This paper offers a longitudinal empirical investigation of why people sometimes do not act on their entrepreneurial intentions in spite of favorable perceptions of desirability and feasibility. Our research question is: what is the relative impact of motivation and volition in explaining the Unintentional Intention-action Gap (UIG)? This research focuses on the UIG through two perspectives. First, according to the motivational view, which is routinely employed in research on entrepreneurial intentions, the UIG should be a function of intention strength. Second, a complementary view proposes that while forming an intention is primarily motivational (i.e., what the person wants to achieve), the regulation of the translation of goals into action is mainly volitional (i.e., how the person exerts her will to attain what she desires).