When a firm retires all or a portion of its debt securities by making an offer to its debtholders to repurchase a predetermined number of bonds at a specified price and during a set period of time. Firms may use a debt tender offer as a mechanism for capital restructuring or refinancing. If interest rates have come down significantly, the firm may want to conduct a new bond offering at a lower rate and then use the proceeds to conduct a debt tender offering in order to buy back the more expensive bonds as a way of cutting costs.