioned in a contract align with the monthly salary.
Important Considerations
The MOM formulas are standard for employees covered by the Employment Act. For those earning above the salary thresholds, the contract may specify alternative calculation methods. This calculator does not account for overtime, rest day pay, or other allowances, which must be computed separately.
Next Steps: Formalize the Agreement
After calculating the rates, it's crucial to document them properly. For a new full-time or part-time employee, use an Employment Contract or Part-Time Employment Contract to clearly state the monthly salary, working days/hours, and the proration method. For termination, an Employer's Letter of Termination should detail the final prorated salary payment. Having these documents in place ensures clarity and legal protection for both parties.