How to calculate overtime pay
TL;DR, the essentials
- The core formula is simple: overtime hours × hourly rate × overtime multiplier.
- Common multipliers are time and a half (1.5x) and double time (2x), but the exact figure depends on your contract, collective agreement or local law.
- What counts as “overtime” and whether a premium is mandatory varies a lot between countries. The UK, for example, has no legal minimum overtime rate.
- For salaried staff you first convert the annual salary into an hourly rate before applying any multiplier.
- The methods below are indicative and educational, not personalised legal or payroll advice.
An employee worked past their normal hours this week, and now you need to put a number on it. How much extra, from which hour, and at what rate? This guide explains how to calculate overtime pay step by step: what counts as overtime, the usual multipliers, a clear formula and worked examples. Because overtime rules vary by country (and often by contract or collective agreement), treat the figures below as illustrative and always check the rules that apply where you employ people.
What actually counts as overtime?
Overtime is generally the time an employee works beyond their normal or contracted hours, usually at the employer’s request or with their agreement. What “normal hours” means, and whether the extra time attracts a premium, is set by the contract, a collective agreement or local law rather than by a single universal rule. Three things shape every calculation.
A defined threshold
Overtime starts once the employee passes a reference number of hours, typically their weekly contracted hours. In some countries that threshold is fixed by law; in others it is set purely by the contract.
Actual working time
Only genuine working time counts. Unpaid meal breaks and the ordinary home-to-work commute are usually excluded from the total.
Employer agreement
The hours normally need to be requested or approved by the employer. Extra time worked on the employee’s own initiative, without sign-off, is harder to claim.
Worth knowing
Even where overtime is allowed, working-time limits still apply. In the UK, for instance, average weekly working time is generally capped at 48 hours under the Working Time Regulations (workers can opt out in writing), and there are daily and weekly rest requirements. Limits and opt-outs differ by country.
What are the common overtime rates?
This is the heart of the calculation. In many countries and contracts, overtime is paid at a premium above the normal hourly rate, expressed as a multiplier.
- Time and a half (1.5x): the most common premium for the first band of overtime hours.
- Double time (2x): often used for hours worked on rest days, public holidays, or beyond a higher threshold.
- Plain time (1x): some contracts simply pay the normal rate for extra hours, with no premium.
Crucially, these multipliers are conventions, not a single global standard. In the United States, federal law (the Fair Labor Standards Act) requires at least 1.5x for hours over 40 in a week for covered, non-exempt employees. In the United Kingdom, by contrast, there is no statutory minimum overtime rate: pay depends on the employment contract, though average pay across normal and overtime hours must not fall below the National Minimum Wage. Always check the contract and local rules before you settle on a multiplier.
The formula is the easy part. The number that really matters is the multiplier, and that comes from the contract or the law where you employ, not from a rule of thumb.The MiisterSoftware team, payroll basics.
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How to calculate overtime pay, step by step
The calculation rests on the employee’s hourly rate, to which you apply the multiplier. Here is the method, shown for guidance.
Find the hourly rate
For an hourly worker, this is already known. For a salaried worker, divide the annual salary by the number of paid working hours per year (for example, 40 hours × 52 weeks = 2,080 hours in a common full-time pattern).
Count the overtime hours
Work out how many hours fall above the threshold, and split them by band if different multipliers apply (for example, 1.5x for the first tier and 2x beyond it).
Apply the multiplier
Multiply each band of hours by the rate and its multiplier. The formula: overtime hours × hourly rate × multiplier. Add the bands together for the total overtime pay.
Handy tip
Some contracts or agreements let employers give time off in lieu (TOIL) instead of paying overtime. In that case, an hour worked may convert into an equivalent (or premium) amount of rest rather than a cash payment. Whether TOIL is allowed, and at what rate, depends on the contract and local rules.
Two worked examples
Take an employee whose normal hourly rate is 12 units of currency (a round figure chosen for the example). We will use a threshold of 40 hours per week, with time and a half (1.5x) and double time (2x) as illustrative multipliers.
Example 1, a 44-hour week. The employee works 4 overtime hours, all at 1.5x. Enhanced hourly rate: 12 × 1.5 = 18. Overtime pay: 4 × 18 = 72, compared with 48 at the plain rate. The premium therefore adds 24.
Example 2, a 50-hour week with two bands. Suppose the first 8 overtime hours are paid at 1.5x and anything beyond is paid at 2x. The employee works 10 overtime hours:
- 8 hours at 1.5x: 8 × 12 × 1.5 = 144.
- 2 hours at 2x: 2 × 12 × 2 = 48.
Total overtime pay for the week: 192, compared with 120 if the same 10 hours were paid at the plain rate. Always calculate band by band rather than applying a single blended multiplier to everything.
Careful
These figures are teaching examples, not official rates. The real amount depends on the contract, any collective agreement, the applicable law and how thresholds are defined. A banding error repeats on every payslip, so a properly configured payroll tool makes the calculation far more reliable.
Salaried, shift and part-time workers
The formula does not change, but two details often trip people up.
Salaried employees. You cannot apply a multiplier until you have an hourly rate. Convert the salary first: annual salary divided by annual paid hours gives the base rate, then apply the overtime multiplier to that. Note that some salaried roles are exempt from overtime rules altogether in certain countries (for example, some categories under US federal law), so check status before assuming a premium is due.
Part-time workers. Hours worked above a part-timer’s contracted schedule but still below the full-time threshold are frequently treated differently from full-time overtime, sometimes as ordinary “additional hours” at the plain rate. The exact treatment depends on the contract and local law.
A quick sense check
An employee doing roughly 4 extra hours a week across about 47 worked weeks builds up close to 188 overtime hours a year. Some countries cap annual overtime volume or add extra rest entitlements above a limit, so track the yearly total, not just the weekly one.
What varies from one country to another?
Because employment law is national, the same 44-hour week can be paid very differently depending on where the employee works. The main variables are:
- Whether a premium is mandatory. Some countries require a statutory minimum overtime rate; others (such as the UK) leave it to the contract, subject only to minimum-wage averaging.
- The threshold. The point at which overtime begins (weekly hours, daily hours, or both) is set locally or by agreement.
- Annual limits and rest. Caps on total overtime and mandatory rest or time-off entitlements differ widely.
- Tax treatment. How overtime pay is taxed, and whether any relief applies, is country-specific and changes over time.
The practical takeaway: the arithmetic is universal, but the inputs (multiplier, threshold, limits, tax) are not. Never copy a rate from one country to another. Confirm the rules with an official source or a qualified payroll adviser for the jurisdiction where the person is employed.
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Frequently asked questions
What is the formula to calculate overtime pay?
The core formula is: overtime hours × hourly rate × overtime multiplier. The hourly rate comes from the contract (or from dividing an annual salary by annual paid hours), and the multiplier, commonly 1.5x or 2x, comes from the contract, a collective agreement or local law. Calculate each band separately if different multipliers apply. These figures are indicative and not personalised advice.
What does time and a half mean?
Time and a half means the employee is paid 1.5 times their normal hourly rate for the overtime hours. For example, a normal rate of 12 becomes 18 per overtime hour. Double time (2x) works the same way at twice the rate and is often used for rest days or public holidays.
Is overtime pay legally required?
It depends on the country. Some jurisdictions require a statutory minimum overtime premium (for instance, at least 1.5x for hours over 40 a week for covered US employees). Others, such as the UK, have no legal minimum overtime rate, so pay is set by the contract, provided average pay does not fall below the minimum wage. Always check the rules where the person is employed.
How do I calculate overtime for a salaried employee?
First convert the salary into an hourly rate by dividing the annual salary by the annual paid hours (for example, 40 hours × 52 weeks = 2,080 hours in a common full-time pattern). Then apply the overtime multiplier to that hourly rate. Note that some salaried roles are exempt from overtime rules in certain countries, so confirm status first.
Can I give time off instead of paying overtime?
In some cases, yes. Many contracts and agreements allow time off in lieu (TOIL), where extra hours convert into equivalent or premium rest instead of cash. Whether TOIL is permitted, and at what rate, depends on the contract and local law, so check before offering it.