Recap hours are the hours that “roll back” onto your available driving clock each midnight as the oldest day in your cycle drops off. If you’re on the 70-hour/8-day rule, any on-duty hours you worked eight days ago fall off your record at midnight and get added back to your available total. It’s a rolling window, not a fixed weekly reset, and understanding how it works determines whether you can keep moving or need to park.
The 70-Hour Rule Behind Recaps
Federal hours-of-service regulations set a cumulative cap on how much you can work over a multi-day period. If your carrier operates vehicles every day of the week, you’re on the 70-hour/8-day schedule: you cannot drive a commercial motor vehicle after accumulating 70 hours of on-duty time in any eight consecutive days. Companies that don’t run every day use a 60-hour/7-day schedule instead.
This isn’t a fixed calendar week that resets on Sunday. It’s a rolling window. Every day, the calculation looks back at the previous seven or eight days, adds up all your on-duty time, and checks whether you’ve hit the limit. That rolling nature is exactly what creates recap hours.
How Recap Hours Actually Calculate
Each night at midnight, your log drops the oldest day from the window and recalculates. The on-duty hours from that oldest day are no longer counted against your 70-hour cap, so they effectively come back to you.
The formula is simple: 70 minus the total hours you worked in the last seven days equals the hours available to you tomorrow. Say you drove nine hours last Monday. When this Monday hits midnight, those nine hours fall off your eight-day window. If you had only one hour left on your clock before midnight, you now have ten.
Here’s a more complete example. Imagine you start a new cycle and work these hours over eight days:
- Day 1: 10 hours on duty
- Day 2: 10 hours
- Day 3: 10 hours
- Day 4: 10 hours
- Day 5: 10 hours
- Day 6: 10 hours
- Day 7: 10 hours (now at 70 total, clock is used up)
- Day 8: 0 hours (can’t drive)
At midnight after Day 8, the 10 hours from Day 1 drop off. Your new seven-day total is 60, so you have 10 hours available on Day 9. At midnight after Day 9, Day 2’s hours drop off, giving you another 10 back. The cycle keeps rolling forward like this indefinitely.
The key detail: only on-duty hours from the dropped day come back. If you worked just four hours on the day that falls off, you only get four hours back, regardless of what you need.
Why Daily Limits Still Apply
Even if recaps give you a full 70 hours of availability on your cumulative clock, you can’t burn through them all at once. Federal rules cap property-carrying drivers at 11 hours of driving within a 14-hour on-duty window after coming off at least 10 consecutive hours off duty. So your recap hours tell you how much room is left on your multi-day clock, but your daily limits tell you how much of that room you can actually use today.
If your recaps give you 12 hours back but you’re capped at 11 hours of driving per shift, you can only use 11. The extra hour carries forward as unused availability on your 70-hour clock.
Recaps vs. the 34-Hour Restart
You have two ways to replenish your 70-hour clock: running on recaps or taking a full 34-hour restart. A 34-hour restart wipes the slate completely. After 34 or more consecutive hours off duty, your entire 70-hour clock resets to zero, and you start fresh.
Running on recaps means you never fully stop. You keep driving each day, and hours trickle back in as old days fall off. This works well if you consistently drive fewer than about nine hours per day, because the hours coming back each midnight roughly keep pace with the hours you’re using. You stay busy, avoid sitting for a day and a half in a random truck stop, and keep the loads moving.
The tradeoff is flexibility. When you run on recaps, your available hours each day depend entirely on what you did eight days ago. Some days you might get back ten hours, other days only five. If you want to run longer days with more miles, a 34-hour restart gives you a full clock to work with afterward. It also gives you a genuine rest period, which matters for fatigue management even if the math says you’re legal.
Many carriers have their own policies on this. Some prefer to keep drivers on recaps continuously to maximize productivity. Others require periodic 34-hour restarts as a safety practice. Your preference matters, but it’s always subject to what your company allows.
How Your ELD Handles the Math
Electronic logging devices track all of this automatically. Every time your truck moves, the ELD records driving time. When you stop for five minutes, it prompts you to confirm whether you’re still driving or should switch to on-duty not driving. It captures your location at every status change, converts it to a nearby city and state, and logs everything in the time zone of your home terminal.
Most ELDs display a field called “Hours Available Tomorrow” or something similar. That number reflects the recap calculation: your 70-hour cap minus the on-duty hours from your current rolling window, plus whatever falls off at midnight. You don’t need to do the math yourself, but understanding the formula helps you spot errors and plan your week. If you know you worked a light day eight days ago, you know not to expect many hours back at midnight.
ELDs are also tamper-resistant by design. The data they capture can’t be altered after the fact, which means your recap calculation is based on a locked record. If there’s a discrepancy between what you expect and what the device shows, the issue is usually a forgotten period of on-duty not driving (fueling, inspections, loading) that you didn’t account for in your mental math.
Adverse Conditions and the Two-Hour Extension
One situation that indirectly affects your recap planning: adverse driving conditions. If you encounter snow, ice, fog, or unexpected traffic that you couldn’t have known about before starting your shift, you can extend both your 14-hour driving window and your 11-hour driving limit by up to two hours. This gives you room to safely reach a stopping point without violating daily limits.
Those extra hours still count as on-duty time on your 70-hour clock, though. Using the adverse conditions extension today means fewer recap hours available eight days from now. It’s a short-term safety valve, not free time.
Planning Your Week Around Recaps
The drivers who use recaps most effectively plan backwards. They look at what they worked seven and eight days ago and project how many hours will be available over the coming days. If you had a heavy stretch of 10-plus hour days a week ago, you’ll get a big batch of hours back. If you had a light week, the trickle will be small.
A practical pattern for staying on recaps indefinitely: keep your daily on-duty time around eight to nine hours. At that pace, roughly eight to nine hours drop off each midnight, and you maintain a steady buffer on your 70-hour clock without ever needing to shut down for 34 hours. Push consistently above that, and the math eventually forces you into either very short days or a full restart.
Knowing your recap number also helps you decide whether to accept a load. If your ELD shows six hours available tomorrow and the next delivery requires nine hours of driving, you either need to wait for more hours to roll back or take the 34-hour restart. Checking the recap projection before committing saves you from getting stranded mid-route with a ticking clock.