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How to track gas safety renewals

Track the next-due date for every property in one place, not the check date. Set reminders ahead of each deadline, use the two-month early-check window to batch nearby renewals without your dates drifting, and keep records for at least two years. Automating the reminders is what stops a growing portfolio slipping.

Reviewed by Jordan Valentine-Dunn, Gas Safe registered engineer · Portsmouth Gas Heating · Last reviewed July 2026

Every lapsed gas record has the same biography: the check happened on time for years, then a property changed hands, a reminder lived in someone's head, and a date slid past unnoticed. Tracking renewals well isn't sophisticated. It's one number per property, watched by something that never gets busy.

Which date should you actually track?

The next-due date, not the check date. The number that matters for compliance is when the next check is due. Record that per property and everything else follows: you can see at a glance what's coming up, what's overdue, and what can be brought forward.

How do you set the tracking up in the first place?

In an afternoon, honestly. List every property with gas, then find the most recent record for each: your files, the inbox, the letting agent, and failing those the engineer who did the check, who keeps a copy and can usually reissue it. Enter each property's next-due date, sort by soonest, and act on what the list tells you. Anything already lapsed gets booked today; anything inside the 10-to-12-month window goes on this month's batch; everything else waits its turn. A property with no findable record gets a fresh check, which is cheaper than the uncertainty. The afternoon is the whole cost, and it's paid once. After that the list only needs feeding when a check happens or a property arrives.

What does a renewal system that holds up look like?

  • One list of every property with its next-due date, sorted so the soonest is on top.
  • Reminders that fire well ahead, for example 60, 30 and 7 days out, then overdue, so nothing sneaks up.
  • Use the 10-12 month early-check window to group renewals in the same area into one trip, without resetting the anniversary date.
  • Deliver the new record to the tenant within 28 days and keep the old one for at least two years.

How does the 10-to-12-month window help?

It turns renewals from fixed appointments into flexible ones. Because a check done any time from 10 months after the last one preserves the anniversary date, you get a two-month window to play with, and that window is what lets you group nearby properties into one trip, dodge the tenant's holiday, or pull a December renewal into November when diaries are kinder. Renew earlier than 10 months and the date resets, so the window is the tool; outside it, you're trading the anniversary for the convenience.

What about the tenant who won't let the engineer in?

Access is the reason renewals need slack. You're expected to take all reasonable steps to get the check done: offer specific dates, in writing, and keep every attempt on file, because that paper trail is your defence if the record lapses through no fault of yours. Start the difficult properties at the top of the window, not the bottom; ten weeks of runway absorbs a lot of rescheduling. The access guide covers the escalation in detail.

Who should own the renewal date, landlord, agent or engineer?

Legally the duty sits with the landlord unless a management contract clearly hands it to the agent, so the landlord should always know where the dates live. Practically, the healthiest arrangement is overlapping: the agent tracks the portfolio they manage, the engineer's system chases the renewals they carried out, and the landlord can see the position without asking anyone. Overlap is a feature here, because renewals lapse in gaps, not in overlaps. If an agent manages the property, get who books the check and who holds the records in writing, and ask to see the certificates rather than assuming. And an engineer who chases your renewal before you remember it isn't being pushy; that reminder is one of the most reliable signs of an engineer whose paperwork you can trust.

When does a spreadsheet stop being enough?

At roughly the point you stop opening it. A spreadsheet holds next-due dates fine; what it won't do is chase anyone, notice the property that was added without a date, or answer a landlord's “can you resend that certificate” at nine in the evening. Manifold's renewal lifecycle does the chasing itself, flags what's inside the early window, and gives landlords and agents a portal where every record is findable in seconds, which is the difference between compliant and “I meant to book that one”.

What routine keeps a portfolio's renewals clean?

Review the list on a schedule

Monthly for a growing portfolio, quarterly at minimum. Anything due within 90 days goes on the action list; anything lapsed goes to the top of it.

Book inside the window

Batch nearby properties into shared visits from 10 months after their last check, so the anniversary dates hold.

Chase difficult access first

The properties that slip are the ones where getting in is hard. Start those earliest, in writing, with specific dates offered.

Deliver and file

Tenant copy within 28 days, landlord copy sent, and the record stored where it can be produced in seconds for at least two years.

However good the tracking, the check itself can only be carried out by a Gas Safe registered engineer, and only their record counts. This is general guidance on staying organised, not legal advice on a specific tenancy.

Frequently asked

How far ahead should I book gas safety renewals?

You can carry out the check up to two months before the deadline (from 10 months after the last check) and keep your original renewal date. Booking a few weeks ahead of that window gives you slack for access problems or reschedules.

What's the best way to track CP12 renewals for a portfolio?

Keep one dated list of all properties and automate the reminders. Manual tracking works for a handful of properties but tends to slip as you grow; software that flags due and overdue renewals removes the memory dependency.

How long do I keep expired gas safety records?

At least two years by law. Keeping a longer history is sensible, and it evidences a property's ongoing compliance and is easy to do when records are stored in a system rather than a filing cabinet.

Who tracks renewals when a letting agent manages the property?

Whoever the management contract says, which is exactly the problem: if it's vague, each side assumes the other has it. The legal duty stays with the landlord unless the contract clearly transfers it, so agree in writing who tracks the dates and books the checks, and ask to see the records rather than assuming.

What reminders should I set for a gas safety renewal?

Work back from the deadline: a reminder when the property enters the 10-month early window, another at 30 days, another at 7, then an overdue alert that won't shut up. The early ones buy booking flexibility; the late ones are the safety net for access problems and cancellations.

Last reviewed July 2026. This guide is general information, not legal or safety advice, gas safety work must be carried out by an appropriately Gas Safe registered engineer. Rules can change, so check the linked official sources for the current position.

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