Prior to the introduction of the legislation, an individual could avoid being taxed as an employee on payments for services and paying Class 1 NIC by providing those services through an intermediary. The worker could take the money out of the intermediary, normally a Personal Service Company, in the form of dividends instead of salary. As dividends are not liable to NICs, the use of a dividend remuneration strategy results in the worker paying less in NICs than either a conventional employee or a self-employed person. And PAYE would not apply to the dividends.

The legislation ensures that, if the relationship between the worker and the client would have been one of employment had it not been for an intermediary the worker pays broadly tax and NICs on a basis which is fair in relation to what an employee of the client would pay.