How Many Hours Can an Employee Work in a Day? Rules and Scheduling Limits
Quick Answer
For employees 16 and older, the federal Fair Labor Standards Act sets no limit on how many hours they can work in a day or week, but non-exempt employees must be paid overtime for hours over 40 in a workweek. Some states require daily overtime, and some industries and roles, such as minors, drivers and certain healthcare workers, have hour limits. Many businesses set their own maximum hours to protect safety and control overtime.
When a shift runs long, someone calls out or a big job needs finishing, managers ask the same question: how long can I keep someone working? For most adult employees, federal law doesn't set a daily limit, but overtime, state rules, breaks and safety all affect the answer.
This guide explains federal and state rules on daily and weekly hours, special limits for minors and certain industries, double shifts and rest periods and how to set a maximum hours policy for your business.
Note: This is general information, not legal advice. State and local rules vary, and industry rules may apply. Check the rules where your employees work.
The Federal Rule for Adults
The Department of Labor says there is no limit in the Fair Labor Standards Act on the number of hours employees aged 16 and older may work in any workweek. What the FLSA does require is overtime: covered, non-exempt employees must receive overtime pay for hours worked over 40 in a workweek, at not less than one and one-half times their regular rate.
| Question | Federal answer |
|---|---|
| Daily hour limit for adults? | None under the FLSA |
| Weekly hour limit for adults? | None under the FLSA |
| Overtime? | Over 40 hours in a workweek for non-exempt employees |
| Daily overtime? | Not under federal law |
| Required breaks? | Not under federal law for adults |
State Daily Overtime
A few states require overtime based on daily hours, not just weekly. In those states, a long day can trigger overtime even if the week is under 40 hours. Some states also have rules about the seventh consecutive day of work. Check your state's overtime law. See overtime laws by state.
Minors
Workers under 18 have strict hour limits, especially 14- and 15-year-olds during the school year. Federal and state child labor laws limit daily hours, weekly hours and times of day. See how many hours teens can work.
Industry and Role-Specific Limits
| Industry or role | Example of limits |
|---|---|
| Commercial truck drivers | Federal hours-of-service rules limit driving and on-duty time |
| Healthcare | Some states restrict mandatory overtime for nurses |
| Transportation and aviation | Federal duty-time rules |
| Union workplaces | Contract limits on hours and overtime assignment |
If your business is in one of these areas, check the specific rules that apply. They can override a general "no limit" answer.
Breaks During Long Shifts
Federal law doesn't require meal or rest breaks for adults, but some states do, and long shifts often trigger extra break requirements. Short breaks that employers provide are generally paid. See meal and rest break laws by state and breaks for a 12-hour shift.
Double Shifts
A double shift is two back-to-back shifts, often 12 to 16 hours total. Doubles are legal for most adults, but they raise overtime costs, fatigue and mistakes. If you allow doubles:
- Require manager approval.
- Make sure breaks are provided as required.
- Track total weekly hours for overtime.
- Limit how many doubles an employee can work per week.
- Avoid scheduling a double right before an early shift.
Rest Between Shifts
Short turnarounds, like closing at midnight and opening at 6 a.m., are often called clopening. Federal law doesn't require rest between shifts, but some cities have rest rules with extra pay when shifts are too close together. See clopening shifts and the laws.
Fatigue and Safety
Even when long hours are legal, fatigue increases the risk of accidents, especially when driving, operating equipment or working at heights. Long hours also hurt service quality and morale. Consider fatigue when scheduling safety-sensitive work and limit long stretches without rest.
Free Maximum Hours Policy Template
Maximum Hours Policy
1. Non-exempt employees may not work more than [X] hours in a day or [X] hours in a workweek without manager approval.
2. Overtime must be approved in advance except in emergencies. All hours worked will be paid, including unapproved overtime.
3. Employees should have at least [X] hours off between shifts when possible.
4. Double shifts are limited to [X] per week and require approval.
5. Required meal and rest breaks must be taken as scheduled.
6. Employees who feel too fatigued to work safely should tell their manager.
7. Minors follow separate hour limits under child labor laws.
Adapt the limits for your business and have an employment attorney review it for your state.
Scheduling to Avoid Overtime Surprises
- Check each employee's weekly total before adding shifts.
- Set alerts when someone approaches 40 hours or your daily limit.
- Spread extra shifts across part-time staff.
- Track actual hours against scheduled hours during the week.
- Review overtime by employee and department weekly.
See scheduled vs. actual hours and the overtime approval policy.
Weekly Hours Tracker
| Employee | Mon | Tue | Wed | Thu | Fri | Sat | Sun | Total | Over limit? |
|---|---|---|---|---|---|---|---|---|---|
| ☐ | |||||||||
| ☐ | |||||||||
| ☐ |
Example: A Landscaping Company
During spring cleanups, a landscaping company's crews regularly worked 12-hour days, six days a week. Overtime costs soared and two minor equipment accidents happened late in long days. The owner set a 10-hour daily limit without approval, capped weekly hours at 55, added a second crew for peak weeks and used overtime alerts. Overtime fell, and late-day incidents stopped.
Common Mistakes
- Assuming long hours are illegal or that they're always fine; check state and industry rules.
- Not paying unapproved overtime.
- Missing daily overtime in states that require it.
- Skipping required breaks on long shifts.
- Scheduling minors like adults.
- Ignoring fatigue in safety-sensitive work.
Hours Limit Checklist
| Step | Done? |
|---|---|
| Check state daily overtime and break rules | |
| Check industry-specific hour limits | |
| Apply child labor limits for minors | |
| Set your own maximum hours policy | |
| Require approval for overtime and doubles | |
| Track weekly hours and overtime | |
| Pay all hours worked |
Daily and Weekly Hours by Situation
| Situation | Typical considerations |
|---|---|
| Adult, non-exempt, 8-hour shifts | Overtime after 40 weekly hours; check state daily rules |
| Adult, 12-hour shifts | Breaks, fatigue, daily overtime states |
| Exempt salaried employees | No overtime if exemption applies; hours still matter for workload |
| Minors | Strict daily and weekly limits |
| Drivers | Hours-of-service rules may apply |
Exempt Employees and Long Hours
Exempt salaried employees who meet the requirements for an overtime exemption aren't owed overtime for long days. But long hours still affect burnout, turnover and mistakes. If salaried managers regularly work 60-hour weeks, look at staffing and workload, not just the law. See do salaried employees need to track time.
Workweek and Overtime Math
Example: An employee works 12 hours Monday, 12 hours Tuesday and 8 hours Wednesday through Friday. Total = 48 hours. Under federal law, 8 hours are overtime. In a state with daily overtime after 8 hours, the Monday and Tuesday hours over 8 may also count, so check your state.
Overtime is based on your fixed workweek. See how to set your workweek.
Mandatory Overtime
Under federal law, employers can generally require adult employees to work overtime, as long as it's paid correctly. Some states and industries restrict mandatory overtime, and union contracts often set rules. If you require overtime, give as much notice as possible and spread it fairly.
On-Call and Travel Time
Long days often include travel between job sites or on-call time. Travel from job site to job site during the workday counts as hours worked, and on-call time can count depending on how restricted the employee is. Include these when counting daily and weekly hours. See on-call policy and travel time pay.
Questions to Ask Before Scheduling a Long Shift
- Will this push the employee over 40 hours this week?
- Does my state have daily overtime or break rules?
- Is the employee a minor?
- Is the work safety-sensitive?
- Is there someone else who could cover part of the shift?
Sample 12-Hour Shift Schedule
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun | Total |
|---|---|---|---|---|---|---|---|---|
| Week 1 | 12 | 12 | Off | Off | 12 | 12 | Off | 48 |
| Week 2 | Off | Off | 12 | 12 | Off | Off | 12 | 36 |
This common rotation averages 42 hours a week, but overtime is calculated each workweek, so week 1 includes 8 overtime hours. See the 2-2-3 schedule.
Tracking Hours Accurately
You can only manage daily hours if you track them accurately. Make sure employees clock in and out for every shift and meal break, record travel and on-call time that counts as work and review time cards before payroll. Rounding and missed punches add up quickly on long shifts.
Talking With Employees About Long Hours
Some employees want extra hours; others feel pressured to stay late. Ask employees about their availability and limits, offer extra shifts fairly and make it clear they can raise fatigue or safety concerns without retaliation. Clear expectations keep long hours from turning into burnout or turnover.
Getting Started
- Check your state's daily overtime, break and rest rules.
- Identify any industry or minor-specific limits.
- Set a maximum hours policy and approval process.
- Turn on overtime and hour alerts.
- Review weekly hours with managers.
Hours Rules Quick Reference
| Rule | Where it comes from |
|---|---|
| Overtime after 40 hours a week | Federal FLSA, for non-exempt employees |
| Daily overtime | Some states |
| Meal and rest breaks | Some states |
| Rest between shifts | Some cities |
| Hour limits for minors | Federal and state child labor laws |
| Driving and duty limits | Industry regulations |
| Your own maximum hours | Company policy |
Use this table as a starting checklist when you set scheduling rules or open in a new state.
Overtime Costs of Long Days
Example: An employee earning $20 an hour works 50 hours in a week. The first 40 hours cost $800. The 10 overtime hours cost $30 each, or $300. Total: $1,100. Spreading those 10 hours to a part-time employee at straight time would cost $200, saving $100 that week.
Small changes in how extra hours are assigned add up over a year, especially across a whole team. See labor cost percentage.
Long Hours and Remote Employees
Remote non-exempt employees can easily work extra hours without anyone noticing: answering messages at night, starting early or skipping breaks. Those hours must be paid. Set clear expectations about after-hours work, require employees to record all time worked and review time cards for unusual patterns. See is it illegal to work off the clock.
When Employees Ask for More Hours
Some employees want overtime for the extra pay. Decide in advance how extra hours are offered: by rotation, seniority or volunteers first. Write it down so overtime is distributed fairly and doesn't become a source of complaints. Keep your maximum hours policy in place for safety even when employees volunteer.
Hours Limits for Seasonal Peaks
Busy seasons tempt businesses to stretch existing staff. Plan peaks ahead: hire seasonal help, cross-train employees, schedule overtime fairly and keep your maximum hours policy in place. Track hours weekly during the peak so you can see when people are getting worn down before mistakes or turnover follow. See the seasonal hiring guide.
Weekly Hours Review
Set aside 15 minutes each week to review hours by employee. Look for anyone close to overtime, anyone working unusually long days and patterns like the same people always staying late. Adjust the next schedule before problems build. A weekly habit catches most overtime and fatigue issues early, when they're still easy to fix.
Long Shifts and Meal Periods
In states that require meal periods, long shifts may require more than one. Schedule meal breaks into long shifts rather than leaving them to chance, and make sure employees are relieved of duty during unpaid meals. Record meal periods on the time clock so you can show they were taken.
If an employee works through an unpaid meal, that time must be paid, so review time cards for missed or short meals before payroll.
Holiday Weeks and Long Hours
Holiday weeks can create long days for employees who cover for others. Holiday hours paid but not worked generally don't count toward federal overtime, but extra shifts worked to cover holidays do. Plan coverage ahead so a few people aren't stuck with all the long days, and check your state's rules on holiday premiums. See overtime and holiday pay in the same week.
Rotating holiday coverage across the team keeps long days fair from year to year.
Clear limits and steady tracking protect your employees, your customers and your labor budget.
Review your maximum hours policy each year as your team, locations and state rules change.
Final Takeaway
For most adult employees, the law doesn't cap daily hours, but overtime, state rules and safety do. Set your own limits, track hours closely and pay for every hour worked.
Control Hours and Overtime With Updoot
Updoot's scheduling shows weekly totals as you build the schedule, and the employee time clock alerts managers before employees hit overtime or your hour limits.