Before proposition of a new initiative, public administrations and institutions assess the need for the action and the potential economic, social and environmental impacts of an alternative policy options in an impact assessment. Impact assessments are prepared, in particular, for initiatives that are expected to have significant economic, social or environmental impacts such as legislative proposals, non-legislative initiatives (e.g. white papers, action plans, financial programmes, and negotiating guidelines for international agreements) that define future policies, implementing or delegated acts. Under the service of Impact Assessments, the EU Advisory team provides cost-benefit analysis and ICT assessment of EU legislation at every stage of the EU policy cycle. 

Some examples of the EU Advisory team’s impact assessments are the following:
European Commission (DG HOME) – Cost-Benefit analysis on the transfer of PNR data to third countries assessed the ICT implications, and related costs and benefits, for airlines when transferring PNR (Passenger Name Record) data to third countries on flights from and to the European Union.
European Commission (Secretariat General) – Cost-Benefit analysis on the ECI online collection system analysed the online collection process, as currently in place (“AS-IS”) for the ECI; and produced a comparative analysis identifying the main advantages and disadvantages of existing online collection solutions used by citizens' initiative or e-petition instruments at European and national level and other existing market solutions.
European Commission (DG JUST) – ICT assessment of the legislative proposal on an ECRIS-TCN system regarding convicted third country nationals conducted an ICT assessment in order to evaluate the cost for implementing two possible technical scenarios for ECRIS-TCN that were identified as the most feasible by the European Commission.
European Commission (DG CLIMA) – ICT assessment of the Use of IT in EU ETS MRV analysed the use of existing electronic reporting language for EU ETS MRV by Competent Authorities, Industry Installation and Aviation Operators and Accredited Verifiers; and evaluated the costs and benefits associated with possible adoption of a common electronic reporting language.
Other impact assessments performed by the EU Advisory team include:
ESMA – Cost-Benefit Analysis on the establishment of a web portal serving as a European Electronic Access Point (EEAP)
ESMA – Study on the technical formats for Market in Financial Instruments Regulation (MiFIR) 
European Commission (DG DIGIT) – European Interoperability Strategy/ European Interoperability Framework Impact assessment – Illustration of activities within the scope of the study:
  • Ongoing open public consultation with closing date of 29 June 2016 - for (i) citizens (ii) On behalf of a business or private organisation (iii) On behalf of a research centre, academic institution, standardisation organisation, business supplying services to public administrations; and (iv) On behalf of a public administration.