Time and a Half, Explained: How Overtime Pay Actually Gets Calculated

"Time and a half" is a phrase most working people have heard, but far fewer could actually calculate correctly from a payslip — and that gap is exactly where payroll mistakes, usually unintentional, tend to hide.

The basic formula

Overtime pay is your regular hourly rate multiplied by an overtime factor — most commonly 1.5x — applied only to the hours worked beyond a standard threshold, typically 40 hours in a week (though this varies by country and employer policy). Hours up to the threshold are paid at the normal rate; only hours above it get the multiplier.

A worked example

At a regular rate of 500 per hour, 160 regular hours in a pay period pays 80,000 as expected. Add 12 hours of overtime at a 1.5x multiplier: the overtime rate becomes 750 per hour, so those 12 hours add 9,000. Total pay for the period comes to 89,000 — not simply 172 hours multiplied by 500, which would understate what's actually owed.

Where the multiplier changes

1.5x is common but not universal. Some employers or labor laws specify 2x ("double time") for hours worked on public holidays, on a designated rest day, or beyond a second, higher threshold within the same week. The multiplier that applies depends entirely on the specific employment contract and local labor law — never assume 1.5x is automatic without checking.

Using this to check a payslip

Because overtime miscalculation is a genuinely common (usually unintentional) payroll error — particularly around holiday weeks or when multiple pay rates apply — independently recalculating a payslip using the same regular hours, overtime hours and rate is a legitimate way to verify it. A mismatch is worth raising directly with payroll rather than assuming it will self-correct.

Salaried versus hourly overtime eligibility

Not every role is eligible for overtime pay in every jurisdiction — many labor laws distinguish between "exempt" salaried positions (often management or specific professional categories) and "non-exempt" roles that are legally entitled to overtime compensation once they cross the weekly hours threshold. Whether a specific position qualifies depends on local labor law and the actual nature of the role, not simply whether someone is paid a salary versus an hourly wage — job titles alone are not always a reliable guide to which category applies.

Averaging hours across a period

Some workplaces calculate overtime based on hours averaged across a longer period (say, a two-week pay cycle) rather than strictly week by week, which can produce a different result than treating each week in isolation — working 50 hours one week and 30 the next might not trigger any overtime under an averaged system, even though it clearly would under a strict weekly threshold. Knowing which method a specific employer or jurisdiction uses is necessary before treating any overtime calculation, including this one, as the final word on what is legally owed.