How To Calculate Accrued Annual Leave In Australia

Understanding how to calculate accrued annual leave is an important part of running a compliant, fair workplace in Australia. Whether you’re handling payroll, building HR processes, or simply checking your own balance, getting annual leave accrual right helps you meet your legal obligations and builds trust with your team.

Done well, it streamlines approvals, reduces disputes and makes offboarding smoother. Get it wrong and you can face underpayments, back-pay claims or audits under the Fair Work system. The good news: with a clear process and a few simple formulas, you can calculate leave accrual with confidence.

In this guide, we’ll break down how annual leave accrues under Australian law, step through the calculations, and address common scenarios like part-time hours, shiftwork and overtime. We’ll also cover payouts on termination and the key documents that help you stay compliant.

What Is Annual Leave Accrual?

Annual leave accrual is the process of progressively “earning” paid time off as an employee works their ordinary hours. In Australia, the National Employment Standards (NES) give most full-time and part-time employees a minimum of four weeks of paid annual leave for each year of service. Certain shift workers are entitled to five weeks, depending on their award or enterprise agreement.

Accrual is based on ordinary hours of work (not overtime). It builds up continuously during employment and carries over from year to year if it isn’t taken. Casual employees are not entitled to paid annual leave under the NES.

How Does Annual Leave Accrue Under The NES?

The NES sets the national baseline. Awards, enterprise agreements and contracts can add to these minimums, but can’t reduce them. At a practical level, this means you should always confirm what counts as “ordinary hours” for each role and whether any extra entitlements apply under the relevant award or agreement.

• Full-time employees: Typically work 38 ordinary hours per week and accrue leave on those hours.
• Part-time employees: Accrue leave on their contracted ordinary hours on a pro-rata basis (for example, if an employee’s ordinary hours are half of full-time, accrual occurs at half the full-time rate).
• Overtime: Annual leave generally does not accrue on overtime. Accrual is tied to ordinary hours only, unless an award or agreement expressly states otherwise.
• Shift workers: Some shift workers receive five weeks of annual leave per year; check the relevant modern award or enterprise agreement to confirm eligibility.

Defining “ordinary hours” clearly in each role’s Employment Contract and checking the applicable modern award or enterprise agreement is essential. This ensures you’re accruing leave against the correct hours and minimises errors.

Step-By-Step: Calculating Accrued Annual Leave

1) Confirm Ordinary Hours

Annual leave accrues on ordinary hours only. Ordinary hours are usually set out in the employee’s contract and informed by any applicable award or enterprise agreement. For full-time employees, that’s commonly 38 hours per week. For part-time employees, it’s the agreed weekly pattern (for example, 24 hours per week across three days).

2) Use the 4/52 Formula

Employees covered by the NES accrue four weeks of paid annual leave per year (or five weeks for eligible shift workers). To convert that entitlement into weekly accrual in hours, use this formula:

Weekly annual leave accrual (hours) = Ordinary hours per week × (4 ÷ 52)

Examples:

• Full-time (38 hours/week): 38 × (4 ÷ 52) = 2.923 hours per week
• Part-time (20 hours/week): 20 × (4 ÷ 52) = 1.538 hours per week

This weekly accrual rate is what your payroll system should be adding to the employee’s leave balance each pay cycle (pro-rated for fortnightly or monthly pay periods).

3) Accrue Progressively Each Pay

Annual leave doesn’t drop in once a year. It accrues progressively as the employee works. If a full-time employee accrues 2.923 hours per week, after 10 weeks they’ll have about 29.23 hours available (before any leave taken).

4) Convert Back To Days Or Weeks When Needed

Leave balances are typically tracked in hours. If you need to express a balance as days or weeks, convert using the employee’s ordinary hours:

• Four weeks for a 38-hour full-time employee = 4 × 38 = 152 hours per year.
• Four weeks for a part-time employee who works 18 ordinary hours per week = 4 × 18 = 72 hours per year.

If you want to know how many hours three weeks of leave equals, multiply ordinary weekly hours by 3. For a 38-hour employee, that’s 3 × 38 = 114 hours.

5) Check Your Award Or Agreement For Any Variations

Most employees will follow the standard NES calculations. However, awards and enterprise agreements can include extra rules (such as additional leave for shift work or industry-specific arrangements). Always check the applicable instrument if there’s any uncertainty.

Part-Time, Shiftwork And Overtime: Special Rules

Part-Time Accrual (Pro-Rata)

Part-time employees accrue annual leave on their ordinary hours in proportion to a full-time employee. The calculation is the same as for full-time staff, just with a lower number of ordinary hours per week.

• Example: A part-time employee works 24 ordinary hours per week. Weekly accrual = 24 × (4 ÷ 52) = 1.846 hours per week.

If hours vary week to week, accrue leave each pay cycle based on the ordinary hours worked in that period. Over time, this produces the correct pro-rata result. For more practical guidance on part-time entitlements, see our overview of annual leave for part-time employees.

Shift Workers And Additional Leave

Some shift workers are entitled to five weeks of annual leave each year under their award or agreement. If this applies, simply substitute “5” in place of “4” in the formula. For example, a 38-hour shift worker would accrue 38 × (5 ÷ 52) = 3.654 hours per week. Confirm eligibility against the relevant instrument before changing your payroll settings.

Overtime And Additional Hours

Annual leave generally does not accrue on overtime. Accrual is tied to ordinary hours only. If an employee occasionally works additional hours that are still part of their ordinary roster (for example, a flexible arrangement within contracted ordinary hours), they may count-however, classic overtime paid at a higher rate usually won’t.

Because award terms can differ, it’s best to anchor your approach to what your modern award or agreement defines as ordinary hours and record that clearly in the Employment Contract.

Does Annual Leave Accrue While On Leave?

Annual leave generally continues to accrue while an employee is on paid leave (for example, paid annual leave or paid personal/carer’s leave), because those periods usually count as service. By contrast, unpaid leave (such as unpaid parental leave) typically does not accrue annual leave for that period.

Other entitlements-like long service leave-are governed by state and territory legislation. Accrual rules for long service leave during paid or unpaid absences vary by jurisdiction and can be subject to specific conditions. If you’re unsure, seek advice before setting a blanket policy.

Paying Out Unused Annual Leave On Termination

When employment ends (resignation, redundancy or dismissal), you must pay out all unused, accrued annual leave. Here’s the basic approach:

1. Calculate the total accrued but untaken annual leave in hours up to the final day of employment.
2. Multiply those hours by the employee’s current ordinary hourly rate, adding annual leave loading if it applies under the relevant award, agreement or contract.

Example: An employee has 38 hours of untaken annual leave, their ordinary rate is $30/hour, and a 17.5% annual leave loading applies. Payout = 38 × ($30 × 1.175) = $1,339.50.

Only include leave loading if the employee is entitled to it. If you’re unsure when loading applies, our guide to annual leave loading explains common scenarios. For a broader step-by-step on final amounts (including other termination components), see our guide to calculating final pay.

Tax, Super And Timing

Tax and superannuation settings depend on the specific payment type and timing. As a general note, unused annual leave paid out on termination is treated differently from leave taken during employment for super purposes. Check your payroll system’s current ATO settings and award requirements and seek professional advice if needed.

Records, Policies And Documents To Stay Compliant

Clear documents and consistent processes make leave management simpler, especially as your team grows. Consider putting the following in place:

• Employment Contracts: Define ordinary hours, classification, award coverage and any loading so accrual calculations are unambiguous. A tailored Employment Contract for full-time and part-time employees is the best place to set this out.
• Leave Policy: Explain how annual leave accrues, how to request leave, notice requirements, peak-period restrictions and any approval process. A comprehensive workplace policy ensures everyone understands the rules.
• Payroll And Record-Keeping: Use reliable payroll software to accrue leave accurately each pay and show balances on payslips. Keep records of approvals and adjustments (for example, corrections after roster changes).
• Award/Agreement Reference: Keep an internal register of which award or agreement applies to each role, so you can quickly confirm entitlements like extra leave for shift workers. If in doubt, review the modern award coverage.
• Cashing Out Policy (If Applicable): Cashing out annual leave is allowed in limited circumstances if the award or agreement permits it and minimums are met. Our summary of cashing out annual leave outlines the rules and risks.

It’s also good practice to give employees visibility of their balances and help them plan leave throughout the year. This keeps accruals under control and supports wellbeing.

Worked Examples You Can Reuse

Full-Time Employee (38 Ordinary Hours)

Weekly accrual: 38 × (4 ÷ 52) = 2.923 hours per week.

After 26 weeks: 2.923 × 26 = 75.998 hours (about 76 hours).

Annual entitlement (hours): 4 × 38 = 152 hours per year.

Part-Time Employee (24 Ordinary Hours)

Weekly accrual: 24 × (4 ÷ 52) = 1.846 hours per week.

After 20 weeks: 1.846 × 20 = 36.92 hours.

Annual entitlement (hours): 4 × 24 = 96 hours per year.

Shift Worker Entitled To 5 Weeks (38 Ordinary Hours)

Weekly accrual: 38 × (5 ÷ 52) = 3.654 hours per week.

Annual entitlement (hours): 5 × 38 = 190 hours per year.

What If The Contracted Week Isn’t 38 Hours?

Use the same formula, substituting the employee’s ordinary hours. If a contract specifies 40 ordinary hours per week, weekly accrual is 40 × (4 ÷ 52) = 3.077 hours per week (or 40 × (5 ÷ 52) = 3.846 for a five-week entitlement).

Part-Time With Variable Patterns

If the employee’s hours vary but remain within contracted ordinary hours, accrue leave each pay based on the ordinary hours actually worked in that period. Over the year, this produces the correct pro-rata outcome. Make sure the employment contract and roster settings distinguish ordinary hours from overtime to avoid overaccruing.

Common Pitfalls (And How To Avoid Them)

• Accruing on overtime by mistake: Check your payroll configuration and ensure that only ordinary hours accrue annual leave unless an award clearly says otherwise.
• Not updating when hours change: If an employee moves from full-time to part-time (or vice versa), update their contracted ordinary hours in the system straight away so accruals stay accurate.
• Assuming every shift worker gets five weeks: This depends on the award or agreement and specific shiftwork definitions. Confirm eligibility before you apply the five-week rate.
• Overgeneralising accrual during absences: Annual leave generally accrues during paid leave, but other entitlements (like long service leave) have state-based rules. Treat them separately and check the legislation that applies to your location.
• Forgetting about leave loading at termination: If the employee is entitled to loading, include it when paying out unused annual leave. If not, don’t add it by default. Use our overview of annual leave loading as a sense-check.

Key Takeaways

• Under the NES, most full-time and part-time employees accrue four weeks of paid annual leave per year (five weeks for some shift workers), based on ordinary hours only.
• The core accrual formula is: weekly accrual (hours) = ordinary hours × (4 ÷ 52). For a 38-hour week, that’s 2.923 hours per week (152 hours per year).
• Part-time employees accrue on a pro-rata basis using their own ordinary hours; variable patterns should be accrued each pay against ordinary hours actually worked.
• Annual leave generally accrues during paid leave, and not during unpaid leave; treat other entitlements like long service leave separately because they’re state-based.
• On termination, pay out all unused accrued annual leave at the current ordinary rate, adding leave loading if the employee is entitled to it; see our guide to calculating final pay for a broader checklist.
• Document ordinary hours and award coverage in the Employment Contract, maintain a clear leave policy, and align your payroll settings with the applicable modern award or agreement to stay compliant.
• If you allow cashing out of annual leave, make sure your approach meets the requirements set by the relevant instrument; review the rules for cashing out annual leave before implementing a policy.

If you’d like a consultation on annual leave calculations, setting up compliant employment contracts or creating a clear leave policy, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.