How Overtime Pay Is Calculated

Overtime is paid at a higher rate than ordinary hours — but the multipliers and rules confuse many workers. Here is how it works.

Plantrino Guides · Updated 2026 · About a 9-minute read

When you work beyond your normal hours, you are often entitled to be paid at a higher rate. The principle is simple, but the terms — time-and-a-half, double-time, penalty rates — and the rules around them leave many people unsure whether their pay is correct. This guide explains the mechanics.

What Overtime Is

Overtime generally refers to hours worked beyond your ordinary or agreed hours. Because those extra hours ask more of you — evenings, weekends, longer days — they are commonly paid at a rate higher than your standard hourly pay. The exact definition of when overtime begins depends on your employment terms.

The Common Multipliers

Overtime is usually expressed as a multiple of your ordinary hourly rate. Two terms come up constantly:

• Time-and-a-half means 1.5 times your normal rate.
• Double-time means 2 times your normal rate.

If your ordinary rate is 30 and you work 4 hours at time-and-a-half: 30 × 1.5 × 4 = 180. Those same 4 hours at your ordinary rate would have paid 120, so the overtime premium added 60.

Many awards also step the multiplier up as overtime stretches on — a common pattern is time-and-a-half for the first block of overtime hours, then double-time after that. The switch point matters: on a 30 rate, a six-hour overtime stint paid as "first 3 at 1.5, rest at 2" comes to 135 + 180 = 315, not the 270 you would get if the whole stint were paid at 1.5. Which pattern applies to you comes from your award or agreement, not from a universal rule.

A Fuller Example

Suppose in one week you work 38 ordinary hours plus 3 hours at time-and-a-half and 2 hours at double-time, on a 30 ordinary rate:

• Ordinary: 38 × 30 = 1,140
• Time-and-a-half: 3 × 30 × 1.5 = 135
• Double-time: 2 × 30 × 2 = 120
• Total gross: 1,395

Breaking pay into these blocks is exactly how payroll systems handle it — and how you can check your own.

Penalty Rates

Closely related to overtime are penalty rates — higher rates paid for working at particular times, such as weekends, public holidays, or late-night shifts. The "penalty" is on the employer, not the worker; it is extra pay that compensates for less sociable hours. Penalty rates and overtime rates can sometimes apply to the same hours, depending on the rules covering your job.

Is Overtime Taxed More? (The Big-Withholding Myth)

A stubborn myth says overtime "isn't worth it because it all goes in tax". Here is what actually happens. Employers withhold tax from each pay as if that pay were your normal, ongoing rate — so a week fattened by overtime gets withheld at a higher clip, and the tax line on that payslip looks alarming. But your final tax for the year is worked out on your annual income at ordinary marginal rates, exactly like the rest of your pay. If the withholding overshot during big weeks, the difference comes back at tax time as part of your refund.

Overtime dollars are taxed the same way as any other dollars of income. The extra hours are always worth more in your pocket than the same hours at ordinary rates — the myth confuses a temporary withholding effect with a permanent tax penalty.

Time Off Instead of Pay (TOIL)

Some workplaces offer time off in lieu — taking the overtime as extra leave rather than extra pay. The detail that matters is the exchange rate: an hour of overtime that would have been paid at time-and-a-half is, under many arrangements, worth more than one hour of leave. TOIL generally requires agreement rather than being imposed, and unused TOIL usually must eventually be paid out. If you are offered it, ask two questions: at what rate does it accrue, and what happens to it if you leave?

Where the Rules Come From

When and how overtime and penalty rates apply is not the same for every worker. It depends on the framework covering your employment — in Australia, this may be an award, an enterprise agreement, or an individual contract. These set out the ordinary hours, the multipliers, and the conditions. Some salaried roles, by contrast, may have overtime built into the salary rather than paid separately. Because of this variation, your own employment terms are the place to confirm what you are entitled to — and the Fair Work Ombudsman is the official source for checking award conditions.

Common Overtime Mistakes

Checking the multiplier but not the base. An overtime line can show the right 1.5 applied to the wrong ordinary rate. Confirm the base rate first; every multiplier error is small next to a wrong base.

Assuming a salary covers unlimited extra hours. Salaried arrangements often absorb some additional hours, not endless ones. If your role has quietly grown into regular long weeks, it is reasonable to check what your contract actually says the salary covers.

Not keeping your own record. Payroll disputes are won with contemporaneous notes. A simple log — date, start, finish, break — takes seconds and turns "I think I worked more" into a checkable claim.

Letting TOIL accumulate unwritten. Informal "take some time later" promises evaporate when managers change. Get TOIL recorded in the same system as your leave.

Frequently Asked Questions

Overtime pay is your ordinary rate lifted by a multiplier — 1.5 for time-and-a-half, 2 for double-time — applied to the extra hours you work. Penalty rates work similarly for unsociable times. Know the multipliers, know where your rules come from, and check your payslip reflects them.