Part-Time Leave Calculator
The Part-Time Leave Calculator helps employers and employees accurately calculate annual leave entitlement for part-time working arrangements. Whether you work fixed days, compressed hours, or term-time only, this tool provides precise pro-rata calculations. Part-time workers are entitled to the same benefits as full-time colleagues on a pro-rata basis. This means your holiday entitlement is proportional to the hours or days you work compared to a full-time employee. This calculator handles various part-time patterns including fixed days per week, hourly contracts, compressed hours, and annualized hours arrangements. It provides both days and hours-based entitlements for flexibility.
leave
Category
beginner
Difficulty
2 minutes
Time needed
2025-01-15
Last reviewed
Why use this calculator
Accurate pro-rata calculations for any working pattern
Calculate pro-rata annual leave entitlement for part-time workers based on their working pattern.
Supports days-based and hours-based contracts
Calculate pro-rata annual leave entitlement for part-time workers based on their working pattern.
Handles compressed hours and irregular schedules
Calculate pro-rata annual leave entitlement for part-time workers based on their working pattern.
Shows entitlement in both days and hours
Calculate pro-rata annual leave entitlement for part-time workers based on their working pattern.
Compares to full-time equivalent for transparency
Calculate pro-rata annual leave entitlement for part-time workers based on their working pattern.
Inputs and outputs
Inputs
How do you want to calculate?: radio - Choose the calculation method that matches your contract
Days worked per week: number - Number of days you work each week
Hours worked per week: number - Your contracted weekly hours
FTE Percentage: number - Your full-time equivalent percentage
Full-time days per week: number - Days in a full-time week at your organization
Full-time hours per week: number - Hours in a full-time week at your organization
Full-time annual leave entitlement: number - Days of annual leave for full-time staff
Does the entitlement include bank holidays?: radio
Outputs
Your Pro-Rata Entitlement: days - Your annual leave entitlement in days
Entitlement in Hours: hours - Your entitlement converted to hours
FTE Percentage: percentage - Your full-time equivalent percentage
Pro-Rata Bank Holidays: days - Your pro-rata bank holiday entitlement
Compared to Full-Time: text - How your entitlement compares to full-time
Methodology
Calculation method
Pro-rata entitlement is calculated by multiplying the full-time entitlement by the FTE percentage. FTE% = (Part-time hours ÷ Full-time hours) × 100.
Formula: Pro-Rata Days = Full-Time Days × (Part-Time Hours ÷ Full-Time Hours)
How it works
Select your calculation method (days, hours, or percentage)
Enter your part-time working pattern
Confirm full-time equivalents for your organization
Enter the full-time leave entitlement
Review your pro-rata calculation
Compliance note
This calculator provides general pro-rata calculations. Your actual entitlement may differ based on your employment contract, company policy, or collective agreements. Always verify with your HR department.
Legal basis: Part-Time Workers Regulations 2000 (UK), pro-rata principle
Example scenarios
3 Days Per Week
Part-time employee working Monday to Wednesday
Why it matters: Working 3 days out of 5 = 60% FTE, so 28 × 0.6 = 16.8 days entitlement.
24 Hours Per Week
Part-time employee working 24 hours
Why it matters: 24 hours out of 40 = 60% FTE, so 25 × 0.6 = 15 days (or 72 hours).
80% FTE Contract
Employee on an 80% contract
Why it matters: Direct calculation: 28 × 0.8 = 22.4 days, with 6.4 bank holidays included.
Frequently asked questions
How do I calculate pro-rata annual leave?
Divide your weekly hours by full-time hours to get your FTE percentage, then multiply the full-time leave entitlement by this percentage. For example, 24 hours ÷ 40 hours = 60%, so 60% of 28 days = 16.8 days.
Do part-time workers get the same benefits as full-time?
Part-time workers are entitled to the same benefits as full-time colleagues on a pro-rata (proportional) basis. This includes annual leave, sick pay, and other contractual benefits.
How are bank holidays calculated for part-time staff?
Bank holidays are also pro-rated. If full-time staff receive 8 bank holidays and you work 60% FTE, you receive 4.8 days (which may be rounded up to 5 by your employer).
Should leave be tracked in days or hours?
For part-time workers with variable day lengths, tracking in hours is often more accurate. This ensures fair treatment when taking leave on longer vs shorter days.
What if I work different hours each day?
Calculate your weekly hours average, then use the hours-based calculation. When booking leave, track it in hours to ensure accuracy across different day lengths.
Can my employer round down my leave entitlement?
Rounding should be fair and consistent. Most employers round to the nearest half-day or allow hours tracking. Systematic rounding down could breach pro-rata requirements.
Related calculators
UK Annual Leave Calculator
Calculate your UK statutory annual leave entitlement based on the Working Time Regulations 1998.
Pro-Rata Leave Calculator
Calculate pro-rata annual leave for employees who start or leave mid-year.
Working Days Calculator
Calculate the number of working days between two dates, excluding weekends and holidays.