The purpose of this research is to analyze the relationship between intellectual capital and financial performance of eleven Islamic banks in Indonesia over the period 2013-2016, using the value-added intellectual capital model, utilizing panel data with seemingly unrelated regression analysis. The results of this research indicate that structural capital efficiency had a significant influence on return on assets, and asset growth. Thus, for Islamic banks in Indonesia, all non-human assets, including the standard operating procedures, storage of all data, structural procedures, governance and policies for decision-making had significant effects on return on assets, and asset growth. Islamic banks in Indonesia can achieve competitive advantages in terms of return on assets, and asset growth, because they have positive value added reflected in intellectual capital value consisting of human capital efficiency, structural capital efficiency and capital employee efficiency.