Double Time vs Time and a Half: When Each Applies
Time and a half is federal law: nonexempt employees earn 1.5 times their regular rate for hours over 40 in a workweek. Double time is not federal law at all. It comes from state law (California is the big one), union contracts, or employer policy. Each hour gets the single highest premium that applies to it, and premiums never stack.
Workers hear the two phrases used almost interchangeably, but legally they live in different worlds. Time and a half is a federal guarantee written into the Fair Labor Standards Act. Double time is a patchwork: some states require it, some contracts promise it, some employers offer it as policy, and federal law says nothing about it either way. Mixing them up is how paychecks come out short, so it is worth learning exactly where each rate comes from.
Time and a half: the federal floor
Under the FLSA, covered nonexempt employees must receive overtime pay at not less than one and one-half times their regular rate for every hour worked over 40 in a workweek. That is the sentence that governs most overtime in America. The regular rate is all remuneration for employment, except the exclusions the statute lists, divided by total hours worked. So time and a half is computed on a bigger number than most people expect: it includes nondiscretionary bonuses, shift differentials, and commissions, not just the base wage.
The federal rule has sharp edges. It does not require overtime for work on Saturdays, Sundays, holidays, or regular days of rest as such. A 40-hour week that happens to include a Sunday pays straight time for all 40 hours. It does not limit how many hours you can be asked to work, and it applies on a strict workweek basis: your employer cannot average a 30-hour week with a 50-hour week to make the overtime disappear. Ten hours over 40 is ten hours at 1.5x, paid on the regular payday for the pay period in which the wages were earned.
Double time: where it actually comes from
The Department of Labor's own FAQ answers the question directly: the FLSA has no requirement for double time pay. It is a matter of agreement between an employer and an employee or the employee's representative. In practice, double time reaches your paycheck through one of four channels.
State law is the first. California requires double the regular rate for all hours over 12 in a single workday, and for all hours over 8 on the seventh consecutive day of work in a workweek. If you work in California, those hours are double time by statute, and our overtime pay calculator applies them automatically in California mode.
Union contracts are the second. Many collective bargaining agreements promise double time after a certain number of hours, on holidays, or for call-back shifts. Government contracts can add their own premium rules on top of the FLSA. The third channel is employer policy: plenty of companies pay double time on holidays or for emergency shifts because it keeps staffing voluntary and morale intact. The fourth is individual negotiation, which is rare but real for in-demand specialists.
The key point is that none of these are the FLSA. If your employer promised double time in a handbook and then stopped paying it, that is a contract or policy dispute, not a federal overtime violation. If you work in California and your employer skips the statutory double time, that is a state wage violation.
The stacking rule: one premium per hour
Here is the rule that keeps payroll honest: the same hour never earns two premiums. An hour that qualifies as both time-and-a-half under one rule and double time under another gets double time, not both. California's wage orders are explicit that overtime hours are compensated at the applicable rate, singular, and federal guidance treats true premium payments for overtime as excluded from the regular rate precisely so they are not counted twice.
Walk through a California 13-hour day at a $20 regular rate. Hours 1 through 8 are straight time: $160. Hours 9 through 12 are time and a half: 4 hours at $30, which is $120. Hour 13 is double time: $40. The day totals $320. The thirteenth hour does not also collect the time-and-a-half premium. It gets the higher of the two, which is double time.
The same logic applies where the weekly and daily rules overlap. If a California employee works six 8-hour days, the daily tiers produce no premium hours, but the weekly total is 48, so 8 hours earn 1.5x as weekly overtime. If the same employee works seven 8-hour days, day seven contributes 8 hours at 1.5x under the seventh-day rule, the daily tiers still produce nothing, and the weekly check adds 8 more hours at 1.5x from the straight-time pool. Total: 40 straight, 16 at time and a half. No hour is premium twice.
Holidays, weekends, and nights
Neither rate is triggered by the calendar alone. The FLSA does not require extra pay for work on weekends, holidays, or nights, and it does not require double time on holidays. If your employer pays time and a half on Sundays or double time on Thanksgiving, that is generosity or contract, and it can be changed going forward the same way any policy can. The one protection: if the premium is a true overtime premium required by law, your employer cannot count it as part of your regular rate to reduce what it owes elsewhere.
Shift differentials are a different animal. A night-shift differential is part of your regular rate, which means it raises your overtime rate too. If you earn $20 base plus a $2 night differential, your regular rate for those hours is $22, and your time-and-a-half rate is $33. Employers that compute overtime on the base rate alone are underpaying, and this is one of the most common overtime violations the Department of Labor finds.
How to read your own pay stub
Start with your regular rate. Add up everything you earned in the week except discretionary bonuses and expense reimbursements, and divide by your total hours. That is the number your 1.5x and 2x rates should be built on. Then sort your hours: straight time, time and a half, double time. Multiply, add, and compare to the gross on your stub. If the stub is short, the usual suspects are a regular rate computed on base pay only, missing daily premiums in California, or double-time hours paid at 1.5x. Run the same numbers through the calculator on our home page, print the step-by-step breakdown, and bring it to your employer with the specific hours and dates. Specificity turns a complaint into a correction.
Rules current as of October 2026. Sources: U.S. Department of Labor Fact Sheet #23 and FLSA FAQ (dol.gov); California Industrial Welfare Commission wage orders (dir.ca.gov).