About Our Inside IR35 Defence Contract Roles
What does a defence contractor do?
The defence sector is a significant employer of contractors in the UK, engaging professionals across engineering, technology, project management, commercial, intelligence analysis, and specialist technical disciplines to support the delivery of complex and long-running defence programmes. Contract roles arise most commonly within the Ministry of Defence, defence primes such as BAE Systems, Babcock, Leonardo, and QinetiQ, and the broader defence supply chain, where the volume and complexity of programmes require flexible specialist resource that cannot be maintained entirely within a permanent workforce. The security-sensitive nature of much defence work means that contractors operating in this sector must typically hold or be willing to obtain appropriate security clearances, most commonly SC or DV depending on the role.
The skills most valued in defence contracting reflect the sector's programme-intensive and technology-heavy character. Systems engineers with experience on complex defence platforms, project and programme managers familiar with CADMID or PRINCE2/MSP delivery methodologies, and commercial specialists with MoD procurement and DEFCONS experience are in consistent demand. Defence technology contractors, including software engineers, cybersecurity specialists, and data scientists, increasingly find opportunities as the MoD accelerates its digital and AI transformation agenda. The ability to navigate the specific governance, compliance, and security requirements of the defence environment is an essential differentiator for contractors entering the sector for the first time.
What is the market like for defence contractors?
Defence contracting in the UK is underpinned by a substantial and long-term investment programme in the armed forces, with major platforms including Type 26 frigates, Tempest, Ajax, and the nuclear deterrent creating multi-decade pipelines of engineering and programme management contract demand. The government's commitment to increased defence spending, combined with the operational pressure created by the changed security environment in Europe, is driving additional investment and contractor demand across both traditional defence engineering and newer areas including cyber, space, and autonomous systems. Security clearance is a significant entry barrier that constrains supply and supports rates for cleared contractors above those achievable in comparable uncleared roles.
What does Inside IR35 mean?
IR35 is UK tax legislation that determines whether a contractor is genuinely self-employed or working in a manner that resembles employment. When a contract is classified as inside IR35, income tax and National Insurance are deducted at source, typically via an umbrella company or agency PAYE. Headline day rates on inside IR35 engagements are generally higher than equivalent outside IR35 roles to account for the tax and employment cost structure.
Inside IR35 determinations are made where the working arrangements are considered to resemble employment, based on factors including the level of client control, the absence of a genuine right of substitution, and the presence of mutuality of obligation. Since April 2021, the end client is responsible for making this determination for medium and large private sector organisations. Many employers in financial services, government, and professional services assess the majority of their contractor engagements as inside IR35.
On QualityContracts.co.uk, approximately 49% of roles with a stated IR35 status are classified as inside IR35, making it the most common arrangement across the contract market. The proportion varies by sector and role type. Each listing on this page displays its IR35 status where provided by the hiring organisation.
What defence roles are usually Inside IR35?
Around 55% of defence contracts with a stated status are inside IR35, reflecting MOD's increasing use of framework agreements and managed service providers. Inside IR35 defence work is concentrated in programme management, systems engineering, and technical support roles within major acquisition programmes. DE&S Bristol and MOD Abbey Wood are significant hiring locations. Contractors working inside IR35 in defence should factor in the security clearance premium when evaluating net rates, as cleared contractors remain scarce relative to demand.
How much do defence contractors usually earn when working Inside IR35?
Contract rates for defence roles typically range from £450 to £850 per day, depending on the scope of the role, required expertise, and the delivery expectations of the engagement. Inside IR35 rates are typically 15% to 30% higher than equivalent outside IR35 roles to account for tax and national insurance deducted at source by the fee-payer.
How many Inside IR35 defence vacancies are there on Quality Contracts?
Over the past twelve months, we have tracked over 530 defence contract roles across the site. Around one third of the roles currently listed on the site fall Inside IR35. Data reviewed up to June 2026.