
Umbrella payslips explained line by line
Assignment rate, employment costs, gross pay and deductions — what each line means and why the number on the payslip differs from the rate agreed with the agency

What a status determination statement has to contain, who issues it, and what happens when the worker disagrees with it.
A status determination statement is the end client’s written conclusion about whether an engagement falls inside or outside IR35, together with the reasons for it. A conclusion without reasons is not a valid statement.
It has to be passed to the worker and to the next party in the chain. Until it is, the client keeps the PAYE responsibility it was trying to pass on.
A worker or the fee-payer may challenge a determination. The client must respond within 45 days, either confirming the original conclusion with reasons or issuing a new statement.
Missing that deadline moves the PAYE liability back to the client, regardless of whether the original determination was right.
The cost of a determination is small; the cost of a category of determinations made carelessly is not. Assess engagements individually and keep the reasoning where you can find it again.

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.

Assignment rate, employment costs, gross pay and deductions — what each line means and why the number on the payslip differs from the rate agreed with the agency

Which documents count, when a share code is needed, and the record keeping that makes a check a statutory excuse rather than a formality

Scaling contractor hiring in 2026: advanced strategies for UK businesses and agencies. Learn how compliant engagement models and smarter workforce processes can reduce costs, improve retention, and support long-term global growth.


Stay up to date with the latest articles, news and translation insights
Thank you — new insights and updates will arrive in your inbox.