Share capital is the amount of capital raised by a company by the sale of shares. It is made of paid-up capital, reserve capital, uncalled capital and share premium.
Paid-up capital is issued capital, fully or partly paid-up by subscribers. Uncalled capital is capital issued by for which the company has not requested payment. Reserve capital is the share capital that the company has decided to call up because the company is being wound up. Share premium is the excess paid over and above the shares' nominal value.