Where share options are awarded to employees, the fair value of the options at the date of grant is charged to profit or loss over the vesting period. Non-market vesting conditions are taken into account by adjusting the number of equity instruments expected to vest at each balance sheet date so that, ultimately, the cumulative amount recognised over the vesting period is based on the number of options that eventually vest. Market vesting conditions are factored into the fair value of the options granted. The cumulative expense is not adjusted for failure to achieve a market vesting condition.
The fair value of the award also takes into account non-vesting conditions. These are either factors beyond the control of either party or factors which are within the control of one or other of the parties (such as the company keeping the scheme open or the employee maintaining any contributions required by the scheme). Where the terms and conditions of options are modified before they vest, the increase in the fair value of the options, measured immediately before and after the modification, is also charged to profit or loss over the remaining vesting period. Where equity instruments are granted to persons other than employees, the profit and loss account is charged with the fair value of goods and services received.
Initial Measurement: The fair value of equity-settled share-based payments is measured at the grant date. This fair value is determined using the Black-Scholes model, which takes into account the terms and conditions upon which the instruments were granted.
Subsequent Measurement: The cost of equity-settled transactions is recognised over the vesting period, based on the number of awards expected to vest. The vesting period is the period during which all the specified vesting conditions must be satisfied.
Adjustments for Non-Market Vesting Conditions: At each reporting date, the entity revises its estimates of the number of equity instruments expected to vest. It recognises the impact of the revision to original estimates, if any, in the income statement, with a corresponding adjustment to equity.