Prorated salary inputs
Enter your monthly salary, payroll month and employment period within that month. This calculator uses the MOM incomplete-month framework: monthly gross rate of pay divided by total working days in the month, multiplied by days actually worked in the month.
Your estimated result
Estimated prorated salary
Use this as an estimate for partial month salary. CPF and tax are not deducted in this result.
How this prorated salary calculator works
This calculator estimates salary for an incomplete month. This usually happens when an employee joins mid-month, resigns before the month ends, takes unpaid leave, or has only worked part of the payroll month.
Use the employee’s fixed monthly basic salary before CPF, tax or other deductions.
Select the first and last date that should be paid within the salary month.
Use the working-day formula for an incomplete month of work.
MOM incomplete-month salary formula
For a monthly-rated full-time employee who joins after the first day of the month, leaves before the last day, or otherwise has an incomplete month, MOM uses the monthly gross rate of pay divided by the total number of working days in that month, multiplied by the number of days actually worked.
When do you need prorated salary?
Prorated salary is usually needed when an employee does not work the full salary month. Instead of paying the full monthly salary, payroll calculates only the portion that should be paid.
An employee starts work in the middle of the month and should only receive salary from the start date.
An employee’s last day is before the month end, so final salary is paid up to the last working day.
An employee takes unpaid leave, no-pay leave or has unpaid absence during the month.
Prorated salary examples
These examples show how the calculator can be used for common Singapore payroll situations.
| Scenario | Monthly salary | Example calculation | Estimated salary |
|---|---|---|---|
| New joiner works 12 of 23 working days | S$4,000 | S$4,000 ÷ 23 × 12 | About S$2,086.96 |
| Employee works 15 of 22 working days before leaving | S$4,000 | S$4,000 ÷ 22 × 15 | About S$2,727.27 |
| Employee takes 3 no-pay leave days in a 23-working-day month | S$4,000 | S$4,000 ÷ 23 × 20 | About S$3,478.26 |
MOM incomplete-month salary formula
For monthly-rated full-time employees, MOM provides an incomplete-month formula. Employees and employers should be clear about the payroll method used for partial month salary.
Important notes before using the result
Prorated salary is a payroll estimate. Before relying on the result, check how your company calculates partial month salary and whether any other pay components should be included.
| Item | What to check |
|---|---|
| Basic salary | Confirm whether the calculation should use basic salary only or gross monthly salary. |
| Allowances | Some allowances may be prorated, while others may not be payable for partial months. |
| CPF | CPF is not deducted in this calculator. CPF may apply separately based on actual wages paid. |
| Overtime | Overtime pay should usually be calculated separately from prorated basic salary. |
| Public holidays | This calculator does not remove Singapore public holidays from working days automatically. |
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View All Guides →Frequently Asked Questions
What is prorated salary?
Prorated salary is a partial salary amount paid when an employee does not work the full salary month. It is commonly used for new joiners, resigning employees, unpaid leave or incomplete month payroll.
How do I calculate prorated salary in Singapore?
For a monthly-rated full-time employee, use the MOM incomplete-month formula: monthly gross rate divided by total working days in the month, multiplied by days actually worked.
Should prorated salary be based on calendar days or working days?
For the statutory incomplete-month calculation for a monthly-rated full-time employee, MOM uses working days in the relevant month rather than an arbitrary calendar-day or fixed 26-day divisor.
Is CPF deducted from prorated salary?
This calculator does not deduct CPF. In practice, CPF is generally calculated separately based on the actual wages paid and the employee’s CPF eligibility.
How is salary calculated if I resign mid-month?
Your final month salary is usually calculated up to your last day of employment, then adjusted for any unpaid leave, deductions, CPF, allowances or other payroll items.
How is salary calculated if I join mid-month?
Your first month salary is usually prorated from your start date to the end of the salary month, based on the company’s payroll formula.
Does this calculator include public holidays?
For calendar day basis, public holidays are naturally included because all calendar days are counted. For working day basis, this calculator counts Monday to Friday only and does not separately remove Singapore public holidays.
Can unpaid leave be deducted using the 26-day formula?
A fixed 26-day shortcut should not replace the MOM incomplete-month formula for a monthly-rated full-time employee. check the current MOM guidance and the employee’s actual work schedule for the statutory calculation.
Is this prorated salary calculator official?
No. SG Salary Tools provides general planning calculators only. For exact payroll treatment, check your employment contract, HR policy or seek professional advice.