This study examines the relative importance of contract attributes in the context of Vehicle-to-Grid (V2G) contracts by means of a choice experiment. The experiment was conducted with 67 Dutch car drivers, including both EV drivers and non-EV drivers. They were asked to choose between two V2G contracts with different contract attributes and an option “no V2G contract”. The contract attributes had varying levels of remuneration, guaranteed minimum driving range, and required plug-in time during weekdays and weekends. The data collected was analyzed using a Multinomial Logit model (MNL) to estimate the utility function of the V2G contracts and to identify the most important attributes for the respondents. Besides, an estimation could be made on the preference of a V2G contract over no contract at all. The results showed that, surprisingly, the attribute remuneration had a relatively low importance coefficient and did not have a significant impact on the perceived utility of the respondents. On the other hand, it could be proved that consumers perceive different utility during weekdays and weekends, preferring more flexibility in the weekends. Guaranteed minimum driving range resulted to be the most important contract attribute. The results show that there is a relatively high willingness to participate in V2G contract both among EV-drivers as potential future EV-drivers. The results can be used for policymakers and aggregator companies to design more effectively V2G contracts and to promote the adoption of EVs in a more sustainable way enhancing the energy transition. According to this study the V2G system results to be profitable for the aggregator for various scenarios and really promising. Some application possibilities are suggested in this research, and from them could be concluded that there can be achieved satisfaction for all stakeholders involved.