About Our Inside IR35 MOD Contract Roles
What does a mod contractor do?
MOD contract work spans across the full range of professional and technical disciplines that support the UK's defence capability, including engineering, programme and project management, commercial and procurement, finance, digital and technology, intelligence analysis, logistics, and estate management. The MoD is one of the largest and most complex government departments, operating a capital programme that spans major platforms including the F-35 programme, Type 26 frigates, the nuclear deterrent, Ajax armoured vehicles, and a broad portfolio of digital and information technology programmes. Contractors are engaged both directly through MoD departments and agencies, and through the major defence primes and tier-one contractors including BAE Systems, Babcock, Leonardo, QinetiQ, and DSTL.
Working within the MoD as a contractor requires an understanding of the specific governance, acquisition, and delivery frameworks that govern defence programmes. Familiarity with the CADMID cycle for capability acquisition, DRACAS reporting, and the Defence Procurement Model is expected for programme management roles. Commercial contractors need knowledge of Defence Conditions and the specific procurement regulations that apply to defence contracts. The security environment in defence is more complex than most other sectors, with SC clearance expected as a standard requirement for most MoD contractor roles and DV clearance required for roles involving access to classified information. The combination of security clearance, sector knowledge, and relevant technical expertise creates a significant entry barrier that supports premium rates for contractors who can meet all three requirements.
What is the market like for mod contractors?
MoD contracting is a large, long-term, and relatively stable market underpinned by the UK's sustained defence investment programme. The government's commitment to meet and exceed the NATO 2% of GDP defence spending target, combined with the elevated threat environment in Europe following Russia's invasion of Ukraine, has increased MoD programme investment and contractor demand across engineering, technology, and programme management disciplines. The MoD's digital transformation programme, which includes significant investment in cloud infrastructure, cyber capability, and defence data platforms, is generating growing demand for technology contractors with appropriate security clearance. Rates for SC and DV-cleared contractors consistently command a premium above equivalent uncleared roles, reflecting the combination of clearance requirements and specialist defence sector knowledge.
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 mod roles are usually Inside IR35?
Inside IR35 MOD work follows the broader government pattern of cautious IR35 assessment, with most contracts flowing through framework agreements that default to inside IR35. Programme management, systems engineering, and technical support roles within major defence acquisition programmes at Abbey Wood and other DE&S locations account for the bulk of demand. Contractors should treat inside IR35 as the default for MOD work and factor the clearance premium into rate expectations.
How much do mod contractors usually earn when working Inside IR35?
Contract rates for mod roles typically range from £400 to £750 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 mod vacancies are there on Quality Contracts?
Over the past twelve months, we have tracked over 100 mod contract roles across the site. Around one third of the roles currently listed on the site fall Inside IR35. Data reviewed up to September 2026.