This research aims to determine the impact of age discrimination on business performance and market image of the UK retail industry, with a study on ASDA. It identifies types of discrimination, examines the impact of age discrimination on business performance and market image, and evaluates ways to overcome it. The research uses a positivism philosophy, deductive approach, survey strategy, quantitative choice, questionnaire as a primary research instrument, and probability sampling. The study proposes educating employees about discrimination, conducting team building activities, and developing a positive working environment as ways to overcome age discrimination.