What it is
An umbrella company is a UK employment intermediary that becomes the legal employer of a contractor for the length of an assignment, or across several assignments in a row. Instead of the contractor invoicing through their own limited company (a personal service company, or PSC), the umbrella runs PAYE: it deducts income tax and employee National Insurance, adds its own margin, typically a flat fee per timesheet rather than a percentage, and pays the contractor a net wage. Employer National Insurance, the Apprenticeship Levy and holiday pay all sit inside the assignment rate the agency or client actually pays, before any of that reaches the umbrella's payroll run.
Umbrella use is not new, but it became the default route for a large share of the UK contract market after the April 2021 Off-Payroll Working reform pushed medium and large private-sector clients to make the IR35 call themselves. Faced with that determination, many clients simply stopped engaging PSCs for roles they judged inside IR35 and pushed the work through an umbrella instead: an estimated 280,000 contractors moved off their own limited company and onto umbrella payroll around that reform. For a role judged inside IR35, an umbrella is now often the only route to market.
Since April 2026, the umbrella company a contractor is paid through is no longer just their choice. If it gets PAYE wrong, the liability can land on you.
Why it matters
For an agency, the umbrella isn't just paperwork sitting behind the placement, it's a compliance chain the agency is on the hook for. Since April 2020, agencies must give every work-seeker a Key Information Document before they agree terms, showing in writing who actually employs them, the assignment rate, and every deduction between that rate and their take-home pay. Non-compliant providers, tax avoidance structures dressed up as umbrellas, or 'mini umbrella' schemes that spread a single workforce across hundreds of shell companies to dodge National Insurance and VAT, have made FCSA accreditation the shortcut most agencies now use to vet a panel before ever putting a contractor through it.
That vetting stopped being optional on 6 April 2026. Joint and several liability rules let HMRC recover unpaid PAYE and National Insurance from the recruitment agency, or the end client if there's no agency in the chain, whenever the umbrella company a worker was placed with fails to account for it correctly. There's no reasonable-care defence to fall back on the way there is with an IR35 determination: the liability can land on the agency even where it did nothing wrong itself. Which umbrella a contractor sits on has moved from an HR footnote to a fact every terms of business and job order needs to carry.
How boilr handles it
boilr doesn't run payroll or choose an umbrella for a contractor, that decision sits with the worker and the agency's own preferred-supplier panel. What it does is stop the arrangement from getting lost between the first conversation and the placement. When a job order is contract or interim, boilr keeps the umbrella company, IR35 status and fee-payer terms attached to the mandate inside terms of business, so a consultant picking up the role weeks later is working from the same facts as the one who opened it.
That detail sits in the Company Brain rather than one consultant's inbox, so if a client's programme runs on a fixed umbrella panel, or a provider has raised a compliance flag before, that knowledge survives a desk change instead of resurfacing the hard way. Contract mandates stay visible in the BD pipeline alongside permanent roles, so a desk running both isn't tracking umbrella and IR35 detail in a separate spreadsheet.
