A question we hear regularly from clients is which assessment do they actually need for their machinery — a CE/UKCA assessment or a PUWER assessment — and just as often, a client asks for one when, on closer inspection, the other is what’s more appropriate. The two are often used almost interchangeably, but they answer different questions, sit under different legislation, and lead to very different scopes of work. For anyone responsible for machinery in an industrial setting, understanding the distinction — and knowing which one applies to their situation — can save a great deal of wasted time and money, and more importantly, close the right compliance gap.
CE/UKCA Marking Is About Placing Machinery “On the Market”
CE and UKCA marking exist under the Machinery Directive, the Supply of Machinery Safety Regulations 2008, and, more recently, the Machinery Regulation. Their focus is the machine itself at the point that it enters the market or operation: has it been designed, built, and documented to meet the essential health and safety requirements set out in the legislation.
For an end user of machinery, this becomes directly relevant the moment they import equipment from outside the EU or UK or when they manufacture machinery for their “own use”. Whoever brings non-CE/UKCA-marked machinery into service becomes, in the eyes of the legislation, the party “placing it on the market” — and with that comes full legal responsibility for its compliance. This applies whether the machinery is bought from an overseas OEM or brought in through any other route that bypasses a compliant UK or EU supply chain, including manufacturing in house.
“Own Use” Machinery Is Not An Exemption
One of the most commonly overlooked aspects of this legislation is that it also applies to machinery built or modified for a companyʼs own internal use.CE/UKCA Marking vs PUWER: What Machinery End Users Actually Need1
It’s a natural assumption that if you’re not selling a machine on, CE/UKCA marking doesn’t apply to you. That assumption is wrong.
The Machinery Directive is explicit on this point: Article 2(i) states that anyone who designs or manufactures machinery for their own use is legally recognised as the “manufacturer” of that machine, and must comply with the same requirements as any commercial manufacturer — including CE marking. The Supply of Machinery Safety Regulations 2008 carry the identical obligation in Part 1, 2.2, and the Machinery Regulation restates it in Article 318b. So if a business modifies a machine, builds a bespoke rig, or integrates equipment for use on its own site, it has effectively become the manufacturer of that machine under the law, with the marking obligations that come with it.
Taken together, this means anyone who imports machinery that isn’t CE/UKCA marked, or who builds or substantially modifies machinery for use in their own facility, and does not bring that machinery into compliance, is failing a legal requirement — regardless of whether the machine is ever sold on.
PUWER Covers How Machinery Is Used, Not How It Was Built
PUWER — the Provision and Use of Work Equipment Regulations — sits on the other side of this relationship. It places duties on end users to ensure that the equipment they use is suitable, safe, and properly managed throughout its working life. This includes areas that CE/UKCA marking does not touch at all: operator training, ongoing maintenance, and restrictions on who is permitted to use a given piece of equipment.
Crucially, PUWER Regulation 10 requires that equipment used at work complies with the “essential requirements” of the legislation relevant to its placing on the market — in effect, that’s CE/UKCA-relevant legislation. So while PUWER doesn’t set out to police the technical file behind a machine, it does require, as a matter of law, that the machine an end user is operating is itself CE/UKCA compliant. The two frameworks are linked rather than separate: PUWER assumes CE/UKCA compliance as a baseline and builds the ongoing safe-use obligations on top of it.
Demonstrating Due Diligence
If PUWER requires end users to ensure their machinery is CE/UKCA compliant, the practical question becomes: how does an end user actually satisfy themselves of that, without redoing the manufacturer’s job?
The simplest starting point is trust in the supplier, backed up by the paperwork that compliant machinery is legally required to carry — the Declaration of Conformity DoC. Every CE/UKCA compliant machine must be supplied with one, and it’s the natural first port of call for due diligence. Whether that’s sufficient on its own comes down to how much confidence the end user has in the supplier or OEM’s track record.
Where the DoC looks incomplete, inconsistent, or where something about the machine’s safeguards doesn’t sit right, it’s reasonable to dig a little further. An end user can ask the supplier about the process they followed to achieve compliance, though it’s worth being clear that the OEM has no legal obligation to provide the design or manufacturing documentation itself — that right lies with market surveillance (e.g. HSE, OPSS. Commissioning a full CE/UKCA assessment is an option too, but it only makes sense if the OEM is willing to engage with the findings. If they’re not, the end user is left either holding a report with nowhere to go, or effectively taking on manufacturer-level responsibility for the machine themselves — and this can be very difficult, as the certification requires the technical design documentation, which the OEM is unlikely to provide.
In practice, this leaves end users with a fairly clear decision: if machinery isn’t CE/UKCA marked, or if there is genuine doubt about the compliance behind that marking, the choice is to either reject the machinery or take active steps to close the compliance gap.
Why the Two Assessments Cost Differently
Budget inevitably plays into these decisions, and it’s worth understanding why a PUWER assessment of a machine is typically cheaper than a full CE/UKCA assessment. A PUWER assessment doesn’t need to interrogate the depth of technical documentation the way a CE/UKCA assessment does — PUWER Regulation 10 only requires that the machine be CE/UKCA compliant, not that the assessor verify specific technical documentation against specific harmonised or designated standards. CE/UKCA compliance, by contrast, is built around a much more clearly defined framework of standards, and assessing against it requires that depth of technical review.
This difference shows up in who typically carries out each type of work. PUWER assessments are often conducted by general health and safetyCE/UKCA Marking vs PUWER: What Machinery End Users Actually Need3 practitioners, while CE/UKCA assessments more often call for engineers with the technical background to evaluate design documentation against specific standards.
The Practical Reality
It would be naïve to assume that all machinery in use across UK and EU industry is fully CE/UKCA compliant. In practice, it rarely is — and where it falls short, it’s most often the operation and maintenance manual that’s incomplete, usually because documentation is the last thing finished in a project and the first thing to slip. It can also fall short in the management of manufacturing documentation, in the documented assessment against the CE/UKCA essential health and safety requirements, and documenting compliance with EMC legislation is often also missing, as is RoHS. Many end users are, knowingly or not, operating machinery with gaps in its compliance, having weighed the operational risk against the cost and disruption of addressing it.
That said, cutting corners on paperwork is a different matter from cutting corners on primary physical safeguarding measures. Whatever view a business takes on its compliance risk appetite, the principle that legislation is attempting to focus on still holds: employees should never be placed in situations where they are unduly exposed to foreseeable or known hazards. Compliance status and genuine operational safety aren’t always the same thing, but they should never be allowed to drift too far apart.
Choosing the Right Assessment
If in doubt, start by asking what question actually needs answering. Is it “was this machine built correctly and is it fit to be placed on the market / put into service” — that’s a CE/UKCA question. Or is it “are we using, maintaining, and staffing this machine safely on an ongoing basis” — that’s PUWER. Most machinery situations call for PUWER as the default ongoing obligation, with a CE/UKCA assessment reserved for cases where the marking is missing, the Declaration of Conformity doesn’t stand up to scrutiny, or the end user has effectively become the manufacturer through import or modification. Getting that distinction right at the outset is what keeps assessments proportionate, and compliance efforts pointed at the risks that actually matter.
