When should you submit an Advanced Notification Form?

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One of the most common issues we witness with R&D tax claims is clients forgetting to submit their Advanced Notification Form (ANF).

What is an ANF and why is it necessary?

The ANF requirement was introduced for businesses looking to claim R&D tax relief or the R&D Expenditure Credit (RDEC) for accounting periods beginning on or after 1 April 2023.

Your clients must submit an ANF if:

  • They have never made an R&D tax claim before.
  • They haven’t submitted an R&D claim in the past three years.

HMRC believe that the form will enhance compliance and ensure greater transparency.

What happens if you don’t submit an ANF?

Failure to file an ANF when required will result in an invalid claim, regardless of how legitimate the R&D activities are.

Businesses have a six-month window from the end of their accounting period to file an ANF.

So, with that in mind, if your client’s accounting period has ended within the last six months, now is the perfect time to reach out and confirm whether they intend to claim R&D tax relief.

When is your client’s ANF deadline?

The deadlines to notify HMRC of your client’s intention to claim R&D tax relief are as follows:

Accounting year endDeadline
30 September 202431 March 2025
31 October 202430 April 2025
30 November 202431 May 2025
31 December 202430 June 2025
31 January 202531 July 2025
28 February 202531 August 2025
31 March 202530 September 2025
30 April 202531 October 2025
31 May 202530 November 2025
30 June 202531 December 2025

If you are unsure when your client’s ANF is due, contact our R&D tax consultants for guidance.

How to submit an ANF

An ANF can be submitted either directly by the company or by you acting on their behalf.

To complete the process, you’ll need to provide key details about your client’s R&D activities to HMRC, including:

  • Company details – such as name, contact information, and tax reference.
  • An overview of the planned R&D projects – you must explain and demonstrate how they meet the qualifying criteria.

Our R&D tax specialists can help accountants assist their clients throughout the entire R&D tax relief process.

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

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