What Qualifies for R&D Tax Relief? FAQ Guide

by Adam Park | October 27, 2025

R&D Tax Relief helps UK businesses reduce costs by offering tax deductions or cash payments for qualifying research and development activities. To qualify, your project must address scientific or technical uncertainties and aim to advance knowledge or capabilities in these fields. Eligible activities include product development, process improvement, feasibility studies, and prototype creation. Costs such as staff salaries, software, consumables, and a portion of utilities can be claimed. However, routine maintenance, market research, and aesthetic changes don’t qualify.

Key points to keep in mind:

Document your R&D activities thoroughly, including successes, failures, and cost breakdowns.
Only expenses directly tied to R&D work are eligible.
From April 2024, a unified R&D scheme will replace the current RDEC and ERIS systems, with stricter compliance requirements.

Basic Requirements for R&D Tax Relief

To qualify for R&D Tax Relief, your project needs to focus on pushing the boundaries of science or technology. This is the fundamental criterion for any successful claim.

Scientific or Technological Advance

Your project must aim to achieve a genuine step forward in science or technology by expanding current knowledge or capabilities.

Science refers to the structured exploration of the physical and material world. Since 1 April 2023, mathematical advances also fall under this category. Technology, on the other hand, involves applying scientific principles in practical ways. Any progress in these areas must be acknowledged by a qualified professional as a meaningful improvement.

For instance, if you're working on a battery with higher energy density, the progress would have tangible physical implications. Similarly, developing new data compression algorithms contributes to the broader pool of knowledge.

Next, let’s explore how these advances connect to qualifying activities and allowable costs.

What R&D Activities Qualify

Knowing which activities qualify for R&D Tax Relief is essential for making legitimate claims and avoiding issues with HMRC. Below, we break down activities that typically qualify and those that don’t, helping you navigate the process with confidence.

Examples of Qualifying Activities

Product development qualifies when it involves solving technical uncertainties to create or significantly improve products. For instance, developing advanced software solutions to tackle complex technical problems - beyond routine coding - falls within this scope.

Process improvement activities qualify when they involve addressing technical challenges in manufacturing or other processes. This could include designing more efficient production methods or introducing innovative approaches to existing workflows that require resolving technical uncertainties.

Pure research qualifies when it explores new materials, scientific principles, or theoretical concepts with potential practical applications. This includes fundamental research aimed at expanding scientific understanding.

Technical feasibility studies qualify if they focus on determining whether a technical approach is viable. However, studies with purely commercial objectives do not qualify.

Prototype development qualifies when it involves creating experimental models or conducting trials to address uncertainties about achieving desired technical outcomes.

Activities That Do Not Qualify

Routine maintenance and upgrades are outside the scope of R&D. For example, updating software to a newer version, replacing worn equipment with identical models, or performing standard maintenance doesn’t meet the criteria, as these tasks don’t involve technical uncertainty.

Market research and commercial analysis are excluded. Activities like customer surveys, competitor analysis, or market testing focus on commercial rather than technical questions and therefore don’t qualify.

Aesthetic improvements without technical innovation don’t qualify. For instance, changing product colours, redesigning user interfaces for visual appeal, or making cosmetic modifications lack the required scientific or technological advancement.

Implementation of known solutions is a common area of confusion. Applying existing techniques or technologies without modification, even in a new context, generally doesn’t qualify as R&D.

Training and education activities are excluded unless they are directly integrated into a qualifying R&D project. General staff training, attending conferences, or taking educational courses - even on technical topics - don’t qualify.

Industry-Specific Considerations

The application of these rules can vary significantly across industries, so it’s worth examining how they translate to different sectors.

Technology and software companies often qualify through activities like algorithm development, artificial intelligence projects, or solving complex computational problems. However, routine tasks such as website development, standard database implementations, or basic mobile app creation generally don’t qualify unless they involve overcoming specific technical uncertainties.

Manufacturing and engineering firms frequently qualify by developing new production techniques, improving material properties, or designing innovative mechanical solutions. Activities involving automation, robotics, or advanced manufacturing processes often meet the criteria if they tackle technical uncertainties.

Life sciences and pharmaceuticals naturally involve high levels of R&D. Drug development, medical device innovation, and biotechnology research often qualify. However, routine clinical trials that follow established protocols may not meet the criteria.

Artificial intelligence and data science projects can qualify when they involve creating new algorithms, addressing complex data processing challenges, or developing innovative machine learning methods. On the other hand, using existing AI tools or performing standard data analysis without modification typically doesn’t qualify.

Across all industries, the key factor remains whether your activities aim to achieve scientific or technological advancements by solving uncertainties that professionals in your field cannot easily resolve using existing knowledge. By clearly separating qualifying activities from non-qualifying ones, you can structure your R&D claims effectively.

Which Costs Can Be Claimed

Now that we've covered qualifying activities, let’s dive into the costs you can claim. Knowing which expenses are eligible not only helps maximise your claim but also ensures compliance with HMRC’s rules, especially with recent legislative updates.

Main Cost Categories

Staff costs often make up the bulk of eligible expenses for most businesses. These include gross salaries, employer National Insurance contributions, and pension contributions for employees directly involved in qualifying R&D activities. It's important to note that only employees actively engaged in R&D work are eligible.

This category covers the full employment costs of researchers, scientists, engineers, and technicians working on qualifying projects. It also applies to project managers and other professionals whose work directly addresses the technical uncertainties central to your R&D activities.

Software and data costs are becoming increasingly relevant. Relief can be claimed on software licences, cloud services, and data purchases used directly in R&D. This includes specialist software used for design, simulation, or data analysis.

Consumable materials are another key area. These are materials that are transformed or used up during the R&D process, such as raw materials, chemicals, components, and other items consumed in experiments or prototype development. However, only materials directly used in R&D qualify.

Utilities and premises costs can also be claimed, but only on a proportional basis. For example, if 30% of your laboratory space is used for R&D, you can claim 30% of the associated heating, lighting, and rent costs. Keeping detailed records of how space and utilities are allocated between R&D and other activities is crucial.

Let’s now explore how subcontracted and overseas costs fit into these rules.

Subcontracted R&D and Overseas Costs

Recent changes have significantly impacted how subcontracted R&D costs are treated, affecting how businesses plan their research activities.

UK subcontracted R&D can be claimed at 65% of the actual cost paid to the subcontractor, provided the work qualifies as R&D and the subcontractor isn’t connected to your company.

Overseas subcontracted R&D now faces stricter limitations. Due to legislative changes, most overseas R&D subcontracting costs are no longer eligible for relief. This has led many businesses to rethink their global R&D strategies, with some shifting activities back to the UK to maintain eligibility.

Connected company rules add another layer of complexity. If you subcontract R&D work to a connected company, such as a subsidiary or sister company, different rules apply. Generally, payments to connected companies for R&D services aren’t eligible for relief, though there are specific exceptions in certain cases.

These changes have particularly affected multinational companies relying on overseas research centres. To adapt, many are expanding their UK-based R&D facilities to continue benefiting from tax relief while pursuing innovation.

Revenue vs Capital Expenditure

Understanding whether costs fall under revenue or capital expenditure is essential when preparing your claim.

Revenue expenditure includes costs like staff salaries, materials consumed in R&D, and software licences. These can be claimed directly through the R&D Tax Relief schemes.

Capital expenditure, on the other hand, covers items such as laboratory equipment, computers, and machinery. While these costs don’t qualify for R&D Tax Relief, they may be eligible for Research and Development Allowances, allowing 100% first-year capital allowances on qualifying equipment.

Software can sometimes blur the lines. Licences are usually considered revenue expenditure, while outright purchases of software may count as capital expenditure. The key factor is whether the expense provides a lasting benefit to your business beyond the immediate R&D project.

It’s worth noting that depreciation and amortisation of capital assets used in R&D are not eligible for relief under R&D Tax Relief schemes. This makes it critical to categorise expenses correctly from the start, as it can impact both your current tax position and long-term planning.

To strengthen your claim, maintain detailed records that clearly link each cost to qualifying R&D activities, and show how these expenses contribute to resolving technical challenges.

Documentation and Record Keeping

Keeping accurate records is a cornerstone of making a successful R&D Tax Relief claim. With HMRC tightening its scrutiny and updating filing requirements, having well-organised documentation is crucial to safeguard your claim and ensure compliance.

Required Documentation

You’ll need technical project descriptions that explain how your project tackled scientific or technological uncertainties. These descriptions must show that the progress achieved wasn’t something a skilled professional in the field could have easily accomplished.

It's also important to document both successes and failures during the R&D process. This includes noting what worked and, just as importantly, any dead ends or unsuccessful experiments.

Another key piece of documentation is staff involvement records. These should detail the roles of professionals working on the project and explain how they addressed specific scientific or technological challenges.

Additionally, cost breakdowns are essential. Every expense claimed must be directly tied to qualifying R&D activities. This means keeping detailed records to show how costs, such as those for shared resources like utilities, equipment, or staff time, were allocated between R&D and non-R&D activities.

To stay on top of this, it’s a good idea to update your records regularly throughout the project.

Maintaining Accurate Records

HMRC places a high value on contemporaneous documentation - records created while the R&D work is ongoing. These are seen as more reliable than retrospective accounts, so it's best to plan ahead and document as you go.

Make record-keeping part of your R&D workflow from the beginning. Teams should log technical decisions, experimental results, and problem-solving efforts in real time.

HMRC also expects to see evidence of a systematic approach. Your records should clearly outline the scientific or technological advance you’re pursuing, the steps taken to address uncertainties, and a detailed account of all qualifying expenses, including how shared costs were divided up.

While HMRC doesn’t specify a particular format for record-keeping, it does require enough detail to identify qualifying projects and associated costs. This helps ensure accuracy and makes it easier to respond to any enquiries.

Supporting estimated figures with clear evidence is another expectation from HMRC. This thorough documentation can also help uncover qualifying R&D activities and costs that might otherwise be overlooked.

Keeping meticulous records not only strengthens your claim but also helps you stay aligned with HMRC’s evolving requirements.

HMRC Claim Requirements

Since 8 August 2023, businesses are required to submit an Additional Information Form (AIF) alongside their R&D Tax Relief claims. The AIF requires detailed project descriptions and cost breakdowns, making robust record-keeping even more essential. Without proper documentation, meeting HMRC’s standards could become a challenge.

This added requirement underscores the importance of linking costs directly to qualifying R&D activities. Well-maintained records not only support your claim but also enable you to respond quickly and effectively to any HMRC enquiries.

UK R&D Tax Relief Schemes Overview

Following the earlier discussion on eligibility and costs, let’s dive into the specific schemes available to UK businesses. The UK’s R&D tax relief system now features distinct options tailored to businesses of varying sizes. Knowing how these schemes differ can help you make the most of the relief available while staying compliant with HMRC’s regulations. Below, we break down the key differences and how they fit into the overall framework.

RDEC vs Enhanced R&D Intensive Scheme (ERIS)

Currently, two primary schemes are in play: the Research and Development Expenditure Credit (RDEC) and the Enhanced R&D Intensive Scheme (ERIS). Here’s how they stack up:

RDEC: Open to companies of all sizes, offering a standardised relief rate.
ERIS: Specifically targeted at SMEs that meet certain R&D expenditure thresholds, with higher relief rates compared to RDEC.

Both schemes provide taxable credits that sit above the corporation tax line. However, for loss-making companies, the cash options differ between the two schemes, which could influence how businesses manage their claims.

Merged Scheme Details

From April 2024, the R&D tax relief system will transition to a unified scheme. Under this merged framework, all companies will claim R&D relief as expenditure credits within their corporation tax computations. For loss-making businesses, these credits can be surrendered for cash, though the cash rates will vary depending on the scheme.

The merged scheme also introduces stricter compliance rules. Companies will need to maintain thorough records and clearly demonstrate how their activities align with HMRC’s qualifying criteria. This added layer of scrutiny highlights the importance of robust documentation.

For large companies that don’t qualify as SMEs, RDEC remains the sole option for claiming relief. These distinctions are crucial for businesses when structuring their R&D claims effectively.

Key Points Summary

Claiming R&D tax relief requires a solid grasp of the qualifying criteria and careful attention to potential pitfalls. To be eligible, your project must achieve a real scientific or technological breakthrough - something beyond routine upgrades - and address genuine uncertainties. Routine tweaks or minor optimisations simply won’t meet the mark.

Keeping detailed records is critical. This includes project plans, clearly defined goals, evidence of the uncertainties encountered, test outcomes, and expert reviews. Without this level of documentation, HMRC could reject your claim.

It’s also important to exclude activities that don’t qualify. Advancements in the arts, humanities, or general business innovation are not eligible for R&D tax relief. Similarly, refining existing processes or making routine improvements doesn’t count as qualifying R&D work.

Make sure to clearly outline the specific scientific or technological challenges your project tackled and describe the systematic methods used to overcome them. HMRC wants to see proof of genuine uncertainty and a structured approach to solving it.

As highlighted earlier, starting your documentation early is essential. From the beginning of your project, record qualifying activities, define the uncertainties you’re addressing, and detail your systematic approach. This preparation not only strengthens your claim but also ensures you meet HMRC’s requirements. These principles are the foundation for successfully securing R&D tax relief.

FAQs

How will the new unified R&D scheme starting in April 2024 affect my current claims under the RDEC and SME schemes?

From 1 April 2024, the UK will roll out a unified R&D scheme for accounting periods beginning on or after this date. This new framework will merge the SME and RDEC schemes into a single system, with its foundation largely drawn from the current RDEC structure.

For companies turning a profit, the benefit under the unified scheme is estimated to be around 15% to 16% of qualifying R&D expenditure. If you’re already making claims under the SME or RDEC schemes, it’s a good idea to reassess your R&D activities and associated costs. This will help ensure they meet the updated criteria and allow you to make the most of the new rules.

What documents do I need to provide for HMRC when claiming R&D tax relief?

To meet HMRC's tightened guidelines for R&D tax relief claims, it's essential to provide well-organised and detailed documentation that clearly supports your claim. This means showcasing evidence of your qualifying R&D activities alongside the related expenses.

Here’s what you’ll need:

Financial records: Include invoices, payroll details, and any costs directly tied to your R&D projects.
Technical documentation: Provide project plans, reports, and proof of the technical challenges tackled during development.
Supporting business records: Meeting notes, emails, or other materials that demonstrate how the work qualifies as R&D.

Keeping these records comprehensive and accurate not only ensures compliance but also simplifies the claims process.

Can I claim R&D tax relief for subcontracted activities carried out overseas, and what recent changes should I be aware of?

From 1 April 2024, most research and development (R&D) costs tied to overseas subcontracted activities will no longer qualify for UK R&D tax relief. However, there are exceptions. If the work requires conditions or resources that are unique and cannot reasonably be reproduced in the UK, these expenses might still be eligible.

To assess whether your overseas R&D activities qualify, ask yourself: Are the specific conditions abroad absolutely necessary? Would replicating them in the UK be considered "wholly unreasonable"? It's crucial to carefully review your claims under these new rules to ensure they align with the updated requirements.