56 day tachograph change: Driver working time rules for UK operators

56 day tachograph change: Driver working time rules for UK operators

You must keep goods vehicle drivers within a 10 hour daily driving limit, an 11 hour daily duty limit, and an average 48-hour working week, though a single week can run to 60 hours if the average holds. These limits come from two overlapping frameworks: GB domestic or assimilated drivers’ hours rules, and the Road Transport (Working Time) Regulations. Get either wrong and DVSA has the evidence trail to prove it.

TL;DR:

• Drivers under GB domestic rules can drive up to 10 hours daily and work 11 hours, but exceeding these can breach combined driving and working time limits.
• The 48-hour weekly working time average, calculated over 17 to 26 weeks, is strict, with no opt-out, and a 60-hour maximum in a single week is allowed if balanced across the period.
• Drivers must take at least a 45-minute break after 4.5 hours of driving, and separate working time breaks depend on daily hours worked, with breaks needed every 6 hours.
• Accurate record-keeping of tachograph data and proper monitoring of reference periods are critical to avoid violations and operator sanctions.
• Properly flagging and managing night work, shifts crossing rule thresholds, and maintaining compliance systems reduces breach risks and supports transparent audits.

Table of Contents

• What are the driver working time rules and which limits apply?
• Breaks and rest periods: what drivers must take and when
• Working time regulations in practice for mobile workers
• GB domestic rules vs assimilated and AETR rules: which applies and what’s changed
• Record keeping and tachograph requirements: what to keep and for how long
• Exemptions, special cases and periods of availability
• Enforcement, penalties and operator culpability
• A practical compliance checklist for operators and transport managers
• Why strict record keeping and operator systems matter
• How Operatorcompliance keeps your drivers within these limits
• Sources
• FAQ

What are the driver working time rules and which limits apply?

Two separate rulebooks govern a driver’s day, and confusing them is the single biggest source of compliance errors we see across UK fleets. Drivers’ hours rules control time spent driving. Working time rules control everything a driver does for the employer, including loading, cleaning, paperwork, and waiting.

The numbers that matter most:

• Daily driving limit: 10 hours for goods vehicles under GB domestic rules; assimilated (EU-derived) rules allow 9 hours, extendable to 10 hours twice a week.
• Daily duty limit: 11 hours under GB domestic rules, applying when a driver’s daily driving does not exceed 10 hours (there’s no duty limit at all under assimilated rules, which work on driving and rest periods instead).
• Weekly driving limit: 56 hours under assimilated rules, never exceeding 90 hours across any two consecutive weeks.
• Working time ceiling: an average of 48 hours a week, calculated over a reference period, with a hard cap of 60 hours in any single week.
• Night work limit: 10 hours of work in any 24-hour period that includes night work, unless a workforce agreement extends it.

These figures apply differently depending on the vehicle and journey type, which is exactly why so many transport managers get tripped up. A driver on GB domestic rules working a 10 hour driving day still has to fit within the 11 hour duty ceiling. A driver under assimilated rules driving 9 hours has no duty limit as such, but faces stricter rest requirements instead. Both driver types are bound by the same 48 hour average working time rule regardless of which drivers’ hours regime applies to their driving.

Pro Tip: Don’t assume a driver who stays under the daily driving limit is automatically compliant. A driver can hit 9 hours of driving and still breach working time rules through excessive loading, waiting, or admin time stacked on top.

Where operators fall down most often is at the fortnightly level. A driver who runs close to 56 hours of driving in one week has almost no room to repeat that the following week without breaching the 90 hour fortnight cap. Roster planning has to look two weeks ahead, not one.

Breaks and rest periods: what drivers must take and when

Drivers face two independent break requirements that frequently get merged into one in a transport office, and that confusion causes real infringements. The drivers’ hours break rule says a driver must take at least 45 minutes after 4.5 hours of accumulated driving, and that break can be split into a 15 minute break followed by a 30 minute break, taken in that order.

The working time break rule is separate and applies to total hours worked, not just driving:

• Breaks must be at least 15 minutes in duration.
• When total working time is between 6 and 9 hours, breaks must total at least 30 minutes.
• When total working time exceeds 9 hours, breaks must total at least 45 minutes.
• Drivers must not work more than 6 consecutive hours without a break.

The overlap trips people up because a break that satisfies the drivers’ hours 45 minute requirement will usually also count towards the working time break requirement, provided the driver is genuinely free from all duties during it. A break spent supervising a tail-lift unload doesn’t count as a break under either rule, because the driver isn’t free to do as they please.

Take a driver who starts at 06:00, drives 4.5 hours to a delivery point, takes a 45 minute break, then spends 2 hours on multi-drop unloading before driving again. That single 45 minute break satisfies both the driving break requirement and the 30 minute working time break needed for a shift running 6 to 9 hours. But if the same driver’s day stretches past 9 hours total, they’ll need a further break to reach the 45 minute working time threshold, because one 45 minute break only covers the lower band.

Pro Tip: Log periods of availability separately from breaks in your record-keeping system. Waiting time at a loading bay where a driver can’t leave the vehicle unattended rarely counts as a genuine break, even if it feels like downtime.

Working time regulations in practice for mobile workers

The 48 hour average working week is calculated over a reference period, normally 17 weeks, extendable to 26 weeks where a workforce agreement permits it. This averaging mechanism is what allows an operator to run a driver at 60 hours during a peak week without breaching the rules, provided the surrounding weeks compensate.

Here’s how the calculation plays out in practice:

1. Establish the reference period. Most operators default to 17 weeks unless a collective or workforce agreement extends it to 26 weeks.
2. Total the hours worked across every week in that period, including driving, loading, cleaning, and administrative duties.
3. Divide by the number of weeks to find the average. If that average sits at or under 48 hours, a single 60 hour week within the period is lawful.
4. Flag any week approaching 60 hours as an automatic trigger to check the rolling average, not just that week in isolation.
5. Reset the tracking at the end of each reference period rather than waiting for an annual review, because breaches accumulate silently otherwise.

A driver working 42 hours a week for 16 weeks, then 60 hours in week 17, averages 43.1 hours across the period, comfortably compliant. But that same 60 hour week bolted onto a run of 50 hour weeks pushes the average past the ceiling fast, and most rostering spreadsheets don’t flag it until it’s already happened.

Night work carries its own separate restriction. A worker is considered to be doing night work if any part of their shift falls within a defined night period; for goods vehicle drivers this tightens the permissible working period to 10 hours in any 24 hour spell that includes night work, unless a workforce agreement allows a longer period. This catches out operators running early trunk routes that start before 04:00 without realising the shift now counts as night work.

There’s no opt-out from the 48 hour average for mobile workers who fall under assimilated or AETR drivers’ hours rules, unlike some other sectors where individual opt-out agreements are possible. Domestic rules leave slightly more flexibility in places, but the employer always keeps a duty to secure adequate rest regardless of what’s signed.

An occasional mobile worker, someone who normally works from a fixed base but occasionally drives, still falls under working time rules whenever they’re performing mobile work, and that status needs recording so their hours don’t quietly disappear from the compliance picture.

GB domestic rules vs assimilated and AETR rules: which applies and what’s changed

Picking the right rulebook comes down to vehicle type, journey destination, and vehicle weight, and getting it wrong means applying the wrong daily limits entirely. GB domestic rules generally apply to goods vehicles under 3.5 tonnes doing UK-only work, certain specialist vehicles, and journeys wholly within Great Britain that fall outside assimilated rules’ scope.

Assimilated rules (the retained EU drivers’ hours framework, sometimes still called EU rules) apply to most goods vehicles over 3.5 tonnes and passenger vehicles carrying more than 9 people, whether the journey stays within the UK or crosses into the EU. AETR rules apply on international journeys that pass through non-EU countries that are AETR signatories.

A short decision route:

• Vehicle under 3.5 tonnes, UK-only work? GB domestic rules likely apply.
• Vehicle over 3.5 tonnes, journey entirely within GB? Assimilated rules generally apply.
• Journey crosses into the EU? Assimilated rules apply for the EU leg and often the whole journey.
• Journey passes through a non-EU AETR country (Switzerland, Turkey, parts of the Balkans)? AETR rules govern that leg.
• Certain exempted vehicles (breakdown recovery, some agricultural or military use) may fall outside both frameworks entirely.

The Drivers’ Hours and Tachographs (Amendment and Modification) Regulations 2025 updated the legal basis for these rules on international journeys and introduced a requirement to hold 56 days of tachograph data for some HGVs travelling between the UK and EU, replacing the standard 28 day window for those specific journeys. This is one of the most consequential changes operators have faced since Brexit reshaped cross-border haulage documentation, and plenty of fleets running mixed domestic and international work still haven’t updated their retention settings to match.

Record keeping and tachograph requirements: what to keep and for how long

Every driver whose daily driving exceeds 4 hours needs written records unless a tachograph is fitted and used correctly, and for most goods vehicles over 3.5 tonnes that means the tachograph is doing the legal heavy lifting. Digital and smart tachographs must be calibrated at an approved centre, carry intact seals, and have their data downloaded on a schedule that keeps evidence within legal reach.

What examiners expect to see at roadside or during an operator audit:

• Current day plus the previous 28 days of driver activity data as the standard baseline.
• 56 days of tachograph data retained for HGVs used on qualifying international journeys between the UK and EU under the 2025 rule changes.
• Weekly record sheets for drivers exempt from tachograph use, showing hours worked, driven, and rest taken.
• Vehicle unit downloads at intervals that don’t allow data to be overwritten, typically every 90 days for the vehicle and 28 days for driver cards.
• Calibration certificates proving the tachograph has been checked within the required interval.

Tachograph records that can’t be produced for the required period are treated as serious infringements, capable of affecting an operator’s good repute and their access to the market. That’s not a paperwork technicality. A traffic commissioner reviewing repeated missing-record failures can and does treat it as evidence the operator has lost proper control of its licence.

The most common inspection failing isn’t a missing record at all, it’s a late download. A vehicle unit that goes past its download interval doesn’t just risk overwritten data, it signals to an examiner that the operator’s monitoring routine has gaps. Fixing this usually means setting an automated reminder well before the legal deadline rather than relying on someone remembering. Tools built around tachograph download rules can flag an overdue download before it becomes an inspection finding.

Exemptions, special cases an