Overtime Pay (MOM) Formula Explained, With Examples
Every overtime pay (mom) result comes from one formula. Once you understand what goes into it, you can sanity-check any figure you are given, whether by an employer, a bank, a teacher or another website.
The formula
Hourly basic rate = (12 × monthly basic salary) ÷ (52 × 44). Overtime pay = 1.5 × hourly rate × overtime hours.
What each input means
- Monthly basic salary (S$): the value you enter in the calculator.
- Overtime hours worked: the value you enter in the calculator.
Example
For example, with these inputs:
- Monthly basic salary (S$): 2,400
- Overtime hours worked: 20
the calculator returns:
- Hourly basic rate: S$12.59
- Overtime rate (1.5×): S$18.88
- Overtime pay: S$377.62
How the result changes
The table keeps the other inputs at their example values and changes monthly basic salary (s$).
| Monthly basic salary (S$) | Hourly basic rate | Overtime rate (1.5×) | Overtime pay |
|---|---|---|---|
| 2,400 | S$12.59 | S$18.88 | S$377.62 |
| 1,200 | S$6.29 | S$9.44 | S$188.81 |
| 1,800 | S$9.44 | S$14.16 | S$283.22 |
| 3,000 | S$15.73 | S$23.60 | S$472.03 |
| 3,600 | S$18.88 | S$28.32 | S$566.43 |
Why it matters
In Singapore, payslip maths decides how much you can save, invest and spend, and CPF takes a sizeable share before the money reaches your bank account. Knowing the numbers in advance makes salary negotiations, job switches and budgeting far less of a guess.
The Central Provident Fund is Singapore's mandatory savings scheme for citizens and permanent residents. Contributions are shared between employee and employer and flow into the Ordinary Account for housing, education and investment, the Special Account for retirement, and MediSave for healthcare. Because the money is locked up for specific purposes, many people underestimate how much of their total pay it represents.
The Employment Act sets out how hourly and daily rates are calculated for overtime, public holiday work and salary deductions. These formulas use the monthly basic rate of pay rather than gross salary, which is why the numbers can look lower than a simple division of your salary by hours worked.
CPF distinguishes between ordinary wages, which are paid for work in the month such as basic salary and fixed allowances, and additional wages, such as annual bonuses and leave encashment. Ordinary wages are capped at S$8,000 a month from January 2026, while additional wages are capped by an annual ceiling of S$102,000 minus the ordinary wages already subject to CPF in the year.
Related calculations
- Salary Increment Calculator: Shows the new salary after a percentage raise and how much more you earn per year.
- Pro-Rated Annual Leave Calculator: Calculates leave earned for part of a year.
- Salary Converter (Annual, Monthly, Hourly): Converts an annual package into monthly, weekly, daily and hourly figures.
- CPF OA Interest Calculator: Projects your CPF Ordinary Account balance with the 2.5% floor rate and regular contributions.
Use the Overtime Pay Calculator (MOM) to plug in your own numbers.
Run your own numbers: Overtime Pay Calculator (MOM)