21 May 2026
4 min read
HMRC has launched a targeted advance assurance pilot for R&D tax relief claims. Find out who can apply, which high-risk areas HMRC will review in advance, and what this could mean for SMEs and advisers preparing claims.
HMRC has launched a new targeted advance assurance pilot for R&D tax relief claims, giving eligible SMEs the chance to seek certainty on up to two specific high-risk or complex areas before submitting a claim.
The service is designed to reduce uncertainty, improve compliance, and help businesses and advisers deal with common problem areas earlier in the process.
Why HMRC has introduced it
The pilot is part of HMRC’s wider effort to reduce error and fraud in R&D claims while improving the customer experience. It also responds to stakeholder feedback that the old advance assurance model was too narrow and too limited to be widely useful.
HMRC’s approach is intentionally targeted rather than comprehensive: instead of assuring an entire claim, the new service focuses on selected issues that commonly cause disputes. That makes it more flexible for SMEs, but it also means it is not a substitute for preparing a properly evidenced claim.
Who can apply
The pilot is open to SMEs that are carrying out, or planning to carry out, R&D in the accounting period for which assurance is being requested, provided they have not yet claimed R&D tax relief for that period. It is not available to large companies, or to businesses that have already applied for full claim advance assurance for the same period.
HMRC also excludes companies, or connected persons, where there is a DOTAS issue, a Corporate Serious Defaulter designation, or an open enquiry into a Corporation Tax return. Applications can be made by the company itself or by an authorised agent or adviser.
What HMRC will cover
The pilot allows assurance on up to two areas of a project, but only one project per application. The four areas available are whether the project meets the definition of R&D for tax purposes, whether overseas expenditure qualifies, whether contracted-out work qualifies, and whether the company qualifies for exemption from the PAYE and NIC cap.
That scope matters because it shows where HMRC sees the highest risk of misunderstanding. In practice, the service is likely to be most useful where a claim turns on technical borderline issues or on the treatment of specific categories of spend.
How the process works
HMRC says it aims to process applications within 40 calendar days, subject to receiving full and accurate information. Applicants need to provide basic company details, project information, forecast expenditure, the project duration, and details of the records held.
The application cannot be saved part-way through and no attachments can be added, so HMRC is clearly expecting concise, prepared submissions. If assurance is granted, HMRC will issue a confirmation letter and may request feedback on the pilot; if it is refused, the company cannot appeal or reapply for assurance on that matter.
Practical implications
For SMEs, the main benefit is greater certainty before filing a claim, especially on technically sensitive points that might otherwise attract enquiry. That could help businesses de-risk their claims and give advisers a more structured way to validate borderline positions.
At the same time, the pilot is deliberately limited, so it will not solve every problem in the R&D regime. A business can still claim without advance assurance, and a refusal does not prevent it from filing a claim through the Company Tax Return if it believes relief is due.
What advisers should watch
Advisers should think of the pilot as a pre-claim risk-management tool rather than a blanket endorsement of a project. The most valuable use cases are likely to be projects with overseas costs, subcontracting questions, or uncertain technical qualification, because those are areas HMRC has explicitly chosen to cover.
The pilot may also influence how clients document projects from the outset. If assurance is to be meaningful, advisers will want evidence, timelines, and cost tracking to align closely with the position presented to HMRC.
Conclusion
HMRC’s targeted advance assurance pilot is a significant development for R&D tax relief claimants, especially SMEs with complex or borderline claims. It will not replace robust claim preparation, but it does offer a useful route to greater certainty on specific points before submission.
Doug Reid, ABGi’s Tax Director, commented
“This pilot looks more like a narrow compliance exercise than a genuinely attractive new service. It only covers a small set of issues, still leaves many of the difficult areas in R&D claims untouched, and will only be useful if HMRC can process applications quickly and with technical consistency, which has often been the weak point in similar processes.
I’d also question how much demand there will really be. Businesses that already have advisers may see it as extra administration rather than a benefit, while smaller SMEs may lack the time or confidence to use it. So the risk is that the pilot helps a limited group of well-advised claimants, but does little to change the overall experience of the R&D regime.”