his paper reviews the results of two U.K. surveys of activity-based costing (ABC) in the U.K.’s largest companies. These provide an opportunity to assess the changes that have occurred in the ABC adoption status of companies over a recent 5-year period. For the ABC users, some comparative information is provided on the nature of the ABC systems in use, their designers, the uses to which they have been put and the levels of success and importance that participants attribute to them. For the non-users, the reasons for their lack of commitment to ABC are explored.