9/80 schedule

The name describes the structure directly: nine days of work, 80 total hours. This pattern appears most often in engineering, aerospace and defense, government agencies, and technology companies — roles where standard business hours apply but some daily flexibility is possible.

Key takeaways

• What it is: a compressed two-week cycle — 80 hours across nine working days, with every other Friday off.
• Core pattern: Monday to Thursday run 9 hours each week; week one closes with an 8-hour flex Friday, week two closes with Friday off entirely.
• When it fits: teams that want predictable three-day weekends without drawing on leave balances, in roles that don’t require around-the-clock coverage.
• Main trade-off: longer daily hours and payroll complexity — hours don’t divide evenly across calendar weeks, and staggered start dates make it harder to track which Friday is on or off.
• Requirement: needs a payroll setup that can handle biweekly hour totals rather than strict 40-hour weeks, plus a legal review in jurisdictions where 9-hour days trigger overtime thresholds.

How a 9/80 schedule works

A typical 9/80 cycle runs across two weeks like this:

Week 1: Mon–Thu 9 hrs, Fri 8 hrs (flex day) Week 2: Mon–Thu 9 hrs, Fri off

The 8-hour Friday in week one is often called the flex day. It keeps the two-week total at exactly 80 hours while freeing up the second Friday entirely. The result is a predictable three-day weekend every second week, with no leave required.

How it compares to other compressed schedules

Compared to a standard 4/10 compressed week (four 10-hour days with Friday off every week), the 9/80 schedule keeps the same two-week hour total but spreads the extra time across more days. That makes daily shifts slightly shorter than a 10-hour day, but the day off comes every other week rather than every week. Compared to a fixed five-day week, the trade-off is longer daily hours in exchange for built-in long weekends.

Common challenges

Tracking which Friday is on and which is off gets complicated when team members have staggered start dates or different schedule types running in parallel. Payroll setup needs attention because hours don’t divide evenly across each calendar week. Some jurisdictions tie overtime rules to daily or weekly hour thresholds, so 9-hour days may need a legal review depending on where your team is based.

Common questions

How does the 9/80 schedule work?

Employees work 9 hours Monday through Thursday in each of two consecutive weeks. Week one includes an 8-hour Friday — the flex day — that brings the first week’s total to 44 hours. Week two ends with Friday off, keeping the full two-week total at exactly 80 hours. Every second week delivers a three-day weekend without using any leave.

What are the pros and cons of the 9/80 schedule?

The main advantage is a predictable three-day weekend every other week, plus one fewer commute per two-week period, without touching leave balances. For employers, longer daily hours can improve overlap with core business hours, and the schedule is easy to explain as a hiring perk. The trade-offs are payroll complexity from uneven weekly hour totals, potential overtime exposure on 9-hour days in some jurisdictions, and coordination headaches when team members start the cycle on different dates.

How Zelos helps

Zelos is a task and shift signup app with built-in messaging. It works alongside 9/80 schedules when flex Fridays or off-week coverage need filling — teams can post open shifts on flex days, manage coverage during off weeks, or let people pick up extra work without routing every request through a manager.