Auditing theory seeks to provide a conceptual foundation for the practice of assurance, addressing the fundamental questions of why audits are demanded, what constitutes sufficient evidence, and how the auditor’s opinion provides value to stakeholders. The evolution of the subfield reflects a transition from a clerical focus on error detection to a sophisticated multidisciplinary inquiry into agency, cognition, and social legitimacy.
The earliest phase of the field is characterized by Traditional Auditing, which dominated from the industrial revolution through the mid-20th century. During this period, auditing was viewed primarily as a mechanical process of "vouching" and clerical verification. The central objective was the detection of fraud and the verification of mathematical accuracy. Theory was largely implicit and practice-driven, rooted in the belief that a comprehensive examination of all transactions could guarantee the integrity of the accounts.
By the 1950s and 1960s, the field shifted toward Normative Auditing Theory. This era was defined by a quest for a logical, deductive basis for auditing standards. Scholars and professional bodies sought to define what an audit "should" be, focusing on the conceptualization of the "true and fair view." Normative theory attempted to establish universal principles for evidence and materiality, moving the field away from simple checklists toward a professional judgment framework. This period established the theoretical necessity of auditor independence and the conceptual link between internal control systems and the scope of substantive testing.
The 1970s witnessed a paradigm shift with the ascent of Positive Auditing Theory, heavily influenced by the broader rise of Positive Accounting Theory and the economics of information. The central pillar of this movement was Agency Theory, which reframed the audit not as a search for absolute truth, but as a mechanism to reduce information asymmetry between principals (shareholders) and agents (managers). Under this framework, the audit is viewed as a monitoring cost incurred to mitigate agency conflicts. This period formalized the "demand for auditing" through economic models, analyzing how audit quality and brand reputation serve as signals in the capital markets.
Parallel to the economic turn, the 1980s saw the emergence of Behavioral Auditing Theory. This school challenged the assumption that auditors act as rational, unbiased processors of information. Drawing from cognitive psychology, this tradition focuses on Judgment and Decision Making (JDM). It investigates how heuristics, cognitive biases, and social pressures influence an auditor's assessment of risk and the evaluation of evidence. Behavioral theory shifted the unit of analysis from the firm or the contract to the individual auditor's mind, introducing empirical rigor to the study of audit failure and professional skepticism.
In the 1990s and early 2000s, Institutional Auditing Theory and Critical Auditing Theory gained prominence as critiques of the agency-based model. Institutional theorists argue that audits are often performed not to reduce information asymmetry, but to provide "legitimacy" to an organization within its social and regulatory environment. In this view, the audit report is a symbolic artifact that signals compliance with societal norms rather than a purely objective measurement of financial health. Critical Auditing Theory further expanded this by examining the power dynamics inherent in the auditing relationship, questioning the neutrality of the auditor and the social construction of "audit truth."
In the contemporary landscape, auditing theory is characterized by the coexistence of these diverse frameworks, often applied in tandem to address the complexities of modern corporate governance. The current state of the field is dominated by three primary active families: the Agency-based framework, which continues to drive research on audit fees, independence, and market efficiency; the Behavioral framework, which informs the design of audit software and the training of professional judgment; and the Institutional framework, which analyzes the global diffusion of auditing standards and the role of the "Big Four" in shaping global economic governance. Together, these traditions move the subfield beyond the binary of "correct versus incorrect" accounts toward a comprehensive understanding of assurance as an economic, psychological, and social phenomenon.