The average total cost of implementing an Integrity Pact in an infrastructure project over one year is estimated to be up to US$100,000.[14] This figure depends on many variables including market conditions, the country in which it is implemented, the size of the project and whether Integrity Pacts are already regularly used in that context.[15]
The development and implementation of an Integrity Pact is often funded by the contracting authority or a project investor such as an international financial institution. In the case of the EU Integrity Pacts - Civil Control Mechanism for Safeguarding EU Funds project, the European Commission has budgeted over EUR 7.2 million across the four-year pilot.[16] In other cases, bidders must contribute to the costs of the Integrity Pact as part of the bidding requirements.
The use of Integrity Pacts is credited with achieving significant cost savings in certain projects where effective monitoring and evaluation systems have been used. For example, an Integrity Pact applied to procurement related to the Greater Karachi Water Supply Scheme in Pakistan in 2001 contributed to saving around a fifth of the total contract price.[17] Subsequent projects implemented by the same monitor, Transparency International Pakistan, also resulted in cost savings and Integrity Pacts are now mandatory in Pakistan for all public procurement projects above a certain threshold.
Other countries with particularly successful experiences of Integrity Pacts include Mexico, where the concept is known as Testigo Social (Social Witness) and implemented by Transparencia Mexicana.[18] This concept was first applied to the construction of the El Cajón and La Yesca dam projects in 2002 and 2006/7 and is now mandatory in procurement above a certain threshold.[19]
There is evidence that even when an Integrity Pact "fails" to guarantee a procurement process free of corruption, it nevertheless contributes to transparency and the highlighting of fraud and other irregularities. This is the case in the Berlin Brandenburg Airport construction project, where the monitor Transparency International Germany formally withdrew in 2015 stating that "corruption has not been taken seriously".[20] The monitor appointed to oversee an Integrity Pact for a tramline project in Riga, Delna, also publicly withdrew from the process in 2019 due to "suspicions of fraud, mismanagement and unacceptably high risks".[21]
In January 2014, the Government of India cancelled a US$630 million deal with AgustaWestland for purchasing 12 AW 101 helicopters citing "breach of the Pre-contract Integrity Pact and the agreement by AWIL (AgustaWestland International Ltd)".[22]