The 24/48 schedule — 24 hours on duty followed by 48 hours off — is the most widely used rotation in American fire departments. It keeps stations staffed around the clock with three rotating crews, gives firefighters long recovery windows between shifts, and has a rhythm that most crew members say becomes second nature within a few weeks.
What it doesn't do is make your paycheck easy to calculate. Federal overtime law for firefighters operates under a special rule — the FLSA Section 7(k) exemption — that most workers have never heard of, and most departments use it to set an overtime threshold that looks nothing like the standard 40-hour workweek. This guide breaks all of it down, including a full pay example you can use as a reference.
How the 24/48 rotation works
Three crews — typically called A, B, and C shift — rotate through the same station in sequence. While Crew A is on its 24-hour shift, Crew B and Crew C are in their combined 48-hour off window. The following day, Crew B takes the station. The day after, Crew C. Then it starts again.
This means each crew works every third day. Over a standard week, that produces an uneven hour count — roughly 56 hours in some weeks, fewer in others — which is exactly why the FLSA 7(k) exemption exists.
Annual hours comparison
| Schedule | Hours/Year | Shifts/Year | Days Off/Year |
|---|---|---|---|
| 24/48 firefighter | 2,920 | ~122 | ~243 |
| Standard 40-hr/week | 2,080 | 260 (8-hr days) | ~104 |
| Pitman 12-hr rotation | ~2,184 | ~182 | ~183 |
At 2,920 hours annually, a 24/48 firefighter works considerably more hours than a typical office worker — which is why base hourly rates in fire service tend to look lower than they are on a per-hour basis.
FLSA overtime for firefighters: the 7(k) exemption explained
For most hourly workers in the US, overtime kicks in after 40 hours in a 7-day workweek. Firefighters are different. Under FLSA Section 7(k), fire departments that choose to participate can use a work period of 7 to 28 days — and overtime only kicks in once a specific hour threshold for that longer period is exceeded.
The most common election for 24/48 departments is a 28-day work period, with an overtime threshold of 212 hours. Here's what that means in practice:
Key rule: In a 28-day FLSA work period, a firefighter on a 24/48 schedule typically works 9 or 10 shifts — that's 216 or 240 hours. Either way, they exceed the 212-hour threshold, so FLSA overtime applies to the hours over 212. But many departments pay a "straight-time" rate for all hours and then add the half-time premium only for overtime hours — not the full 1.5× rate on overtime hours. This is called the "fluctuating workweek" or "half-time" method.
7(k) work period thresholds at a glance
| Work Period Length | Overtime Threshold (Fire) | Notes |
|---|---|---|
| 7 days | 53 hours | Equivalent to standard weekly OT for fire |
| 14 days | 106 hours | Common in smaller departments |
| 28 days | 212 hours | Most common for 24/48 departments |
Departments are required to formally elect the 7(k) exemption and define their work period. If your department hasn't elected 7(k), the standard 40-hour/7-day rule applies, which means nearly every 24-hour shift creates FLSA overtime at 1.5× your regular rate.
Real pay example: $28/hr base rate on a 24/48 schedule
Let's use a mid-career firefighter earning $28.00/hr base pay at a department using a 28-day FLSA work period and the 212-hour overtime threshold. In a typical 28-day period, this firefighter works 10 shifts (240 hours).
Add a hazard differential, paramedic certification pay, or holiday premium and that figure climbs significantly. Many experienced urban firefighters on 24/48 schedules with moderate overtime land between $90,000 and $115,000 annually in total gross compensation before benefits.
What changes in California
California firefighters operate under a different legal environment. The state's own Labor Code imposes daily overtime rules that go beyond FLSA — though Cal Fire personnel and some municipal departments benefit from specific exemptions. Key differences to know:
- Many California municipal fire departments negotiate MOU provisions (Memoranda of Understanding) that define overtime thresholds directly, often mirroring the FLSA 7(k) 212-hour/28-day standard but with additional premium pay for specific holidays or callbacks.
- California's FLSA 7(k) election still applies at the federal level for municipal departments, meaning the 212-hour threshold remains the operative overtime trigger for most sworn firefighters.
- Some California departments have negotiated "Kelly days" — periodic days off built into the schedule — to reduce average hours and manage overtime costs. A Kelly day effectively reduces the hours worked per period without changing the 24/48 rotation itself.
Kelly days explained: A Kelly day is a scheduled day off built into the rotation — typically one every 6–9 shifts — that a department uses to reduce total annual hours. Without Kelly days, a 24/48 crew works approximately 2,920 hours per year. With one Kelly day per 6-shift cycle, that drops to roughly 2,800 hours. The hours still count toward your FLSA work period threshold.
Overtime during holdovers and callbacks
Two situations generate overtime beyond the base 24/48 rotation:
- Holdovers: When the incoming crew doesn't show up, you stay. Any holdover hours count toward your 28-day FLSA threshold and may push you deeper into overtime territory.
- Callbacks: If you're called back during your 48-hour off window, those hours are added to your current work period total. Each hour worked counts toward the 212-hour ceiling. Once you exceed it, every callback hour pays at 1.5×.
Track your own hours across the full 28-day period. Most firefighters who miss overtime pay do so because they don't realize how close they are to the threshold when a callback comes in.
Benefits of the 24/48 schedule
- Two full days off after every single shift — plenty of time for recovery, family, and a second job
- Only 10 shifts per 28-day period on a typical rotation, versus 20 days of reporting for a standard 5-day-a-week schedule
- Predictable, repeating rhythm that is easy to plan around
- Overtime pay structure can significantly boost annual earnings compared to the hourly rate alone
Run your own 24/48 pay calculation — base rate, holdovers, callback OT, and differentials included.
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