Singapore Working Days Calculator
Count working days between two dates, deduct Singapore public holidays, and work out MOM pay for an incomplete month.
First day counted (inclusive). For pay, this is your first day of work.
Last day counted (inclusive). For pay, this is your last day of work.
Fill this in to see pay for an incomplete month. Use the gross rate of pay: basic plus fixed allowances, without overtime or bonuses.
Working days
Pay for an incomplete month (MOM method)
Monthly gross ÷ total working days in the month × days worked. Both counts include public holidays, so none is deducted here.
| Month | Working days in month | Days worked | Pay |
|---|---|---|---|
| 2026-11 | 21 | 16 | S$3,657.14 |
| Total pay | S$3,657.14 | ||
In-depth guide
Working days and part-month pay in Singapore
How working days are counted with Singapore public holidays, and how MOM's formula pays an incomplete month when you join, leave, take no-pay leave or serve reservist training.
Key figures at a glance
- Incomplete-month pay
- Monthly gross ÷ total working days in the month × days worked
- For monthly-rated full-time employees. Both counts include public holidays on a working day.
- Source: MOM
- Gazetted public holidays a year
- 11
- Plus a Monday in lieu when a holiday falls on your Sunday rest day.
- Source: MOM
- Default rest day
- Sunday
- A 5.5-day week counts each Saturday as half a day and a 6-day week as a full day.
- Source: MOM
Paying a part month: step by step
Use this when someone joins or leaves mid-month, takes no-pay leave or does reservist training.
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Step 1: Confirm it is an incomplete month
FirstIt applies when the employee starts after the 1st, leaves before the last day, takes no-pay leave or is on reservist training in that month.
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Step 2: Count the total working days in the month
Count the scheduled work days under the employee's work week. Rest days and non-working days are out; public holidays that fall on a working day stay in.
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Step 3: Count the days actually worked
Count the scheduled days from the first to the last day of work. Public holidays, paid hospitalisation leave and annual leave the employee is entitled to count as worked; no-pay days do not.
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Step 4: Apply the formula
Monthly gross rate of pay ÷ total working days in the month × days worked. Use the gross rate: basic pay plus fixed allowances, without overtime, bonuses or reimbursements.
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Step 5: Work out CPF and take-home pay
After the pay is fixedUse the part-month figure as the month's wages when you work out CPF contributions and take-home pay.
Two different counts
The calculator gives two numbers from the same dates, and they are not meant to match.
| Public holidays | Used for | |
|---|---|---|
| Working days between two dates | Deducted (if you tick the box) | Project timelines, notice periods, leave planning |
| Total working days and days worked in the MOM formula | Included | Pay for an incomplete month |
MOM includes public holidays in both parts of the pay formula because the employee is paid for them. Deducting them from the denominator would overpay; deducting them from only the days worked would underpay.
Worked examples
| Case | Working days in month | Days worked | Pay at S$4,800 |
|---|---|---|---|
| Joins Thu 15 Oct 2026 | 22 | 12 | S$2,618.18 |
| Joins Mon 9 Nov 2026 (Deepavali in lieu) | 21 | 16 | S$3,657.14 |
In the second case the Monday is a public holiday. It counts as a day worked for pay, but a "working days between 9 and 30 Nov" count with the deduction on is 15, not 16.
Public holidays on weekends
A holiday that falls on a Sunday is moved to the Monday only if Sunday is your rest day. The calculator uses the Monday in-lieu dates from the public holidays list. A holiday on a Saturday is deducted only if Saturday is a working day in your week (half a day on a 5.5-day week).
Common mistakes
- Dividing by 30 or by calendar days. MOM's formula uses working days.
- Deducting public holidays from the working days in the formula.
- Using basic pay when allowances are fixed and part of the gross rate of pay.
- Forgetting that the 5.5-day and 6-day weeks have more working days per month than the default.
Related tools
Use the annual leave calculator for leave entitlement, the notice period calculator for the last day of work, and the overtime pay calculator for overtime, which is outside the gross rate used here.
Frequently asked questions
How does MOM calculate salary for an incomplete month?
Monthly gross rate of pay divided by the total working days in that month, multiplied by the days actually worked.
Are public holidays counted as working days for incomplete-month pay?
Yes. MOM includes public holidays that fall on a working day in both the total working days and the days worked.
Does this calculator deduct public holidays?
Only for the working-day count, and only when the box is ticked. The pay calculation never deducts them, following MOM.
What happens when a public holiday falls on a Sunday?
The next Monday is a public holiday in lieu, and it is deducted like any other holiday.
Which years have public holidays built in?
2026 and 2027, as gazetted by MOM. Other years are counted without holiday deduction.
How is a 5.5-day week counted?
Monday to Friday count 1 each and every Saturday counts 0.5, as in MOM’s working-days table.
Is the start date counted?
Yes. Both the start date and the end date are included.
How do I handle no-pay leave?
Reduce the days worked by the unpaid working days in that month, then apply the same formula.
Does the monthly salary include allowances?
Use the gross rate of pay: basic salary plus fixed allowances, without overtime, bonuses or reimbursements.
Are my dates or salary stored?
No. Everything is calculated in your browser.
Sources
- MOM — Monthly and daily salary — Definition of incomplete month, the formula and what counts as worked.
- MOM — Calculate pay for incomplete month — How working days per month are counted for 5, 5.5 and 6-day weeks.
- MOM — Public holidays — Dates, and the Monday in lieu when a holiday falls on a Sunday rest day.
This guide explains published rules in plain language. It is not financial, legal or official advice — rules change, so confirm with the agency linked above before you commit.