How overtime pay actually works under federal law

Most arguments about overtime come down to two misunderstandings: that the rule is about long days, and that the multiplier applies to the wage on the contract. Neither is right, and both cost people money.

The rule is weekly

Under the Fair Labor Standards Act, a non-exempt employee is owed at least one and a half times their regular rate for hours worked over 40 in a workweek. That is the whole federal test. It says nothing about how those hours are distributed.

Four ten-hour days is forty hours. It is a hard week, and it carries no federal overtime. Five nine-hour days is forty-five hours, and the last five are owed at time and a half. The difference is the weekly total, not the length of any day.

This is why a calculator with an "hours per day" field can quietly mislead you: it implies a daily rule that federal law does not contain.

The workweek is fixed in advance

A workweek is a fixed, recurring period of 168 hours — seven consecutive 24-hour periods. The employer chooses when it starts, and it does not have to align with the calendar week or the pay period.

What the employer cannot do is move it around to avoid a premium, or average two weeks together. Sixty hours one week and twenty the next is not two forty-hour weeks. It is twenty hours of overtime in the first week and a short second week.

The multiplier applies to the regular rate

This is the part that gets missed. The 1.5x is not applied to the base wage; it is applied to the regular rate, which includes most of what you were paid for that week:

• non-discretionary bonuses, including attendance and production bonuses
• shift differentials for nights, weekends or undesirable shifts
• commissions
• the value of certain other compensation tied to the work

Genuinely discretionary gifts — the kind the employer is under no obligation to pay and does not announce in advance — are excluded.

The practical consequence: if you earned a shift differential in a week where you also worked overtime, your overtime rate should be higher than 1.5 times your base wage. Overtime computed on the base wage alone underpays you, and it is a common payroll error rather than a rare one.

There is no federal double time

Double time exists, but it comes from a state law, a union agreement or an employment contract. Federal law does not require it at any number of hours.

Several states also add daily rules on top of the federal weekly one. California is the most commonly cited: overtime past eight hours in a day, double time past twelve, and a separate rule for the seventh consecutive day worked. The rules that apply are the ones for the state where the work is performed, not where the employer is based.

Exempt does not mean salaried

Being paid a salary does not by itself remove your right to overtime. Exemption generally requires three things together: payment on a salary basis, a salary at or above the applicable threshold, and duties that genuinely fit an executive, administrative, professional, outside sales or certain computer roles.

The salary threshold has changed and been litigated in recent years, so check the current figure with the Department of Labor rather than relying on a number you read somewhere. What has not changed is the principle: a title on a contract does not decide it, and neither does the method of payment. The duties do.

What to check on your own payslip

1. Add up the hours in the workweek your employer has defined, not the pay period.
2. Anything past 40 should appear at no less than 1.5 times the regular rate.
3. If you earned a bonus or differential that week, the regular rate should be higher than your base wage, and the overtime rate higher still.
4. If two weeks were averaged to bring one of them under 40, that is not allowed.

If something does not add up, the Department of Labor's Wage and Hour Division handles complaints, and state labor agencies handle state rules.