Capital income includes money used to initially set up a business, share capital for companies, and further investments or loans to the business by owners or third parties. Revenue income is money received from normal business activities like sales, rent, and commissions. Capital expenditure involves purchasing, altering, or improving fixed assets that will be used for over one year, as well as improvements to existing fixed assets and legal costs for property purchases. Revenue expenditure consists of running expenses not directly related to sales, such as rent, utility bills, and vehicle operating costs.