How to Get MCS Certified as a Heating Engineer: A Step-by-Step Guide
MCS — the Microgeneration Certification Scheme — is the UK accreditation for businesses installing renewable technology like heat pumps and solar. Without it, you can’t sign off Boiler Upgrade Scheme grants, and you won’t appear on the installer database homeowners use to find certified engineers.
More heating engineers are getting certified because the work is there: BUS grants have driven real demand for heat pumps, and customers are actively filtering for MCS.
This guide covers exactly what’s involved — qualifications, costs, the process, and how long it takes.
What is MCS certification?
MCS stands for Microgeneration Certification Scheme. It’s the UK industry standard for businesses that install renewable and low-carbon technology — heat pumps, solar PV, solar thermal, and similar systems. If a customer wants to claim a Boiler Upgrade Scheme (BUS) grant towards a heat pump installation, their installer must be MCS certified.
MCS is a separate scheme from Gas Safe. Being Gas Safe registered covers your gas work; it says nothing about your competence to install a heat pump. If you’re doing both, you need both.
Who actually needs MCS certification?
If you work exclusively on gas boilers, servicing, and gas safety certificates, you don’t need MCS. It’s not required for that work.
You need it if:
- You want to install air source heat pumps (ASHPs) or ground source heat pumps (GSHPs) and;
- Your customers want to claim a BUS grant (currently £7,500 for ASHPs)
- You want to appear on the MCS installer database, which homeowners use to find certified engineers
Many homeowners now specifically filter for MCS-certified installers before they’ll make an enquiry. Getting certified puts you in front of that demand.
What qualifications do you need before you apply?
MCS certification isn’t a course you attend. It’s an accreditation that recognises you already have the skills, and the skills required depend on which technology you’re applying to install.
All MCS installer companies must comply with MCS 025 — The Competency Standard. It applies regardless of technology, but within it the required NTP qualifications are technology-specific. A solar PV installer and a heat pump installer both meet MCS 025, but through entirely different qualifications. This article covers the heat pump route.
Heat pump qualifications
MCS requires evidence that your company has a Nominated Technical Person (NTP) for each technology you intend to install. The NTP is the individual responsible for the design, installation, commissioning, and handover of that technology — and it’s their competency that MCS 025 is assessing. The standard way to demonstrate NTP competency is completing an MCS-approved training course for the relevant technology.
The most widely accepted routes for heat pumps are:
- BPEC Level 3 Award in the Installation of Heat Pump Systems — the most common route for heating engineers making the move into renewables
- City & Guilds 6336 (Heat Pump Systems) — also widely accepted across certification bodies
Equivalent qualifications may also be accepted, but check before committing to a course. These typically take two to five days of classroom and practical training, and cost in the region of £800–£1,500 depending on the provider.
Note: if you plan to install air source heat pumps, you may also need F-Gas certification to legally handle refrigerants in split, rather than monobloc, heat pumps. Most domestic heat pumps will be monobloc heat pumps, and will therefore not require F-Gas certification. Check if you should get F-Gas certified here.
Quality Management System (QMS)
MCS requires you to demonstrate that you operate a Quality Management System — evidence of how you manage the quality of your installations. Despite the name, this doesn’t have to be a lengthy document or paid software. It just needs to be proportionate to your business size and show how you consistently deliver quality work.
Business readiness
You’ll also need public liability and professional indemnity insurance that explicitly covers renewable installations, and you’ll be expected to demonstrate relevant installation experience during the assessment process.
How to get MCS certified: the process step by step
Once your qualifications and QMS are in order, the certification process follows five main steps.
Confirm your qualifications and NTP are in place
Before submitting anything, make sure your heat pump qualification, insurance, and QMS all cover renewable work. Your NTP needs to be identified and their competency evidenced.
Join a Consumer Code
Before or alongside your certification body application, you must join a Consumer Code approved by the Chartered Trading Standards Institute (CTSI). There are two options: RECC (Renewable Energy Consumer Code) or HIES (Home Insulation & Energy Systems Quality Assured Contractors Scheme). Both are valid — contact each to compare costs and onboarding timelines for your business.
Choose a Certification Body and apply
MCS doesn't certify you directly — you go through an MCS-approved Certification Body.
Assessment and audit
Once your application is reviewed, you'll go through a technical assessment. This may be desktop-based (reviewing your documentation and systems), a physical site visit to inspect an installation, or both — depending on your certification body.
Approval and listing on the MCS database
Once approved, your business appears on the MCS installer database at mcscertified.com and you can start signing off on BUS grants.
Choosing your Certification Body
You don’t have to go with the most well-known name. Pick the certification body that suits your business type and budget.
How much does MCS certification cost?
The official MCS cost breakdown puts Year 1 at around £1,090 plus certificates (before training costs), with ongoing annual costs of around £890 plus certificates. Here’s how that breaks down, including pre-requisite training:
These figures are approximate. Get quotes directly from your chosen certification body and training provider before committing — costs shift and individual circumstances vary.
How long does MCS certification take?
Three to six months is a realistic expectation from scratch. The rough breakdown:
- Training and qualifications: 4–8 weeks, depending on course availability
- Consumer Code onboarding: 2–4 weeks
- Application preparation and submission: 1–2 weeks
- Certification body review and assessment: 2–6 weeks
What tends to slow things down in practice: course availability (some BPEC providers book up weeks in advance), getting insurance updated to explicitly cover renewables, QMS preparation, and documentation gaps flagged at assessment.
What MCS certification opens up
Once you’re on the register, the practical benefits are concrete.
Boiler Upgrade Scheme installs. The £7,500 BUS grant is only accessible through an MCS-certified installer. Customers who want the grant will filter their search to certified engineers — you either appear in that search or you don’t.
The MCS installer database. mcscertified.com is actively used by homeowners searching for local certified installers. Being listed puts you in front of customers who have already decided they want a heat pump and are specifically looking for someone qualified to fit it.
Higher-value work. Heat pump installations typically command a higher project value than a standard boiler swap. For many heating engineers, MCS certification is a deliberate move into a higher-margin revenue stream that isn’t entirely tied to gas work.
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Frequently asked questions
Do I need MCS certification to install heat pumps? There’s no legal requirement to be MCS certified to physically fit a heat pump. But if your customer wants to claim a Boiler Upgrade Scheme grant, the installation must be carried out by an MCS-certified business. In practice, most customers who are serious about a heat pump install want the grant, so MCS certification is effectively required for that market.
How much does it cost to become MCS certified? MCS puts Year 1 at around £1,090 plus per-installation certificates, before training costs. If you’re starting without the relevant qualifications, add £800–£1,500 for the heat pump course and up to £400 for F-Gas if you need it. Ongoing annual costs run to around £540–£890 plus certificates.
How long does MCS certification take? Three to six months from starting your training, assuming no significant delays. Course availability and Consumer Code onboarding usually account for most of the wait time.
What’s the difference between MCS and Gas Safe? Gas Safe registration covers your legal right to work on gas appliances. MCS certification covers your competence to install renewable and microgeneration technology. Completely separate schemes, separate registers, separate renewal processes. If you’re doing both gas and heat pump work, you need both.
What is Easy MCS? Easy MCS is an MCS-approved certification body built specifically for smaller businesses. It offers a more streamlined application process and lower annual fees than some of the larger providers. The certification is full MCS certification — being approved through Easy MCS puts you on the same register as any other certified installer.
Do I need F-Gas certification for MCS? F-Gas certification is not an MCS requirement — it’s a separate UK legal requirement for anyone handling refrigerants. If you’re installing air source heat pumps (which use refrigerant circuits), you need it regardless of MCS. If you’re only installing ground source heat pumps that use water/glycol circuits, it may not apply. Check with your training provider based on the systems you plan to install.