Objective: To assess the outcome of late registration for college classes and early class withdrawal. Method: Computerized 2007-9 school record data on 7,200 college students were analyzed to evaluate the effect of late class registration on the class grade--relative to the average class grade--and on class withdrawal. Assessed by multiple regression analyses in relation to these outcomes were gender, academic level and assignment to large or small lecture sections. Results: Late registration for class was found to be associated with lower grades relative to the average grade for the class (p less than 0.001). That effect was more pronounced for male students, upper classmen, and students in large lecture sections. Withdrawal from class was significantly more common for upper classmen, but it was not significantly related to late class registration. Conclusion: Late registration for college classes is associated with lower grades relative to the class average, but not to early class withdrawal. Key variables had a significant impact on these outcomes. (Contains 5 tables.)