Literature suggests dozens of ways of how to quantify the success of social media. However, there is no consent about the measurement of the return of investment (ROI). Only very limited empirical work is looking at the topic especially in tourism. This study is one of the first attempts to look at the ROI of tourism organizations. In doing so, various input (i.e. budget, manpower, amount of platforms used) and outcome (i.e. posts, website success and social media KPIs such as number of posts, interaction, and page performance index) variables are analysed. Responses of 150 tourism organizations to an online questionnaire and social media data collected via the monitoring tool Fanpage Karma provide insights for Facebook, Twitter, Google+, YouTube, Instagram, and Pinterest. Our data indicates that despite an ever increasing importance of online services for the customer journey, the monetary and manpower resources allocated to online marketing and social media is modest for most tourism organizations of the three surveyed countries. The achieved outcomes of the tourism organizations are weak especially when it comes to engagement figures. Revealed relationships such as between marketing budget and success measures for YouTube videos are presented and a discussion is provided.