Managing employee leave and overtime pay is one of the more nuanced areas of workforce compliance. Employers must balance operational needs with a complex web of federal and state regulations that dictate when overtime must be paid—especially when employees take paid or unpaid leave during a workweek. Getting it wrong can lead to costly back-wage claims, penalties, and reputational damage. This article provides a comprehensive look at the legal rules, common pitfalls, and actionable best practices for handling overtime pay during leave periods.

The intersection of leave and overtime is fraught with misconceptions. Many employers assume that paying an employee for a day off automatically counts those hours toward the overtime threshold, while others mistakenly believe that any work performed during leave is voluntary and not compensable. Both assumptions are incorrect under the Fair Labor Standards Act (FLSA) and most state wage and hour laws. To stay compliant, organizations must understand the foundational principles and then layer on state-specific requirements that often go beyond federal mandates.

The foundation of overtime regulation in the United States is the Fair Labor Standards Act (FLSA), which requires covered employers to pay non-exempt employees one and one-half times their regular rate for all hours worked beyond 40 in a single workweek. However, the FLSA does not require employers to count paid leave hours—such as vacation, sick leave, or holidays—as “hours worked” for overtime calculations. This distinction creates the central challenge: correctly determining which hours count toward the overtime threshold when an employee is on leave during part of the week.

How the FLSA Defines “Hours Worked”

Under the FLSA, “hours worked” includes all time an employee is suffered or permitted to work. Time spent on paid leave, even if the employee is not actually working, is generally not considered hours worked. For example, if an employee takes two days of paid vacation and works three days for a total of 32 hours, the employer is not required to pay overtime because the employee did not exceed 40 hours of actual work. However, if that same employee works 30 hours during the three days and also performs any job-related tasks during the two leave days, those hours must be counted and could trigger overtime.

The definition of “suffered or permitted to work” is intentionally broad. The U.S. Supreme Court has held that even work the employer did not specifically request but allowed to continue must be counted. This principle applies squarely to leave periods: if an employee checks email or takes a work call while on vacation or sick leave, those minutes are hours worked and must be recorded. Employers who ignore such incidental work risk violating both overtime and recordkeeping provisions.

The Role of State and Local Laws

State laws can significantly modify or supplement the FLSA’s baseline requirements. Some states, like California, have daily overtime thresholds (e.g., overtime after 8 hours in a day) and more generous definitions of “hours worked.” Other states require paid sick leave or paid family leave, which may interact with overtime rules differently. For instance, California’s Paid Sick Leave Law requires employers to provide paid sick leave that accrues, but the interaction with overtime is nuanced: if an employee uses paid sick leave and also works, only actual work hours count toward the overtime threshold. However, California’s daily overtime rule means that working more than 8 hours in a single day—even if total weekly hours are under 40—can still trigger overtime for that day.

New York, on the other hand, has its own minimum wage orders and a state-level paid family leave program that may affect how leave is recorded for overtime purposes. Employers must check not only federal law but also the laws in every jurisdiction where they have employees. A good starting point is the U.S. Department of Labor’s state paid leave page and the National Conference of State Legislatures resource on paid sick leave. For California-specific guidance, the California Division of Labor Standards Enforcement (DLSE) provides opinion letters and enforcement policies.

The Family and Medical Leave Act (FMLA) and Overtime

The FMLA allows eligible employees to take up to 12 weeks of unpaid, job-protected leave per year for specified family and medical reasons. During FMLA leave, employees generally are not working, so no overtime is due. However, complications arise when an employee takes intermittent FMLA leave or works part-time while on reduced-schedule FMLA. In such cases, the employer must still track actual hours worked and pay overtime if the total exceeds 40 in the workweek. The DOL's FMLA page provides detailed guidance, but employers should note that the FMLA itself does not change the FLSA overtime rules—it only affects the leave entitlement.

Intermittent leave under the FMLA is a particularly tricky area. Suppose an employee is approved for intermittent leave for a chronic condition and takes two hours off each Friday for medical appointments. If during that workweek the employee works 38 hours plus the two hours of leave, no overtime is due. But if the employee works 39 hours and then takes the two hours of leave, they have still worked 39 hours—the leave time does not reduce the work hours. However, if they work 41 hours and take the two hours of leave, they have worked 41 hours and overtime is due on one hour. The employer must track actual work hours separately from leave hours to ensure compliance.

The distinction between paid and unpaid leave is critical for overtime compliance. Many employers mistakenly assume that paying an employee for a day off means those hours count toward the overtime calculation. In almost all cases, they do not—unless the employee actually performs work during that time.

When an employee takes paid leave and does not work, those hours are not counted as “hours worked” for FLSA overtime purposes. For example:

  • An employee works 32 hours and takes 8 hours of paid vacation: total paid is 40 hours, but only 32 hours worked, so no overtime.
  • An employee works 44 hours and also takes 8 hours of paid sick leave: the employee worked 44 hours, so overtime is due on the 4 hours over 40. The paid sick leave does not reduce the overtime obligation.

Employers should be careful with PTO policies that combine paid leave with actual work time in the same day. If an employee works 5 hours and then takes 3 hours of paid leave, only the 5 hours count as worked. But if the employee works 9 hours and then takes 1 hour of paid leave, they have still worked 9 hours—and if the workweek includes other days, the total may exceed 40. In states with daily overtime, the 9-hour day alone could trigger overtime for that day even if weekly hours remain under 40.

Unpaid Leave (FMLA, Personal Leave Without Pay)

During unpaid leave, the employee is not working and is not receiving wages for that time. Therefore, no overtime is owed for the leave period itself. However, if the employee performs any work—even checking email or taking a phone call—while on unpaid leave, those minutes or hours must be recorded and may create overtime liability if they push the week’s total over 40. This is a common area for unintentional violations, especially with remote workers or salaried non-exempt employees. Employers should have clear policies stating that no work is to be performed during unpaid leave, and any exceptions must be pre-approved and logged.

Fixed Workweeks and Fluctuating Workweeks

Some employers use a fixed workweek schedule where employees are expected to work a set number of hours, and leave is deducted from a PTO bank. Overtime calculations are straightforward: only actual hours worked matter. However, employers using the “fluctuating workweek” method (allowed under the FLSA) to pay overtime in certain circumstances must carefully follow DOL regulations regarding leave and payment. A change in leave status can affect the regular rate calculation for overtime. Under the fluctuating workweek method, an employee’s regular rate varies each week based on total hours worked and a fixed salary. If the employee takes unpaid leave, the salary may be reduced proportionally, which could in turn lower the regular rate and affect the overtime premium. Employers using this method should consult legal counsel to ensure compliance.

Recordkeeping Requirements and Documentation Best Practices

Accurate recordkeeping is the bedrock of overtime compliance. The FLSA requires employers to keep records of hours worked each day and each workweek, as well as the basis on which wages are paid. When leave is involved, additional documentation is wise.

  • Track actual work time separately from paid leave time. Use a timekeeping system that distinguishes between work hours and leave hours. Many modern systems allow employees to clock in and out for different activities, including different leave types.
  • Document the type of leave. Whether it’s FMLA, PTO, sick leave, or unpaid personal leave, annotate the timecard accordingly. This helps during audits and shows the employer’s intent to comply.
  • Retain all leave requests and approvals. These records support the classification of hours and can protect against claims that the employer encouraged off-the-clock work during leave.
  • Train employees to record all work time. Even a five-minute call during a leave day must be recorded if the employee is expected to be compensated for it. Create a culture where no work goes unrecorded.
  • Maintain records for at least three years. The FLSA requires retention for three years, but state laws may require longer. Check your jurisdiction.

The DOL Fact Sheet on overtime emphasizes that employers have the burden of proving they paid correctly. Inadequate records can lead to unfavorable inferences in wage disputes. In some cases, if an employer fails to keep accurate records, courts may accept the employee’s reasonable estimate of hours worked, which can be costly.

Even well-intentioned employers can stumble into violations when dealing with overtime and leave. Below are the most frequent mistakes.

Misclassifying Exempt vs. Non-Exempt Employees

Exempt employees (e.g., executive, administrative, professional) are not entitled to overtime pay under the FLSA. However, some employers incorrectly classify employees as exempt, then fail to pay overtime when those employees work while on leave. A common scenario: a salaried employee classified as exempt takes a week of paid vacation but also does some remote work. If the employee is actually non-exempt, the employer owes overtime for any hours over 40. Regular audits of exemption status are essential. See the DOL Fact Sheet on exemptions for criteria. Pay special attention to the “duties test” and salary basis requirements.

Treating Paid Leave as Hours Worked

Some employers mistakenly add paid leave hours to actual work hours to calculate overtime, believing they must pay overtime when total paid hours exceed 40. While this is generous, it is legally incorrect unless company policy or a collective bargaining agreement requires it. Doing so can inflate labor costs unnecessarily. Conversely, failing to count actual work done during leave is a clear violation. The correct approach: only actual work hours count toward overtime thresholds; paid leave hours are simply not included.

Intermittent Leave and Overtime Complications

Intermittent FMLA leave—where an employee takes leave in separate blocks of time for a single qualifying reason—poses special challenges. The employer must track actual hours worked each week. If the employee works 30 hours and takes 10 hours of intermittent leave, no overtime is due. But if the employee works 45 hours and also takes intermittent leave, overtime is due on the 5 hours over 40. Some policies try to prorate FMLA leave across multiple weeks, but that does not change the FLSA overtime obligation. Each workweek stands alone for overtime purposes.

A further complication arises when the intermittent leave is for a reason that also qualifies under state paid family leave laws. In states like New York, Washington, or Massachusetts, employees may receive paid benefits while on leave, but those payments are typically not wages for hours worked. The employer must still track the employee’s actual work hours carefully to determine if overtime is owed.

Failure to Pay Overtime on Work During Authorized Leave

Even with employer approval, if an employee works during leave, those hours must be compensated. If the employee works 30 hours at the office and then performs 12 hours of work from home while on paid sick leave, the employer must pay overtime for the 2 hours over 40 (and likely at the regular or overtime rate, depending on policy). Some employers mistakenly believe that because the employee is on leave, any work is voluntary and unpaid. This is almost always illegal under the FLSA. The only exception is for truly volunteer activities for a public agency or charitable organization under very narrow circumstances, which do not apply to standard employment.

On-Call Time During Leave

Another nuanced area is on-call time. If an employee is on leave but is required to remain on call and ready to work, that time may count as hours worked depending on the restrictions. The DOL uses a “predominantly benefit” analysis: if the employee is severely restricted (e.g., cannot leave home, must respond immediately), the on-call time is likely compensable. This can create overtime liability during a leave period if the employee is on call for many hours while also using leave. Employers should design on-call policies that respect leave status and avoid requiring employees to be simultaneously on leave and on call.

Best Practices for Compliance with Overtime and Leave Laws

To reduce litigation risk and promote fair treatment, employers should adopt the following practices.

Create a Clear Written Policy

Policies should explicitly state how overtime is calculated when an employee takes paid or unpaid leave. Include examples and definitions. For instance, “Overtime is paid for all hours actually worked in excess of 40 in a workweek. Paid leave hours are not counted toward the 40-hour threshold unless the employee performs work during the leave period.” Distribute the policy to all non-exempt employees and managers. Consider including a statement that any work performed during leave must be pre-approved and recorded, and that unauthorized work may result in discipline but must still be compensated.

Train Managers and HR Staff

Managers must understand that they cannot ask or allow employees to work off the clock while on leave. They should also know how to record any incidental work and when to escalate to HR. Regular training sessions—at least annually—help reinforce compliance. Role-play scenarios, such as an employee on sick leave who calls in to check email, to ensure managers respond correctly.

Use Integrated Timekeeping Systems

Modern time and attendance software can automatically distinguish between work hours and leave hours, flag potential overtime when work is logged during a leave day, and produce reports for audit. Ensure the system can handle multiple leave types and state-specific rules. Some systems allow for “mobile” time entry so employees can log work time even when working remotely during what would otherwise be leave time.

Conduct Regular Audits

Quarterly or biannual audits of payroll records for employees who took leave during the workweek can catch errors early. Compare time entries against leave approvals. If you find discrepancies, correct them and adjust wages promptly to avoid accumulative damages. Audits should also review exemption classifications, especially after promotions or job duty changes.

Because state and local laws vary widely—and because the interaction between different leave laws (FMLA, ADA, state family leave, workers’ compensation) can be intricate—it is wise to have an employment attorney review your policies and practices. This is especially important when implementing new leave programs or expanding to new states. Legal counsel can help draft policies that comply with the strictest applicable laws and reduce the risk of class-action lawsuits.

Recent Developments and DOL Guidance

The Department of Labor regularly issues opinion letters and rule changes that affect overtime and leave. For example, the DOL’s 2020 final rule on the “regular rate” clarified that certain benefits (like paid leave) do not need to be included in the regular rate calculation for overtime. Employers should monitor updates to ensure their practices align with current interpretations. The DOL Opinion Letters database is a useful resource for specific fact patterns. In 2023, the DOL issued a notice of proposed rulemaking on independent contractor classification, which could affect how certain workers on leave are treated. Staying informed through the DOL’s website and industry publications is recommended.

The Impact of Remote Work

With the rise of remote and hybrid work, employees are more likely to work during what would normally be leave time. Checking emails, attending virtual meetings, or finishing reports from home while on sick leave or vacation can create overtime liability. Employers should clearly communicate expectations: if an employee is on leave, they should not work, and if they must work, they must record the time and will be paid accordingly (including overtime if applicable). Consider implementing an “out of office” automatic email reply for employees on leave and deactivating access to work systems during approved leave periods to reduce the temptation to work.

Conclusion

Navigating overtime pay during employee leave requires a thorough understanding of the FLSA, state laws, and the nuances of different leave types. The core principle remains: only actual hours worked count toward overtime thresholds. Paid leave hours are not hours worked; unpaid leave hours are also not hours worked—unless the employee performs work during the leave. By maintaining accurate records, creating clear policies, training staff, and staying current with regulatory updates, employers can avoid costly mistakes and treat their workforce fairly. When in doubt, consult with legal counsel to tailor compliance strategies to your specific operations and jurisdiction. Proactive compliance not only minimizes legal risk but also fosters trust among employees who rely on accurate pay for their time both at work and during leave.