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HGV drivers' hours and tachograph rules

By Vadym Starynets, editor and publisher · Checked against gov.uk guidance on 25 September 2026 · How we work

Three sets of drivers' hours rules can apply to a lorry in the UK: the assimilated rules (what used to be called the EU rules), the AETR rules for some international journeys, and the GB domestic rules. Most lorries over 3.5 tonnes are under the assimilated rules and must use a tachograph. On top of those, the Road Transport (Working Time) Regulations 2005 limit total working time. This page sets out the limits drivers are actually checked against.

Which rules apply

Even a short period of driving under the assimilated rules brings the whole day under them.

Driving limits (assimilated rules)

LimitRule
Daily driving9 hours, extendable to 10 hours twice in a fixed week
Weekly driving56 hours in a fixed week (00:00 Monday to 24:00 Sunday)
Two-weekly driving90 hours in any two consecutive fixed weeks
Continuous driving4.5 hours, then a 45-minute break

Daily driving time is the driving between the end of one daily rest period and the start of the next (or a weekly rest).

The 45-minute break

After no more than 4.5 hours of driving, a driver must take a break of at least 45 minutes, unless a rest period starts. It can be split into 15 minutes followed by 30 minutes, spread over the 4.5 hours; the second part must be at least 30 minutes, so 30 then 15 does not count. Breaks under 15 minutes do not count towards a qualifying break. A qualifying break "wipes the slate clean": the next 4.5 hours start from its end. A break means no driving and no other work; periods of availability on a double-manned vehicle can count.

Daily rest

Example from the guidance: a driver who starts work at 06:00 on day 1 must have completed an 11-hour rest (or 12-hour split rest, or a permitted 9-hour reduced rest) by 06:00 on day 2.

Weekly rest

Working time (Road Transport (Working Time) Regulations 2005)

GB domestic rules

A goods vehicle driver under the GB domestic rules must not drive more than 10 hours in a day or be on duty for more than 11 hours in any working day (the duty limit does not apply on days you do not drive). Hours are recorded on a weekly record sheet or a tachograph. Driving under the assimilated rules counts towards these limits on mixed days.

Tachograph cards and records

Plan a shift against these limits with the drivers' hours calculator.

Questions

How long can an HGV driver drive in a day in the UK?
9 hours under the assimilated rules, extendable to 10 hours twice a week. Under the GB domestic rules the limit is 10 hours of driving and 11 hours on duty.
Can the 45-minute break be split?
Yes: at least 15 minutes followed by at least 30 minutes, within the 4.5 hours of driving. The 30-minute part must come second.
How many reduced daily rests can I take?
Up to three 9-hour reduced daily rests between any two weekly rest periods, with no compensation needed.
How many days of tachograph records must a driver carry?
The current day and the previous 28 calendar days, or 56 days if you drive internationally to or from the EU.
Is there an opt-out from the 48-hour week for lorry drivers?
Not for drivers under the assimilated or AETR rules: the Road Transport (Working Time) Regulations 2005 have no individual opt-out. Drivers under the GB domestic rules can opt out of the 48-hour average under the 1998 Regulations.

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