
Right to work checks for overseas contractors
Which documents count, when a share code is needed, and the record keeping that makes a check a statutory excuse rather than a formality

Assignment rate, employment costs, gross pay and deductions — what each line on an umbrella payslip means and how they fit together.
The assignment rate is what the agency pays the umbrella company. It is not a salary, and it is not what reaches the worker — it is the amount from which every employment cost is met before pay is calculated.
Confusing the assignment rate with gross pay is the single most common reason an umbrella payslip looks wrong.
What remains after employment costs is the worker’s gross pay, and it is from that figure that income tax, employee National Insurance and the employee pension contribution are deducted.
Holiday pay appears here too — either accrued and held, or rolled up and paid with each payment, but it should always be visible as its own line.
Add the employment costs to the gross pay. The total should equal the assignment rate. If it does not, that is the question to ask, and a compliant provider will answer it line by line.

Daniel Okafor
leads contractor payroll operations at Promultis
Daniel Okafor runs the payroll operation that pays several thousand contractors every week, and he built most of it. He joined Promultis from a large umbrella provider, where he was responsible for RTI submissions and auto-enrolment across a book of forty agencies. Daniel works closely with recruitment partners on onboarding, same-day payments and the reporting hirers need for their own audits. He writes about the practical side of contractor engagement — the parts that decide whether a worker stays past their first assignment.

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.

Building a compliant, scalable contractor model across multiple jurisdictions while keeping payroll accurate and contractors paid on time.


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