Ernie1 That’s quite a lot of information. Thank you.
Setting up a limited firm perhaps simplify the tax rules between the US and UK as it will be a B2B and is unlikely to require a resident certification. I am not sure the US has a withholding tax rule. Liability is another grey area, while taking Prof Indemnity Insurance is a good back up. I understand the opportunity is more of an agile PM role and I think it is a low-risk.
A lot depends if the intermediary has the UK presence and IR35 applies. If it does, the NI deductions could be double, assuming the intermediary charges the employer NI on the contractor. They shouldn’t as they should be charging the US firm. If they did charge the contractor, the whole proposition is worthless at peak rates (30% NI and 45% tax)
Thanks Nightrider_1uk I will check Matthews&Co.
James Cowper Reading used to take care of the company, which I had years ago, accounts. Perhaps, I will provide the connect.
A chat with the intermediary is the next logical step.