It is not as clear cut as that. He may pay less tax, no NI on dividends for example, 20% on profits. However he will pay extra when he does self assesment as dividends are taken into account. Now, there are ways to push the boundaries if you are that way inclined but personally I like to sleep well at nights so I don't go close to those. Unless he is playing fast and loose he will inevitably pay tax. He may pay less than if he was simply paying himself a salary but he will pay tax. There is sometimes a bit of apendage waving going on in those conversations, I'd take it with a pinch of salt.I didn't really go into the details with him, he seemed pretty confident he wouldn't be paying any tax though.