A 9/80 work schedule compresses 80 hours of work into nine days across a two-week period, giving you every other Friday off while keeping your total hours the same as a standard full-time job. You work four nine-hour days and one eight-hour day in the first week, then four nine-hour days in the second week with the fifth day off. The arrangement is popular for the alternating three-day weekends it produces, but it only complies with federal overtime law when the employer sets up the workweek correctly.
How the Two-Week Cycle Is Structured
The math is straightforward. Week one has four nine-hour days plus one eight-hour day, totaling 44 hours on the calendar. Week two has four nine-hour days and one day off, totaling 36 hours. Across the full two weeks, that adds up to 80 hours worked over nine days instead of ten.
Most employers designate Friday as both the eight-hour day in week one and the day off in week two. A typical nine-hour shift runs from 7:00 AM to 5:00 PM with a one-hour lunch. The eight-hour Friday runs from 8:00 AM to 5:00 PM with the same lunch break. Employees end up with a normal five-day week followed by a four-day week, and the pattern repeats.
The Workweek Split That Keeps It Legal
The Fair Labor Standards Act requires employers to pay at least one-and-a-half times the regular rate for every hour worked beyond 40 in a single workweek.1Office of the Law Revision Counsel. 29 U.S. Code 207 – Maximum Hours Under federal regulations, a workweek is any fixed, recurring block of 168 consecutive hours, and it can start on any day and at any hour the employer chooses.2eCFR. 29 CFR 778.105 – Determining the Workweek
If the employer measures the schedule against the standard calendar week, week one shows 44 hours and the employee is owed four hours of overtime every pay period. To prevent that, the employer redefines the workweek so it begins and ends at the midpoint of the eight-hour day. If Friday is the eight-hour day and the shift runs 8:00 AM to 5:00 PM, the workweek officially rolls over at noon on Friday.
Splitting the eight-hour day puts four hours on each side of the workweek line. The totals then balance:
- Week one: four nine-hour days (36 hours) plus the first four hours of the split Friday equals 40 hours.
- Week two: the remaining four hours of the split Friday plus four nine-hour days (36 hours) equals 40 hours.
Neither workweek exceeds 40 hours, so no overtime is owed. Once the workweek start time is set, it has to stay fixed. A change is allowed only if it is intended to be permanent and is not designed to evade the overtime rules.2eCFR. 29 CFR 778.105 – Determining the Workweek
What Goes Wrong Without the Split
An employer who puts non-exempt employees on a 9/80 schedule without redefining the workweek ends up with a 44-hour week followed by a 36-hour week. Those four extra hours in week one are overtime, and time-and-a-half is owed on each of them.1Office of the Law Revision Counsel. 29 U.S. Code 207 – Maximum Hours The short second week does not cancel out the long first week; each workweek stands on its own for overtime purposes.
This is the most common compliance mistake with 9/80 plans. An affected employee can recover the unpaid overtime, and the employer may also owe an equal amount in liquidated damages.
Who the Overtime Rules Apply To
The workweek split matters only for non-exempt employees, meaning those entitled to overtime pay under federal law. Employees classified as exempt, generally those in executive, administrative, or professional roles who meet both a duties test and a minimum salary threshold, are not covered by the FLSA’s overtime provisions.3U.S. Department of Labor. Earnings Thresholds for the Executive, Administrative, and Professional Employee Exemption
Exempt employees can work a 9/80 schedule without the employer redefining the workweek at all, because there is no overtime trigger to manage. If a workplace mixes exempt and non-exempt staff on the same schedule, the split has to be applied to every non-exempt employee. Misclassifying someone as exempt when they should be non-exempt creates the same overtime liability, made worse by the extra hour on each 9/80 workday.
States With Daily Overtime Rules
Federal law measures overtime only by the week. A handful of states also require overtime pay for hours worked beyond eight in a single day. In those states, every nine-hour day on a 9/80 schedule generates one hour of daily overtime, even if the weekly total stays at 40.
Alaska, California, Colorado, and Nevada are the states most commonly cited as having daily overtime thresholds. An employee on a 9/80 schedule in one of those states could accumulate eight hours of daily overtime every two-week cycle, one extra hour on each of the eight nine-hour days. Employers in these states should check with their state labor agency before adopting the schedule.
Holidays on a 9/80 Schedule
Federal law does not require private employers to pay for holidays.4U.S. Department of Labor. Holiday Pay When an employer does offer paid holidays, the 9/80 schedule creates a gap: most holiday policies credit eight hours, but the employee’s scheduled workday is nine hours. If a holiday falls on a nine-hour day, the employee is short one hour.
Common ways employers close that gap:
- The employee uses one hour of PTO or vacation to cover the difference.
- The employer grants a one-hour credit that can be used later in the pay period.
- The employer simply pays nine hours for holidays that fall on nine-hour days.
When a holiday falls on the employee’s scheduled day off, many employers offer a substitute day or a floating holiday. Whichever approach the employer picks, the policy should be in writing so employees know what to expect ahead of time.
Recordkeeping and Payroll Setup
Federal regulations require employers to keep records of the hours each employee works per day and the total hours worked each workweek.5eCFR. 29 CFR Part 516 – Records to Be Kept by Employers For a 9/80 schedule, those records have to reflect the redefined workweek rather than the calendar week. The payroll system needs to know that the workweek transitions at the midpoint of the eight-hour day, and it has to allocate hours accordingly.
At a minimum, the records should show the exact workweek start time (for example, 12:00 PM on Friday), the actual hours worked each day including the split-day allocation, the weekly totals confirming neither week exceeds 40 hours, and a signed acknowledgment from the employee showing they understand how the schedule works.
If a timekeeping system treats the eight-hour day as a single block assigned entirely to one workweek, it will produce one 44-hour week and one 36-hour week and generate an overtime obligation that should not exist. The transition time has to be built into the system’s workweek definition from the start. Without records showing that the workweek was properly defined and consistently applied, an employer has little to counter a claim that four hours of weekly overtime went unpaid.