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AAB / Blog / New merged R&D Scheme: What’s changed?
BLOG24th Jul 2025
By Chris Webster
or reach out to a member of our Corporate Tax, Tax team.
There’s been no shortage of headlines about the UK’s new merged R&D Scheme. However, for many businesses, the real impact is only just beginning to be felt. R&D tax claims follow the end of the accounting period, so it’s only now, as companies start compiling claims for periods beginning on or after 1 April 2024, that the practical implications of the new rules are becoming clear.
Now is the time to revisit what’s changed, understand how it affects your business, and take action to ensure your subsequent claim is both compliant and optimised.
This new scheme replaces the previous SME and RDEC regimes with a single, unified framework. However, there is of course a twist: loss-making, R&D-intensive SMEs (where qualifying R&D expenditure is 30% or more of total expenditure) can still access a more generous form of relief under the Enhanced R&D Intensive Support (ERIS) regime, which offers relief worth up to 27% of qualifying costs.
For everyone else, the new scheme functions like the old RDEC – a taxable, above-the-line credit at 20% of qualifying expenditure. That means:
One of the most significant and potentially confusing changes under the Merged Scheme is the redefinition of “contracted out” R&D. This impacts who is eligible to claim relief when a third party conducts R&D.
Under the new rules, the right to claim rests with the party that:
Under the new rules, relief is generally only available for expenditure on contracted-out R&D and Externally Provided Workers, where:
This could materially reduce the value of claims for companies that rely on global R&D teams or offshore contractors. We recommend that businesses:
With the new rules now in force, here are our five steps to stay ahead:
Our Innovations Tax team can provide expert support to ensure your business is compliant.
While the merged scheme is a bold step toward simplification, it does, in practice, introduce new layers of complexity. For some businesses, it grants lower relief but tighter compliance. For others, it could open the door for new claim opportunities.
At AAB, we have a wealth of experience in supporting clients to prepare robust and successful R&D Tax claims. If you have any questions about how the new merged R&D scheme rules might affect you, please do not hesitate to get in contact with Chris Webster, a member of our Innovations Tax team or your usual AAB contact.
How AAB can help
Tax covers a broad and complex area of tax legislation, so we provide a suitably broad and comprehensively experienced team to support your business with pragmatic, commercial advice. Businesses of all sizes and types, and across a wide range of sectors, benefit from our comprehensive corporate tax compliance and advisory service. We have exceptionally knowledgeable tax teams distributed across our offices, ready to support you with their wealth of experience and expertise. We can manage your global tax exposure with a coordinated response that saves you having to seek advice from separate advisors.
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Innovations Tax Partner