Calculating annual leave correctly is one of the most frequent compliance challenges for Australian employers. The Fair Work Act specifies precise rules for accrual, part-time pro-rata entitlements, shift worker calculations, and termination payouts — and wage theft laws introduced in 2025 mean intentional underpayment is now a criminal offence carrying fines up to $1.65 million for individuals.
This guide provides the formulas, worked examples, and interactive calculator tables you need to get annual leave calculations right every time.
Key Takeaways
- Full-time employees accrue 4 weeks (152 hours) of annual leave per year, progressive from day one
- Part-time employees receive 4 weeks on a pro-rata basis calculated from their ordinary hours
- Shift workers under certain Modern Awards are entitled to 5 weeks (190 hours) annually
- Annual leave accrues during paid leave but NOT during unpaid leave
- ALL accrued leave must be paid out on termination at the base rate of pay
The Basic Accrual Formula
The Fair Work Act specifies that annual leave accrues progressively according to ordinary hours worked. Here is the fundamental formula:
Full-Time Employees (38-hour week)
Weekly Accrual: (Ordinary hours worked per week ÷ 38) × (4 ÷ 52)
For a standard full-time employee working 38 hours per week, this equals approximately 2.923 hours per week, or roughly 0.077 weeks per week.
Example: Full-Time Accrual Over 6 Months
| Period | Hours Worked | Accrued Leave Hours |
|---|---|---|
| Month 1 | 152 hours | 11.69 hours |
| Month 2 | 152 hours | 23.38 hours |
| Month 3 | 152 hours | 35.08 hours |
| Month 4 | 152 hours | 46.77 hours |
| Month 5 | 152 hours | 58.46 hours |
| Month 6 | 152 hours | 76.15 hours |
After 6 months, a full-time employee has accrued exactly half their annual entitlement — not zero and not the full 152 hours. This progressive accrual from day one is a mandatory requirement under the NES.
Part-Time Employees
Part-time employees receive the same 4 weeks entitlement, calculated pro-rata based on their ordinary hours:
Weekly Accrual: (Ordinary hours worked per week ÷ 38) × (4 ÷ 52)
Example: Part-Time Employee (20 hours per week)
An employee working 20 hours per week accrues:
(20 ÷ 38) × (4 ÷ 52) = 1.538 hours per week
Over a full year, this equals 80 hours of annual leave — exactly 4 weeks for a 20-hour week.
Part-Time Accrual Calculator Table
Use this table to estimate annual leave accrual for different part-time hours:
| Weekly Hours | Monthly Accrual (Hours) | Annual Entitlement (Hours) | Annual Entitlement (Weeks) |
|---|---|---|---|
| 8 hours | 6.15 hours | 80 hours | 4 weeks |
| 12 hours | 9.23 hours | 120 hours | 4 weeks |
| 15 hours | 11.54 hours | 150 hours | 4 weeks |
| 19 hours | 14.61 hours | 190 hours | 4 weeks |
| 24 hours | 18.46 hours | 240 hours | 4 weeks |
| 30 hours | 23.08 hours | 300 hours | 4 weeks |
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Shift Worker Entitlements (5th Week)
Certain Modern Awards and enterprise agreements provide shift workers with an additional week of annual leave, for a total of 5 weeks (190 hours) annually.
What Is a Shift Worker?
The definition varies by award, but shift workers typically meet these criteria:
- Regularly rostered to work on Sundays and public holidays
- Work rotating shifts across a 24-hour period
- Work in a business that operates on a continuous or semi-continuous basis
Common awards with shift worker provisions include:
- Hospitality Industry (General) Award
- General Retail Industry Award
- Building and Construction General On-site Award
- Manufacturing and Associated Industries and Occupations Award
Shift Worker Calculator
| Hours Worked | Standard Entitlement (4 weeks) | Shift Worker Entitlement (5 weeks) | Additional Hours |
|---|---|---|---|
| 38 hours/week | 152 hours/year | 190 hours/year | +38 hours |
| 30 hours/week | 120 hours/year | 150 hours/year | +30 hours |
| 20 hours/week | 80 hours/year | 100 hours/year | +20 hours |
Leave Loading Calculation (17.5%)
Many Modern Awards require employers to pay an additional 17.5% leave loading on top of the employee’s base rate when annual leave is taken.
The Formula
Leave Loading = Base hourly rate × 0.175 × Hours of annual leave taken
Worked Example
Employee earns $25/hour base rate and takes 1 week (38 hours) of annual leave:
- Base pay: $25 × 38 = $950
- Leave loading: $25 × 0.175 × 38 = $166.25
- Total pay: $950 + $166.25 = $1,116.25
Important Notes
- Leave loading is calculated on the BASE rate only — excludes overtime, bonuses, and allowances
- Some awards use a “greater of” rule: pay whichever is higher — 17.5% loading OR penalty rates the employee would have earned while working
- Leave loading must be paid out on termination if required by the applicable award
Termination Payout Calculation
All accrued but unused annual leave MUST be paid out on termination, regardless of whether the employee resigns, is made redundant, or is dismissed.
The Termination Formula
Termination Payout = Accrued leave hours × Base hourly rate
If leave loading applies under the award or agreement, add:
Total Termination Pay = (Accrued leave hours × Base hourly rate) + Leave loading
Example: Employee Resigns with 76 Hours Accrued
Employee base rate: $28/hour Accrued leave: 76 hours Leave loading applies: Yes
- Base leave pay: 76 × $28 = $2,128
- Leave loading: 76 × $28 × 0.175 = $372.40
- Total termination pay: $2,500.40
Accrual During Leave Periods
Annual leave accrues differently depending on the type of leave the employee is taking:
| Leave Type | Does Annual Leave Accrue? |
|---|---|
| Annual leave | YES |
| Personal/carer’s leave | YES |
| Compassionate leave | YES |
| Long service leave | NO |
| Unpaid parental leave | NO |
| Unpaid personal leave | NO |
| Workers compensation (first 6 months) | NO (varies by jurisdiction) |
This means an employee taking paid annual leave continues to accrue additional annual leave during that period. An employee on unpaid parental leave does NOT accrue annual leave.
Common Calculation Mistakes
These errors frequently lead to underpayments and Fair Work investigations:
1. Including Overtime in Accrual Calculations
Annual leave accrues on ordinary hours only — overtime, bonus hours, and additional payments do NOT count toward accrual. Use the employee’s contracted hours for calculations.
2. Incorrect Part-Time Pro-Rata
Part-time entitlements are not simply “half” or “quarter” of full-time. Calculate pro-rata based on actual ordinary hours worked. If a part-time employee’s hours change, recalculate accrual.
3. Missing the Shift Worker Entitlement
Employees who meet the shift worker definition under their award are entitled to 5 weeks, not 4. Missing this results in systematic underpayment.
4. Forgetting Leave Loading on Termination
Many awards require leave loading to be paid out on termination alongside unused annual leave. This is a common omission.
5. Calculating Loading on Gross Pay
Leave loading is calculated on the BASE rate only — exclude overtime, bonuses, shift penalties, and allowances. Using gross pay results in overpayment.
6. Applying “Use It or Lose It” Policies
Australian law does NOT permit employers to impose a “use it or lose it” policy on annual leave. Accrued leave carries over indefinitely. Forcing employees to forfeit accrued leave is unlawful and creates back-pay liability.
Annual Leave Accrual Reference Table
This table shows weekly accrual for common full-time scenarios:
| Standard Hours (Weekly) | Annual Entitlement | Weekly Accrual | Fortnightly Accrual |
|---|---|---|---|
| 38 hours | 152 hours | 2.923 hours | 5.846 hours |
| 40 hours | 160 hours | 3.077 hours | 6.154 hours |
| 35 hours | 140 hours | 2.692 hours | 5.385 hours |
FAQ: Annual Leave Calculations
How do I calculate annual leave for an employee who changes hours?
Recalculate the accrual rate whenever an employee’s ordinary hours change. Example: An employee moves from 20 hours/week to 30 hours/week — calculate accrual at the 20-hour rate for that period, then switch to the 30-hour rate going forward. Leave Balance handles pro-rata calculations automatically when you update an employee’s hours.
Does annual leave accrue during long service leave?
No. Annual leave accrues during paid leave types (annual, personal/carer’s, compassionate) but NOT during unpaid leave types including long service leave, unpaid parental leave, and unpaid personal leave.
What if an employee works overtime regularly?
Overtime hours do NOT count toward annual leave accrual. Only ordinary hours (the hours in the employee’s contract or award) accrue annual leave. This is a mandatory requirement under the NES.
How do I calculate leave loading on termination?
Calculate it the same way you would for annual leave taken: (Accrued leave hours × Base hourly rate × 0.175). Add this to the base leave payout. Note that some awards specify different rules or exclude leave loading from termination payouts — check the applicable award.
Can I force employees to take annual leave to reduce liability?
You can reasonably direct employees to take annual leave if they have excessive accrued leave, but you cannot force forfeiture. The Fair Work Commission has taken action against employers who try to compel employees to “use it or lose it.” Excessive leave is generally defined as more than 8 weeks for full-time employees.
What happens if I miscalculate and underpay an employee?
Since January 2025, intentional wage underpayment is a criminal offence in Australia. Civil penalties also apply even for honest mistakes. If you discover a miscalculation, correct it immediately and pay back any owed entitlements. Self-reporting to the Fair Work Ombudsman can reduce penalties in some cases.
How does annual leave work for casual employees?
Casual employees are NOT entitled to paid annual leave. They receive a 25% casual loading on their base hourly rate to compensate for the lack of paid leave entitlements, notice of termination, and redundancy pay. Casual loading does NOT accrue toward any leave balance.
What if the applicable award has different entitlements?
Modern Awards and enterprise agreements can provide MORE than the NES minimum, but never less. If an award provides 5 weeks for shift workers or additional leave types, you must honour those higher entitlements. The NES is the floor — awards and agreements build on it.
Do I need to pay annual leave out if an employee is fired?
Yes. ALL accrued annual leave must be paid out on termination regardless of the reason — resignation, redundancy, dismissal, or end of contract. This is a mandatory NES requirement and cannot be contracted out of.
How often should I audit leave calculations?
Quarterly audits are recommended to catch calculation errors before they compound. Common audit points: verify accrual rates for part-time employees, confirm shift worker classification where applicable, check leave loading calculations, and review termination payouts for accuracy.
Next Steps
Now that you understand annual leave calculations, you may want to explore related topics:
- Leave Loading in Australia: How to Calculate It and Who Gets It — detailed guide to 17.5% loading requirements
- Leave Payout on Termination in Australia: What Employers Owe — comprehensive guide to termination obligations including long service leave
- Annual Leave Entitlements in Australia: The Complete Employer’s Guide for 2026 — full NES coverage including accrual rules and common mistakes
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