As a Chartered Tax Advisor with over 20 years of experience, I have seen the Research and Development (R&D) tax relief regime evolve significantly. In 2025, it remains one of the most valuable incentives available to innovative UK businesses, but the rules have changed.
R&D tax relief rewards businesses that push the boundaries of science and technology. It reduces the cost of innovation and can return much-needed cash to growing businesses. For many early-stage companies, this support provides vital funding to reinvest in product development, hiring, and scaling.
From 1 April 2024, the government merged the two previous schemes (the SME scheme and the RDEC scheme) into a single Merged R&D Expenditure Credit.
20% expenditure credit on qualifying R&D costs, equating to around 15% net benefit for profit-making companies
Enhanced support up to 27% payable credit for companies spending 30%+ of total costs on R&D
Claims now possible even on grant-funded projects - restriction removed from April 2024
The definition of R&D has not changed. HMRC still expects projects to aim for an advance in science or technology and to involve uncertainty that a competent professional cannot easily resolve.
Most overseas subcontractor and worker costs are no longer eligible unless the work must be done abroad for legal or regulatory reasons.
In the past, if your R&D project received grant income or other subsidies, your company often lost access to the more generous SME scheme and had to claim under the less valuable large company scheme.
The good news is that from April 2024 this restriction has been removed. You can now claim R&D tax relief on projects even if they have been part-funded through grants. This change provides welcome clarity and ensures that innovative SMEs do not lose out simply because they also secured external funding.
For loss-making companies, cash repayments are capped at £20,000 plus 300% of the company's PAYE/NIC bill. There are exemptions for businesses that are creating and managing their own intellectual property.
If this is your first claim, or if you have not claimed in the previous three years, you must notify HMRC within six months of the end of the accounting period in which you intend to claim.
HMRC has tightened its review process, with more claims being scrutinised. It is vital to keep clear technical records, project notes, and cost breakdowns.
You still have two years from the end of your accounting period to make a claim.
Many companies miss out or face challenges because of:
The 2025 R&D tax relief regime offers valuable support for innovative SMEs, but the rules are more complex than ever. The removal of restrictions on grant-funded projects is a major win for small businesses, but the merged scheme and new compliance requirements mean claims must be carefully prepared.
As with any tax matter, the right advice at the right time can protect your business and maximise your benefit. If you are developing new products, processes, or technologies, it is worth reviewing whether your company qualifies.
Disclaimer: R&D tax credit rules are complex and subject to change. This article provides general guidance only. Always seek professional advice for your specific circumstances and ensure claims are prepared by qualified specialists.
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