R&D Tax Credits for Small Businesses
Research and Development (R&D) tax credits are a government incentive encouraging UK businesses to invest in innovation. From April 2024, most businesses use the merged R&D expenditure credit (RDEC) scheme, while loss-making SMEs with very high R&D intensity can access enhanced relief under the ERIS (Enhanced R&D Intensive Support) scheme. Both can significantly reduce your tax bill or generate a cash payment.
Key points
- From April 2024, a merged R&D scheme replaced the previous SME and RDEC schemes for most businesses.
- The merged scheme provides a 20% above-the-line credit on qualifying R&D expenditure.
- R&D-intensive loss-making SMEs can claim Enhanced R&D Intensive Support (ERIS) at a higher rate.
- HMRC has significantly increased compliance checks — ensure claims are well-documented and accurate.
What Qualifies as R&D
For tax purposes, R&D must seek to achieve an advance in science or technology by resolving a scientific or technological uncertainty. This is a broader definition than many businesses realise — it is not limited to laboratory research or high-tech sectors. R&D can occur in manufacturing, construction, software development, food production, and many other industries.
Qualifying activities include developing new products, processes, or services, or appreciably improving existing ones where the outcome is not readily deducible by a competent professional in the field. Qualifying costs include staff costs (salaries, NIC, pension), consumables used in R&D, software used directly in R&D, and from April 2023, data licences and cloud computing costs. Subcontracted R&D costs are partially qualifying under the merged scheme.
The Merged R&D Scheme from April 2024
For accounting periods beginning on or after 1 April 2024, most companies use the merged R&D expenditure credit (RDEC) scheme. This provides a 20% above-the-line credit on qualifying R&D expenditure. The credit is taxable, so the net benefit for a profitable company paying 25% Corporation Tax is approximately 15% of qualifying spend. For loss-making companies in the merged scheme, the credit can be surrendered for a cash payment after tax.
The Enhanced R&D Intensive Support (ERIS) scheme applies to SMEs where qualifying R&D expenditure is at least 30% of total expenditure (40% for periods before 1 April 2024). ERIS provides a 45% enhanced deduction plus a 14.5% payable credit for loss-making companies, giving a net cash benefit of around 27% of qualifying R&D spend. This is particularly valuable for pre-revenue or early-stage companies with significant R&D costs.
Making an R&D Tax Credit Claim
R&D tax credit claims are made through your Company Tax Return (CT600) submitted to HMRC. Since August 2023, all first-time claimants and those with a gap in claiming must submit an Additional Information Form (AIF) before the CT600, providing details of projects, qualifying costs, and the advance in science or technology being sought.
HMRC has increased its scrutiny of R&D claims following a significant rise in fraudulent and inflated claims. Ensure your claim is based on contemporaneous project documentation, accurately calculated costs, and a genuine technical narrative. Using an R&D specialist accountant can help, but you remain responsible for the accuracy of your claim. HMRC can open compliance checks up to four years after a claim and can investigate further back if it suspects fraud. Keep detailed records of all R&D activity and expenditure.
Frequently asked questions
Can a sole trader claim R&D tax credits?
Can I claim for R&D done by contractors or subcontractors?
How long does HMRC take to process an R&D claim?
What to do next
- 1Read HMRC's R&D guidance
Official HMRC guidance on R&D tax relief for companies.
- 2Submit your Additional Information Form
Required for all new and lapsed R&D claimants before submitting a CT600.
- 3Find an R&D specialist accountant
ICAEW guidance on choosing a specialist to support your R&D claim.
Official bodies and resources
HM Revenue & Customs
GovernmentResponsible for collecting taxes, paying some forms of state support, and administering national insurance.
Companies House
GovernmentIncorporates and dissolves limited companies, registers company information, and makes it available to the public.
Citizens Advice
CharityProvides free, confidential, and independent advice on a wide range of issues including benefits, housing, debt, and employment.
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