This study explored the potential relationships between consumer's basic psychological needs, their extrinsic motivations for sustainable clothing, as well as their purchasing intention for sustainable clothing. Additional analyses extended the evaluation of these variables’ relationship with multiple purchase intention constructs. The results indicate that there are relationships of various strength between all of the variables. The study indicates that consumers can have purchase intentions toward sustainable clothing at all levels of extrinsic motivation. The respondents fell into two categories of either passive or active in their purchase intentions. The three basic psychological needs do not have significant relationships with all levels of extrinsic motivation. The results suggest that evaluating consumer's basic psychological needs and extrinsic motivations can share significant information regarding sustainable clothing purchase intention, a valuable resource to businesses, education, and future academic research.