External auditors are independent of the organisation they are auditing. They report to the company’s shareholders. They provide their experienced opinion on the truthfulness of the company’s financial statements and perform work on a test basis to monitor systems in place.

(https://www.careersinaudit.com/article/internal-vs-external-auditors-what-s-the-difference-/)

An IT audit is different from a financial statement audit. While a financial audit's purpose is to evaluate whether an organization is adhering to standard accounting practices, the purposes of an IT audit are to evaluate the system's internal control design and effectiveness. This includes, but is not limited to, efficiency and security protocols, development processes, and IT governance or oversight.

Installing controls are necessary but not sufficient to provide adequate security. People responsible for security must consider if the controls are installed as intended, if they are effective if any breach in security has occurred and if so, what actions can be done to prevent future breaches. These inquiries must be answered by independent and unbiased observers.

Source: https://www.quora.com/What-is-IT-auditing

The objectives for an external auditor are usually defined by statute whilst management will set the objectives for internal audits. External auditors generally have free reign to examine and assess every aspect of the system whilst management can pinpoint and highlight certain areas they want internal auditors to focus on. There are various types of internal audit.

Link : https://www.accountingtools.com/articles/the-difference-between-internal-and-external-audits.html

https://www.careersinaudit.com/article/internal-vs-external-auditors-what-s-the-difference-/

An IT audit is the examination and evaluation of an organization's information technology infrastructure, policies and operations.

Information technology audits determine whether IT controls protect corporate assets, ensure data integrity and are aligned with the business's overall goals. IT auditors examine not only physical security controls, but also overall business and financial controls that involve information technology systems.


reference : https://searchcompliance.techtarget.com/definition/IT-audit-information-technology-audit

• Internal auditors are hired by the company, while external auditors are appointed by a shareholder vote.

• Internal auditors are responsible to management, while external auditors are responsible to the shareholders.

• Internal auditors can issue their findings in any type of report format, while external auditors must use specific formats for their audit opinions and management letters.

• Internal audit reports are used by management, while external audit reports are used by stakeholders, such as investors, creditors, and lenders.

• Internal auditors will examine issues related to company business practices and risks, while external auditors  examine the financial records and issue an opinion regarding the financial statements of the company
https://www.accountingtools.com/articles/the-difference-between-internal-and-external-audits.html

generally, external auditors are mostly hired to audit the books of the company to see if their financial reports are following the prevailing IFRS/GAAP as well as local legislation.they are independent of the company that hires them. i.e their duty is to the stakeholders of the company.

internal auditor generally are concerned with internal controls of the company. it can be safety, financial controls, operation controls etc.they usually report to top management (board of directors etc) and are not independent of the company that hires them.

although external auditors can perform the job of internal auditors through an audit engagement, the procedures adopted differs from the one auditing company to another but you may still find similarities when approaching an objective.

https://www.quora.com/Does-an-internal-auditor-and-external-auditor-do-the-same-procedures-just-with-different-goals

Information technology audits determine whether IT controls protect corporate assets, ensure data integrity and are aligned with the business's overall goals. IT auditors examine not only physical security controls, but also overall business and financial controls that involve information technology systems.

External auditors are independent of the organisation they are auditing. They report to the company’s shareholders. They provide their experienced opinion on the truthfulness of the company’s financial statements and perform work on a test basis to monitor systems in place.

https://www.careersinaudit.com/article/internal-vs-external-auditors-what-s-the-difference-/

Internal auditors work within an organisation and report to its audit committee and/or directors. They help to design the company’s organising systems and help develop specific risk management policies. They also ensure that all policies implemented for risk management are operating effectively. The work of the internal auditor tends to be continuous and based on the internal control systems of a business of any size.

External auditors are independent of the organisation they are auditing. They report to the company’s shareholders. They provide their experienced opinion on the truthfulness of the company’s financial statements and perform work on a test basis to monitor systems in place.

https://www.careersinaudit.com/article/internal-vs-external-auditors-what-s-the-difference-/

External Auditors (EA) have to work hand-in-hand with Internal Auditors (IA) and EA have to, to a certain extent, rely on the IA’s work but still remain skeptical to validate their work. 

It had become an issue that the ISA revised a new guideline to identify few steps that EA should work through when determining to what extent should they utilise the IA’s work.

AccountingTools › articles › the-difference-between