How to Calculate Overtime Pay Under Federal and State Regulations

Calculating overtime pay accurately is a critical responsibility for any employer and a right that employees should understand. Miscalculating overtime can lead to costly lawsuits, Department of Labor penalties, and damaged employee trust. Both federal and state laws govern overtime, and the rules often differ or overlap. This expanded guide provides a thorough breakdown of how to calculate overtime pay under federal and state regulations, including real-world examples, common pitfalls, and best practices to keep your payroll compliant.

Federal Overtime Regulations Under the FLSA

The Fair Labor Standards Act (FLSA) sets the national baseline for overtime pay in the United States. Enforced by the U.S. Department of Labor’s Wage and Hour Division, the FLSA requires that non-exempt employees receive overtime pay at a rate of at least one and one-half times their regular rate of pay for all hours worked over 40 in a single workweek. Understanding the mechanics of this rule is the first step to accurate payroll processing.

Who Is Exempt and Non-Exempt?

Not all employees qualify for overtime under the FLSA. The law classifies workers as either exempt or non-exempt based on their job duties, salary level, and salary basis. Executive, administrative, professional, outside sales, and certain computer employees may be exempt if they meet specific tests. For 2025, the standard salary threshold for most exemptions is $1,128 per week ($58,656 annually), though this figure adjusts periodically. Employees earning below this amount are almost always non-exempt and entitled to overtime. Employers must carefully classify each role to avoid costly misclassification claims.

Understanding the Regular Rate of Pay

The regular rate of pay is not simply the hourly wage. It is the average hourly rate earned during the workweek, including certain compensation beyond base pay. The FLSA defines the regular rate as all remuneration for employment divided by total hours worked. This includes:

  • Hourly wages or salary
  • Non-discretionary bonuses (e.g., attendance bonuses, production bonuses)
  • Commissions
  • Piece-rate earnings
  • Shift differentials
  • Cost of living adjustments

Excluded from the regular rate are discretionary bonuses, gifts, benefit plan contributions, and reimbursed expenses. When calculating overtime, you must recalculate the regular rate each workweek if additional forms of pay are involved.

How to Calculate FLSA Overtime – Step by Step

  1. Determine the workweek. A workweek is a fixed, recurring period of 168 hours (7 consecutive 24-hour days). Employers can choose when the workweek starts, but it must be consistent.
  2. Record total hours worked. Count all hours an employee actually works, including time worked off-site if authorized, short breaks (less than 20 minutes), and on-call time that restricts personal freedom.
  3. Compute the regular rate of pay. Add all compensation for the week and divide by total hours worked. For a salaried non-exempt employee earning $800/week for 40 hours, the regular rate is $20/hour. If that same employee works 48 hours, the regular rate becomes $800 ÷ 48 = $16.67/hour, and overtime must be paid at 1.5 times that rate.
  4. Identify overtime hours. Only hours over 40 in the workweek qualify for overtime under the FLSA. Some states have daily overtime thresholds, which we cover below.
  5. Calculate overtime pay. Multiply overtime hours by 1.5 times the regular rate.
  6. Add to regular pay. The regular pay includes straight-time pay for all hours (including overtime hours at straight time) plus the overtime premium (the extra 0.5).

Example: Hourly Employee with a Bonus

A non-exempt employee earns $18/hour and works 44 hours in a week. She also receives a $50 non-discretionary production bonus for the week.

  • Regular weekly earnings: 44 hours × $18 = $792
  • Plus bonus: $792 + $50 = $842 total straight-time compensation
  • Regular rate: $842 ÷ 44 hours = $19.14/hour
  • Overtime hours: 4 hours
  • Overtime premium: 4 × ($19.14 × 0.5) = $38.28 (the extra half-time)
  • Total pay: $842 + $38.28 = $880.28

Note that the regular rate changed because of the bonus. Many employers mistakenly pay overtime only on the base hourly wage, which can result in underpayment and legal liability. The U.S. Department of Labor’s overtime page provides official fact sheets and examples.

State Overtime Regulations – When State Law Differs from Federal

While the FLSA sets a floor, many states impose stricter overtime requirements. When state and federal laws conflict, employers must apply the standard that is more favorable to the employee. This often means paying overtime based on state thresholds that go beyond the 40-hour week. Some states require daily overtime after 8 or 12 hours, double-time for excessive hours, or lower exemption salary thresholds. Ignoring state-specific rules is one of the most common payroll compliance errors.

Daily Overtime Requirements

A number of states require overtime for hours worked beyond a certain number in a single day, regardless of the weekly total. The most notable example is California, where non-exempt employees earn overtime for:

  • Hours worked over 8 in a day, at 1.5 times the regular rate
  • Hours worked over 12 in a day, at 2 times the regular rate (double time)
  • First 8 hours on the seventh consecutive day of work in a workweek, at 1.5 times
  • Hours over 8 on the seventh consecutive day, at double time

Other states with daily overtime rules include Alaska (8 hours/day in certain industries), Colorado (12 hours/day or 40 hours/week, whichever is greater), Nevada (8 hours/day if the employee earns less than 1.5 times the minimum wage), and Kentucky (8 hours/day in certain manufacturing). In these states, you must calculate overtime using the daily threshold even if the employee’s weekly total is under 40 hours.

Example: California Daily Overtime

An employee in California earns $22/hour and works 10 hours on Monday, 8 hours Tuesday through Thursday, and 9 hours on Friday (total 43 hours).

  • Daily overtime: Monday – 2 hours over 8; Friday – 1 hour over 8
  • Total daily overtime: 3 hours at 1.5× rate = 3 × $33 = $99
  • Weekly overtime: 43 – 40 = 3 hours at 1.5× rate. But these hours are already counted as daily overtime in California? Actually, California requires the employer to pay the greater of daily or weekly overtime. Daily overtime usually takes precedence. The weekly calculation would also produce 3 overtime hours, but since daily overtime covers those same hours, the daily method applies. If an employee had 2 hours of daily overtime and also 5 hours of weekly overtime (e.g., 45 hours with no day over 8), you'd pay both separately. The key is to compute each workweek and apply the most beneficial rule.
  • Straight-time pay: 43 hours × $22 = $946
  • Overtime premium: 3 hours × $11 = $33 (extra half-time)
  • Total: $979

California also requires double-time after 12 hours in a day and for hours over 8 on the seventh day. The California Division of Labor Standards Enforcement (DLSE) provides detailed guidance. See the California DLSE overtime FAQs for more information.

States with Alternative Overtime Thresholds

Some states use different weekly thresholds. For instance, Colorado requires overtime after 12 hours in a workday or 40 hours in a workweek (whichever is greater), but not after 8 hours per day unless the employer and employee agree to an alternative workweek schedule approved by the state. New York does not have daily overtime except for certain manufacturing and restaurant workers, but its overtime exemption salary threshold is higher than the federal level (currently $1,200/week in NYC and $1,152/week elsewhere in the state as of 2025). Oregon has daily overtime for certain industries. Employers with multi-state operations must comply with each state’s Department of Labor. The SHRM state overtime chart is a useful starting point.

Double Time and Special Rates

Beyond California, double-time rules exist in a few states. For example, in Nevada, after 12 hours in a workday, employees must be paid double-time if they are in certain industries. In Alaska, work over 8 hours on the seventh consecutive day is double-time. Understanding these nuances is vital for payroll accuracy.

Common Pitfalls in Overtime Calculation

Even with clear rules, payroll errors happen frequently. Below are the most common mistakes and how to avoid them.

1. Misclassifying Employees as Exempt

Classifying a non-exempt employee as exempt to avoid overtime is a leading cause of wage theft lawsuits. The FLSA duties test and salary level test must both be met. State laws may have stricter tests (e.g., California’s salary threshold is $68,640 per year as of 2025). Employers should conduct a formal exemption review annually and document the rationale.

2. Using the Wrong Workweek

Overtime is calculated per workweek, not per pay period. If an employee works 50 hours one week and 30 the next, the employer cannot average the two (50+30=80÷2=40) to avoid overtime. The employee must be paid 10 hours of overtime for the first week. The workweek must be consistent; changing it mid-cycle without valid reason violates FLSA.

3. Failing to Include All Compensation in the Regular Rate

As shown earlier, bonuses, commissions, and shift differentials affect the regular rate. Many payroll systems only pay overtime based on base hourly rate. This can lead to underpayment penalties. The DOL’s Fact Sheet #23 explains which payments must be included.

4. Improper Rounding of Time

The FLSA allows rounding of time punches to the nearest 5, 6, or 15 minutes, provided the rounding does not consistently undercount employees’ time. If rounding always rounds down, it violates the law. The DOL has issued enforcement guidelines on rounding.

5. Ignoring State Law When It’s More Generous

Employers operating in states with daily overtime or higher salary thresholds must apply the state law. Federal law provides a base, but state law may demand more. For example, a company in Colorado must pay overtime after 12 hours in a day even if the weekly total is under 40, something the FLSA does not require. Multi-state employers need a compliance matrix by location.

Best Practices for Overtime Compliance

Proactive measures can reduce risk and improve payroll accuracy.

Maintain Accurate Time Records

The FLSA requires employers to keep records of hours worked, including start and end times, total daily and weekly hours, and pay basis. These records must be retained for at least three years. Time-tracking software or physical time cards should capture all work time, including off-the-clock tasks. Inaccurate timekeeping can lead to default judgments in wage claims.

Train Managers and Payroll Staff

Supervisors must understand that asking employees to work off the clock or pre-approving overtime without tracking it is illegal. Training should cover how to handle meal breaks, travel time, and training sessions. Regular audits of payroll calculations for a sample of employees each month can catch errors early.

Use a Reliable Payroll System

Manual overtime calculations are error-prone. Use payroll software that can handle multiple overtime rules, including daily and weekly thresholds, and automatically compute blended regular rates when bonuses are paid. Major payroll platforms like ADP, Gusto, and Paychex offer state-specific overtime compliance features. However, always double-check the system’s logic for your jurisdiction.

Establish Clear Overtime Policies

Publish a written overtime policy that states: overtime must be authorized in advance; all hours worked must be recorded; working off the clock is prohibited; and violations may result in discipline. This policy helps prevent unauthorized overtime and provides a defense against claims.

Stay Updated on Regulatory Changes

Overtime salary thresholds are updated periodically by the DOL. For example, in 2024 the DOL proposed increasing the standard salary level to $1,128 per week (effective July 1, 2024) with further increases planned. State thresholds also change. Subscribe to newsletters from your state labor department and consult with employment counsel annually.

Conclusion

Calculating overtime pay correctly requires understanding both the federal FLSA framework and the specific state laws where employees work. The regular rate of pay must include all non-discretionary compensation, and overtime must be paid at 1.5 times (or double, where applicable) for the greater of daily or weekly thresholds. Common mistakes like misclassification, incorrect inclusion of bonuses, and failure to apply state rules can be expensive. By keeping meticulous records, training payroll staff, and using compliant payroll systems, employers can ensure fair pay and avoid penalties. Every organization should periodically audit its overtime practices and consult the DOL Wage and Hour Division or a qualified employment attorney to stay compliant in an evolving regulatory landscape.