Ordinary Hours, Spread of Hours and Averaging Explained

Your ordinary hours of work are the hours treated as normal, un-loaded working time. Overtime is what you work beyond them. But the definition of ordinary hours — how many per day, how many per week, and how they are arranged — comes from the modern award or enterprise agreement covering your job. There is no universal statutory figure for "ordinary hours"; it is an instrument-specific concept.

To see how it works in practice, take one award as an illustration — and only as an illustration, because a different award sets different rules. The Clerks—Private Sector Award 2020 [MA000002] provides that an employer must pay the overtime rate for hours worked at the employer's direction in excess of the ordinary weekly hours; or in excess of 10 ordinary hours on any one day (excluding unpaid meal breaks); or outside the spread of ordinary hours (cl. 21.1). Three separate triggers, all defined by that award. Yours may look different.

The spread of ordinary hours is the window of the day within which ordinary hours may be worked — for example, a span between an early morning start and an early evening finish. Work outside that spread can attract overtime or penalty treatment even if your total weekly hours are modest, because it falls outside the times the award treats as "ordinary".

In the MA000002 illustration above, working "outside the spread of ordinary hours" is itself one of the triggers for the overtime rate (cl. 21.1). This is why two employees who work the same number of hours can be owed different amounts: one worked them inside the spread, the other partly outside it. The spread is an award concept — check your own award for where its window sits.

The NES set a maximum weekly hours standard of 38 hours plus reasonable additional hours (art. 62). But those hours can lawfully be averaged over a period, so that a busy week and a quiet week balance out rather than each being judged on its own.

There are two averaging routes in the Fair Work Act. Article 63 allows averaging terms to be included in a modern award or enterprise agreement — the instrument sets the averaging period. Article 64 allows an employer and an award- and agreement-free employee to agree in writing to an averaging arrangement, within the limits the Act sets. Where averaging applies, it changes how the 38-hour threshold is measured, and therefore when an hour tips over into overtime. So before qualifying any hour as "extra", establish whether an averaging term applies to you.

Picture it as a stack. At the base is the NES 38-hour ceiling (art. 62) — the maximum weekly hours standard that cannot be displaced (art. 61). On top of that, your award or agreement defines your ordinary hours and their spread — the concrete lines that decide, day by day, when work becomes overtime. And averaging (art. 63 or art. 64) can stretch the measurement of the weekly threshold across a period rather than a single week.

Understanding ordinary hours is therefore a prerequisite to qualifying any hour as overtime. You cannot claim an overtime premium for the "41st hour" without first knowing whether your ordinary hours were 38, whether an averaging period applies, and whether the hour fell inside or outside your spread. Those are award questions — and where the award is not yet identified, the safe course is to fall back on the NES threshold and flag the rest.

If your award or agreement is not yet identified, a careful hours audit does not invent ordinary hours or a spread. Instead it defaults to the 38-hour weekly NES threshold as the qualification line, values any unpaid hour at your ordinary hourly rate (a certain 1:1 floor, checked against the National Minimum Wage — $26.44 per hour from 1 July 2026, [2026] FWCFB 3500), and flags the result as "to be qualified with the award". That way the certain floor is captured now, and the award-specific overtime premium is added once your instrument is confirmed. Nothing is guessed, and nothing that is genuinely owed is left on the table.