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Gas safety certificate due date calculator

Enter the date of the last landlord gas safety check and see when the next one is due, the earliest date to book it without losing days, and the deadline for giving the tenant a copy. Free, no sign-up.

Enter the date of the last check to see when the next one is due, when to book it, and when the tenant must have their copy.

The rules the calculator applies

  • A landlord gas safety check is due every 12 months, carried out by a Gas Safe registered engineer on every gas appliance, flue and the pipework the landlord provides.
  • A check done in the two months before the current certificate expires keeps the same expiry date the following year, so booking early loses no days. This has applied since 6 April 2018.
  • A check done earlier than that two-month window, or after the certificate has expired, starts a fresh 12 months from the date of the check.
  • Existing tenants must be given a copy of the record within 28 days of the check. New tenants must have a copy before they move in.
  • Each record must be kept for two years.

These come from Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998, as amended in 2018, and apply in England, Wales and Scotland.

Common questions

How often does a landlord need a gas safety certificate?

Every 12 months. Under Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998, a landlord must have every gas appliance, flue and the pipework they provide checked by a Gas Safe registered engineer at least once every 12 months. The engineer issues a Landlord Gas Safety Record, often called a CP12.

Can I do the gas safety check early without losing days?

Yes, if it is within two months of the deadline. Since 6 April 2018, a check carried out in the two months before the existing certificate expires keeps the same expiry date the following year, like an MOT. A check done earlier than that, or after the deadline, starts a fresh 12 months from the date of the check.

When does the tenant need a copy of the gas safety record?

Existing tenants must be given a copy within 28 days of the check. New tenants must be given a copy before they move in. The landlord must keep each record for two years.

What happens if the gas safety check is overdue?

The landlord is in breach of the Gas Safety Regulations from the day after the certificate expires. It is a criminal offence, enforced by the Health and Safety Executive, and a landlord who has not given the tenant the required gas safety record is on the back foot in any possession proceedings. Book a Gas Safe registered engineer straight away; the new certificate runs 12 months from the date of that check.

Does the gas safety check cover the tenant's own appliances?

No. The landlord's duty covers the appliances, flues and pipework the landlord provides. A gas cooker the tenant brought with them is the tenant's, though the landlord remains responsible for the pipework and the flue serving it, and many engineers will check it at the same visit if asked.

What if the property has no gas?

Then no gas safety certificate is needed. The duty applies where the landlord provides gas appliances, flues or pipework. A property with no gas supply still needs the electrical installation inspected at least every five years and working smoke alarms on every storey.