Telecom audits are of several types, such as telecom bill audits and internal telecom audits. The purpose of these audits is to make sure that the information provided in the statement or the report is accurate and no false practices have been used. Telecom bill and invoice auditing deals with the checking of the information provided on the invoice or the bill from the telecom services provider to see if it is correct and factual. Internal telecom auditing can be of two types. First of all the auditing can be used to check the quotes of the expenditures on Materiality of different departments of a company. This measure would try to eradicate any wrongdoing on a personal level in the establishment. Secondly the internal telecom auditing could be used to recreate the expenditure on telecom of the company and the purpose for this would be to compare the audit with the bill or invoice presented by the telecommunications service provider.

Telecom invoice audits also check if the tariffs used by the telecom service providers are correct and abide by a previously signed agreement. Often telecom companies make changes to their general tariff and include those changes in the invoices of companies with which they have already got a previous agreement agreeing to a fixed rate. It is then the task of the auditors to notify the telecom services provider of these irregularities and request a new invoice.

Telecom audits are thus a fundamental part of Telecom Expense Management. In order to decrease the money spent on telecom bills, the information should be checked to ensure that it is correct and this prevents any funds from being wasted due to irregularities. Also, when the solutions of two different companies are being compared, telecom audits are extensively used. The telecom audits here help aggregate the costs of the solutions of both the companies so that comparisons can be made between them and when a company is trying to reduce its telecom costs it can look at this audit and choose the company with more benefits and a cheaper rate.

Another way telecom audits assist in Telecom Expense Management is to provide details of the telecom expenditures of either all the departments in a big corporation or the individual telecom expenses of an employee in a smaller company. This helps the Telecom Expense Management advisor see where the money is being wasted and he or she can then come up with measures to reduce the expenditure on telecom for the company as a whole. This helps the company use the money saved for a wide variety of uses such as development and expansion.