How Is Overtime Pay Calculated? Time and a Half, Explained

Most overtime explanations are written for the person running payroll. This one is written for the person reading the stub. The federal rule is short; the errors hide in its inputs — which hours counted, what went into the rate, whether one week was averaged against the next. Every rule below comes from the U.S. Department of Labor's own guidance, and every example shows its arithmetic. The wider paycheck picture — withholding, FICA, gross versus take-home — is in our Paychecks & Taxes hub.

The FLSA rule: 40 hours, one workweek, time and a half

The federal overtime provisions sit in the Fair Labor Standards Act. Its core sentence, from the Department's overtime pay guidance: covered employees must receive overtime pay for hours worked in excess of 40 in a workweek at at least one and one-half times their regular rates of pay.

First, the unit is the workweek — a fixed, regularly recurring period of 168 hours, seven consecutive 24-hour periods. What an employer cannot do is move hours between weeks: averaging hours over two or more weeks is not permitted, so a 50-hour week followed by a 30-hour week is 10 overtime hours plus a short week, not a tidy 80. Second, the trigger is the week's total, full stop: the FLSA does not require overtime for work on Saturdays, Sundays, holidays, or regular days of rest as such — a Sunday shift earns the premium only if it pushes the week past 40. Third, the premium cannot be signed away: the overtime requirement may not be waived by agreement, and announcing that unauthorized overtime will not be paid does not remove the right to pay for hours actually worked. Normally, overtime is paid on the regular payday for the pay period in which it was earned.

Who gets overtime — and who does not

The rule protects nonexempt employees. The best-known exemptions are Section 13(a)(1)'s white-collar ones: bona fide executive, administrative, professional, and outside sales employees, plus certain computer employees. An exemption is never a job title: under Fact Sheet #17A, the employee's duties and salary must meet all of the Department's tests — the fact sheet states the standard salary level as not less than $684 per week — and job titles do not determine exempt status. A salary, on its own, exempts nobody. Nor do the exemptions reach manual laborers and other blue-collar workers, who are entitled to overtime no matter how highly paid they are, or police officers, firefighters, paramedics, and other first responders, regardless of rank or pay. If your work is physical and your stub shows no premium past 40 hours, that is the first thing to question.

What counts as hours worked

Overtime is owed on hours worked, so the count comes before any rate. The FLSA defines "employ" to include "to suffer or permit to work": work the employer knows about, or lets happen, is work time even if nobody requested it — the employee who stays late to finish a task is on the clock for those minutes. Fact Sheet #22:

• Short breaks count; working lunches count. Rest periods of 20 minutes or less must be counted as hours worked. A bona fide meal period (typically 30 minutes or more) does not count — but only if you are completely relieved of duty.
• Waiting and on-call time depend on the facts. Time spent "engaged to wait" is work time; time "waiting to be engaged" generally is not. On-call time on the employer's premises is work time; on-call at home generally is not, unless extra restrictions tie you down.
• Training and travel have tests. Meetings and training count unless all four conditions are met — outside normal hours, voluntary, not job-related, no other work performed. Ordinary commuting is not work time; travel between job sites during the day is.

One boundary runs the other way: the count is hours actually worked. Pay for time not worked — a paid holiday you did not work — is not hours worked, and such payments are excluded from the regular rate too.

The regular rate: the number everything hangs on

"Time and a half" is time and a half of the regular rate — a computed figure, not the number on your offer letter. Take all pay for the workweek, except the payments the Act itself excludes, and divide by the total hours actually worked; the result cannot be less than the minimum wage. The pay structure changes nothing — hourly, salary, commission, or piece rate, overtime is computed on the average hourly rate the earnings produce. Two rates in one week? The regular rate is the weighted average: all earnings added together, divided by all hours.

The exclusions are narrow: expense reimbursements, gifts on special occasions, pay for vacation or holiday time not worked, true premium payments. The Department states it directly: with some exceptions, bonus payments must be included in the regular rate. Fact Sheet #56C divides bonuses in two. Nondiscretionary bonuses — promised in advance or paid on a formula, including production, quality, attendance, and safety bonuses — must be included. A bonus is discretionary, and excludable, only if the employer alone decides whether to pay it and how much, not until at or near the end of the period, with no prior promise creating an expectation. The employer's label does not decide. Commissions and shift differentials go into the rate the same way.

Worked example: the bonus week

The Department's method runs in three steps: total compensation ÷ total hours = regular rate; regular rate × 0.5 = the half-time premium per overtime hour (straight time for those hours is already inside the total); premium × overtime hours = overtime due. Its worked example, with a promised $50 bonus:

Leave the $50 bonus out and the premium is figured on $10.00 flat — $15.00 instead of $16.74, and $495.00 instead of $496.74 for the week. That $1.74 gap is how regular-rate errors look: a small shortfall, repeated weekly. Run your own week with the overtime pay calculator on our sister site ToolRush, and compare its regular rate with your stub's.

Salaried but nonexempt: a salary is a rate waiting to be divided

A salaried nonexempt employee is owed overtime as an hourly worker is; the salary just has to be divided into an hourly rate first, and the divisor depends on what it is understood to cover. If it covers a set number of hours, divide by that number. The Department's example: $405 for a 45-hour workweek gives a regular rate of $405 ÷ 45 = $9.00. The salary already pays straight time for all 45 hours, so the extra owed is the half-time premium on the 5 overtime hours — 5 × $4.50 = $22.50, total $427.50. A fixed salary for a long week, with nothing on top, does not satisfy the Act. If a $1,000 salary instead covers 40 hours and the employee works 48, the rate is $25.00 and the 8 unpaid hours are owed in full: 8 × $37.50 = $300.00, total $1,300.00.

The fluctuating workweek method (Fact Sheet #82). A fixed salary is understood to be straight-time pay for all hours worked, and the hours genuinely fluctuate. The rate is recomputed weekly — salary plus any bonuses or commissions, divided by that week's actual hours — and the extra owed is half that rate per hour over 40. The Department's example: $600 in a 48-hour week gives a $12.50 rate, a premium of $6.25 × 8 = $50.00, and a $650.00 total. The method holds only on its conditions — a real mutual understanding, genuinely fluctuating hours, the full salary paid even in short weeks — and never where the salary covers a specific, fixed number of hours.

Common paycheck mistakes to check

Each item is a rule above, seen from the stub side — checkable in minutes with your hours and your rate.

• The two weeks were averaged. A 50-hour week and a 30-hour week paid as 80 straight hours. Averaging is not permitted; the 50-hour week carries 10 overtime hours.
• The premium was figured on the base wage alone in a week that also paid a nondiscretionary bonus, commission, or differential. Those payments belong in the rate, so the premium should exceed half your base wage.
• Breaks and working lunches vanished. Short breaks of 20 minutes or less are hours worked, and a meal period counts unless you were completely relieved of duty. Uncounted time understates the week's hours — and, past 40, the overtime.
• "Salary" ended the conversation. A salary does not make a worker exempt, nor does it include the premium on a week over 40 hours. Look for the division into an hourly rate, and a premium line on top.
• A flat sum was paid "for overtime." A lump sum paid regardless of how many overtime hours were worked does not qualify as an overtime premium; the hours and the rate still have to be computed.
• An agreement or approval policy replaced the pay. Overtime cannot be waived by agreement, and hours suffered or permitted to be worked are payable even if not pre-approved. Discipline for working them is a separate question; the pay is owed.

This page explains the mechanics; it is not legal advice and cannot decide any individual's classification or claim. Workers who find a gap they cannot reconcile can call the Wage and Hour Division at 1-866-487-9243.

The overtime tax myth: withholding is not a tax rate

Ask hourly workers why overtime "isn't worth it" and someone will say the extra hours are taxed at a higher rate. Federally, they are not. There is no separate federal tax rate for overtime: overtime pay is wages, taxed in the same layers as any other income. As the IRS puts it on its rates and brackets page, when income jumps into a higher bracket, "you pay the higher rate only on the part that's in the new tax bracket" — never on everything you earned.

Why, then, does the overtime check look taxed harder? Because withholding is not the tax; it is a per-check estimate, and the estimate annualizes. Under the IRS percentage method in Publication 15-T (Worksheet 1A), payroll multiplies this one pay period's wages by the number of pay periods in the year — 52 for weekly pay — before figuring withholding. An ordinary $800 week is annualized as $800 × 52 = $41,600; the $980 overtime week as $980 × 52 = $50,960. The worksheet works from a figure $9,360 higher because of one week's $180 of overtime pay, and withholds accordingly — it cannot know the spike will not repeat. Your actual tax is computed once, on the year's real total, when you file; overshot withholding is part of what filing settles, typically as a refund.

One real change sits underneath: For tax years 2025 through 2028, the IRS guidance on the new overtime deduction allows a deduction for qualified overtime compensation — but only the pay that exceeds the regular rate, generally the "half" portion of time-and-a-half the FLSA requires, as reported on a Form W-2, Form 1099, or another specified statement. The cap is $12,500 ($25,000 joint); it phases out above $150,000 of modified adjusted gross income ($300,000 joint) and is available whether or not you itemize. On the running numbers: 200 overtime hours at a $20 regular rate produce a $10-an-hour premium — $2,000 of qualified overtime, not the $6,000 of time-and-a-half pay those hours earned. Nothing changes at the payroll window: overtime remains generally subject to Social Security and Medicare tax, and any benefit arrives through the return.

Daily overtime and double time: state rules, not federal

On one point the federal floor is flat: federal law has no daily overtime rule. There is no FLSA premium after 8 hours in a day, and the FLSA does not require double-time pay at all — extra pay for nights, weekends, or holidays is a matter of agreement. Where either appears in a paycheck, it comes from a state law, a contract, or the employer's policy.

California is the fullest example, per the state Department of Industrial Relations' overtime FAQ. A nonexempt employee there is owed 1.5× the regular rate for hours over 8 up to and including 12 in any workday, and for the first 8 hours on the seventh consecutive day of work in a workweek — and double the regular rate for hours over 12 in a workday, and for hours over 8 on that seventh day. At a $20 regular rate, one 10-hour California day pays 8 × $20 + 2 × $30 = $220, even in a week that never reaches 40 hours; a 13-hour day pays 8 × $20 + 4 × $30 + 1 × $40 = $320. A handful of other states have daily rules of their own; most track the federal weekly rule.

The worker-side check is three questions. Were the hours counted workweek by workweek, as the Act counts them? Was the rate built from all the week's pay that belongs in it? And was the premium — at least half the true rate on top of straight time — actually paid on the regular payday? A stub that survives all three is very likely right.