Gas Safe Registration: How to Get on the Register

If you want to work on gas appliances and pipework in the UK, you need to be on the Gas Safe Register. It isn't optional, and it isn't quick — there's training, assessment, paperwork and an annual cost to keep it live. The good news is the route is well-trodden, and once you understand the steps it's far less daunting than it first looks.

This guide walks through who needs to register, the qualifications you'll need, how the application works, roughly what it costs, and how to stay on the register year after year.

Why Gas Safe Registration Matters

Gas Safe Register is the official list of businesses and engineers who are legally allowed to carry out gas work in Great Britain, the Isle of Man and Guernsey. It replaced CORGI back in 2009.

By law, anyone carrying out gas work — installing a boiler, servicing an appliance, fitting a cooker, working on gas pipework — must be Gas Safe registered for that specific type of work. Working on gas without registration is a criminal offence, and the penalties are serious.

It's also a commercial necessity. Customers, letting agents and insurers all expect to see a valid Gas Safe ID card before they let you near their appliances. No registration, no work.

Tip: Your registration is tied to specific work categories (boilers, cookers, fires, commercial catering and so on). You can only legally do the work you're assessed and registered for — so plan your assessments around the jobs you actually want to win.

Who Needs to Be on the Register

You need to register if you carry out gas work as a business — whether you're a sole trader or a limited company employing engineers.

A few points that trip people up:

• The business registers, and each engineer registers. A company holds a registration, and every gas engineer working under it must be individually qualified and listed.
• Employed engineers are covered through their employer's registration, but they still need their own qualifications and ID card.
• Sole traders register as the business and the engineer in one.

If you're employed by a registered firm, your employer handles the business side. If you're going out on your own, you're responsible for the whole process.

The Qualifications You Need First

You can't apply to Gas Safe until you hold a recognised gas qualification. For most domestic engineers, that means the ACS (Accredited Certification Scheme) assessments.

ACS covers a core unit (CCN1 for domestic) plus appliance-specific modules such as:

• CENWAT — central heating boilers and water heaters
• CKR1 — cookers
• HTR1 — gas fires and wall heaters
• MET1 — gas meters

There are two common routes to being assessment-ready:

1. Managed Learning Programme (MLP) — a longer training course for people new to gas, often combined with on-site experience and a portfolio.
2. ACS direct — for those already qualified in a related trade (for example, experienced plumbers) who can go straight to assessment after a shorter top-up.

Rules and accepted routes change, so check the current requirements on the official Gas Safe and ACS provider sites before booking anything. Don't assume a route someone took a few years ago still applies.

If you're weighing up the wider career path into heating, our guide on becoming a heating engineer and the training routes breaks down the options in more detail.

How the Application Works, Step by Step

Once you hold valid ACS certificates, the registration itself is fairly straightforward:

1. Gather your evidence. You'll need your ACS certificates, proof of identity, business details and your work categories.
2. Apply to Gas Safe Register. Applications are made directly through Gas Safe. New businesses typically go through an initial assessment process.
3. Pay the fees. There's an application/registration fee plus ongoing annual fees (more on cost below).
4. Inspection. New registrations usually involve an inspection of your work and records by a Gas Safe inspector to confirm standards.
5. Get your ID card. Once approved, you'll receive your Gas Safe ID card showing your licence number, photo and the work categories you're qualified for.

Always carry your ID card on site, and don't be surprised if customers check it — many now scan the QR code or look you up on the Gas Safe website.

What Gas Safe Registration Costs

Costs vary depending on how many engineers you register and the categories you cover, so treat the following only as a rough guide and confirm current figures with Gas Safe directly.

As a rough guide, expect:

• ACS training and assessment to run into hundreds, sometimes a few thousand pounds, depending on whether you take a full MLP or a shorter top-up route.
• An annual Gas Safe registration fee for the business, plus a per-engineer element.
• Renewal of ACS every five years, as the certificates are time-limited.

It adds up, so factor it into your pricing. If you're setting day rates and job prices around these overheads, it's worth getting your numbers straight — our piece on how to price a job for profit covers building those costs into every quote.

Staying on the Register and Renewing

Registration isn't a one-and-done. To stay live you'll need to:

• Pay your annual fee to keep the registration current.
• Renew ACS every five years for each work category — miss the deadline and you lose the right to do that work until you're reassessed.
• Pass Gas Safe inspections. Inspectors carry out checks on registered engineers, looking at work quality and your records.
• Keep your records and certificates in order, including any notifications such as building regulations notices for notifiable work.

This is where the admin can bite. Between ACS expiry dates, annual renewals, inspection records and the Gas Safety (or CP12) certificates you issue to customers, there's a lot to track.

A job-management system like Gaffer keeps your customer records, certificates and service history in one place, and can automatically remind customers when their annual gas safety check or boiler service is due — so you keep the work and they stay safe. If you service the same properties year after year, automating those rebookings is a quiet earner; see how to automate annual gas service reminders.

It also means that when an inspector or a customer asks for paperwork, you're not digging through a van full of carbon-copy pads — it's all stored and searchable.

FAQs

How long does it take to get Gas Safe registered?

It depends on your starting point. If you already hold valid ACS certificates, registration itself can be relatively quick — often a few weeks including the initial inspection. Getting qualified from scratch via a managed learning programme can take many months, so plan well ahead.

Can I do gas work while I wait to get on the register?

No. You must be Gas Safe registered before carrying out any gas work for which you need to be registered. Working on gas without registration is illegal, so don't take on gas jobs until your registration is confirmed and you hold a valid ID card.

How much does Gas Safe registration cost per year?

There's an annual registration fee for the business plus a per-engineer element, and these change over time. Treat any figure you see as a rough guide and confirm the current fees directly with Gas Safe Register before budgeting.

Do I need to renew my ACS qualifications?

Yes. ACS certificates are valid for five years for each work category. You must be reassessed before they expire, otherwise you lose the right to carry out that type of gas work until you requalify.