A step-by-step guide to building a maintenance system DVSA actually accepts: inspection intervals, what records to keep, who signs them off, and the 15-month rule that catches operators out.
Key Takeaways
- DVSA expects a documented maintenance system with set inspection intervals, a named responsible person, and records retained for at least 15 months.
- The starting point for most goods-vehicle operators is a 6-week safety inspection cycle, with mileage and operating conditions the main reasons to shorten or extend it.
- A safety inspection has to cover everything in the annual test, not just what the driver flagged that week.
- Driver walkaround checks and defect reports sit alongside the safety inspection cycle. Both are required, and DVSA reads them together.
- Get the records, the intervals, and the named responsible person right and most maintenance investigation visits become routine.
If you operate goods vehicles in the UK, your maintenance system is the thing DVSA checks first. They want to see how you decide a vehicle is safe to drive each morning, who signs that off, and where the paperwork lives. Get it right and a maintenance investigation visit is a tidy desk job. Get it wrong and you are looking at prohibitions, a Traffic Commissioner referral, and an O-licence in real trouble.
This guide walks through the system DVSA expects, in the order you would build it: the legal duty, the inspection cycle, the daily walkaround, the records, and the people. Every figure cited comes from the current DVSA Guide to Maintaining Roadworthiness or the operator licensing guidance on gov.uk.
If you hold an O-licence (or you are about to apply for one), this is the system you signed up to run when you ticked the maintenance promises on your application.
What does DVSA mean by a "maintenance system"?
DVSA defines a maintenance system as the set of arrangements that keep your vehicles roadworthy day to day, and the records that prove those arrangements work. It is more than a service schedule. It is the safety inspection interval, the driver walkaround check, the defect reporting route, the wheel and tyre management, the brake performance testing, and the records that tie all of it back to a named person.
The Guide to Maintaining Roadworthiness, last updated by DVSA on 28 April 2025, applies whether you do your own maintenance, contract it out, or run a mix. The guide is the document a DVSA examiner will check your operation against, so a sensible first step is reading the current version end-to-end.
The system does not have to be complex. A 5-van builder with a single mechanic can run a perfectly compliant system on paper or in a tablet app. What it cannot be is informal. If the inspection interval lives only in someone's head, DVSA treats it as not in place at all.
What inspection interval should you set?
Set a starting interval based on the vehicle, the mileage, and the work it does, then change it only when your defect history shows you should. For most goods vehicles the practical default is a 6-week safety inspection cycle. Light vans on low mileage may justify a longer interval; vehicles aged 12 years or older or doing arduous work need 6 weeks as a minimum and often shorter.
DVSA states that vehicles and trailers aged 12 years and over have a minimum safety inspection frequency of 6 weeks. For newer vehicles, the operator sets the interval based on their use. The interval you commit to has to be what you declared on the Vehicle Operator Licensing service when you applied for or last varied your O-licence.
Two real examples from DVSA guidance show how this works in practice.
Long-distance HGV on motorway work. A unit pulling box trailers up and down the M1, 100,000+ miles a year, sits at 6 weeks because the mileage is heavy and a defect missed for 8 weeks could cover 15,000 miles of running.
Local removal van on suburban streets. A removal company with a fleet of vans inspected every 4 weeks felt the cycle was too tight. They moved to 12 weeks. After 6 months they had a sharp rise in defects. They settled on 6 weeks and the defect rate matched the original 4-week pattern over the next year. (DVSA published this case study in the Guide to Maintaining Roadworthiness.)
The point is that the interval is a decision you can defend, not a number you copied. If you change it, write the reason in your maintenance file.
What goes into a safety inspection?
A safety inspection has to cover every item in the annual test, even the items the driver did not flag. DVSA's wording is direct: the scope of the inspection should at least include all the items covered by the statutory annual test and employ the methods of assessment prescribed in the respective inspection manuals.
That means the inspection sheet you use cannot be a 12-line walkaround tickbox. It has to map onto the annual test inspection manual for the vehicle category: HGV, PSV, or trailer. The DVSA inspection manuals are publicly available on gov.uk and most fleet maintenance suppliers issue inspection sheets that match them.
Three things often get missed by smaller operators:
Brake performance testing. A roller brake test or decelerometer reading should sit inside the safety inspection at the interval you declared, with the printout retained. A visual brake check on its own does not satisfy DVSA.
Wheel security. Re-torque after wheel removal and at scheduled intervals. Loose wheel nuts kill people, and DVSA treats wheel security as a top-tier serious defect.
Tyre tread and pressure. Recorded by axle, not by vehicle. The legal minimum on goods vehicles is 1mm across the central three quarters of the tread breadth and around the entire circumference, but the practical replacement point most fleets use is 2mm to allow buffer between scheduled checks.
If a contracted garage runs the safety inspection, the inspection sheet still has to come back to you and live in the vehicle file. "The garage has the records" is not a defence at a Traffic Commissioner public inquiry.
How do driver walkaround checks fit in?
Driver walkaround checks happen every working day, before first use of the vehicle. They sit alongside the scheduled safety inspection, not instead of it. DVSA reads them together: a clean walkaround log next to a safety inspection that found 8 brake defects tells the examiner the driver was not actually checking, or the route from check to repair was broken.
A walkaround check on a goods vehicle covers a fixed set of items: lights, indicators, mirrors, tyres, wheel security, fluids, leaks, body and load condition, brake function, and the driver's compartment. Autodue uses the standard 19-point check for vans and the standard 27-point check for HGVs, out of the box. The check sets are not configurable. They match the regulator's expected coverage so you do not have to build a checklist from scratch.
Three things make a walkaround log usable to DVSA, rather than a box-tick:
Date, time and vehicle registration. Every check, every day. A photograph of the vehicle plate at the start of the check is the cleanest proof.
A defect entry, even when there is no defect. "No defects found" written in by the driver and signed beats a blank field. Blank fields read as not done.
A traceable repair route. When a defect is reported, you need the report, the work that fixed it, the parts used, and the sign-off. A "rectified" tick on its own does not satisfy DVSA. The repair record has to name what was wrong and what was done.
For more on what a defect report is and why DVSA reads it before any other paperwork, see What Is a Defect Report and Why Does Your Fleet Need One?.
How long do you have to keep the records?
DVSA expects safety inspections, driver defect reports, and maintenance and repair records to be kept for at least 15 months. The 15 months runs from the date of the document, not from the date the vehicle left the fleet.
This is the figure most often missed by small operators. A binder cleared down at the end of the financial year is a binder that fails a maintenance investigation visit. The DVSA examiner takes the date of their visit, walks back 15 months, and asks for everything in that window: safety inspection sheets, defect reports, brake test prints, MOT certificates, and any work order records that show defects being rectified.
The records can be paper, scanned, or in a fleet system. The DVSA Guide to Maintaining Roadworthiness accepts digital records as long as they are tamper-evident and can be produced on demand. A spreadsheet of inspection dates with no underlying inspection sheets is not enough. The full sheet, with the inspector's signature or electronic equivalent, has to be retrievable.
Autodue stores the daily walkaround check, the defect report, and the photo evidence with a timestamp and a vehicle reg, and lets you export a PDF for any vehicle for any window inside that 15 months. See Paper vs Digital Walkaround Checks: Why Your Fleet Needs to Go Digital for the cost and audit comparison against paper.
Who has to sign off the system?
A named responsible person owns the maintenance system. For O-licence holders that is usually the transport manager. For non-O-licence operators (van fleets, light commercial work) it is the operations lead, the fleet manager, or the owner of the business. The point is that one person can be pointed to.
DVSA examiners will ask for that name and ask the named person to walk them through the system. The transport manager (or equivalent) must be able to state the established frequency of periodic maintenance for the fleet and show clear adherence to it. "Adherence" means the inspections actually happen on the dates declared, not within a fortnight of the dates declared.
The named person also owns three things DVSA looks for in any visit:
The maintenance plan. A written document listing every vehicle, its inspection interval, the date of the last inspection, and the date of the next.
The exception log. Inspections missed, deferred, or run late, with the reason written in, and the catch-up plan.
The trend review. A regular look at the defect data: which defects keep coming back, which vehicles or drivers are over-represented, and what was changed in response.
If you operate goods vehicles over 3.5 tonnes, the transport manager has to be of good repute and professionally competent. See O-Licence Explained: Does Your Business Need One? for what those terms mean and how DVSA tests them.
Common mistakes that cause DVSA findings
Over years of maintenance investigation visit reports, the same gaps appear again and again. They are worth checking your system against.
Inspection interval drift. A 6-week interval that becomes 7, then 8, then 9 because nobody is tracking the date. The DVSA examiner pulls the dates and counts.
Driver defect reports filed in the cab. A defect report has to leave the cab and reach the person who fixes things. Reports stuffed behind a sun visor are reports that did nothing.
"Verbal" sign-offs. A repair signed off by saying "yeah, that's done" with no entry on the work order. If it is not on paper or in the system, it did not happen, as far as DVSA is concerned.
Brake test gaps. Annual brake performance testing is the floor, not the ceiling. Most maintenance plans need a brake test inside every safety inspection, not only the test that goes with the MOT.
Records below 15 months. A fleet that has been running 18 months but only kept 6 months of records will get findings. The 15 months is a regulatory minimum, not a target.
For the wider compliance picture (driver hours, operator licence rules, traffic commissioner expectations), see Fleet Compliance for Small Businesses: A Complete UK Guide.
The bottom line
A maintenance system that satisfies DVSA is not complicated, but it has to be written down, run on the dates you said it would run, and produce records you can pull up 15 months later. The four parts to get right are the inspection interval, the safety inspection scope, the driver walkaround route, and the named responsible person.
If any of those four are informal, fix them this month. The cost of fixing them now is small. The cost of a Traffic Commissioner public inquiry triggered by a maintenance investigation finding is the size of your business.
Track every safety inspection, walkaround check, and defect report in one place with Autodue, free for your first van. Autodue walkaround checks | Autodue service management | Apple App Store | Google Play
Sources: DVSA Guide to Maintaining Roadworthiness · Goods vehicle operator licensing guide (gov.uk) · Maintenance investigation visit report (MIVR) guidance (gov.uk) · Operator Compliance Risk Score (OCRS) overview (gov.uk)