This study used classification tree analysis to examine who is and who is not willing to use online employer-provided retirement investment advice. Using data from the Retirement Confidence Survey (Employee Benefit Research Institute, 2004), the study focused on who was more likely to use online retirement investment advice when it was available from their employer. Results indicated that those who were younger, those who participated in a defined contribution retirement plan, and those who made joint (with someone else in their household) personal finance decisions were more likely to use online professional retirement investment advice. (Contains 1 table and 1 figure.)