In the United States, it is generally not illegal for an employer to require an adult employee to work 13 hours in a single day. The federal Fair Labor Standards Act (FLSA) does not limit the number of hours per day or days per week a non-exempt employee over age 16 can work, provided they are paid minimum wage and overtime (1.5x) for hours exceeding 40 per workweek.
The Occupational Safety and Health Administration (OSHA) says that a normal work shift is no more than 8 consecutive hours in a day, with each shift split by at least 8 hours of rest. A normal workweek is 5 such work days. However, this is not binding. OSHA does not penalize employers who demand more.
The standard workday in California is eight hours. Non-exempt employees typically cannot exceed 40 hours per week without receiving overtime pay. Therefore, the answer to "how many hours can you work in a day" is usually eight, unless specified otherwise in an employment contract.
Missouri law doesn't set maximum work hours for adults but requires overtime pay (1.5x regular rate) for non-exempt employees working over 40 hours weekly; specific limits apply to youth employment (e.g., 3 hours/school day for 14-15 year olds) and some hazardous jobs, while paid sick leave for most private employees starts May 1, 2025. Employers must pay for all hours worked, including travel during the workday, and adhere to federal laws like FMLA for larger businesses.
There is no limit on the number of hours employees 16 years or older may work in any workweek. The FLSA does not require overtime pay for work on weekends, holidays, or regular days of rest, unless overtime is worked on such days.
There is a limit of working more than 48 hours a week under the Working Time Regulations - unless you opt out - but there is no limit for a single day. Shift workers in my industry (offshore oil and gas) work a 12 hour shift, and often work overtime on top of that.
The Act requires that employees must receive at least the minimum wage and may not be employed for more than 40 hours in a week without receiving at least one and one-half times their regular rates of pay for the overtime hours.
Maximum Working Hours in India
The Factories Act, 1948, stipulates that adult workers should not work more than 9 hours a day or 48 hours a week.
Is Missouri a Right-to-Work State? Right-to-work states prohibit employers from requiring union membership or dues as a condition of employment (a.k.a. union security agreements). Missouri currently has no right-to-work laws or regulations.
For adult employees, there is no legal limit to the number of hours that one can work per week, but the Fair Labor Standards Act dictates standards for overtime pay in both the private and public sectors.
14 ways to cope with working long hours
Under California law, if you work more than eight hours in a day or 40 hours in a week, you could be owed one and a half times your regular rate of pay for any hours worked above the first eight.
Overworking increases the risk of cardiovascular diseases and stroke, as well as affecting mental health. Physical and mental strain of the overworked people can start from acute physiological responses such as fatigue, stress, impaired sleep, and unhealthy lifestyle changes in response to the stress.
A normal work shift is generally considered to be a work period of no more than eight consecutive hours during the day, five days a week with at least an eight-hour rest.
The 9-9-6 rule is a demanding work schedule, especially prevalent in China's tech sector, meaning employees work from 9 a.m. to 9 p.m., six days a week, totaling 72 hours weekly, and is associated with burnout, health risks, and being declared illegal by Chinese authorities, despite some recent advocacy for intense work ethics.
Most experts agree that it's unrealistic to expect anyone to work productively for eight hours straight, five days a week. Studies typically show that knowledge workers average three to six hours of productive work in an eight-hour day.
In general the maximum average working week is 48 hours. As a night worker, you should not work more than an average of 8 hours in a 24-hour period. The average is calculated over either: A 2-month period.
To calculate time using the 7-minute rounding rule: Look at the minutes past the quarter-hour. If it's 0-7 minutes, round down to the quarter-hour. If it's 8-14 minutes, round up to the next quarter-hour. For example, 8:07 AM rounds to 8:00 AM, while 8:08 AM rounds to 8:15 AM.
The "8/80 Rule" refers to two different concepts: a U.S. labor law exception for healthcare overtime, allowing time-and-a-half for hours over 8/day or 80/14-days for hospitals, and a project management guideline for task sizing (work packages) to be between 8 and 80 hours for effective tracking, preventing excessive detail or overly large chunks of work. Both involve a range (8 to 80) but serve distinct purposes in payroll and project planning.
There is generally no cap on the number of hours you can legally work in a day. But under California labor laws, you, as a non-exempt employee, are entitled to overtime pay if you work: More than eight (8) hours in a single workday; More than forty (40) hours in a single workweek; or.
shifts is already taxing. Adding overtime to this schedule significantly disrupts the body's natural circadian rhythm. This disruption can lead to: Increased risk of cardiovascular disease – Studies have shown a correlation between long work hours and higher rates of heart disease, stroke, and hypertension.