Research and Development (R&D) Tax Relief is one of the most valuable tax incentives available to UK companies — yet it’s also one of the most misunderstood.
If your business invests in developing new products, improving processes, or solving technical challenges, you could be entitled to a significant corporation tax reduction or cash repayment from HMRC.
With major changes introduced following the Autumn Statement 2023, understanding the rules — and getting your claim right — has never been more important.
This guide explains what R&D tax relief is, who qualifies, how much you can claim, and how to claim compliantly.
What Is R&D Tax Relief?
R&D Tax Relief is a UK government incentive designed to encourage companies to invest in innovation.
If your company carries out qualifying R&D activities, you may be able to:
- Reduce your Corporation Tax bill
- Carry losses forward to offset future profits
- Receive a Corporation Tax refund
- Claim a cash payment if your company is loss-making
R&D tax relief is particularly valuable for start-ups, scale-ups, and tech-driven businesses that reinvest heavily into innovation.
Who Can Claim R&D Tax Relief?
To be eligible for R&D tax relief, your business must:
- Be a UK limited company
- Be subject to Corporation Tax
- Have carried out qualifying R&D activities
- Have incurred eligible R&D expenditure
What Counts as Qualifying R&D?
R&D for tax purposes is broader than many businesses expect. You may qualify if your company is attempting to:
- Create or improve products, services, or processes
- Resolve scientific or technological uncertainty
- Develop software, systems, or technical infrastructure
- Improve performance, scalability, or efficiency in a technical way
Importantly, your project does not need to succeed to qualify.
What Costs Can Be Claimed?
Eligible R&D costs can include:
Staff Costs
- Salaries
- Employer NIC
- Pension contributions
(for employees directly involved in R&D)
Subcontractors & Freelancers
- Costs related to R&D activity (subject to new rules)
Software
- Software used directly in R&D projects
Consumables
- Materials, utilities, power, water, and fuel used in R&D
Correctly identifying and allocating costs is critical — this is an area where HMRC scrutiny has increased.
How Much R&D Tax Relief Can You Claim?
The amount you can claim depends on:
- Whether your company is profit-making or loss-making
- Whether you qualify as R&D-intensive
- The accounting period start date
From 1 April 2024 – New Merged R&D Scheme
For accounting periods starting on or after 1 April 2024, HMRC introduced a merged R&D scheme, replacing the previous SME and RDEC complexity for most companies.
Key points:
- Above-the-line credit rate: 20%
- Net benefit:
- ~15% for profit-making companies
- ~16.2% for loss-making companies
Enhanced Relief for R&D-Intensive SMEs
Businesses classed as R&D-intensive may qualify for additional support.
From April 2024:
- The R&D intensity threshold has been reduced from 40% to 30%
- The SME credit rate is set at 14.5%
This change is designed to better support innovation-led start-ups and scale-ups.
Key R&D Tax Changes You Need to Know (Autumn Statement 2023)
HMRC has made several important changes aimed at simplification and fraud prevention:
Merged R&D Scheme
One primary scheme with aligned qualifying rules.
Contracted-Out R&D
Only the company that controls and bears the risk of R&D can claim.
Subsidised Expenditure
Restrictions under the old SME scheme have been removed.
Increased HMRC Scrutiny
- More enquiries
- Greater evidence requirements
- Penalties for non-compliant claims
HMRC estimates over £1 billion was lost to incorrect or fraudulent claims — enforcement has increased significantly.
How Do You Claim R&D Tax Relief?
The R&D claim process typically involves:
- Identifying qualifying R&D projects
- Calculating eligible expenditure
- Preparing technical and financial justifications
- Submitting the claim within your Corporation Tax Return (CT600)
Poorly prepared claims are now one of the top triggers for HMRC enquiries.
Professional advice is strongly recommended.
Why Professional Support Matters
With multiple rule changes in recent years, R&D tax relief is no longer a “tick-box” exercise.
HMRC expects businesses to:
- Understand the technical definition of R&D
- Hold detailed project documentation
- Justify costs clearly and accurately
That’s why we work alongside specialist R&D advisors to ensure claims are:
Fully compliant Technically robust Defensible in the event of an HMRC enquiry
As one R&D specialist notes:
“HMRC has changed the R&D tax scheme three times in the past 24 months. Today, compliance is critical — choosing the right advisor is essential.”
How We Help UK Businesses Claim R&D Tax Relief
Our UK-based accounting practice supports businesses by:
- Assessing eligibility
- Calculating accurate R&D claims
- Preparing compliant documentation
- Submitting claims to HMRC
- Supporting you through any HMRC enquiries
Speak to our tax specialists to find out how much R&D tax relief your business could claim.
FAQs: R&D Tax Relief UK
What industries can claim R&D tax relief?
R&D claims are common in software, tech, engineering, manufacturing, fintech, healthcare, and green energy — but many other sectors qualify.
Can start-ups claim R&D tax relief?
Yes. Loss-making start-ups can often claim cash repayments, making R&D tax relief especially valuable.
How far back can I claim?
You can usually claim R&D tax relief for the last two completed accounting periods.
What happens if HMRC investigates my claim?
HMRC enquiries are increasingly common. Proper documentation and professional preparation significantly reduce risk.
Summary
R&D Tax Relief remains one of the most powerful incentives available to UK businesses — but recent rule changes mean accuracy and compliance are essential.
If your business invests in innovation, claiming R&D tax relief could free up valuable cash to support growth — but only if it’s done correctly.
