By Matthew Jones, Accelerated Growth Programme Gold Partner
If your business invests in research and development, R&D tax credits can provide significant financial relief. But a relatively new requirement is invalidating claims before they begin and it's easy to miss if you don't know to look for it.
What the pre-notification rule means in practice
Since April 2023, pre-notification has been mandatory for first-time claimants, and for any company that hasn't submitted a valid R&D claim in the three years preceding the pre-notification deadline. If your last claim was made within that three-year window, you're likely exempt. If it doesn't, or you've never claimed before, the rule applies to you.
The rule itself is simple: you must notify HMRC of your intention to claim within six months of your accounting period ending. If the rule applies to you and you miss that window, your claim is invalid, regardless of how much qualifying R&D work you've done or how much you've spent.
HMRC introduced the rule as part of its approach to reducing fraudulent and low-quality claims and engaging with businesses at an earlier stage. In practice, some businesses have missed the notification deadline, resulting in otherwise eligible claims being unable to proceed.
Why growth-stage businesses are most exposed
In the early stages of building a business, founders are focused on what matters most: developing new products, solving technical problems and proving concepts. That's exactly when qualifying R&D activity and expenditure tends to be highest, and it's also the period when technical uncertainty, a key qualifying criterion, is greatest.
As a result, some businesses may undertake substantial qualifying R&D before becoming aware of the claim notification requirement. In these cases, the requirement may only come to light when accounts are being prepared or external advice is sought, by which time the notification deadline for the relevant accounting period may have passed. From that point, they can only claim for current or future R&D.
What this looks like for businesses right now
We regularly speak to companies seeking R&D tax advice and often find that some of the highest levels of qualifying R&D expenditure relate to periods for which the notification deadline has passed. Depending on the level of qualifying expenditure involved, this can have a significant effect on the value of any subsequent claim.
Practical steps to protect your claim
If your business is currently undertaking qualifying R&D, or about to begin, act now:
- Find out whether pre-notification applies to your company and check when your notification window closes
- If it does apply, submit the notification to HMRC within six months from the end of your period of account.
- Engage an R&D tax specialist early, not after your first major development phase is complete
- Keep a clear record of qualifying activities and expenditure from the outset, so your claim is easier to evidence later
Engaging early gives you the best chance of meeting HMRC's requirements and making sure your claim is as robust as possible. Even if you're not planning to claim immediately, it's worth checking your notification position now because the window can close before you begin your claim preparation.