How to calculate pro-rata leave
A complete guide to calculating leave entitlements for part-time employees in Australia. Learn all three formulas, see worked examples, and understand which entitlements are pro-rated.
Written by
Georgia Morgan
This guide provides general information about calculating pro-rata leave entitlements for part-time employees in Australia. It does not constitute legal, HR, or professional advice and should not be relied on as a substitute for advice specific to your business, workforce, or circumstances.
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Key takeaways
- Pro-rata leave gives part-time and short-tenure staff a proportional share of full-time entitlements based on their hours or time worked
- The core formula is (full-time leave hours ÷ full-time hours) × part-time hours, or use the FTE shorthand of full-time entitlement × FTE fraction
- Always track balances in hours rather than days, and round up never down, to avoid underpaying variable-hour employees
- Most NES leave types are pro-rated, but compassionate leave (2 days per occasion) applies in full regardless of hours
What is pro-rata leave?
Pro-rata means "in proportion". For leave entitlements, it means part-time employees and short-tenure staff receive a proportional share of the full-time entitlement based on their hours or time worked. A 0.5 FTE employee (half the full-time hours) receives exactly half the annual leave, personal leave, and long service leave a full-timer earns.
Leave accrual happens progressively throughout the year — not in a lump sum — so pro-rata also applies when an employee hasn't completed a full year. Use annual leave management processes and a leave tracker template to track balances accurately, or automate the whole process with leave management software.
0.5 FTE
= 50% of full-time entitlements
2 weeks
annual leave for a 19 hr/week employee
Hours
always track in hours, not days
Not all leave types are pro-rated. Compassionate leave (2 days per occasion) and community service leave apply in full regardless of hours. See the entitlements table below.
Pro-rata leave formulas
Three methods — use whichever fits your situation. All produce the same result for a standard part-timer.
Formula 1 — hours-based (most common)
Example: (152 hrs ÷ 38 hrs) × 20 hrs = 80 hours annual leave (~2.1 weeks)
Formula 2 — time-based (part-year service)
Example: (6 months ÷ 12) × 4 weeks = 2 weeks annual leave
Formula 3 — FTE shorthand (quickest)
Example: 4 weeks × 0.5 FTE = 2 weeks annual leave
Which leave entitlements are pro-rated?
Most NES leave types are pro-rated for part-time employees. See our full leave entitlements guide for detailed calculations on each type.
| Leave type | Full-time amount | Pro-rata? | Notes |
|---|---|---|---|
| Annual leave | 4 weeks (152 hours / 20 days) | Yes | Based on ordinary hours worked |
| Personal/carer's leave | 10 days (76 hours) | Yes | Accumulates progressively |
| Long service leave | Varies by state (typically 8.67 weeks) | Yes | After qualifying period — see LSL guide |
| Compassionate leave | 2 days per occasion | No | Full entitlement per occasion (hours adjust to shift length) |
| Public holidays | Day off if normally worked | Special rules | Paid if would have worked that day |
Pro-rata leave worked examples
See how the formulas apply across common part-time scenarios.
Annual leave — 0.5 FTE (19 hrs/week)
Hours formula: (152 hrs ÷ 38 hrs) × 19 hrs = 76 hours
FTE shorthand: 4 weeks × 0.5 FTE = 2 weeks
Part-timer working 19 hours/week gets 2 weeks annual leave (76 hours)
Personal/carer's leave — 0.6 FTE (22.8 hrs/week)
Hours formula: (76 hrs ÷ 38 hrs) × 22.8 hrs = 45.6 hours
FTE shorthand: 10 days × 0.6 FTE = 6 days
Part-timer working 22.8 hours/week gets 6 days (45.6 hours)
Annual leave — 0.8 FTE (30.4 hrs/week)
Hours formula: (152 hrs ÷ 38 hrs) × 30.4 hrs = 121.6 hours
FTE shorthand: 4 weeks × 0.8 FTE = 3.2 weeks
Part-timer working 30.4 hours/week gets 3.2 weeks (121.6 hours)
Part-year service — started July 1, leaving December 31
Hours formula: (6 months ÷ 12) × 4 weeks = 2 weeks
FTE shorthand: 0.5 year × 4 weeks = 2 weeks
Full-time employee who worked exactly 6 months of the year
How to calculate pro-rata leave in 6 steps
Follow this process for any part-time employee.
Determine full-time equivalent hours
Identify what constitutes full-time hours for your industry and award.
Tips
- Standard full-time is usually 38 hours per week
- Some awards define full-time as 35 or 40 hours
- Check your specific award for the correct figure
- This is your baseline for all pro-rata calculations
Calculate the employee's ordinary hours
Determine the part-time employee's contracted ordinary hours per week.
Tips
- Use the hours specified in their employment contract
- For variable hours, use the average over a representative period
- Don't include overtime in ordinary hours
- Document the agreed ordinary hours clearly
Calculate the FTE fraction
Divide the employee's hours by full-time hours to get their FTE (Full-Time Equivalent).
Tips
- Formula: Employee hours ÷ Full-time hours = FTE
- Example: 19 hours ÷ 38 hours = 0.5 FTE
- Express as decimal (0.5) or percentage (50%)
- This fraction applies to all pro-rata entitlements
Apply the pro-rata calculation
Multiply the full-time entitlement by the FTE fraction to get the pro-rata entitlement.
Tips
- Annual leave: 4 weeks × FTE = pro-rata weeks
- Personal/carer's leave: 10 days × FTE = pro-rata days
- Can also calculate in hours for precision
- Round up — never down
Convert to hours if needed
For part-timers with variable daily hours, express leave in hours rather than days.
Tips
- A "day" of leave equals their ordinary hours for that day
- Example: 4-hour workday = 4 hours of leave used
- Track balances in hours for accuracy
- Helps when shifts vary in length
Document and track accurately
Maintain accurate records of entitlements, accruals, and usage.
Tips
- Use leave management software for automatic calculations
- Review if hours change (e.g., increased to more hours)
- Provide employees access to their balance
- Recalculate if employment type changes
Common pro-rata leave mistakes to avoid
These errors lead to underpayment, Fair Work complaints, and unhappy employees.
Using the wrong full-time hours baseline
Risk: Miscalculated FTE and incorrect entitlements for all leave types.
Solution: Check your Modern Award — full-time may be 35, 38, or 40 hours depending on your industry.
Rounding down instead of up
Risk: Underpayment — employees are short-changed leave hours.
Solution: Always round up to the nearest half-day or hour. The AI Overview explicitly notes: never round down.
Tracking in days for variable-hour staff
Risk: Inaccurate leave deductions when shifts vary in length.
Solution: Track in hours. A "day" of leave = the hours the employee would have worked that day.
Not recalculating when hours change
Risk: Future accruals are based on outdated hours, creating compliance risk.
Solution: Update the FTE whenever contracted hours are permanently changed.
Applying pro-rata to non-pro-rata entitlements
Risk: Underpaying compassionate leave or mishandling public holiday pay.
Solution: Compassionate leave (2 days per occasion) is not pro-rated by number of days — only by hours in the working day.
Official sources and tools
Use these to verify entitlements and check award-specific rules.
Simplify pro-rata calculations
RosterElf automatically calculates pro-rata leave entitlements for part-time and casual employees. Built for Australian small businesses.
How RosterElf helps with pro-rata leave
Purpose-built tools to make pro-rata leave faster, easier, and compliant for Australian businesses.
Related guides
More resources for leave calculations and payroll compliance.
Automate award compliance
Join thousands of Australian businesses using RosterElf to calculate pay rates and support your compliance efforts. Built for Australian small businesses.
Frequently asked questions
- Multiply the full-time leave entitlement by the employee's FTE fraction: Full-time entitlement × (Employee hours ÷ Full-time hours). For example, a part-timer working 20 of 38 full-time hours has an FTE of 0.526, so 4 weeks × 0.526 = 2.1 weeks annual leave. You can also use the Fair Work PACT Leave Calculator at www.fairwork.gov.au/pay-and-wages/pay-calculator for precise figures based on your award.
- The standard formula is: (Full-time leave entitlement ÷ Full-time hours per week) × Employee's ordinary hours per week = Pro-rata entitlement. For part-year service use: (Months employed ÷ 12) × Annual entitlement. Always track the result in hours for variable-hour employees to avoid rounding errors.
- Annual leave is 4 weeks (152 hours for a 38-hour week) for a full-time employee. For a part-timer: (152 hours ÷ 38 hours) × weekly hours = pro-rata hours. Or simply: 4 weeks × (employee hours ÷ 38). Example: 20 hrs/week → 4 × (20/38) = 2.1 weeks, or (152/38) × 20 = 80 hours of annual leave per year.