How Does Cognitive Dissonance Explain Why Consumers Justify Expensive Purchases After the Fact (Post-Purchase Rationalization), And What Does This Mean for Return-Policy Design?

This paper explores the cognitive dissonance theory developed by Leon Festinger (Festinger, 1957) as an answer to explain why consumers in their normal practices justify their high-cost purchases after they make them. This is often referred to as post-purchase rationalization and/or "buyer's remorse management". Based on the social-psychological literature on dissonance reduction, the consumer-behaviour research on post-purchase evaluation (Oliver, 1980; Sweeney, Hausknecht, & Soutar, 2000), and the current literature on retail returns (National Retail Federation & Happy Returns, 2024, 2025), the paper proposes a framework that integrates purchase involvement, decision irreversibility, and self-concept threat with the intensity of post-purchase dissonance and the rationalization strategies consumers use to manage it. The paper then moves on to the implications of this psychology for the firm, that is, the design of return policies. The ease at which a consumer can reverse a purchase decision has a direct effect on the psychological dynamics of dissonance, with lenient return policies making customers more likely to convert to a purchase and causing a window where dissonance can arise as an actual return. The paper utilizes data from the National Retail Federation, Janakiraman, Syrdal, and Freling (2016) meta-analysis of the U.S. retail return literature, and other secondary sources to illustrate that there were an estimated $890 billion worth of U.S. retail returns in 2024 (16.9% of sales), a slight decrease to estimated $849.9 billion worth of U.S. retail returns in 2025 (15.8%), and leniency dimensions (e.g. monetary, temporal, effort, scope and exchange) have an asymmetric influence on purchase and return behaviour. The paper ends with a section on policy design that proposes a framework for structuring the return windows, restocking fees, exchange vs refund default, and post-purchase communication that strikes a balance between the benefits of conversion and the costs of return, while also promoting real satisfaction for customers, not just the suppression of regret.