Here is a clearly differences and similarities “Internal Auditor” versus “External Auditor” sorted out:
The Different Objectives
The External Auditor:
The external auditor seeks to test the underlying transactions that form the basis of the financial statements.
The internal Auditor:
The internal auditor, on the other hand, seeks to advise management on whether its major operations have sound systems of risk management and internal controls.
The Main Differences
There are, however, many key differences between internal and external audit and these are matters of basic principle that should be fully recognized:
- The external auditor is an external contractor and not an employee of the organization as is the internal auditor. Note: however, that there is an increasing number of contracted-out internal audit functions where the internal audit service is provided by an external body.
- The external auditor seeks to provide an opinion on whether the accounts show a true and fair view, whereas internal audit forms an opinion on the adequacy and effectiveness of systems of risk management and internal control, many of which fall outside the main accounting systems.
The Main Similarities
The main similarities between internal and external audit are as follows:
- Both the external and internal auditor carry out testing routines and this may involve examining and analyzing many transactions.
- Both the internal auditor and the external auditor will be worried if procedures were very poor and/or there was a basic ignorance of the importance of adhering to them.
- Both tend to be deeply involved in information systems since this is a major element of managerial control as well as being fundamental to the financial reporting process.
- Both are based in a professional discipline and operate to professional standards.
- Both seek active co-operation between the two functions.
- Both are intimately tied up with the organization’s systems of internal control.
- Both are concerned with the occurrence and effect of errors and misstatement that affect the final accounts.
- Both produce formal audit reports on their activities.
To enrich your knowledge about the internal an external audit, read on……….
The 3 Key Models Of Organization Activities Involves Internal And External Audit

- It should be clear that the external audit role is really much removed from the considerations of the internal auditor both in terms of objectives and scope of work.
- External audit is a legal requirement for limited companies and most public bodies, while internal audit is not essential for private companies and is only legally required in parts of the public sector.
- Internal audit may be charged with investigating frauds and, although the external auditors will want to see them resolved, they are mainly concerned with those that materially affect the final accounts.
- Internal auditors cover all the organization’s operations whereas external auditors work primarily with those financial systems that have a bearing on the final accounts.
- Internal audit may be charged with developing value-for-money initiatives that provide savings and/or increased efficiencies within the organization. This applies to some external auditors in the public sector (e.g. Audit Commission and National Audit Office).
- The internal auditor reviews systems of internal control in contrast to the external auditor who considers whether the state of controls will allow a reduced amount of testing.
- Internal audit works for and on behalf of the organization whereas the external auditor is technically employed by and works for a third party, the shareholders.
- The internal audit cover is continuous throughout the year but the external audit tends to be a year-end process even though some testing may be carried out during the year.
Here is a list of “Internal Audit“ Versus “External Audit“ in detail:

For further reading about auditing, you may want to read the following entries as well:
Accounting-Financial-Tax.com Accounting resources provides case study, tutorial, tips and tricks that theoretically, technically and practically make sense.

tanks a lot your discrpiton is short and prsise so i want to say tanks.
pleas send me types of audit and their descripion.
thanks a bunch, first time audit studen and notes are of great help
IF A PERSON IS UNDERTAKING C FA CAN HE/SHE BE AN AUDITOR?
do you all have the exact facts that saying what is the mean of achieving internal control?
Thankx a lot , so helpful en aid understandin!!
thanx a lot. was very useful.
Best option for preparation
The External Auditor:
The external auditor seeks to test the underlying transactions that form the basis of the financial statements.
The internal Auditor:
The internal auditor, on the other hand, seeks to advise management on whether its major operations have sound systems of risk management and internal controls.
thanks,good notes
Thanks a lot.
it is very easy to understand,helpful for student who is doing audit subject
The External Auditor report to the president of the country/legislature Assembly/owers of the company Ltd/shareholder. etc
while the internal Auditor report to the management of the company for the work performance,properly post to the book of accouts.reconcil cash and bank monthly adhearing the proceduces etc
Your stuff is exceptionally good. There are short and precise. please send me notes on the types of Audit and their descriptions. Thank you.
Can someone pls explain to me how to prepare the flexible budget with this requirement bellow:-
1. Prepare a financial estimation for the proposed food stall. Your estimation shall
include, but not limited to the following:
a. Estimated revenues
b. Estimated costs for:
i. Initial setup
ii. Variable costs
iii. Fixed costs
iv. Overhead
2. Prepare a monthly flexible budget for the proposed stall based on the following
monthly sales revenues:
a. RM20,000
b. RM40,000
c. RM60,000
I REALLY ENJOYED THIS ARTICLE IT IS HIGHLY EDUCATIVE AND MEANINGFUL. KEEP EDUCATING AND DEVELOPING ACCOUNTING PROFESSION
I appreciate your commitment to the subject matter and I will to come up with my profession in case of any problem.
Thanks so much
Zerai
Plz i want to know about auditors liabilities,reports and opinion. Thanks.
Very useful, and very exact and descripitve! Thanks for a much needed description (a better one than Wikipedia has on auditing).