Compressed work schedules: 4/10, 9/80 and 3/12 explained

How compressed workweeks work, the overtime rules that apply, pros and cons for employers and employees, and how to set one up without surprises.

In shortA compressed work schedule fits a full-time workload into fewer, longer days. The common versions are 4/10 (four 10-hour days), 9/80 (eight 9-hour days and one 8-hour day over two weeks) and 3/12 (three 12-hour shifts). Federal overtime is based on hours over 40 in a workweek, so a well-designed compressed schedule does not create federal overtime. But some states, notably California, have daily overtime rules that change the math, and longer days bring fatigue and coverage questions.

What a compressed workweek is

In a standard 5/40 week, employees work five 8-hour days. A compressed workweek keeps the same total hours, or close to it, but concentrates them into fewer days, giving employees an extra day or more off. Some employers offer it as a benefit; others use it because longer shifts suit the work, such as healthcare, manufacturing, construction or emergency services. See also compressed workweek in our glossary.

The three most common patterns

Compressed schedule patterns
Pattern How it works Weekly hours Days off
4/10 Four 10-hour days each week 40 One extra day off every week
9/80 Eight 9-hour days plus one 8-hour day over two weeks 80 over two weeks One extra day off every two weeks
3/12 Three 12-hour shifts each week 36 (some schedules add a fourth shift some weeks) Four days off most weeks
4.5-day week Four 9-hour days plus a 4-hour day 40 A half day every week

Our glossary explains the 9/80 schedule and the four-day work week in more detail. Note that a four-day week can mean a compressed 4/10 week or a reduced-hours 32-hour week; they are different things.

Overtime: the federal rule

Under the Fair Labor Standards Act, non-exempt employees must be paid time and a half for hours over 40 in a workweek. There is no federal daily overtime. So a 4/10 schedule of exactly 40 hours does not trigger federal overtime, and a 3/12 schedule of 36 hours does not either. See FLSA overtime rules.

The 9/80 workweek trick

The 9/80 schedule needs care. Over two weeks, employees work 80 hours, but in a simple calendar workweek one week would contain 44 hours and the other 36. That would create 4 hours of overtime every two weeks.

Employers avoid this by defining the workweek so that it begins in the middle of the 8-hour day, typically at noon on the alternating Friday. Four hours of that day fall in one workweek and four in the next, so each workweek has exactly 40 hours. The FLSA allows employers to set a fixed, recurring workweek of 168 hours starting on any day and hour, but it must be set in good faith and not changed back and forth to avoid overtime. Document the workweek definition in writing.

State daily overtime

A few states have daily overtime rules. California is the best known: non-exempt employees generally earn overtime after 8 hours in a workday, and double time after 12. A 4/10 schedule in California would normally mean 2 hours of daily overtime every day, unless the employer adopts a valid alternative workweek schedule through a secret-ballot election of the affected employees and follows the state’s procedures. Other states, including Alaska, Nevada and Colorado, have their own daily overtime rules with different thresholds and exceptions.

Before introducing a compressed schedule, check every state where affected employees work. See our daily overtime rules guide and the California overtime calculator.

Pros and cons

Compressed schedules: benefits and drawbacks
For employees For employers
Pro: an extra day off and fewer commutes Pro: an attractive benefit for recruiting and retention
Pro: longer blocks of free time Pro: fewer handovers and start-up times per week
Con: long days can be tiring Con: fatigue can affect safety and quality late in the shift
Con: harder for childcare and appointments on workdays Con: coverage gaps on the extra day off if not staggered
Con: overtime on top of long days is exhausting Con: daily overtime risk in some states

Holidays, PTO and compressed schedules

Compressed schedules raise practical questions that should be answered in policy before launch:

How to introduce a compressed schedule

  1. Decide which roles it suits. Coverage-heavy roles may need staggered days off.
  2. Check overtime rules in each state and define the workweek in writing.
  3. Model coverage for every day of the week, including the extra day off.
  4. Write a short policy covering eligibility, holidays, PTO, overtime approval and how to opt out.
  5. Run a pilot of two to three months with one team and measure overtime, absences, output and feedback.
  6. Review fatigue and safety, especially in physical or safety-critical work.
  7. Roll out, and review again after six months.

A short example (fictional)

A small engineering firm with a 10-person field team moves to a 9/80 schedule. It defines its workweek as starting at noon on Friday, staggers the alternate Fridays off so half the team is always available, and changes holiday pay to match scheduled hours. After a three-month pilot, overtime is unchanged, customer response times are steady and employees rate the change highly in a short survey, so the firm keeps it.

How EZTime helps

EZTime lets you set your workweek start day and time, so a 9/80 workweek is calculated correctly. Overtime rules can follow daily and weekly thresholds, and schedules show who is off on each rotating day. Employees clock in from the mobile app, and reports show regular and overtime hours by pay period, so you can see whether the compressed schedule is working.

Frequently asked questions

Does a 4/10 schedule require overtime pay?

Not under federal law if total hours are 40 or less in the workweek. Some states, such as California, require daily overtime unless an alternative workweek is properly adopted.

How does a 9/80 schedule avoid overtime?

By defining the workweek to start in the middle of the 8-hour day, so each workweek contains exactly 40 hours.

Is a 3/12 schedule full-time?

It is 36 hours a week. Whether employees are treated as full-time depends on your policies and benefit rules.

How is holiday pay handled on a 4/10 schedule?

Decide in advance whether you pay the full 10 hours, allow PTO to cover the gap or let employees make up the time in the same workweek.

Can employers change the workweek to avoid overtime?

No. The workweek can be set once and changed only for legitimate, permanent reasons, not to avoid overtime.

Who benefits most from compressed schedules?

Roles with long tasks or travel, and employees who value extra days off over shorter days.

Where to go next

Keep reading

Labor rule alerts

Set overtime thresholds and weekly hour limits in EZTime and managers get an alert while there is still time to change the schedule. For a team of 15, EZTime starts at about $30 a month ($2 per employee).

Disclaimer: This guide is general information only and is not legal advice. Daily overtime and alternative workweek rules vary by state. Check with your state labor agency or a qualified employment attorney.