Daily Rest Period Rules for HGV Drivers: 11 Hours, 9 Hours, and the Reduced Rest Exception
The daily rest rule is where the maths of a working day either adds up or breaks the law. Get the 11-hour rest right and everything else flows; misuse the 9-hour reduced rest and you've got an infringement on the tachograph that DVSA will find.
This is a deep dive into daily rest specifically — the 11-hour regular rest, the 9-hour reduced exception, and split rest — with worked examples for planning a compliant day. For how daily rest fits into the wider daily and weekly cycle, see our HGV weekly rest periods guide; for the driving limits themselves, see the HGV driving hours guide.
General guidance, not legal advice. Daily rest rules under assimilated (retained EU) drivers' hours apply to most goods vehicles over 3.5t in commercial use. Vehicles under GB domestic rules or specific exemptions differ. Always check the rules that apply to your operation against current DVSA guidance.
The Regular Daily Rest: 11 Hours
Under assimilated drivers' hours rules, a driver must take at least 11 hours of rest every day.
The phrase "every day" is precise: the rest must be completed within each 24-hour period, and that period starts when the driver first begins work after their last daily or weekly rest.
Here's why the start point matters. If a driver begins work at 06:00 Monday, the 24-hour window closes at 06:00 Tuesday. An 11-hour rest must fit inside that window — so the rest must start no later than 19:00 Monday (19:00 + 11 hours = 06:00). Start the rest at 20:00 and you've only got 10 hours before the window closes: an infringement, even though the driver "felt rested."
That single calculation — work-start time plus duty period, leaving room for 11 hours' rest — is the spine of compliant day planning.
The Reduced Daily Rest Exception: 9 Hours
A driver can take a reduced daily rest of at least 9 hours instead of 11 — but only 3 times between any two weekly rest periods.
This is the exception that makes a longer working day possible. The rules around it:
- Maximum 3 reductions between weekly rests. A 4th reduced rest in the same period is an infringement.
- No payback required. Unlike reduced weekly rest, you don't have to compensate the lost hours later.
- Cannot be split. A 9-hour reduced rest must be taken as one unbroken block.
The reduced rest is what unlocks the 15-hour duty day: a 15-hour spread of duty followed by a 9-hour rest fits exactly inside the 24-hour window (15 + 9 = 24). Try the same 15-hour day with an 11-hour rest and the maths fails (15 + 11 = 26 hours — two hours over).
Worked Example: A Week Using Reduced Rest
A sole-trader running a delivery round Monday to Saturday:
| Day | Duty period | Daily rest taken | Type |
|---|---|---|---|
| Mon | 15 hours | 9 hours | Reduced (1 of 3) |
| Tue | 13 hours | 11 hours | Regular |
| Wed | 15 hours | 9 hours | Reduced (2 of 3) |
| Thu | 13 hours | 11 hours | Regular |
| Fri | 15 hours | 9 hours | Reduced (3 of 3) |
| Sat | 13 hours | (weekly rest starts) | Regular |
This satisfies the daily-rest rules: exactly 3 reduced rests, no payback owed, and a weekly rest beginning before the sixth 24-hour period closes. Add a 15-hour Saturday with another 9-hour rest and you'd breach the 3-reduction limit.
Daily rest is only one layer, though. A real week of 13-15 hour duty days must also stay inside the 56-hour weekly driving limit and the Working Time Directive caps (60 hours maximum in any single week, 48 hours averaged) — long duty days like these often hit the WTD ceiling well before the daily-rest rules become the binding constraint. See the HGV weekly rest periods guide for how those weekly limits interact.
The lesson for planning: treat reduced rests as a budget of three per week. Spend them on your busiest days, and don't drift into a fourth without realising.
Split Daily Rest
The regular 11-hour daily rest can be taken in two separate periods instead of one block — useful when a driver has a long mid-shift wait.
The split rules are exact:
- The first period must be at least 3 hours of uninterrupted rest, taken at any time during the day
- The second period must be at least 9 hours of uninterrupted rest
- Both must fall within the 24-hour cycle
There's a catch most operators miss: when you split daily rest, the total is 12 hours, not 11 (3 + 9). Splitting doesn't reduce the total rest — it increases it. So a driver who wants to split a rest needs to find 12 hours, not 11, inside the working day.
Two more constraints:
- Reduced (9-hour) rest cannot be split. Only the regular rest can be taken in 3 + 9.
- The order is fixed in effect: you need a block of at least 3 hours and a block of at least 9 hours. A 4-hour + 8-hour split doesn't comply because the second block is under 9 hours.
Worked Example: Split Rest on a Wait Day
A driver delivering to a site with a 4-hour unloading slot mid-shift:
- 07:00-11:00 — drive and first delivery (4 hours duty)
- 11:00-14:30 — first rest period, 3.5 hours (driver freely disposes of time during the wait)
- 14:30-19:00 — return leg and admin (4.5 hours duty)
- 19:00-04:00 next day — second rest period, 9 hours
Total rest: 3.5 + 9 = 12.5 hours, both blocks within the 24-hour cycle. Compliant. The driver turned dead waiting time into a valid rest period rather than logging it as availability and burning into their duty budget.
The Mistakes That Catch Small Operators
The daily rest rule generates a predictable set of infringements:
- The fourth reduced rest. A driver uses 9-hour rests on Monday, Wednesday, Friday — then takes a "quick turnaround" Saturday with another 9-hour rest. That's four, one over the limit, and it's the single most common daily-rest infringement.
- Rest started too late. The duty period runs long, the rest starts at 20:30, and the 24-hour window closes before 11 hours elapse. The driver took plenty of rest — just not enough inside the window.
- Splitting a reduced rest. Trying to split a 9-hour rest into smaller blocks. Only the regular rest can be split, and only as 3 + 9.
- Counting a short second block. A "split" where the second period is 8 hours, not 9. The whole rest then fails to qualify as a split daily rest.
- Forgetting the 24-hour clock resets on work-start, not midnight. Operators who think in calendar days miss the rolling window entirely.
Every one of these shows up on the tachograph, and every one feeds your OCRS score if a roadside check or operator visit catches it. They're exactly the kind of thing a tachograph analysis routine is designed to flag before DVSA does.
How to Plan a Compliant Day
For an owner-operator running 1-5 vehicles, three habits cover most of the daily-rest risk:
- Plan rest backwards from the 24-hour window. Note the work-start time, decide the duty length, and confirm there's room for 11 hours (or a planned 9-hour reduced rest) before the window closes.
- Budget reduced rests as three per week. Know which days you'll use them, and stop at three.
- Default to regular rest. Reduced and split rest are tools for specific situations, not the everyday pattern. The more you stay on 11-hour regular rests, the less you have to track.
A quarterly review against the O-licence compliance checklist catches drift before it becomes an OCRS-recordable event. And because rest infringements only become visible once the tachograph is downloaded, keeping to the download schedule in our tachograph downloads guide is what makes self-correction possible at all.