The main objective of this study is to test the explanatory power of the expanded cultural intelligence (CQ) scale and its 11 sub-dimensions in predicting expatriation intention (EI) in comparison to the four primary CQ dimensions. We exemplarily outline the theoretical advancement that is possible when focusing on the associations between the CQ sub-dimensions with EI. Based on samples of business students from Germany, the USA and China and using regression analysis and necessary condition analysis, our results indicate that the CQ dimensions are relevant determinants of EI, explaining variance over and above established determinants. Moreover, the results show that the CQ sub-dimensions explain more variance in EI than the four primary dimensions and offer potential to advance theorising in the field.