债务资金成本的计算,通常采用现金流量折现法。由于债务的利息费用可以在税前抵扣,所以在计算债务资金成本时,需考虑利息抵税的影响,计算出债务的税后资金成本。同时,在不同的债务偿还方式下,债务本金的支付时间与支付金额不同,债务利息的支付时间与确认时间(抵税时间)也不同,? The calculation of the cost of debt funds, usually using the discounted cash flow method. As the debt interest expense can be deducted before tax, so in calculating the cost of debt funds, the need to consider the impact of interest tax credit to calculate the debt after-tax capital costs. At the same time, under different debt repayment methods, the payment time and payment amount of debt principal are different, and the payment time and confirmation time of debt interest (tax credit time) are also different.