Gas Safe registration: who needs it, what it costs, how to apply

Gas Safe Register replaced CORGI in 2009 as the UK’s official register for gas engineers. If you install, maintain, repair or service gas appliances commercially, you must be on it. No exceptions.

Who needs to be registered

• Heating engineers installing or servicing gas boilers
• Plumbers working on gas pipework
• Gas fitters working on cookers, fires, water heaters
• Commercial kitchen engineers
• LPG engineers (separate register category)

Unregistered gas work is a criminal offence under the Gas Safety (Installation and Use) Regulations 1998. Maximum penalty: £20,000 fine or 6 months in prison. Insurance won’t cover you; customers can sue.

What you need to register

1. Core gas qualifications (CCN1 or equivalent). You need nationally accredited gas safety training — Accredited Certification Scheme (ACS) is the most common route.
2. Appliance-specific tickets. CENWAT (central heating, water heaters), CKR1 (cookers), HTR1 (fires), MET1/2/4 (meters). You register only for what you’re certified to work on.
3. Public liability insurance — usually £2m minimum.
4. CRB/DBS check for working in homes.
5. Tools — gas analyser, manometer, leak detector, etc.

The training route

Two main paths:

• Managed Learning Programme (MLP) — 4–6 weeks of full-time training if you’re new to gas. Around £6,000–£8,000.
• Experienced Worker Route — if you’ve been gas-plumbing for years without registration (e.g. worked for a company), you can take the ACS assessments directly. Around £1,500–£2,500.

You retake ACS every 5 years. Ticket-specific reassessments vary.

Registration fees (2026)

• Initial registration: £355 (sole trader)
• Annual renewal: £215 (sole trader)
• Additional engineers on a company registration: extra per-engineer fees

Prices rise most years; check gassaferegister.co.uk for current. Registration covers one calendar year.

What registration gives you

• A Gas Safe ID card with your photo, registration number, and the appliance categories you’re authorised for. You must show it to customers on request.
• Listing in the public Gas Safe directory so homeowners can find you.
• Legal ability to issue Gas Safety Certificates (CP12s) for landlords.
• Access to the Benchmark installation commissioning logbook for gas appliances.

Landlord CP12 certificates

If you service a boiler or check gas appliances in a rental property, the landlord needs a Gas Safety Record (commonly called CP12) every 12 months. Only Gas Safe registered engineers can issue them. Charge: typically £60–£120 per property for the inspection.

What happens if you work on gas unregistered

• HSE investigation
• Criminal prosecution
• Personal civil liability if something fails
• No insurance payout
• No way to legally commission installs (homeowner can’t get warranty claims honoured)

It’s not worth the risk. The ACS route pays for itself in the first year of gas work.

Making the paperwork disappear

Gas Safe number prints on every Holdfort invoice automatically once you register it. CP12 landlord certificates via voice note ("CP12 for [address]") become a minute-long job instead of half an hour with a paper book. See Holdfort for gas engineers →

Approved Certification Scheme (ACS) — route and providers

The ACS is the gateway qualification suite for gas engineers. You need the correct ACS tickets for the appliance types you want to work on. The big test centres in the UK:

• BPEC Assessments — nationwide centres, one of the oldest. Full ACS reassessment costs around £1,800-£2,400 in 2026.
• City & Guilds Qualifications 6189 — integrated with NVQ Level 3 for new entrants.
• Logic Certification — favoured for experienced-worker route and focused reassessments.
• Kiwa-sponsored centres — growing network with flexible scheduling.

The ticket system works like this: CCN1 (Core Domestic Gas Safety) is mandatory for any domestic gas work. Then you add appliance-specific tickets: CENWAT (central heating + water heaters), CKR1 (cookers), HTR1 (fires), MET1/2/4 (meters). For each ticket you’re certified on, it appears on your Gas Safe ID card.

Reassessment every 5 years. Ticket-specific reassessments vary from 3-5 years depending on scheme.

Public liability insurance specifics

Gas Safe won’t accept you as a business without £2 million public liability cover minimum. Most gas engineers carry £5 million because the cost difference is small (£200-£400/year for the jump) and commercial clients frequently demand £5 million as standard.

Specialist insurers for gas engineers: Simply Business, Tradesman Saver, Hiscox, NFU Mutual. Expect £300-£600/year for £5m public liability + £500k-£1m professional indemnity combined. Claims-made basis means you need to keep a policy in force even after you stop working, for at least 6 years, to cover claims that emerge from past work.

Annual renewal workflow

Gas Safe registration runs as a calendar year (1 January to 31 December). You’ll get an email reminder in November:

1. Log in to your Gas Safe account portal.
2. Confirm your registered details (business name, address, appliances, engineers if you have employed fitters).
3. Upload proof of continuing insurance for the coming year.
4. Pay the renewal fee: £215 (sole trader as of 2026; prices rise most years).
5. Your ID card auto-renews and arrives by post within 2 weeks.

If you miss renewal, you fall off the register on 31 December. Any gas work you do from 1 January without renewal is illegal — fines up to £20,000 and a criminal record.

CP1 / CP12 / CP42 — which certificate when?

• CP12 — Landlord’s Gas Safety Certificate. Annual for rented properties. Covers all gas appliances and flues in the property.
• CP1 — Single Appliance Service Record. For individual boiler services where no landlord compliance is needed.
• CP42 — Commercial Catering Gas Safety Record. For commercial kitchens; requires CoNGU-qualified engineer.
• CP4 — Boiler Inspection Record. Used for pre-purchase or insurance inspections.
• Gas Warning Notice — issued when an appliance is "At Risk" (AR) or "Immediately Dangerous" (ID). Must be signed by tenant/owner and reported to RIDDOR if ID.