by Sam Swansborough
Business Tax Director
3 December 2025
Articleby Sam Swansborough
Business Tax Director
The merged R&D tax relief scheme introduces a new definition for contracted out R&D, which has significant implications for businesses engaging third parties to undertake research and development on their behalf.
What has changed?
Previously, the legislation did not define “subcontractor” or “contracted out” R&D, creating uncertainty and the potential for disputes. HMRC previously argued that R&D carried out under commercial contracts was ineligible, but tribunals disagreed.
In cases such as Quinn (London) Ltd and Collins Construction, the tribunals ruled that fulfilling a client contract does not automatically mean R&D is subcontracted or subsidised unless the client specifically required and funded the R&D. These decisions exposed the lack of clarity in the old rules and prompted the introduction of a statutory definition under the merged scheme.
The merged scheme addresses this by:
The new definition
The legislation now defines when R&D is considered “contracted out” if:
Essentially, the new definition focuses on the intention at the time of contracting, not hindsight. A business should consider both the contract terms and surrounding circumstances to determine who initiated the R&D and for whose benefit it was carried out.
Examples
Key actions: To align with the new definition, businesses should carefully review their contracts to ensure roles, responsibilities, and risks are clearly set out and documented. This will help establish who is entitled to claim and provide the necessary evidence should HMRC request further information. By understanding the new definition and structuring agreements accordingly, companies can maximise their R&D tax relief claims and avoid costly misunderstandings.
To download the full merged R&D tax relief scheme document, please click here.
If you wish to discuss this in further detail, please contact one of our Business Tax experts here.