We analyze the relation between time preferences, study effort, and academic performance among first-year Business and Economics students. Time preferences are measured by stated preferences for an immediate payment over larger delayed payments. Data on study efforts are derived from an electronic learning environment, which records the amount of time students are logged in and the fraction of exercises completed. Our third measure of study effort is participation in an on-line summer course. We find that impatient students show weaker performance, but the consequences are relatively mild. Impatient students obtain lower grades and fail first sit exams more often, but they do not obtain significantly fewer study credits, nor are they more l...