18. Share-based payments
The Group grants options over shares in The Royal Bank of Scotland Group plc to its employees under various share option schemes. The Group has applied IFRS 2 ‘Share-based Payment’ to grants under these schemes after 7 November 2002 that had not vested on 1 January 2005. The expense for these transactions is measured based on the fair value on the date the options are granted. The fair value is estimated using valuation techniques which take into account the option’s exercise price, its term, the risk-free interest rate and the expected volatility of the market price of The Royal Bank of Scotland Group plc’s shares. Vesting conditions are not taken into account when measuring fair value, but are reflected by adjusting the number of options included in the measurement of the transaction such that the amount recognised reflects the number that actually vest. The fair value is expensed on a straight-line basis over the vesting period.
