The renewal rule that stops your CP12 dates drifting

Here's a rule that quietly makes a landlord's or engineer's life easier. Before 2018, doing a gas safety check early reset the clock, so your renewal date crept earlier every year. The 2018 amendment fixed that.

How the window works

• Do the check any time from 10 to 12 months after the last one, and the renewal date stays 12 months from your original date.
• Do it earlier than 10 months, or late, and the date resets to 12 months from the actual check.
• So you can bring a check forward by up to two months for convenience without your annual date drifting.

It sounds small, but across a portfolio it's the difference between renewals landing on tidy anniversaries and slowly sliding into the wrong month. Track the next-due date, not the check date, and use the window when it suits you.