What if the contractor is supplied by an agency?
As mentioned earlier, if an agency is involved you must send them a copy of the status determination statement for each contractor, and they will also have the right to dispute the outcome.
If the agency pays the contractor, they will be responsible for the operation of PAYE and NIC’s deductions and any apprenticeship levy. The agency may try to recover these costs from the end user client.
If workers are supplied by an agency or umbrella company and are already treated as employees by the agency, they will remain unaffected by IR35.