Who decides if my PA is employed or self-employed?

It is very important to understand that it is your responsibility to correctly decide the ‘status’ of your PA (that is, whether they are employed or, less commonly, self-employed) based on the specific working arrangements between you, so that you can operate PAYE if you need to.

This factsheet helps you understand the law becoming an employer. For more information from their website: Taking on your own PA