How Overtime Pay Is Calculated (And When Employers Get It Wrong)

Overtime pay sounds simple — work more than 40 hours, get 1.5x your rate. But between exempt vs. non-exempt classifications, different state laws, and the way fluctuating workweeks complicate everything, a lot of employees get shortchanged without realizing it. Here's what the math actually looks like and what you should be watching for on your paycheck.

Federal Overtime Basics: The FLSA Rules

The Fair Labor Standards Act requires employers to pay non-exempt employees at least 1.5 times their regular rate for hours worked over 40 in a workweek. The key phrase is "non-exempt" — salaried employees classified as exempt (typically executive, administrative, or professional workers earning above a salary threshold) aren't entitled to overtime under federal law.

For 2024, the federal exemption threshold is $684 per week ($35,568 annually). If you earn above that amount and meet the duties test for your classification, your employer can classify you as exempt and pay no overtime regardless of hours worked. The Biden administration attempted to raise this threshold significantly, but legal challenges have kept the rules in flux — worth checking current status if you're near that income line.

Calculating Regular Rate for Hourly Employees

For standard hourly workers, overtime is the easy case. Regular rate = hourly wage. Overtime rate = hourly wage × 1.5.

If you earn $19.50 an hour and work 47 hours in a week:

• Regular pay: 40 hours × $19.50 = $780
• Overtime pay: 7 hours × $29.25 = $204.75
• Total gross: $984.75

Straightforward. But here's where it gets less obvious: if your employer pays you a non-discretionary bonus — a production bonus, a shift differential, or any bonus tied to work performance — that bonus must be included in your regular rate before calculating overtime. Discretionary bonuses (holiday gifts, spot bonuses at management's sole discretion) can be excluded.

Salaried Non-Exempt Employees: The Trickier Calculation

This is where most people get confused. Some employees are paid a salary but are still non-exempt — meaning they're owed overtime. Retail managers below the salary threshold, administrative workers earning under $684/week, most hourly-paid workers converted to salary without a proper exemption analysis — these employees are entitled to overtime on top of their salary.

The regular rate for a salaried non-exempt employee: divide the weekly salary by the number of hours the salary is intended to cover (usually 40), then apply 1.5x for any hours above 40.

Say you're a store manager in Denver earning $620/week salary, working 50 hours. Your regular rate is $620 ÷ 40 = $15.50/hour. Your overtime rate: $23.25/hour. Overtime owed: 10 hours × $23.25 = $232.50 on top of your base salary. Total gross that week: $852.50.

Some employers try to get around this by saying the salary "covers all hours worked." That's not how the law works for non-exempt employees. If your employer is doing this, they may owe you back wages.

State Laws That Exceed Federal Requirements

Several states have overtime laws that are more generous than FLSA, and when state law provides greater protection, it takes precedence.

California is the most significant example: overtime kicks in after 8 hours in a single day (not just 40 hours in a week), at 1.5x rate. Work more than 12 hours in a day, and the rate jumps to 2x — double time. Also, California requires overtime on the seventh consecutive day of a workweek, at 1.5x for the first 8 hours and 2x beyond that.

Alaska, Nevada, Colorado, and several other states have similar daily overtime provisions. If you live in one of these states and work in spikes (long days rather than consistent 8-hour days), you may be owed significantly more than the federal minimum.

The Fluctuating Workweek Method (and Why to Watch For It)

Some employers use the "fluctuating workweek" or "half-time" method to reduce overtime costs. Under this approach, a salaried employee agrees to a fixed salary for all hours worked, however many that is. Overtime then only adds a half-rate premium on hours over 40 (not 1.5x, because the 1x is considered already paid by the salary).

This is legal under federal law in certain states, but requires a clear agreement with the employee and genuine week-to-week variation in hours. Several states have banned it outright. And many employers apply it improperly — using it even when hours are consistently over 40, which converts what should be a 1.5x overtime rate into a 1.5x payment spread across far more hours.

If your employer uses this method, double-check whether your state allows it and whether the conditions are actually being met.

How to Audit Your Own Paycheck

Keep your own hours. You don't have to be paranoid about it — just keep a simple log in your phone: days worked, start time, end time, any breaks. Cross-reference with your pay stub monthly. If you're consistently working overtime and not seeing it reflected in your gross wages, that's worth addressing.

Wage theft via overtime miscalculation is one of the most common labor violations in the U.S. The Department of Labor Wage and Hour Division investigates complaints at no cost to the employee. If you believe you're owed back overtime, the statute of limitations is two years under FLSA (three if the violation was willful), so it's worth raising sooner rather than later.