Behavioural intention is the strength of a person's decision to perform a specific behaviour and it sits at the centre of almost every theoretical account of consumer action. Despite a large and growing body of research, the literature remains scattered across disciplines, and no single review has brought together the major frameworks that researchers use to study behavioural intention in consumer contexts, assessed them alongside each other, and documented their empirical applications across industries in a structured way. This review addresses that gap. Seven major behavioural theories are examined across three thematic groups: attitude and intention models comprising the Theory of Reasoned Action (TRA), the Theory of Planned Behaviour (TPB), and Temporal Self-Regulation Theory (TSRT), moral norm and values frameworks comprising the Norm Activation Model (NAM) and Value-Belief-Norm Theory (VBN), and motivation and self-regulation theories comprising Social Cognitive Theory (SCT) and Self-Determination Theory (SDT). A structured literature search was conducted across Web of Science, Scopus, Emerald, and Google Scholar, supplemented by backward and forward citation searching. The final corpus comprised 18 founding texts along with 58 peer-reviewed studies published between 2000 and 2025. For each theory, this review describes the core constructs, traces empirical applications across consumer domains, and assesses strengths and limitations. The review also identifies patterns of theoretical integration and outlines research gaps, particularly for emerging market consumers and digital consumption environments