How to Check an Overtime Calculation in Australia

What You Need Before You Start

Before checking any overtime calculation, gather the following information. Most of it can be found on your payslip or employment contract:

• Your base hourly rate — the ordinary rate before any loadings or penalties
• Your employment type — full-time, part-time, or casual
• The applicable Modern Award or enterprise agreement — this is what sets your actual entitlements
• Your ordinary hours for the pay period — total hours worked and which hours were ordinary vs overtime
• The days you worked — weekday, Saturday, Sunday, or public holiday
• The times you worked — some awards include evening or shift loadings

If you are unsure which award applies to you, see the guide How to Find Your Award in Australia.

How to Identify Your Base Hourly Rate

Your base hourly rate (sometimes called the ordinary rate) is the rate paid for a standard hour of work — before overtime multipliers, penalty rates, or casual loading are applied.

On a payslip, the base rate may appear as:

• A line item labelled "ordinary rate", "base rate", or "standard rate"
• A dollar figure per hour, typically lower than any penalty or overtime rate shown

If you are a casual employee, your payslip may show a "casual rate" that already includes casual loading on top of the base rate. In that case, the underlying base rate is typically the casual rate divided by 1.25 (for a 25% loading), though this depends on your award.

If you receive an annualised salary, the equivalent hourly rate will need to be calculated from your annual salary and ordinary hours. This is more complex — the Fair Work Pay and Conditions Tool can assist.

How to Check Ordinary Hours vs Overtime Hours

The split between ordinary hours and overtime hours depends on the threshold set by your award or enterprise agreement. Common thresholds include:

• Daily threshold: overtime begins after a set number of hours in a single shift (commonly 8 or 10 hours per day)
• Weekly threshold: overtime begins after 38 ordinary hours in a week
• Both: some awards apply whichever threshold is reached first

To check: add up your ordinary hours for the pay period and identify which hours exceed the applicable threshold. Any hours beyond the threshold may be payable at an overtime rate. The exact rate and tier structure (e.g. time and a half for the first 2 hours, then double time) is set by your award.

See: Daily vs Weekly Overtime in Australia for a detailed explanation with worked examples.

How to Check Penalty Rates

Penalty rates apply to hours worked at specific times — evenings, weekends, and public holidays — regardless of whether those hours are ordinary or overtime. They are set by your applicable Modern Award or enterprise agreement.

To verify a penalty rate on your payslip:

1. Identify the day or time the hours were worked
2. Find the relevant penalty rate in your Modern Award (the Fair Work Award list has full pay guides for each award)
3. Multiply the applicable rate (e.g. 1.5× for Saturday) by your ordinary rate
4. Compare to what appears on your payslip

Common penalty rate multipliers across many awards include 1.25× to 1.5× for Saturday, 1.5× to 2.0× for Sunday, and around 2.5× for public holidays — but your award may differ.

How to Check Casual Loading

Casual employees are generally paid a loading to compensate for the absence of paid leave entitlements. Many Modern Awards specify 25% casual loading, though some awards set a different rate or use a flat casual rate instead.

To check casual loading on a payslip:

1. Identify the base rate from your award or contract
2. Calculate the loaded rate: base rate × (1 + loading percentage). For 25%: base × 1.25
3. Check whether penalty rates are then applied to the loaded rate or separately to the base rate — this depends on your award. See Casual Loading and Penalty Rates

Checklist: Verifying Your Overtime Pay

Worked Example

Full-time employee, Tuesday 10-hour shift

Award: General Retail Industry Award 2020 (simplified for illustration). Base rate: $25.00/hr. Overtime threshold: 8 hours per day. Overtime rates: 1.5× for hours 9–10, 2.0× beyond that.

If your payslip shows a different total for this shift, check: (1) whether the base rate matches your award classification, (2) whether the daily threshold is 8 hours under your specific award, and (3) whether any allowances or penalty rates are included.

When to Use Fair Work Instead of This Site

This calculator is a general estimation tool — it uses common defaults and cannot account for every award provision. Use Fair Work Ombudsman resources instead when:

• You believe you have been underpaid and want to make a formal inquiry or complaint
• Your award has unusual provisions (set-off clauses, annualised salary arrangements, enterprise agreement overrides)
• You need authoritative confirmation of your specific entitlements
• Your employer disputes your pay and you need an official reference
• You are calculating superannuation, tax, or leave entitlements

The Fair Work Pay and Conditions Tool allows you to enter your award, classification, and hours to get more accurate estimates. For disputes, contact the Fair Work Ombudsman directly.

See also: Daily vs Weekly Overtime • Why Your Payslip May Not Match • Worked Examples