Pro Rata Holiday Calculator
Calculate your holiday entitlement for part-time work
About This Tool
The Pro Rata Holiday Calculator helps part-time workers in the UK calculate their annual leave entitlement. Under UK law, all workers are entitled to paid holiday, and part-time workers receive this on a pro rata basis.
In the UK, full-time workers are entitled to a minimum of 5.6 weeks paid holiday per year (28 days for someone working 5 days a week). This calculator helps you work out exactly how many days you're entitled to based on your working pattern.
How It Works
How to Use This Calculator
- Enter days worked per week - How many days do you work each week? This could be 1-5 days.
- Enter full-time entitlement - The annual leave allowance for full-time staff at your company. The UK minimum is 28 days (including bank holidays).
- Choose bank holiday handling - Select whether bank holidays are included in your entitlement or given separately.
- Click Calculate - See your pro rata holiday entitlement instantly.
The result shows your annual leave in days, which you can then book throughout the year.
Formula
Holiday Entitlement Formula
For part-time workers, the formula is:
Pro Rata Holiday = Full-Time Entitlement x (Days Worked / Full-Time Days)
Or using hours:
Pro Rata Holiday = Full-Time Entitlement x (Your Hours / Full-Time Hours)
The statutory minimum is 5.6 weeks, regardless of working pattern.
Examples
Examples
Example 1: 3 Days Per Week
- Full-time entitlement: 28 days
- Days worked: 3 days/week
- Pro Rata Holiday = 28 x (3 / 5) = 16.8 days
Example 2: 4 Days Per Week
- Full-time entitlement: 25 days + 8 bank holidays = 33 days
- Days worked: 4 days/week
- Pro Rata Holiday = 33 x (4 / 5) = 26.4 days
Example 3: Variable Hours
- Full-time hours: 37.5 hours/week
- Your hours: 20 hours/week
- Full-time entitlement: 28 days
- Pro Rata Holiday = 28 x (20 / 37.5) = 14.9 days
Frequently Asked Questions
How do I calculate pro rata holiday entitlement?
Pro rata holiday = Full Annual Entitlement × (Months Worked / 12). If full entitlement is 28 days and you start in April (9 months remaining): 28 × (9/12) = 21 days. The calculator rounds to the nearest half day.
How is pro rata holiday calculated for part-time workers?
Multiply the full-time entitlement by the fraction of hours worked. A part-time worker doing 3 days per week: 28 × (3/5) = 16.8 days. In the UK, the statutory minimum for part-time is calculated in hours to ensure fairness.
Does bank holiday entitlement change for part-time workers?
In the UK, part-time workers get a pro rata share of bank holidays. Full-time gets 8 bank holidays. A 3-day-per-week worker gets 8 × (3/5) = 4.8 bank holiday days, regardless of which days they fall on.
What happens to unused pro rata holiday when I leave?
You are entitled to payment for accrued but unused holiday. If you have taken more than your pro rata entitlement, your employer may deduct the excess from your final pay, depending on your contract terms.
How do I calculate holiday for someone who starts mid-month?
Use the exact number of remaining calendar days divided by 365. Starting on March 15: remaining days = 292. Pro rata = 28 × (292/365) = 22.4 days. The calculator handles exact date calculations automatically.
Disclaimer
Disclaimer: This calculator provides estimates based on the information you enter and is intended for general guidance only. It does not constitute professional employment or financial advice. For specific queries about your employment rights, holiday entitlement, or contractual terms, please consult your employer, HR department, or contact ACAS (Advisory, Conciliation and Arbitration Service) for free, impartial advice. Employment law and regulations may change; always verify current rates and rules with official sources.
💡 Tips
Tips
- Bank holidays - Part-time workers get bank holidays pro rata, not automatically
- Carry over - Check if unused leave can be carried to next year
- Accrual - Holiday accrues throughout the year; you don't get it all on day one
- Leaving employment - You're entitled to pay for accrued but untaken holiday
- Round up - Employers often round up to the nearest half or whole day