Internal audit is a significant part of the whole audit process. Internal audit is conducted by the organs of the company which is the object of audit, and they organise and implement the internal audit by themselves. The main goal of internal audit in contemporary conditions is to examine and evaluate the whole functioning of the entire business system, and to give their opinion and suggetions to improve the business. Internal audit is focused on examining, the assessment of business operation and, development and increased performance of the business as a whole. Each large company should organise internal audit, and have their internal auditor. Internal auditors should identify the risks by making plans, procedures and organisation, and recommend the most appropriate control procedure to the management. Internal audit is carried out in the companies which subject to the special laws and regulations on internal audit. If the internal audit is not regulated by the specific regulation the company can provide internal audit voluntarily.