How to Calculate Time and a Half (With Examples)

Time and a half is the most common overtime rate in the world of hourly work. The name is literal: you are paid your regular hourly wage plus half of that wage again, which works out to 1.5 times your normal rate. It usually kicks in once you work more than a set number of hours in a week, and it can make a real difference to a paycheck. The maths is simple once you see it laid out, so let us walk through the formula, several worked examples, and the mistakes that trip people up.

What does time and a half actually mean?

Time and a half means you receive 150 percent of your regular pay for each qualifying overtime hour. Think of it as two pieces stacked together: the normal "time" you would always earn, plus an extra "half" on top as a bonus for the overtime. So for every overtime hour you get one full hour of pay plus half an hour of pay. Combine them and a single overtime hour is worth 1.5 normal hours.

In the United States, the federal Fair Labor Standards Act requires time and a half for most hourly employees who work more than 40 hours in a single workweek. Many other countries and individual employment contracts use a similar 1.5 multiplier. The exact rules vary, but the calculation itself is identical wherever the 1.5 rate applies.

The time and a half formula

There are really just two short formulas to remember. The first gives your overtime hourly rate, and the second turns that into total overtime pay.

If you would rather not multiply by 1.5 in your head, there is an easy shortcut: take half of your hourly rate and add it to the full rate. Half of 20 is 10, and 20 plus 10 is 30. You land on exactly the same overtime rate either way. This is the same kind of "multiply then add" trick used when you learn how to calculate a percentage.

Worked example: step by step

Suppose Maria earns 20 per hour and works 46 hours one week. The first 40 hours are paid at her normal rate, and the 6 hours over 40 are paid at time and a half. Here is how to work out her pay from start to finish.

1. Find the overtime rate. Multiply the hourly rate by 1.5: 20 times 1.5 equals 30 per overtime hour.
2. Count the overtime hours. Maria worked 46 hours, so 46 minus 40 leaves 6 overtime hours.
3. Calculate overtime pay. Multiply the overtime rate by overtime hours: 30 times 6 equals 180.
4. Calculate regular pay. Multiply the normal rate by the first 40 hours: 20 times 40 equals 800.
5. Add them together. Total pay is 800 plus 180, which equals 980 for the week.

Without overtime, 46 normal hours would have paid 920. The 1.5 multiplier added 60 extra for the same 6 hours of work, which is exactly the "half" portion of time and a half doing its job. Notice that the extra 60 is simply 6 overtime hours times the 10 bonus per hour, so you can always sanity check an overtime calculation by isolating the half portion on its own.

Here is a second quick example to lock in the pattern. Say James earns 18 per hour and works 50 hours. His overtime rate is 18 times 1.5, which is 27 per hour. He has 50 minus 40, or 10 overtime hours, so his overtime pay is 27 times 10 equals 270. Add his regular pay of 18 times 40 equals 720, and his weekly total is 990. The structure never changes no matter the numbers: regular hours at the base rate, plus overtime hours at 1.5 times the base rate.

Time and a half rate chart

The chart below shows common hourly rates and their time and a half equivalent. To get any overtime rate yourself, just multiply the rate in the left column by 1.5.

Time and a half compared with other overtime rates

Time and a half sits in the middle of a small family of overtime multipliers. Once you know how the 1.5 rate works, the others follow the exact same pattern with a different number. The table below puts them side by side using a 20 per hour base rate so you can see how each multiplier changes a single hour of pay.

Most workweeks only ever involve straight time and time and a half. Double time and the higher rates tend to show up in specific situations such as designated holidays, the seventh consecutive workday, or hours worked far beyond a long shift. Always confirm which multiplier applies before you calculate, because using the wrong one is the single biggest source of payroll disputes.

Time and a half for salaried workers

Salaried employees can still be owed time and a half if they are classified as non exempt. The trick is to first convert the salary into an hourly rate, then apply the same 1.5 multiplier.

• Find the annual salary and divide it by 52 to get weekly pay.
• Divide weekly pay by the normal weekly hours (often 40) to get the regular hourly rate.
• Multiply that hourly rate by 1.5 to get the overtime rate.

For example, a 41,600 yearly salary is 800 per week, which is 20 per hour across 40 hours. That makes the overtime rate 30 per hour, the same figure from our earlier example. If you want to check pay across longer periods, it helps to know how many hours are in a week so your conversions stay consistent.

Common mistakes to avoid

Time and a half is simple arithmetic, but a few recurring errors lead to underpaid or overpaid weeks. Watch for these.

• Applying 1.5 to every hour. Only the overtime hours get the higher rate. The first 40 hours stay at the normal rate.
• Multiplying by 0.5 instead of 1.5. Half the rate is only the bonus portion, not the full overtime rate. You still owe the base hour too.
• Forgetting to define the overtime threshold. In most US jobs overtime starts after 40 hours in a week, not after 8 hours in a day, unless a state or contract says otherwise.
• Rounding too early. With rates like 15 that become 22.50, round only at the final total to avoid small errors creeping in.
• Ignoring double time. Some rules pay double time (2 times) past a higher threshold. That is a different multiplier, not time and a half.

Good to know

Time and a half is the default, but it is not the only overtime rate. Double time pays 2 times the normal rate and sometimes applies on holidays or after very long shifts. Understanding the multiplier is the key to all of them: once you can confidently turn a rate into 1.5 times itself, switching to a 2 times calculation is trivial. The same comfort with multipliers pays off elsewhere too, such as when you work through how compound interest grows over time.

Keeping an accurate record of hours worked matters just as much as the formula. If your hours are logged in start and end times, a time duration calculator can total them before you apply the overtime rate, so the multiplication starts from the right number.