Purpose – The purpose of this paper is to assess costs in the National and University Library of Croatia for processing Croatian web resources and the maintenance and development of the service, and to analyse the present organisation and workflow of their processing, and to propose improvements.Design/methodology/approach – The assessment period was two months, during which the members of staff involved minutely monitored their tasks. The results were compared to the same exercise reported by the National Library of Australia and processing costs of cataloguing Croatian print publications.Findings – The bottom‐up analysis of processing web resources shows that a balanced description of tasks and their distribution over staff members was established, and that the present workflow meets the requirements of efficient processing of web resources. As a general finding, approximately the same time was spent on archiving new items, as on the control and maintenance of the already archived ones due to the change...