This paper develops a real options model to understand two distinct roles played by intellectual capital in corporate financing decisions. Whereas limiting a firm's debt capacity because of its low liquidation value, intellectual capital enhances a firm's debt capacity through its positive impact on earnings. Our model shows that the former dominates or is dominated by the latter, depending on whether the rate of dissipation of intellectual capital upon default is larger or smaller than a critical level, respectively. Using patent-based and research-and-development-based variables as proxies for intellectual capital, we find robust evidence that the relation between intellectual capital and leverage is positive. Specifically, a one-standard...