How to Claim R&D Tax Relief
Guide to claiming Research and Development tax relief for your innovative UK company. Save up to 27% of qualifying costs.
What You'll Need
- Detailed project records
- Staff time allocation records
- Invoices for R&D materials/subcontractors
- Technical narrative for each project
- Financial calculations
Step-by-Step Guide
Understand if your work qualifies
R&D means seeking an advance in science or technology by resolving scientific or technological uncertainty.
- •Must be in science or technology field
- •Must involve genuine uncertainty
- •Routine work doesn't qualify
Identify qualifying projects
List all projects where you've tried to overcome technical challenges that weren't obvious to a competent professional.
- •Software development often qualifies
- •Process improvements can qualify
- •Even failed projects count
Calculate qualifying expenditure
Identify costs directly related to R&D: staff costs, materials, software, subcontractors, and utilities.
- •Staff costs are usually largest
- •Only qualifying activities count
- •Apportion if staff do other work
Determine which scheme applies
SME scheme if under 500 employees and <€100m turnover. RDEC if larger or receiving grants for the R&D.
- •SME scheme is more generous
- •Some subsidised R&D goes to RDEC
- •Check connected company rules
Prepare your R&D report
Write a technical narrative explaining each project: the advance sought, uncertainties faced, and how you resolved them.
- •Be specific about technical challenges
- •Explain what was uncertain
- •Describe your approach
Calculate the tax benefit
SME: Enhanced deduction of 86% of costs. If loss-making, can surrender for cash credit of up to 18.6%.
- •Profit-making: reduces Corporation Tax
- •Loss-making: can get cash back
- •Calculate using HMRC rates
Include claim in CT600
Submit your R&D claim as part of your Corporation Tax return. Include the R&D report and supporting calculations.
- •Must claim within 2 years of period end
- •Can amend previous returns
- •Include detailed breakdown
Respond to any HMRC enquiries
HMRC may ask questions about your claim. Be prepared to explain the technical aspects and provide evidence.
- •Keep all project documentation
- •Be prepared to explain technical work
- •Consider using R&D specialist
Common Mistakes to Avoid
Claiming for routine development work
Not keeping adequate records
Missing the 2-year deadline
Overstating the claim (leads to enquiry)
Frequently Asked Questions
What qualifies as R&D for tax relief purposes?
Your project must seek an advance in science or technology by resolving a scientific or technological uncertainty. This includes developing new products, processes, or services, or appreciably improving existing ones. The uncertainty must not be readily deducible by a competent professional.
How much can I claim through R&D tax relief?
Under the merged R&D scheme (from April 2024), companies can claim an enhanced deduction of 86% on qualifying R&D expenditure, reducing their Corporation Tax bill. Loss-making SMEs may be able to claim a tax credit of up to 14.5% of qualifying expenditure.
Can software development qualify for R&D tax relief?
Yes, software development can qualify if it involves resolving technological uncertainty. Building a standard website or app using existing tools does not qualify. However, developing novel algorithms, solving complex integration challenges, or creating new technical capabilities may qualify.
How far back can I claim R&D tax relief?
You can claim R&D tax relief for the current accounting period and amend returns for the previous two accounting periods. Claims must be made within the Corporation Tax return filing deadline, which is 12 months after the end of your accounting period, or within the amendment window.
Do I need a specialist to submit an R&D tax relief claim?
While not legally required, using an R&D tax specialist is recommended for your first claim. They help identify qualifying activities, calculate the claim correctly, and prepare the technical narrative that HMRC may request. Many specialists work on a success-fee basis.
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