Commercial PAT Testing London: Costs, Rules & Booking
Every business in London that uses electrical appliances has a duty to keep them safe, and commercial PAT testing London is how most businesses meet that obligation. Whether you run a busy office, a restaurant, a retail shop, or a warehouse, regular portable appliance testing protects your staff, your customers, and your business from liability if something goes wrong.
But booking PAT testing for a commercial property raises practical questions. How much should you actually pay? How often do appliances need testing? And what are the legal requirements you need to follow? Getting clear answers matters, because overpaying or undertesting are both common problems, and both are avoidable with the right information.
At Electrical Testing London, we carry out commercial PAT testing across London, Greater London, and the South East, with fully qualified engineers who have a minimum of 10 years' experience. This guide breaks down the real costs, the rules that apply to your business, and exactly how to book a service that fits your schedule and budget.
What commercial PAT testing covers
Commercial PAT testing is a structured inspection and testing process applied to electrical appliances used in a business environment. Unlike a domestic PAT test carried out in a private home, commercial testing typically covers a larger volume of equipment spread across multiple departments, floors, or sites. It combines a visual check with electrical tests carried out using calibrated equipment, and the results are documented so you have a clear record of compliance.
The appliances that get tested
When a PAT testing engineer visits your premises, virtually any electrical item that uses a plug falls within scope. The exact list depends on what your business uses, but the most common categories across London commercial premises include:
- Computers, monitors, keyboards, and printers
- Power tools and hand-held equipment
- Kitchen appliances such as kettles, microwaves, and toasters used by staff
- Extension leads and multi-socket adaptors
- Portable heaters and fans
- Projectors, displays, and audio-visual equipment
- Charging stations and battery-powered equipment with plug-in chargers
Fixed appliances that are hardwired into the building, such as panel heaters or built-in ovens, fall outside the scope of PAT testing and are instead covered by your Electrical Installation Condition Report (EICR). If you are unsure which category an item falls into, a qualified engineer can advise you on the day.
What the engineer actually does
A PAT test is not just a sticker on a plug. The engineer carries out a visual inspection first, looking for signs of physical damage to the cable, plug, casing, or connectors. A frayed cable or a cracked plug body can fail this stage before any electrical testing begins, which is where the most obvious hazards are often caught.
The visual inspection alone identifies a significant proportion of faults, which is why skipping it in favour of a quick digital test is not considered best practice by competent engineers.
After the visual check, the engineer runs a series of electrical tests using a calibrated PAT tester. These typically include an earth continuity test for class I appliances, an insulation resistance test, and sometimes a functional check to confirm the appliance operates as intended. Each appliance receives a unique asset label, and the results are logged to a digital or printed report you keep for your records.
What a pass and fail mean
When an appliance passes, it receives a dated pass label and is recorded in the test register. This does not mean the item is guaranteed to stay safe indefinitely, which is why periodic retesting matters, but it does confirm that on the date of inspection the appliance met the required safety standard.
A fail result means the appliance must be taken out of use immediately. Continuing to use a failed item exposes your staff to risk and weakens your legal position if an incident occurs. Depending on the fault, the engineer may be able to carry out a simple repair such as replacing a fused plug on the spot, or they may advise that the item needs further assessment or disposal. For commercial PAT testing London businesses, keeping a clear record of both pass and fail results is essential for demonstrating due diligence to insurers and enforcement bodies.
UK rules, responsibilities, and certificates
There is no single law in the UK that specifically mandates PAT testing by name, but several pieces of legislation place a clear legal duty on employers and landlords to maintain electrical appliances in a safe condition. Understanding how these rules apply to your business is the first step to staying compliant and avoiding enforcement action.
The legislation that applies to your business
The Electricity at Work Regulations 1989 is the primary regulation you need to know. It requires that all electrical systems, including portable appliances, are maintained to prevent danger. The Health and Safety at Work Act 1974 supports this by placing a general duty on employers to provide a safe working environment. For commercial premises used by employees, regular PAT testing is widely accepted by the Health and Safety Executive as the practical way to demonstrate compliance with both.
Failing to maintain electrical appliances is not just a regulatory risk. It can invalidate your employer's liability insurance if an incident occurs and a claim is made.
Who carries the responsibility
Employers are responsible for the electrical safety of appliances used by their staff on business premises. If you manage a workplace in London, that responsibility sits with you, regardless of whether the equipment belongs to the business or has been brought in by employees. Commercial PAT testing London businesses commission regularly is one of the clearest ways to show you have taken that duty seriously. Property managers and landlords of commercial premises also carry responsibility under the Provision and Use of Work Equipment Regulations 1998, which requires that work equipment, including electrical items, is suitable, maintained, and inspected.
The documentation you receive after testing
After testing is complete, a qualified engineer provides a test register that lists every appliance inspected, its result, and the date of testing. This document is your evidence of due diligence. Some providers also issue a PAT testing certificate as a summary document for your records. There is no standardised government certificate format, but the register itself carries legal weight. Keep these records accessible, as insurers and enforcement officers may request them, and losing them weakens your position considerably if a dispute or incident arises.
How often to test in a commercial setting
The UK does not set a universal testing interval in law, which means the frequency of testing is left to the employer's judgement, based on the type of environment and the risk level of the equipment. The Health and Safety Executive publishes guidance that links testing intervals to how appliances are used, how often they are handled, and the conditions they operate in. Getting this right matters, because testing too rarely creates a compliance gap, while testing unnecessarily often wastes budget without improving safety.
Risk-based intervals for different workplaces
The most practical framework is one that ties testing frequency to the risk category of the environment. A laptop used at a fixed desk in a quiet office poses far less risk than a power tool used daily on a construction site. The HSE guidance reflects this, and most qualified engineers use a similar approach when advising clients. The table below outlines the recommended testing intervals for common commercial settings:
| Environment | User check | Formal visual inspection | Combined inspection and test |
|---|---|---|---|
| Offices and low-risk workplaces | Before each use | 12 months | 48 months |
| Schools and educational buildings | Before each use | 12 months | 48 months |
| Hotels, restaurants, and hospitality | Before each use | 6-12 months | 12-24 months |
| Construction sites and industrial premises | Before each use | 1-3 months | 3-12 months |
| Healthcare and high-use environments | Before each use | 6 months | 12 months |
These intervals are guidance, not fixed legal requirements, so you should always apply your own risk assessment and take advice from a qualified engineer if you are unsure.
When to test outside your regular schedule
Several situations should trigger an unscheduled PAT test regardless of where you are in your testing cycle. If an appliance has been dropped, damaged, or exposed to water, it needs inspecting before it goes back into use. The same applies to second-hand equipment brought onto your premises, equipment returning from a long period of storage, and any items that have been modified or repaired. For businesses that commission commercial PAT testing London-wide across multiple sites, building these trigger points into your internal processes alongside a regular schedule is the most reliable way to maintain continuous compliance without gaps.
Commercial PAT testing costs in London
PAT testing prices in London vary quite a bit depending on who you hire and what your premises require, so going in with a realistic budget prevents you from overpaying or accepting a quote that looks suspiciously cheap. For commercial properties, pricing is almost always calculated on a per-appliance basis, which means the final bill depends mainly on how many items need testing rather than a flat site fee.
What affects the price you pay
Several variables push the cost up or down. The volume of appliances is the biggest driver: most providers offer a lower per-item rate when you have a large number of items, because the engineer can work efficiently without moving between widely spaced locations. The type of equipment also matters, since some items such as three-phase tools or IT equipment with multiple components take longer to test and may carry a small surcharge. Other factors include how spread out your premises are, whether you need testing outside standard business hours to avoid disrupting operations, and whether same-day or urgent booking is required, which typically adds a premium.
Providers who quote significantly below the market rate often offset this by rushing the testing process, skipping thorough visual inspections, or producing certificates without completing proper electrical tests.
Typical pricing in London
For commercial PAT testing London businesses commission on a regular cycle, the table below gives you a realistic guide to current market rates. These figures are approximate and based on standard office and commercial environments, so your actual quote may differ based on the factors covered above.
| Number of appliances | Typical cost per item | Estimated total |
|---|---|---|
| 1-50 items | £2.50-£4.00 | £125-£200 |
| 51-150 items | £1.80-£2.50 | £90-£375 |
| 151-300 items | £1.20-£1.80 | £180-£540 |
| 300+ items | £0.80-£1.20 | £240+ |
A retesting fee may apply if a failed appliance returns for re-inspection after repair, though this is usually modest. Always confirm with your provider whether the test register and certificate are included in the quoted price, as some companies charge separately for documentation. That adds to your overall cost without delivering any additional safety benefit, so it is worth clarifying before you agree to anything.
Choosing a provider and booking in London
Finding the right company for commercial PAT testing London businesses rely on comes down to a handful of practical checks rather than going with whoever appears first in a search result. The quality of the engineer, the accuracy of the documentation, and the ease of scheduling all affect whether the service actually delivers what your business needs.
What to look for in a provider
Any provider you consider should employ engineers registered with a recognised body such as the NICEIC or who hold relevant City and Guilds qualifications in electrical testing. Ask directly whether the person attending your site will have verifiable credentials, not just someone using a borrowed tester. Experience in commercial settings specifically matters too, because a domestic-focused tester may underestimate the volume or complexity of equipment across an office or hospitality venue.
A legitimate provider will always be willing to share their engineer qualifications and explain their testing process before you commit to a booking.
You should also check that the provider carries adequate public liability insurance and that their test equipment is calibrated to a recognised standard. Ask whether the certificate and test register are included in the quoted price, and confirm the format so you know the documentation will satisfy your insurer or any enforcement officer who requests it.
How to book and prepare for the visit
When you contact a provider, give them an accurate appliance count upfront so they can allocate enough time and provide a reliable quote. If you do not have an exact figure, walk through your premises and estimate by room or department. Underestimating the count often leads to an incomplete test on the day, which leaves you with a gap in your compliance record.
Scheduling the visit at a time that minimises disruption is worth thinking through before you pick up the phone. Many engineers are available outside standard business hours for an additional fee, which suits hospitality venues or businesses that run around the clock. On the day itself, make sure staff know not to move appliances around and that access to all areas including storerooms and kitchens is available from the moment the engineer arrives, so the job runs without unnecessary delays.
Next steps
You now have everything you need to approach commercial PAT testing London with confidence. The key points are clear: which regulations apply, what the engineer tests, how frequently different business types need retesting, and what reasonable pricing looks like across varying appliance volumes. Knowing this upfront means you can book the right service at the right price without second-guessing the process.
The practical next move is to get a quote based on your actual appliance count and the type of premises you operate from. Electrical Testing London carries out commercial PAT testing across London, Greater London, and the South East, with fully qualified engineers who have a minimum of 10 years' experience on every job.
Ready to book or want to talk through your specific requirements before committing? Request a quote from Electrical Testing London and a member of the team will get back to you with clear pricing and available dates.
