Attention September 2025 year-end companies – Submit your ANF before the end of March!

If this is your client’s first time claiming R&D tax credits (or they have not claimed in the last three years), they have to notify HMRC within six months of their year-end.

What does this mean?

If your client has a financial year-end in September 2025, the Advanced Notification Form (ANF) deadline is March 31, 2026 – it will be here before you know it!

Even if your client has conducted legitimate R&D activities, failure to submit the ANF when required will invalidate the claim.

ANF deadlines in 2026

Here are the deadlines to notify HMRC about your client’s intention to claim R&D tax relief:

Don’t miss your client’s ANF deadline! Contact our team today for expert R&D support.

Adam Bointon