Share capital refers to the total capital collected from shareholders for a company's business operations. There are several types of share capital: 1) Authorized capital is the maximum amount of capital a company is allowed to raise as stated in its registration documents. 2) Issued capital is the portion of authorized capital that is offered to the public for subscription. 3) Subscribed capital is the portion of issued capital that is actually subscribed to by the public. 4) Called-up capital is the portion of subscribed capital that the company calls on shareholders to pay.