If your fleet operates Heavy Goods Vehicles, staying on top of drivers' hours rules isn't optional, it's a legal requirement with direct consequences for road safety, driver welfare and your operator licence.
This guide covers everything fleet managers and transport operators need to know: daily and weekly driving limits, mandatory rest and break requirements, tachograph obligations, and the key regulatory changes that came into force in 2025.
What Are Drivers' Hours Rules?
Drivers' hours rules set out the maximum time HGV drivers can spend at the wheel each day, week and fortnight. They also specify the minimum breaks and rest periods required. The rules exist to prevent fatigue; one of the leading contributors to serious road accidents in the transport sector.
The rules that apply depend on where your vehicles operate:
- Domestic operations (within the UK): UK/EC drivers' hours rules apply
- International operations (UK-EU routes or journeys through non-EU AETR countries): AETR rules apply from 21 April 2025
Daily and Weekly Driving Limits
Daily driving limit
A driver may drive a maximum of 9 hours per day. This can be extended to 10 hours, but no more than twice in any single working week.
Weekly driving limit
Total driving time in any one week must not exceed 56 hours.
Fortnightly driving limit
Across any two consecutive weeks, total driving time must not exceed 90 hours.
Quick Reference: Driving Limits
- Daily limit: 9 hours (extendable to 10 hours, twice per week)
- Weekly limit: 56 hours
- Fortnightly limit: 90 hours across any two consecutive weeks
Mandatory Breaks
After 4.5 hours of driving, the driver must take a break of at least 45 minutes. This can be split into two parts: a minimum of 15 minutes followed by a minimum of 30 minutes - in that order.
Breaks must be taken during the driving period, not bolted on at the end as a substitute for a rest period.
Rest Period Requirements
Daily rest
Drivers must take at least 11 consecutive hours of daily rest. This can be reduced to 9 hours up to three times between any two weekly rest periods (no compensation required for these reductions).
Alternatively, daily rest can be split: a first period of at least 3 hours followed by a second of at least 9 hours, both within a 24-hour window.
Weekly rest
A minimum of 45 consecutive hours of weekly rest is required. This can be reduced to 24 hours no more than once between two regular weekly rest periods, but the shortfall must be compensated within three weeks.
2025 Update: What Changed for International Operations
From 21 April 2025, the legal framework for international HGV journeys shifted. Drivers of vehicles over 3.5 tonnes on international routes between the UK and EU, or transiting non-EU AETR signatory countries, must now comply with AETR (European Agreement Concerning the Work of Crews of Vehicles Engaged in International Road Transport) rules.
In practice, the driving limits and rest periods under AETR are largely the same as the UK/EC rules. The key differences are:
- Drivers are no longer required to return to their home base or country of residence after four consecutive weeks away
- Reduced weekly rest periods can only be compensated at a fixed location, not in a vehicle cab
- Drivers must now carry 56 days of tachograph records on international journeys: up from the previous 28 days
For domestic-only operations, nothing has changed. These updates apply only to international journeys.
Tachograph Requirements
All HGVs over 3.5 tonnes must be fitted with a tachograph to record driving time, rest periods and periods of availability. The main types in use are:
- Digital tachographs: Store data on driver cards and in the vehicle unit memory
- Smart tachographs Gen 2: The current standard, capable of remote data transmission to enforcement agencies
Vehicles fitted with a first-generation smart tachograph should have been upgraded to Gen 2 before 18 August 2025. Vehicles with a Gross Vehicle Weight between 2.5 and 3.5 tonnes have until 1 July 2026.
Tachograph data must be retained for at least 12 months. Operators are required to download and review data regularly, at least every 28 days for driver cards and every 90 days for vehicle units, to identify and address breaches before they escalate.
Penalties for Non-Compliance
The DVSA and police conduct roadside checks and can issue fixed penalty notices on the spot. For drivers and operators alike, non-compliance can result in:
- Fixed penalty fines for individual breaches
- Vehicle prohibition until defects or issues are resolved
- A worsened Operator Compliance Risk Score (OCRS), increasing the frequency of targeted DVSA checks
- Referral to the Traffic Commissioner, which can lead to suspension or revocation of your operator licence
In serious cases, unlimited fines and prosecution can follow. The risk to your licence and business reputation makes proactive compliance management essential.
How to Stay Compliant
For most fleet operators, ongoing compliance comes down to consistency: clear processes, trained drivers and reliable systems. Practical steps include:
- Ensuring every driver understands the rules and their personal legal responsibility
- Downloading and reviewing tachograph data at regular intervals
- Using scheduling systems that build in driving limits before routes are confirmed
- Acting on infringements promptly and keeping documented records of any remedial action
Need support with tachograph management?
H-TEC provides expert, independent tachograph management services for fleet operators across the UK. From data downloads and infringement analysis to driver briefings and compliance reporting, we help you stay on top of your obligations without the admin burden.
Find out more about our tachograph management services: https://h-tec.co.uk/what-we-do/tachograph-management/
This guide is for general information purposes. Rules are subject to change - always refer to the latest DVSA guidance or seek professional advice for your specific operations.
