This paper presents a comparative analysis of the resident's perception of tourisms impacts on two very successful major mature island destinations (Tenerife and Mallorca). To do so, we conducted a study based on the social exchange theory by using a scale that measures residents' perceptions of tourism's positive and negative impacts on the economy, culture, society and the environment. The results based on more than 1100 interviews show that similar opinions arise on both islands; however, significant differences in terms of the level of perception of the impacts in the two destinations have also been unveiled. Copyright © 2013 John Wiley & Sons, Ltd.