Deregulation may increase bank stability. Employing China’s loan-to-deposit ratio (LDR) reform in 2015, we show that the deregulation of the LDR increases the stability of banks. Specifically, the deregulation of the LDR alleviates banks’ deposit competition, and decreases reliance on customer deposit funding. By doing so, it improves the loan structure among banks with a high LDR, which, in turn, increases the on-balance-sheet stability of these banks. Meanwhile, the deregulation of the LDR curbs high-LDR banks’ impulse to issue principal-floating wealth management products, a form of shadow banking, which thus increases their off-balance-sheet stability.