The introduction of Free Public Transport (FPT) is in many cities a potential path to control and reduce the environmental, social and economic prob-lems. FPT can take several forms from the more widely used partial FPT, which includes limitations in its application, to full FPT. This paper aims to investigate the socio-economic feasibility of introducing FPT in Athens. For this purpose, a socio-economic analysis was conducted to assess the economic advantages and disadvantages of the FPT, up to the year 2030. Four Scenarios were examined considering 0% (S0), 50% (S1), 75% (S2) and 100% (S3) fare discount, respec-tively, on PT tickets. Consequently, a multinomial logistic model was developed to investigate for each of the three discounts the level preferring Athenians the FPT over private car, using data from a stated preference questionnaire survey. For S1-S3 the investment and the operational costs along with the impact on travel time, fuel consumption, road safety and air pollution were estimated and monetized. The socio-economic analysis illustrated that the introduction of FPT in Athens can contribute to social welfare in the medium-term future, mainly due to the modal shift from private cars to PT. More precisely, the examined scheme shows a positive NPV and high IRR in all the Scenarios, indicating its feasibility over time. To be noted that even in extreme price changes of significant input variables, NPV remains positive, ensuring a positive impact on society.
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