Cascading employment is an increasingly prevalent yet understudied form of employment arrangement, where an employer places a worker in a client’s workplace through a sequence of labour intermediaries, with no direct contractual relationship between the worker’s employer and the end client. In this article, cascading employment is conceptualised as a distinct and normalised form of precarious work and differs from ‘triangular employment’ in several dimensions. The study reported herein draws on interviews with U.S.-based IT workers and stakeholders engaged in cascading employment. Findings reveal three key dimensions of cascading employment: multilayeredness, hierarchical fissuring, and relationship heterogeneity. These dimensions contribute to the aspects of precariousness of employment, including diluted income, heightened employment uncertainty, reduced worker control over working conditions, and limited legal protections. Moreover, the precariousness of cascading employment stems from the complexity of the employment arrangements, not merely from factors such as contract type, employment status, and industry, which are typical in explaining precariousness. Therefore, ‘complexity of employment arrangements’ should be recognised as a crucial criterion for employment precariousness. ‘Complexity’ can be measured by the number of actors involved, the extent of fissuring in employer costs and responsibilities, and the variety and intensity of inter-actor relationships.