Ordinarily the gain will be calculated (in GBP) based on the difference between the net proceeds and the ‘base cost’ for the shares sold, although you can also deduct certain costs of sale or acquisition (for example, broker fees, stamp duty reserve tax etc.).
Please see the government website here for further information.
The base cost of your shares is usually the amount you paid for the shares, although this will depend on how the shares were acquired.
If you have disposed of shares you acquired because of your job, i.e. through an Employee Share Scheme, please see the government website here for help on working out the base cost of your shares.
Should you need further advice, please contact your Deloitte representative.
There’s a different way of working out your base cost if you’ve sold the same type of shares in a company that you bought at different times.
You’ll usually need to work out the average cost of your shares to determine your base cost.
If you bought new shares of the same type in the same company within 30 days of selling your old ones, there are special rules for working out the cost to use in your tax calculations.
Please contact your Deloitte representative for further advice.