Landlord gas safety certificate (CP12): the dates and renewals

If your rented property has gas, an annual gas safety check is one of your core legal duties as a landlord in England. The record it produces is often called a CP12. Here is what it is, when it is due, the renewal trick that keeps your date stable, and what you need to give your tenants. This is general information, not legal advice, so check the official HSE and GOV.UK guidance for the detail that applies to you.

What the CP12 actually is

Under the Gas Safety (Installation and Use) Regulations 1998, landlords must have every gas appliance, flue and piece of pipework they are responsible for checked for safety once every 12 months. The check has to be carried out by an engineer on the Gas Safe Register. The document you receive afterwards is the Landlord Gas Safety Record, widely known as a CP12. It confirms the check was done and lists what was inspected.

It is a safety check, not an efficiency rating. It says nothing about how well your boiler heats the home, only that the gas appliances are safe to use.

When it is due, and the renewal window

The check is annual, so it is due within 12 months of the last one. There is a helpful rule that catches many landlords out in a good way: under HSE's "MOT-style" arrangement, you can generally have the check carried out up to two months before the anniversary without losing your original due date, as long as you keep evidence of the previous check date. In other words, if your date is the 1st of June, you can have the engineer round any time in April or May and your next deadline still lands on the 1st of June. That means you can renew early to fit an engineer's diary without your renewal date drifting earlier each year. Check the current HSE guidance for how the window works.

What to give your tenants, and when

• Existing tenants: a copy of the record within 28 days of the check.
• New tenants: a copy before they move in.
• Keep your own copies for at least two years, which is the legal minimum. Many landlords keep them longer to evidence a history of checks.

Handing the record over on time is part of the duty, not an optional extra, so it is worth having the document to hand rather than buried in a drawer.

What happens if you miss it

Failing to meet gas safety duties is a criminal offence. The penalties depend on the circumstances and can range from fines to, in serious cases, imprisonment, so see the HSE and GOV.UK guidance rather than assuming a fixed outcome. There is also a knock-on effect worth knowing about: as Section 21 is removed under the Renters' Rights Act 2025, up-to-date safety records can matter for possession too, because a missing or late document can cause delays. In short, the annual gas check is one date you really do not want to let slip.

How to never miss the date

The check itself is quick. The hard part is simply remembering it a year later. Keeping the record in one place, with a reminder before the date falls due, turns it from a nagging worry into a small annual task. VEYLO X is built for that: it keeps your gas safety record and its renewal date together, and reminds you ahead of the date you have added. It is a record-keeping tool, not a substitute for the check or for legal advice, and the responsibility to arrange the check stays with you.