The UK Industrial Contractor Market in 2026: After IR35
Five years on from the 2021 IR35 reform, the UK industrial contractor market has reshaped - not collapsed. Here is what is actually happening with day rates, demand and risk.
The 2021 extension of off-payroll working rules to the private sector reshaped the UK engineering contractor market more durably than many predicted. HMRC and IPSE research has consistently shown a reduction in the contractor population and a structural shift toward umbrella employment and inside-IR35 working.
In industrial markets, however, demand for genuinely outside-IR35 specialist commissioning, controls and project-engineering work has held up - driven by project-based capex pipelines where the SDS (Status Determination Statement) defensibly supports outside status, particularly where multiple end-clients are engaged through an integrator or main contractor.
Day rates have re-stratified. Inside-IR35 senior controls engineers cluster at £450–£600. Outside-IR35 equivalents - where the working pattern, control and substitution rights genuinely support it - range £550–£750. Specialist commissioning engineers travelling mainland Europe attract £650–£850 outside IR35, plus expenses.
Compliance risk has not disappeared. End clients carry residual exposure if SDS processes are poorly documented, and HMRC compliance activity in the construction, energy and manufacturing sectors has continued through 2024–2025. The mitigations are well understood: rigorous SDS processes, CEST or specialist review, and avoidance of long-tenured contractor relationships that drift into employed-look-and-feel.
The strategic implication for employers is to be honest about which roles are genuinely project-based and which are not - and to design contractor engagement around real outside-IR35 working patterns rather than around tax convenience.