There is no tax charge when share options are granted. However, for an “unapproved” share option, i.e. an option without the special tax benefits of EMI or other approved share plans, income tax and possibly National Insurance is charged when the option is exercised. And when the shares are sold, capital gains tax may be payable on any growth in value since option exercise.
EMI Schemes Example 1
David is granted an unapproved option to acquire a 3% shareholding in his employer company for its market value of £5,000. Four years later, he exercises the option at a time when the shares are worth £50,000, and two years after that he sells them for £150,000 when the company is taken over.
David pays no tax when the option is granted, but on exercise he is treated as having received taxable earnings of £45,000 (£50,000 share value less £5,000 option exercise price). He pays income tax at his marginal income tax rate, tax of up to £20,250, even though at this stage he has received no cash.
On sale of the shares, David pays capital gains tax on the £100,000 growth in value since he acquired the shares. Ignoring any reliefs he may have available, tax is charged at a rate of 20%, tax of £20,000.
So, although David has been very fortunate in being able to acquire shares for £5,000 and sell for £150,000, he has had to pay tax of up to £40,250, over half of which is payable well before he has received any money (and which might have been lost altogether had the shares collapsed in value).