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About Our Inside IR35 Construction Contract Roles
What does a construction contractor do?
Construction contractors span a broad range of professional and technical disciplines across the built environment, including project management, quantity surveying, commercial management, engineering design, site management, BIM, and health and safety. Contract work in the construction sector arises on capital projects of all scales, from residential and commercial development through to major infrastructure, energy, and public sector programmes. Contractors are brought in to fill specialist roles on projects where permanent resource is not justified, to provide additional capacity during peak delivery phases, or to access skills and experience that are not available within the permanent team.
The construction contracting market is project-based by nature, and the disciplines in highest demand reflect the type and scale of the programmes being delivered. Quantity Surveyors and Commercial Managers are in consistent demand across the sector, as commercial and contractual management is a core requirement on virtually every construction project. Project and programme managers with major infrastructure experience are in strong demand given the volume of large-scale infrastructure delivery in the UK. BIM and digital construction specialists are increasingly sought as the industry adopts more sophisticated information management practices. Across all construction disciplines, professional chartership with bodies such as RICS, CIOB, or ICE is well regarded and frequently required for senior roles on major programmes.
What is the market like for construction contractors?
The UK construction contracting market is underpinned by a substantial and long-term pipeline of public and private sector investment across infrastructure, housing, energy, and commercial development. National Highways, Network Rail, the Environment Agency, and the major water companies are consistent sources of contract work, alongside the growing pipeline of offshore wind, nuclear, and energy storage projects. The public sector construction programme, including schools, hospitals, and defence infrastructure, also generates a steady demand for construction contractors. Rates vary considerably by discipline, seniority, and project type, with specialist roles on major infrastructure programmes consistently commanding the strongest rates in the sector.
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 construction roles are usually Inside IR35?
Inside IR35 construction contracts account for around 80% of those with a stated status, though this figure is skewed by public sector infrastructure programmes where framework agreements mandate inside IR35 treatment. Network Rail, Highways England, and local authority capital programmes are the largest sources. Private sector construction work remains predominantly outside IR35 in practice. Contractors moving between private and public sector construction projects should expect their IR35 status to change accordingly.
How much do construction contractors usually earn when working Inside IR35?
Contract rates for construction roles typically range from £400 to £700 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 construction vacancies are there on Quality Contracts?
Over the past twelve months, we have tracked over 770 construction contract roles across the site. Around one third of the roles currently listed on the site fall Inside IR35. Data reviewed up to July 2026.