Unpaid Leave Singapore 2026: Salary Deduction Math, MOM Rules & CPF Impact

Unpaid leave can wreck a budget if you don't see it coming. The salary deduction is mechanical, but the secondary effects — reduced CPF, prorated bonus, possible insurance impacts — often add up to 1.5× the direct deduction.

Use the Annual Leave Calculator to compare paid vs unpaid leave scenarios.

The standard salary deduction formula

Deduction = (Days of UPL ÷ Working days in the month) × Monthly basic salary

"Working days" typically means the actual number of contracted working days in that month (usually 21–22 for 5-day work weeks).

Example 1: 3 days UPL in a 22-working-day month, S$4,400 basic salary.

• Daily rate = S$4,400 / 22 = S$200
• Deduction = 3 × S$200 = S$600

Example 2: 5 days UPL in a 21-working-day month, S$6,000 basic salary.

• Daily rate = S$6,000 / 21 = S$285.71
• Deduction = 5 × S$285.71 = S$1,428.57

The deduction usually appears as a single negative line on your payslip: "UPL — 3 days — (S$600)".

Working day vs calendar day

The formula uses working days, not calendar days. So a public holiday during your UPL period doesn't count against you:

• 5 days UPL spanning a public holiday Monday: typically counted as 4 working days deducted
• 5 days UPL with no public holidays: 5 working days deducted

Some employers include weekends as "covered" if your UPL is a continuous stretch. Most don't — UPL is deducted only for working days.

What counts as "basic salary"?

The Employment Act defines basic salary as your contractual monthly wage excluding:

• Variable bonuses
• Commission (unless contracted as base)
• Allowances (transport, telephone, meal)
• Overtime pay
• Annual Wage Supplement (13th month)
• Productivity / profit-sharing payments

So the deduction is on a smaller base than your "all-in" monthly take-home. This usually works in the employee's favour vs a deduction off gross pay.

Worked example with CPF impact

Employee: S$4,400 basic + S$300 transport allowance. Monthly gross = S$4,700.

Without UPL:

• Salary: S$4,700
• Employee CPF (20%, age <55): S$880 of S$4,400 basic = S$880 (transport allowance not subject to CPF)
• Net take-home: S$4,700 − S$880 = S$3,820

With 3 days UPL in 22-day month:

• Salary: S$4,700 − S$600 = S$4,100
• Employee CPF: 20% × (S$4,400 − S$600) = 20% × S$3,800 = S$760
• Net take-home: S$4,100 − S$760 = S$3,340

Cost of UPL:

• Direct salary deduction: S$600
• Lost CPF contribution: S$120 (employee + employer combined: S$120 less in OA/SA/MA)
• Total impact: S$720

So UPL costs about 20% more than the direct deduction looks because of CPF effects.

When is UPL used?

Voluntary UPL by employee:

• Personal travel beyond annual leave allotment
• Family emergencies (when sick leave/childcare leave exhausted)
• Sabbatical / personal development
• Caregiving responsibilities

By employer with employee consent:

• Project gaps (e.g. between client engagements in consulting)
• Cost reduction during business slowdowns (negotiated)
• Stand-down during operational disruptions

Not allowed by MOM:

• Forced UPL without written consent
• UPL as a substitute for paid sick leave
• UPL during a period covered by paid maternity / paternity / childcare leave

CPF impact in detail

CPF contributions are computed on wages actually paid in that month. So when UPL reduces your wages:

• Employee CPF: 20% of (basic salary minus UPL deduction), age <55
• Employer CPF: 17% of (basic salary minus UPL deduction), age <55
• Lower wages = lower CPF inflows for that month

For higher-rate age bands, the CPF impact is smaller in dollar terms but the same percentage:

• 55–60: employee 13%, employer 13%
• 60–65: employee 8.5%, employer 8.5%
• 65–70: employee 7.5%, employer 7.5%

Bonus and AWS impact

Most employers prorate annual bonuses by months actually worked. Common formulas:

Performance bonus prorated:

• Full bonus × (Months worked / 12)
• "Months worked" = calendar months minus full UPL months
• A 1-month UPL stretch loses 1/12 of the bonus

Annual Wage Supplement (AWS / 13th-month):

• Many contracts treat AWS as 1 month's basic salary
• 1 month UPL = pro-ration of AWS by months actually worked
• Example: 1 month UPL out of 12 → AWS becomes 11/12 × 1 month salary

Sales commission:

• Commission is typically tied to closed sales, so UPL months naturally have lower commission unless deals were already closed
• Some structures pay commission in arrears for sales closed pre-UPL

What about employer benefits during UPL?

Medical insurance (corporate group plan):

• Usually continues during UPL (premiums are annual, not monthly)
• Some employers require employee to pay for the UPL portion of premiums

Health Screening / TCM / Dental benefits:

• Annual entitlements typically continue
• May be pro-rated if your contract treats them as accrued benefits

Pension contributions (CPF):

• Stop during UPL (no salary = no CPF)
• This is the biggest indirect cost

Annual leave entitlement:

• AL is typically calculated on calendar months of service
• Some employers count UPL months as full service for AL accrual; others pro-rate
• Check your contract

Strategies to minimise UPL impact

1. Use AL first. If you have annual leave, exhaust it before applying for UPL.

2. Time UPL across the year-end. UPL in December affects only that year's bonus calculation; UPL in November might affect the same year's bonus and the next year's "months of service" review.

3. Stack UPL with public holidays. UPL just before / after a public holiday extends your effective time off without using additional UPL days.

4. Negotiate. Ask if the employer would treat the UPL as paid (e.g., for a unique project gap) or allow you to use accrued AL even in advance.

5. Voluntary unpaid time off vs UPL. Some employers offer "voluntary unpaid time off" with continued benefits — different mechanism, sometimes better than UPL.

Common UPL mistakes

• Forgetting CPF impact. The hidden cost is the lost CPF inflow.
• Assuming UPL counts as service for AL accrual. Most contracts pro-rate.
• Applying for UPL without written approval. Without HR's signed approval, the deduction terms are ambiguous.
• Using UPL when paid leave (sick / childcare / parental) is available. Always exhaust paid leave first.
• UPL across a salary review period. A salary review based on "months of full service" might be deferred or smaller after UPL.

Related calculators and articles

• Annual Leave Calculator
• Salary Calculator
• Notice Period Calculator
• Take-Home Pay After CPF Guide
• Annual Leave Singapore 2026

For the MOM page on no-pay leave, see mom.gov.sg/employment-practices/leave/no-pay-leave.