What the FLSA actually requires, and what it does not
Section 7(a) of the Fair Labor Standards Act requires that a non-exempt employee receive at least one and a half times the regular rate for every hour worked beyond 40 in a workweek. Three parts of that sentence do the work, and each is a common point of failure.
"Regular rate" is a computed figure, not a contract term. It is all remuneration for employment in the week divided by the hours worked, with a short list of statutory exclusions. Your posted hourly rate is only the regular rate when nothing else is paid.
"Workweek" means a fixed and regularly recurring period of 168 hours — seven consecutive 24-hour periods. It may start any day and any hour, but once fixed it cannot be changed to dodge overtime. Each workweek stands alone: 30 hours one week and 50 the next produces 10 hours of overtime, and no amount of averaging across a biweekly pay period removes it.
"Hours worked" means time actually on duty. Paid holiday, vacation and sick leave are not hours worked, so a week of 32 worked hours plus 8 holiday hours generates no overtime even though the paycheck shows 40. The act sets no ceiling on hours for adults, requires no premium for nights, weekends or holidays as such, and does not regulate overtime for exempt employees at all.
What the FLSA sets is a floor. States may require more and several do: California and a handful of others require daily overtime after 8 hours and double time after 12, and Alaska, Nevada and Colorado each have their own daily rules. Where federal and state law differ, the employee gets the more generous outcome.
Why the premium is half-time, and what goes into the denominator
The arithmetic looks strange the first time. If overtime is time and a half, why does the calculator add only a half-time premium?
Because the straight-time component is already paid. When you multiply all 46 hours by the base rate you have paid 1.0× on every hour including the overtime ones. What remains owing is the extra 0.5×, applied to the six hours past 40. Adding 1.5× on top of the full 46 hours would pay 2.5× for overtime work. The two routes agree whenever no bonus is involved: 40 × 20 + 5 × 30 = 950, and 45 × 20 + 0.5 × 20 × 5 = 950.
The routes stop agreeing the moment anything other than the hourly rate is paid, and that is why the regular rate exists. 29 CFR Part 778 requires that almost all remuneration be included: nondiscretionary bonuses of every kind (attendance, production, safety, retention, quality), commissions, shift differentials, on-call pay, hazard pay, and the reasonable cost of certain board and lodging. The list of exclusions in section 7(e) is short and specific: genuinely discretionary bonuses where both the fact and the amount are decided at the employer's sole discretion near the end of the period, gifts, payments for time not worked such as holiday and vacation pay, reimbursed expenses, contributions to bona fide benefit plans, and the premium portion of pay that is already at a premium rate.
Note the direction of the effect that surprises people. A fixed weekly bonus raises the regular rate by bonus ÷ hours, and because the same bonus is divided by more hours as the week gets longer, the regular rate falls as hours rise. A $46 bonus on 46 hours adds $1.00 to the regular rate; the same $46 on 92 hours would add only $0.50. The reference table below shows this directly.
Percentage-of-earnings bonuses are the exception worth knowing: a bonus stated as a fixed percentage of total earnings including overtime already increases straight-time and overtime pay proportionately, so no recomputation is required.
Worked example: 46 hours at $10 with a $46 production bonus
An employee works 46 hours in one workweek at a posted rate of $10.00 per hour and earns a $46.00 production bonus for that week. The bonus is nondiscretionary — it was promised in advance for hitting a target.
- Hourly earnings. 46 h × $10.00 = $460.00.
- Total straight-time earnings. 460.00 + 46.00 bonus = $506.00.
- Regular rate. 506.00 ÷ 46 h = $11.00 per hour. Note that this exceeds the posted $10.00 rate by exactly 46 ÷ 46 = $1.00.
- Overtime hours. 46 − 40 = 6 hours.
- Premium rate. (1.5 − 1) × 11.00 = $5.50 per overtime hour.
- Overtime premium. 5.50 × 6 = $33.00.
- Total gross for the week. 506.00 + 33.00 = $539.00.
Compare that against the shortcut an employer might reach for: 40 × 10 + 6 × 15 + 46 = 400 + 90 + 46 = $536.00. Computing the premium on the posted rate rather than the regular rate underpays by $3.00, which is exactly 0.5 × $1.00 × 6 hours. That is a small number for one week and a large one across a workforce and a two-year lookback period — and the FLSA's default remedy for unpaid overtime is the back pay plus an equal amount as liquidated damages, so the exposure is $6.00 per employee-week, not $3.00.
Check the effective hourly rate as a sanity test: $539.00 ÷ 46 h = $11.72 per hour worked, comfortably above the $11.00 regular rate and below $11.00 × 1.5. Any effective rate outside that band means an input is wrong.
How a fixed weekly bonus changes the regular rate
| Hours worked | Straight-time earnings | Regular rate | OT hours | Premium owed | Total gross |
|---|---|---|---|---|---|
| 40 | $860.00 | $21.5000 | 0 | $0.00 | $860.00 |
| 44 | $940.00 | $21.3636 | 4 | $42.73 | $982.73 |
| 48 | $1,020.00 | $21.2500 | 8 | $85.00 | $1,105.00 |
| 52 | $1,100.00 | $21.1538 | 12 | $126.92 | $1,226.92 |
| 56 | $1,180.00 | $21.0714 | 16 | $168.57 | $1,348.57 |
| 60 | $1,260.00 | $21.0000 | 20 | $210.00 | $1,470.00 |
The regular rate declines toward the $20.00 base as hours rise, because the fixed $60 is spread thinner. It never reaches $20.00 while the bonus is positive. Premium = 0.5 × regular rate × OT hours.
Reading the result, and checking a paycheck against it
Start with the regular rate. If it equals your posted hourly rate, nothing beyond hourly wages was paid this week and the rest of the calculation is straightforward. If it is higher, something else entered the denominator, and any overtime computed on the posted rate is short.
Then check the premium against the simple bound: the overtime premium for a time-and-a-half week can never exceed half the regular rate times the overtime hours, and can never be less than zero. If a stub shows an "overtime" line equal to 1.5 × rate × OT hours, that is fine as long as the straight-time line covers only 40 hours — employers split the total either way, and both presentations are legal. What matters is the total.
Three patterns should prompt a closer look. First, an overtime line that appears only in weeks with no bonus suggests the payroll system is not recomputing the regular rate when incentives are paid. Second, hours averaged across a two-week pay period — 45 one week and 35 the next reported as 80 straight-time hours — is not permitted; you are owed 5 hours of premium. Third, comp time in place of overtime pay is lawful for public sector employers under section 7(o) and generally unlawful for private ones.
If the pay is salaried but non-exempt, the regular rate is the weekly salary divided by the hours the salary is intended to cover, and the premium is owed on top. If your employer uses the fluctuating workweek method under 29 CFR 778.114, the salary covers all hours worked and only a half-time premium is due on the overtime hours, with the regular rate falling as hours rise — a materially different result that requires a clear mutual understanding and a fixed salary. To convert a salary into an hourly figure for the ordinary case, use the salary to hourly rate calculator; where an employee works two different jobs at two rates for the same employer, the blended overtime rate calculator handles the weighted-average rate that applies.
Exempt status is about duties and salary, not about job title
Overtime is owed to every employee who is not exempt, and exemption is narrow. The white-collar exemptions in 29 CFR Part 541 require that the employee be paid on a salary basis at or above a threshold amount and that the employee's primary duty fit the executive, administrative, professional, computer or outside sales test. A salary alone does not create exemption, and neither does calling someone a manager or a coordinator. Classification disputes are the largest source of FLSA liability by value, and misclassification exposes an employer to two or three years of back overtime plus liquidated damages. If you are unsure of a classification, check the duties tests rather than the title.
Mistakes that produce the wrong overtime figure
- Computing the premium on the base rate when a bonus was paid. The premium must use the regular rate, which the bonus raises.
- Averaging hours across a two-week pay period. Each workweek stands alone. A 45/35 fortnight owes 5 hours of premium even though the total is 80.
- Counting paid leave as hours worked. Holiday, vacation and sick pay are excluded from both hours worked and the regular rate, so 32 worked hours plus 8 holiday hours generates no overtime.
- Paying 1.5× on top of full straight time for every hour. This pays 2.5× for overtime work; the premium is the extra 0.5× only.
- Treating a promised bonus as discretionary. A bonus announced in advance for meeting a target is nondiscretionary regardless of what the policy calls it.
- Forgetting to retroactively allocate a quarterly or annual bonus. A bonus covering several weeks must be spread back over those weeks and the overtime recomputed, unless it is a fixed percentage of total earnings.
- Missing state daily overtime. Four ten-hour days generate no federal overtime but do generate eight hours of daily premium in California.
- Excluding unauthorised overtime. Hours worked must be paid even when the employee was told not to work them; the remedy is discipline, not non-payment.
Where the 40-hour week came from and what sits around it
The FLSA arrived in 1938 with a 44-hour threshold, stepping down to 42 in 1939 and 40 in 1940. The overtime premium was designed less as a reward for the worker than as a tax on long hours — a deliberate cost intended to push employers toward hiring more people rather than working fewer people harder. That framing explains why the statute caps nothing and forbids nothing: it makes long hours expensive rather than illegal.
Several structures sit alongside the basic rule. Section 7(k) gives fire protection and law enforcement employees a work period of up to 28 days with proportionally higher thresholds — 212 hours for firefighters and 171 for police over a full 28-day period. Section 7(b) allows limited annual-hours arrangements under collective bargaining agreements. Hospitals may adopt an 8-and-80 arrangement under section 7(j), paying overtime after 8 hours in a day or 80 in a fortnight. Each is an exception with its own conditions, and none of them is available simply because a schedule is inconvenient.
For record keeping, employers must retain time and pay records for at least three years and the supporting computations for two, under 29 CFR Part 516. That retention period is also the practical outer bound of a back-pay claim: two years for an ordinary violation and three where the violation is wilful. If you are reconstructing hours from punch data before checking a premium, the timecard hours calculator converts clock times into decimal hours, and the double time pay calculator covers the higher multipliers that state law and union contracts impose.