So, the boss trying really hard to get you to stay on?
This is a guess, as I'm not familiar with UK tax law, but I would assume the taxable income is based on the company's enterprise value or a fair multiple of your annual net income.
when you say equity do you mean shares or profit?
If it's profit - ie a bonus - taxed as per usual.
If you're getting shares then you will be subject to capital gains tax then taxed upon your dividend payments.
Taxed up the ass in the UK either way.![]()