Purpose The purpose of this study is to investigate the relationship between tax evasion and certain demographic factors such as location, engagement of tax agent, size and type of small- and medium-sized enterprises (SMEs) industry in Malaysia. Design/methodology/approach In this study, using proprietary tax audit data from the Inland Revenue Board of Malaysia (IRBM) on the 2011 tax returns of SMEs, the authors run a multiple regression analysis to examine the impact of location, agent, type of industry, size of enterprise and type of tax evasion on SMEs’ tax evasion in Malaysia. Findings The authors find that tax evasion among SMEs in Malaysia is the highest when the business is located in a suburban environment and has no tax agent. Tax evasion is also influenced by the size of the SME (micro or medium). Originality/value This study gives insight that the IRBM can use to aid its collection department in profiling SMEs that have a higher tendency to evade paying tax.