This paper develops an understanding of the barriers to retailer foreign market expansion focusing on SME retail firms. A qualitative methodology was adopted to obtain a holistic understanding of the key barriers to international expansion experienced by retailers from both the firm and industry-level perspectives. In light of the findings from the case companies and industry organizations in this study, the paper concludes that the main barriers to foreign market expansion experienced by SME UK retailers, both at the entry and growth stages, comprise internal and external factors. This paper not only provides an understanding of the barriers encountered by SME retailers but also considers how such problems may be overcome