What are the theoretical justifications of the net present value?

The net present value (NPV) is theoretically justified by the time value of money, which posits that a dollar today is worth more than a dollar in the future due to its potential earning capacity. NPV allows for the assessment of an investment's profitability by calculating the present value of future cash flows, discounted at a rate that reflects the risk and opportunity cost of capital. Additionally, NPV aligns with shareholder wealth maximization, as positive NPV projects are expected to increase the overall value of a firm. Thus, it serves as a critical decision-making tool for evaluating investment opportunities.