The Italian version of the Young's Internet Addiction Test (IAT) was administered online to a sample of Italian chatters (n = 236) who were different in terms of gender, age, and occupation. Results revealed that young users are more at-risk subjects for Internet addiction than adults, perceiving a compromised social and individual quality of their life that led them to make a compensatory usage of the Internet. Similarly, employed users perceive their social and individual quality of life as more compromised by the Internet than students. Moreover, subjects who declared spending much time online obtained IAT scores higher than others in all the IAT subscales. Finally, nightly users are more at-risk subjects for developing an Internet addiction disorder, diminishing their individual quality of life and disabling their time control.