The book investigates the core question of why administrative bureaucracies inevitably expand regardless of the actual work to be performed. C. Northcote Parkinson, a British naval historian and author, utilizes his observations of the British Civil Service to formulate his eponymous law. He argues that work expands to fill the time available for its completion, and that the number of officials grows in proportion to the amount of work they create for one another rather than the actual output required.

Experts recognize this work as a foundational text in organizational theory that uses satire to expose bureaucratic inefficiencies. Readers frequently note the dry, witty prose style that makes complex administrative observations accessible to a general audience.