Work Hours Tracking and Overtime Rules: What Employers and Employees Should Know

The Foundation: The Fair Labor Standards Act

In the United States, federal overtime rules are established by the Fair Labor Standards Act (FLSA), originally passed in 1938 and substantially unchanged in its core overtime provisions since. The FLSA requires that covered, non-exempt employees receive overtime pay of at least 1.5 times their regular rate for all hours worked beyond 40 in a workweek.

The workweek under the FLSA is any fixed, regularly recurring period of 168 consecutive hours — seven consecutive 24-hour periods. Employers can set the workweek to start on any day of the week, but once established, the starting day must be fixed and consistently applied. Overtime is calculated separately for each workweek; hours cannot be averaged across weeks.

Who Is Covered: Exempt vs. Non-Exempt

Not all employees are covered by the FLSA overtime requirement. "Exempt" employees — primarily those in executive, administrative, and professional roles who are paid on a salary basis above a minimum threshold — are not entitled to overtime pay under federal law.

The exemption tests are more specific than most people realize. Executive exemption requires that the employee's primary duty is management, that they regularly direct two or more other employees, and that they have genuine authority over hiring or other personnel decisions. Being called a "manager" without satisfying these criteria does not make an employee exempt.

The salary threshold for most exemptions was increased by the Department of Labor in 2024. As of January 2025, the threshold is $684 per week ($35,568 annually) under the standard exemption. Employees paid below this threshold are generally non-exempt regardless of job title or duties.

State Overtime Laws

Many states have overtime rules that are more generous than federal law. California requires overtime pay for all hours worked beyond 8 in a single day (not just 40 in a week) and double time for all hours beyond 12 in a day. Alaska, Colorado, and Nevada have similar daily overtime provisions.

When state law provides greater benefits than federal law, the state law governs. California employers cannot use the federal 40-hours-per-week rule to avoid paying daily overtime; they must apply whichever standard results in more pay for the employee. Multi-state employers need to track daily and weekly hours separately and apply the appropriate state rules for each employee's work location.

What Counts as "Hours Worked"

The FLSA definition of hours worked is broader than time clocked in at a workstation. Time spent on preliminary and postliminary activities that are "integral and indispensable" to the principal activities of the job counts as work time. A nurse who must sanitize and put on specialized equipment before beginning patient care is working during the donning and doffing time.

Rest periods of 20 minutes or less generally count as paid work time. Meal periods of 30 minutes or more where the employee is completely relieved of duties do not count. Time employees spend "on call" at the workplace generally counts; time spent at home on call with few restrictions generally does not.

Travel time rules depend on the type of travel. Commuting from home to work does not count. Travel from job site to job site during the workday does. Overnight travel away from home that occurs during normal work hours counts; travel that occurs outside normal hours on a non-workday generally does not, with exceptions.

Recordkeeping Requirements

Covered employers must keep basic payroll records for at least three years and time records (the basis for pay calculations) for at least two years under the FLSA. Required records include: employee name, home address, and Social Security number; birth date if under 19; sex and occupation; time and day of week when the workweek begins; hours worked each day and total hours worked each workweek; total daily or weekly straight-time earnings; regular hourly pay rate; total overtime pay for the workweek; deductions from and additions to wages; total wages paid each pay period; and date of payment and the pay period covered.

The format of time records is flexible — paper timesheets, electronic time clocks, and digital logs all satisfy the requirement — as long as the information is accurate and accessible for inspection. Employers who rely on employee self-reported hours should have a process for supervisory review that creates an audit trail.

Common Payroll Errors

• Failing to count all time worked: pre-shift and post-shift activities, training time, and work performed outside official hours (including after-hours emails in some interpretations) can all be compensable.

• Averaging hours across workweeks: the FLSA calculates overtime within each discrete workweek. Two weeks of 30 and 50 hours do not average to 40 — the second week triggers 10 hours of overtime.

• Misclassifying employees as independent contractors: contractors are not covered by the FLSA, but the determination of contractor status depends on the actual work relationship, not the label on the contract. Misclassification is a significant source of FLSA litigation.

• Incorrect regular rate calculations: the regular rate for overtime purposes includes not just hourly wages but also non-discretionary bonuses, shift differentials, and commissions. Calculating overtime on base wage only while paying non-discretionary bonuses understates the overtime rate.

How Weekly Hours Calculators Support Compliance

A weekly work hours calculator that allows daily entry of start time, end time, and break duration provides a running total that makes overtime thresholds visible before a pay period closes. For non-exempt employees approaching 40 hours on a Thursday, a supervisor with real-time visibility can schedule Friday hours accordingly.

For employees, a personal hours tracker confirms that paychecks reflect actual hours worked and overtime is compensated correctly. When a paycheck looks wrong, precise time logs are the basis for a productive conversation with payroll or HR. Employees who cannot document their own hours are at a disadvantage in any dispute.

International Context

Overtime rules outside the United States vary widely. The European Working Time Directive limits the working week to 48 hours averaged over a reference period, with a right to at least 11 consecutive hours of rest per day and 24 consecutive hours of rest per week. Australia's Fair Work Act provides for overtime pay for hours beyond 38 per week for full-time employees, with penalty rates on weekends and public holidays that often exceed the FLSA's 1.5x requirement.

For companies with employees in multiple countries, tracking hours per employee and applying the correct jurisdiction's rules requires either a payroll system sophisticated enough to manage multiple rule sets or manual calculation verified against local law. Getting it wrong creates legal liability and employee trust issues in every affected country simultaneously.