Incomplete Month Salary Calculator (2026)
Pro-rate your salary when joining or leaving a job mid-month.
What is the Incomplete Month Salary Calculator?
The Incomplete Month Salary Calculator pro-rates your salary when you join or leave a job mid-month in Singapore. It supports both working days and calendar days methods as recommended by the Ministry of Manpower (MOM), and shows the corresponding CPF deduction on your pro-rated pay.
infoPro-rates salary based on actual days worked in the month
Enter your salary and days worked to calculate pro-rated pay
Pro-Rated
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Daily Rate
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Quick Reference
- • Working days method: Monthly Salary / Total Working Days x Days Worked
- • Calendar days method: Monthly Salary / Calendar Days x Days Employed
- • CPF contributions are computed on the pro-rated salary amount
- • CPF OW ceiling of $8,000/month still applies to pro-rated wages
How Incomplete Month Salary Works
When you do not work the full calendar month, your employer will pro-rate your salary based on either the number of working days or calendar days in the month.
The most common method uses working days: divide your monthly salary by the total working days in the month, then multiply by the number of days you actually worked.
Your CPF contributions will be calculated on the pro-rated salary amount. If you are joining mid-month, your first payslip will reflect the reduced amount along with the corresponding CPF deduction.
Pro-Rating Methods
Working Days Method
Monthly Salary / Working Days x Days Worked
Most common. Excludes weekends and public holidays from total days.
Calendar Days Method
Monthly Salary / Calendar Days x Days Employed
Uses total calendar days in the month as the denominator.
Example
$5,000 salary, 22 working days, 10 days worked = $2,272.73
Frequently Asked Questions
How does incomplete month salary pro-rating work in Singapore?expand_more
When you work an incomplete month (e.g. joining or leaving mid-month), your salary is pro-rated based on the number of calendar or working days. The most common formula is: Monthly Salary / Total Working Days in Month x Number of Days Worked. Some employers use calendar days instead of working days.
What is the formula for calculating incomplete month salary?expand_more
The standard formula is: Pro-rated Salary = Monthly Salary / Total Working Days in the Month x Actual Days Worked. For example, if your monthly salary is $5,000, there are 22 working days, and you worked 10 days, your pro-rated salary is $5,000 / 22 x 10 = $2,272.73.
When does incomplete month salary apply?expand_more
Incomplete month salary applies when you start a new job mid-month, resign or are terminated before month-end, take unpaid leave for part of the month, or transition between contracts within the same month. Your employment contract should specify the pro-rating method used.
Are CPF contributions affected by incomplete month salary?expand_more
Yes. CPF contributions are calculated based on your actual wages for the month, including pro-rated salary. Both employee and employer CPF contributions are computed on the pro-rated amount, subject to the ordinary wage ceiling of $8,000 per month.
Sources
- • Ministry of Manpower (mom.gov.sg) — Salary pro-rating guidelines and Employment Act provisions
- • CPF Board (cpf.gov.sg) — CPF contribution calculations on pro-rated wages