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Umbrella companies for engineers

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Why engineers increasingly work through an umbrella company, and what the incoming Joint and Several Liability rules change for the agencies that place them.

Why engineering leans on umbrella employment

Engineering contracts are short, specialised and often sequential — a contractor may work for four clients in a year through three agencies. An umbrella company gives them one employer, one payslip and continuous employment across all of it.

It also gives statutory rights that do not reset with every assignment: holiday pay, sick pay, pension enrolment and parental leave.

What changes from April 2026

  • Joint and Several Liability moves unpaid PAYE up the chain to the agency, or to the end client where no agency exists.
  • Choosing an umbrella provider stops being a worker’s decision alone; it becomes a risk decision for the agency placing them.
  • Due diligence on a provider needs to be repeatable and recorded, not done once at onboarding.

What good looks like

A compliant provider will show you its filings, explain every line of a payslip, and hold the insurances the assignment requires. It will not offer a take-home percentage that its competitors cannot match, because nobody compliant can.

If a provider’s pitch is the size of the net pay, that is the whole due diligence answer.

Talk it through

The change is a few months away and the work — mapping the chain, checking the providers in it — takes longer than that if it is left to the deadline.

Hannah Whitfield

Hannah Whitfield

heads compliance and IR35 advisory at Promultis

Hannah Whitfield has spent fifteen years on the compliance side of contract staffing, first inside a national recruiter and now leading the advisory team at Promultis. She writes and reviews the status determination processes that hiring firms rely on when HMRC asks how a decision was reached, and has guided clients through both the 2021 reform and the 2024 offsets. Her work covers umbrella and PEO engagements across construction, energy and technology. Hannah is a frequent speaker on supply chain liability and believes most compliance failures start as documentation failures.

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