Overtime Pay: How the Rules Work and How to Calculate It

Overtime rules vary significantly by country, state, and industry — but the core concept is consistent: non-exempt employees who work beyond a defined threshold in a given period receive a higher rate of pay. Understanding precisely how those thresholds and multipliers work protects employers from wage claims and ensures workers receive every dollar they've earned.

What Counts as Overtime?

In most countries, overtime is triggered when an employee works more than a set number of hours within a defined period — either a single day, a single workweek, or both. The two most common structures are:

• Weekly overtime: Hours beyond 40 in a workweek (standard in the US under the FLSA and common elsewhere).
• Daily overtime: Hours beyond 8 in a single day. California, for example, requires 1.5× pay after 8 hours and 2× pay after 12 hours in a day, in addition to the weekly threshold.

Some jurisdictions also require double-time pay for working on a public holiday, regardless of how many hours were worked that week. Always verify the exact rules for every region in which you employ people.

Pay Multipliers Explained

The most common overtime rates are:

• 1.5× (time-and-a-half): The standard for the first band of overtime hours in most jurisdictions.
• 2× (double time): Applied after exceptionally long shifts, on rest days, or on public holidays depending on local law or employment contract.
• 1.25× or other contract rates: Some collective agreements specify a lower premium for the first few overtime hours. Contract terms can be more generous than statute but cannot be less generous.

Exempt vs. Non-Exempt Employees

Not every worker is entitled to overtime. "Exempt" classifications — salaried executives, managers, certain professionals, and high earners above a wage threshold — are excluded from overtime requirements in many legal frameworks. In the US, for instance, the FLSA salary-basis test requires that a worker earn at least $684 per week (as of 2024) on a guaranteed salary rather than an hourly basis to be potentially exempt.

Misclassification is one of the most common and costly wage-and-hour violations. If you're unsure whether a worker qualifies for exempt status, seek legal guidance — the employer bears the burden of proof and penalties for misclassification can include back pay, damages, and legal fees.

Calculating the Regular Rate of Pay

Overtime is calculated on the regular rate of pay, which is not always the same as the base hourly wage. Non-discretionary bonuses, shift differentials, and certain commissions must be included in the regular rate before overtime is calculated. To find the regular rate for a given workweek:

1. Add all compensation earned that week (base wages + non-discretionary bonuses + shift differentials).
2. Divide by total hours worked (including overtime hours).
3. The result is the regular rate. Overtime is then calculated at 1.5× this rate for overtime hours.

Example: An employee earns $600 in base wages (40 hours × $15/h) plus a $100 production bonus in a week where they worked 45 hours. Regular rate = ($600 + $100) ÷ 45 = $15.56/h. Overtime premium = 5 hours × ($15.56 × 0.5) = $38.90 in additional pay, so total compensation = $700 + $38.90 = $738.90.

The Half-Time vs. Full Overtime Method

You may encounter two equivalent ways to express the overtime calculation:

• Full overtime method: Pay overtime hours at 1.5× the regular rate. In the example above, 5 overtime hours × ($15.56 × 1.5) = $116.70 in overtime pay, added to regular hours pay of (40 × $15.56) = $622.40, total $739.10 (slight rounding difference from the half-time method).
• Half-time method: Pay all hours, including overtime, at the regular rate upfront, then add a 0.5× premium for overtime hours. This is common when overtime hours are already included in a salary calculation.

Both methods produce the same total if applied consistently. The half-time method is typically used when an employee's compensation structure includes a fixed salary covering all hours worked.

Overtime for Varying Hourly Rates (Blended Rate)

Employees who work at different hourly rates during the same workweek — for example, $14/h on regular duties and $18/h on specialist tasks — require a blended (weighted average) regular rate calculation:

1. Total earnings = (hours at rate A × rate A) + (hours at rate B × rate B).
2. Total hours worked = hours at rate A + hours at rate B.
3. Blended regular rate = Total earnings ÷ Total hours worked.
4. Overtime premium = Overtime hours × (Blended rate × 0.5).

Salaried Non-Exempt Employees

Not all salaried employees are exempt. If a salaried worker does not meet the duties or salary-level tests for exemption, they are still owed overtime. To find their regular rate, divide their weekly salary by the number of hours it is intended to cover (usually 40), then apply the standard overtime premium for hours beyond threshold.

Record-Keeping and Compliance

Keep accurate records of every employee's start time, end time, and total hours worked each day. Retain these records for at least three years. Employers should also document the classification basis for each exempt employee and review it whenever job duties change — reclassification is a common audit trigger.

Simplify the Maths

CalcTap's Overtime Calculator handles the heavy lifting. Enter regular hours, overtime hours, hourly rate, and overtime multiplier and get gross pay broken down into regular and overtime components in seconds. It also supports the blended-rate scenario and double-time thresholds.