This paper examines the impact of trade credit and bank loans on firms’ exchange rate passthrough. Using a comprehensive dataset combining customs transaction records and balance sheet data for Chinese exporters during 2000–2011, we document that firms that more intensively extend trade credit to their buyers exhibit more complete exchange rate pass-through. Further empirical investigation sheds light on the underlying mechanism. First, the use of trade credit is positively correlated with exporters’ dependence on bank loans. Second, firm-level bank loan interest rates decline following home currency depreciation. Motivated by these findings, we develop a theoretical model in which exporters constrained by working capital simultaneously extend trade credit to buyers and rely on bank borrowing. The model shows that home currency depreciation improves exporters’ profitability, lowers default risk, and reduces borrowing costs, ultimately enhancing exchange rate pass-through. By endogenizing the interest rate through firm-level default risk, the model reveals a novel channel through which firms’ financial activities shape the dynamics of exchange rate pass-through.