R&D Pre-Notification Calculator
Miss the notification deadline and you lose the right to claim for the entire year. Answer a few quick questions to find out whether you need to tell HMRC in advance, and the exact window to do it.
Why Pre-Notification Matters
For accounting periods beginning on or after 1 April 2023, many companies must tell HMRC they intend to claim R&D tax relief before they file. This is a hard deadline, and there is no appeal if you miss it.
A strict six month window
The notification deadline is six months after the end of the period of account. Once it passes, the claim for that year is gone.
Catches first time claimants
If you have never claimed before, or your last claim was more than three years ago, you almost certainly need to notify HMRC in advance.
Easy to get wrong
The rules around previous claims, amendments and the reform date are easy to misread. This tool applies them for you.
Check Your Notification Deadline
Enter your accounting period and tell us about any previous claims. Nothing is stored, and you get an instant result.
This calculator handles a single accounting period of up to 12 months. For a longer period of account, test each accounting period separately.
Not sure what your result means?
Book a free consultation and one of our R&D specialists will walk you through your notification position and what to do next. We handle the paperwork so you never miss a deadline.