How to Calculate Overtime Pay: FLSA Rules, Rates, and Examples

Overtime pay exists to compensate employees fairly for hours worked beyond the standard workweek. If you are an hourly worker, a manager approving timesheets, or a small business owner running payroll, understanding overtime calculations is essential. Getting it wrong exposes employers to wage claims and leaves employees underpaid.

The Overtime Pay Formula

Under the Fair Labor Standards Act (FLSA), the standard overtime rate is 1.5 times your regular hourly wage, commonly called "time and a half." The formula is:

Overtime Pay = Overtime Hours x (Regular Hourly Rate x 1.5)

For example, if you earn $20.00 per hour and work 48 hours in a week:

• Regular pay: 40 hours x $20.00 = $800.00
• Overtime pay: 8 hours x $30.00 (time and a half) = $240.00
• Total gross pay: $1,040.00

Your effective hourly rate for that week works out to $21.67 ($1,040 / 48 hours), which is useful when comparing job offers or evaluating whether overtime is worth the extra effort. To convert a salary offer into an hourly rate for comparison, try our Salary to Hourly Converter.

The 40-Hour Threshold

Federal overtime law is straightforward: non-exempt employees must receive overtime pay for any hours worked beyond 40 in a single workweek. A workweek is a fixed, recurring 168-hour period (seven consecutive 24-hour days). Your employer defines when the workweek begins, and it does not have to start on Monday.

Key points about the 40-hour rule:

• Hours cannot be averaged across two or more weeks. Working 30 hours one week and 50 hours the next means you are owed 10 hours of overtime in the second week, even though you averaged 40.
• Holidays, sick days, and vacation time typically do not count toward the 40-hour overtime threshold unless your employer's policy says otherwise. Only hours actually worked trigger overtime.
• The overtime threshold applies per employer. If you work two separate jobs for two different employers, each tracks 40 hours independently.

Daily Overtime and Double Time

Several states impose overtime rules that go beyond the federal 40-hour weekly standard. California is the most notable example:

• Daily overtime (1.5x): Hours worked beyond 8 in a single day, regardless of weekly total.
• Daily double time (2x): Hours worked beyond 12 in a single day.
• Seventh consecutive day: The first 8 hours on the seventh consecutive workday in a workweek earn 1.5x, and hours beyond 8 earn 2x.

Alaska, Nevada, and Colorado also have daily overtime provisions, though the specific thresholds vary. Always check your state's labor laws, because state rules that are more generous to employees override federal minimums.

Exempt vs. Non-Exempt Employees

Not every worker qualifies for overtime. The FLSA classifies employees as either exempt or non-exempt:

• Non-exempt employees are entitled to overtime pay. Most hourly workers fall into this category.
• Exempt employees are not eligible for overtime. To qualify as exempt, an employee must generally meet all three conditions: be paid on a salary basis, earn above the salary threshold (currently $35,568 per year under federal law), and perform executive, administrative, or professional duties as defined by the Department of Labor.

Misclassifying employees as exempt to avoid paying overtime is one of the most common wage and hour violations. When in doubt, consult the Department of Labor's fact sheets or an employment attorney.

When You Need an Overtime Calculator

• Payroll processing. Calculating overtime manually for multiple employees across varying schedules invites errors. A calculator automates the math and separates regular from overtime pay.
• Budgeting for a project. If a project requires extended hours, estimating the overtime cost in advance helps you decide whether to approve overtime or hire temporary staff instead.
• Checking your paycheck. If your hours exceeded 40 last week but your paycheck does not reflect overtime pay, running the numbers yourself helps you identify discrepancies.

Common Mistakes to Avoid

• Applying the wrong multiplier. Time and a half (1.5x) is the federal default, but double time (2x) applies in specific situations in some states. Verify which rate applies before calculating.
• Ignoring daily overtime rules. If you work in California or another state with daily overtime, calculating only the weekly total will undercount overtime hours.
• Counting PTO toward the 40-hour threshold. Paid time off generally does not count as "hours worked" for overtime purposes under the FLSA, though some employer policies differ.
• Averaging hours across pay periods. Overtime is calculated per workweek, not per pay period. A biweekly paycheck still requires separate overtime calculations for each individual week.

Pro Tips

• Track daily hours, not just weekly totals. Even if your state only has weekly overtime, daily records make it easier to verify your pay and resolve disputes. Our Time Card Calculator makes it simple to log and total your daily hours.
• Know your state's rules. Federal law sets the floor, but your state may offer more protection. Check your state's Department of Labor website for specific overtime thresholds and exemptions.
• Calculate your effective hourly rate. Divide your total weekly pay (regular plus overtime) by total hours worked. This gives you a real picture of what you earn per hour, which is valuable when comparing job offers.
• Ask about comp time carefully. Private employers generally cannot offer compensatory time off in place of overtime pay under the FLSA. Government employers have more flexibility here, but the rules are strict.

Frequently Asked Questions

Is overtime pay mandatory?

For non-exempt employees, yes. The FLSA requires employers to pay overtime at 1.5x the regular rate for hours exceeding 40 in a workweek. Employers cannot waive this requirement, even with employee consent. State laws may add additional overtime obligations on top of the federal requirements.

Can my employer force me to work overtime?

In most states, yes. The FLSA does not limit the number of hours an adult employee can work in a week. Your employer can require overtime and discipline you for refusing, as long as they pay the correct overtime rate. Some union contracts and state laws provide additional protections around mandatory overtime.

How is overtime calculated for workers with multiple pay rates?

If you perform different tasks at different hourly rates within the same workweek, overtime is calculated using the weighted average of all rates. Add up total regular earnings from all rates, divide by total hours to get the weighted average, then multiply overtime hours by 1.5 times that average. This is called the "blended rate" method.