Onboarding is an important way for organizations to help new hires adjust to social and performance aspects of their jobs quickly and smoothly. Therefore, it is essential to measure the impact of onboarding practices such as pre-hire activities, orientation, and business-specific training, in order to justify the investment. Firms must utilize rigorous and consistent methods of measurement to identify the impact of changes to onboarding practices. We propose the following as the most successful measures of onboarding effectiveness. Our research reflects onboarding practices primarily from the U.S.