The UK’s defence and security sectors are home to some of the country’s most advanced engineering and technological innovation. Whether it’s developing next-generation surveillance systems, improving threat detection software, or engineering high-performance equipment for military, law enforcement, or critical infrastructure, many UK companies in this space are tackling highly complex technical challenges.
R&D tax relief is designed to support businesses making scientific or technological advancements by overcoming technical uncertainties. In defence and security, this often means creating technologies that perform reliably in extreme conditions, integrate with complex systems, or meet rigorous safety and security standards — all of which require extensive research, prototyping, and testing.
Whether you’re a defence contractor, specialist manufacturer, or technology provider, if your work involves solving technical problems that aren’t already solved by off-the-shelf solutions, you could be eligible for R&D tax relief.
Here are some examples of qualifying activities in the defence and security technology sectors:
Developing Advanced Surveillance or Detection Systems
Engineering new radar, sonar, or sensor technologies that improve detection range, accuracy, or reliability in difficult environments, such as low visibility, underwater, or electromagnetic interference zones.
Improving Communications and Signal Processing
Developing secure, high-speed, or low-latency communication systems that perform in battlefield, aerospace, or emergency response scenarios where conventional communications fail.
Enhancing Protective Equipment and Materials
Researching and testing new materials for body armour, vehicle protection, or blast-resistant structures that offer improved safety without increasing weight or compromising mobility.
Developing Secure Software and Cybersecurity Solutions
Creating advanced software to protect critical infrastructure, defence networks, or classified data from cyber threats, including encryption technologies, intrusion detection systems, or secure authentication methods.
Engineering Unmanned or Autonomous Systems
Designing and developing drones, robotic systems, or autonomous vehicles that operate in defence, border security, or hazardous environments, particularly where navigation, control, or reliability challenges must be overcome.
Integrating Complex Multi-System Platforms
Solving engineering challenges in integrating weapons systems, sensors, communication tools, and control interfaces on land, sea, or air platforms.
Meeting Stringent Safety and Compliance Standards
Developing products or systems to meet UK Ministry of Defence (MOD) or international defence standards, particularly when this requires extensive engineering, testing, and validation.
Reducing Environmental Impact of Defence Operations
Researching sustainable alternatives to traditional defence materials, fuels, or equipment, especially where new technologies must maintain or improve operational performance.
If your business operates in the UK defence or security sector and is engaged in activities like these, you may be eligible for R&D tax relief. This incentive helps companies recover a portion of their development costs, supporting the UK’s ongoing commitment to innovation, security, and technological leadership.