Choosing a Specialist R&D Tax Adviser
What an R&D tax adviser actually does
An R&D tax adviser starts by understanding your development work, then helps identify which activities may qualify for R&D tax relief. They work with you to determine the relevant expenditure, calculate the claim and document it to HMRC's required standard. A good adviser also supports you if the claim is later questioned. Here is what that involves, and how different adviser models compare.
What does an R&D tax adviser do, step by step?
At its simplest, the job is to turn your innovation work into a tax relief claim HMRC will accept. In practice that breaks into several distinct tasks.
- Assessing eligibility: deciding which of your projects meet HMRC's definition of qualifying R&D, which is narrower than most people assume.
- Identifying qualifying costs: the staff, subcontractor, software, consumable and other costs that can be included, and apportioning them appropriately.
- Writing the technical narrative: describing the scientific or technological advance you sought and the uncertainty you faced, in HMRC's terms rather than marketing language.
- Preparing the Additional Information Form (AIF): the mandatory submission that supports the claim, and making sure the figures reconcile with your company tax return.
- Filing or amending the return, and dealing with HMRC on the mechanics.
- Supporting you through a compliance check if one is opened, which is a separate skill from preparing the claim.
- Aftercare: keeping the approach current as the rules change and helping you build good habits for the next claim.
- Additional Information Form (AIF)
- The mandatory form that must accompany every R&D claim, setting out the projects, costs and technical detail HMRC needs to assess it.
The best advisers treat the people who did the work, your competent professionals, as central to the narrative rather than writing around them. HMRC increasingly expects to hear from them directly.
What are the different types of R&D tax adviser?
There are broadly two main types of business offering R&D tax services:
- Dedicated R&D tax specialists: Firms where R&D tax relief claims are the main or only service, or where other services are built around this. These firms may or may not employ tax advisers, accountants, engineers, scientists and sector specialists. Some support claims from project identification through to HMRC submission and provide HMRC enquiry defence support.
- Accountancy firms: Firms where R&D tax relief is one service among many tax-related services. This category ranges from large tax practices with dedicated R&D teams to general accountancy firms that prepare claims mainly for their existing clients.
Some firms sit between the two. Management consultancies and innovation funding providers, for example, may offer R&D tax relief alongside grants or wider business support. These usually sit closer to the first category unless R&D is only a very minor part of what they do.
Neither type is inherently better. What matters is the substance behind the label and the needs of your business, which is what the questions to ask a prospective adviser are designed to uncover.
- Tax adviser (HMRC's definition)
- HMRC uses 'tax adviser' in a wide sense, covering anyone who assists others with their tax affairs in the course of a business. Both of the above categories fall under this, whether or not a firm thinks of itself as an accountant or a specialist. That is why Adviser Radar lists specialist R&D consultancies and accountancy firms with a distinct R&D tax offering together, and assesses them on the same basis.
What separates a good adviser from an adequate one?
The gap usually shows in two places. First, at preparation: whether the claim is built on contemporaneous evidence and genuine technical input, or assembled quickly to a template. Second, under challenge: whether the adviser stands behind the claim, responds to HMRC properly and represents you, or goes quiet. Two claims prepared by different advisers that look similar on the day they are filed may fare very differently a year later, once HMRC starts asking questions.
How Adviser Radar helps
Once you understand what an adviser does, you can judge whether a given firm is equipped to do all of it. Adviser Radar brings together independent information on advisers so you can compare them on more than presentation. Start from the adviser search, and see Choosing a Specialist R&D Tax Adviser for the bigger picture.
Frequently asked questions
- Can I make an R&D claim myself?
- Yes. HMRC's processes allow the claim forms to be completed by a representative of the company or by an agent, and there is no requirement to use a specialist. However, the judgments involved, such as what counts as an advance in HMRC's eyes and precisely which costs can qualify, can sometimes depend on complex legislation and statutory definitions that are narrower than some realise. HMRC is clear that the facts of a claim remain the company's responsibility even where an adviser is involved, which is why many companies use an adviser to guide them and help minimise the risks of error.
- Is a percentage fee a red flag?
- No. Percentage or contingency fees are a common model for R&D claims and often include enquiry defence support that low fixed fees may not. Because they reward larger claims, it's sensible to ask how the firm prevents overclaiming (especially if commission-based sales staff are involved in the process) and what the fee covers in an HMRC enquiry. See the questions to ask a prospective adviser.
- How does HMRC define a tax adviser?
- Widely. HMRC takes this to include anyone who, in the course of a business, assists other persons with their tax affairs. That covers specialist R&D consultancies, accountancy firms, business advisers and consultants alike, whether or not they describe themselves as tax advisers. The definition sits in Schedule 38 to the Finance Act 2012, as amended by the Finance Act 2026, and HMRC's guidance on it is at CH176160 in the Compliance Handbook.
- Can an adviser help with Advance Assurance?
- Yes, though you don't need one. Advance Assurance (AA) lets you ask HMRC for its view before a claim is submitted, either through the long-standing full claim service for first-time SME claimants or a targeted pilot launched in May 2026 covering specific areas of a claim. A company can apply itself or through an agent, and some advisers will help you with the application process, so if AA is something you are considering, it's worth asking any firm you speak to whether they do.
Question about the platform or the Radar Assessment itself? See the FAQ.
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