Drawing on nationally representative data for British employees, the article argues for a more comprehensive concept of job insecurity, including not only job tenure insecurity but also job status insecurity, relating to anxiety about changes to valued features of the job. It shows that job status insecurity is highly prevalent in the workforce and is associated with different individual, employment and labour market characteristics than those that affect insecurity about job loss. It is also related to different organizational contexts. However, the article also shows that the existence of effective mechanisms of employee participation can reduce both types of job insecurity.