Below are three acceptable answers to this question:

Debt provides a tax shield from the deduction of interest payments.
As a capital instrument that sits higher than equity in the creditor hierarchy, it is generally also a cheaper form of financing. This works to reduce a company’s cost of capital (WACC).
Raising debt does not dilute the ownership stake of current investors.

Debt and equity have a symbiotic relationship, as shown via a company’s optimal capital structure calculations. 因为它比股权便宜, a common question is: why not just fund the entire company with debt? The answer is that debt is good in moderation, 如果贷款太多，支付利息/本金和履行履约的压力就会太大. 股权也是公司的一个重要组成部分，因为它在心理上使股东与公司的长期增长保持一致.