Net present value
Net Present Value (NPV) is a financial concept used to determine the actual monetary value of a firm or project by analyzing cash inflows and outflows over time. The fundamental principle of NPV is that money available today is worth more than the same amount in the future due to factors like inflation and potential investment returns. This concept encourages businesses to manage cash flows strategically—paying bills later while urging customers to pay sooner—to maximize current monetary value.
NPV is calculated using a formula that discounts future cash flows back to their present value, allowing for a comparison between the initial investment and expected returns. This analysis helps assess the viability of projects and investments, making it a crucial tool in finance and economics. However, NPV calculations are based on estimates that can vary with changing market conditions, and unexpected economic shocks can impact their reliability. Additionally, the effectiveness of NPV is sometimes questioned when applied to assets with fluctuating future values, such as renewable energy projects. Overall, NPV provides a structured approach to understanding the financial health of an organization through a detailed review of its cash flow dynamics.
On this Page
Subject Terms
Net present value
Net present value (NPV) is a technique for calculating the actual monetary value of a firm (or another type of organization or an individual) by first conceptualizing the value as the total value of all cash inflows and outflows and, second, calculating the value of those flows. This technique is used in finance or finance economics and so considers only the monetary aspect of any transaction to be relevant. There are therefore some contradictions with business practice when viewed from the perspective of marketing, human resources, and so forth.
![Probability-density distribution of net present values approximated by a normal curve. By AdamD (Own work) [Public domain], via Wikimedia Commons 90558403-119172.jpg](https://imageserver.ebscohost.com/img/embimages/ers/sp/embedded/90558403-119172.jpg?ephost1=dGJyMNHX8kSepq84xNvgOLCmsE2epq5Srqa4SK6WxWXS)
![Neoclassical American economist Irving Fisher formalized and popularized NPV. By Bain News Service [Public domain], via Wikimedia Commons 90558403-119171.jpg](https://imageserver.ebscohost.com/img/embimages/ers/sp/embedded/90558403-119171.jpg?ephost1=dGJyMNHX8kSepq84xNvgOLCmsE2epq5Srqa4SK6WxWXS)
Overview
The basic concept of net present value rests on the understanding that money today is better than money tomorrow. A company will try to pay its own bills late while encouraging customers to pay early so they can maximize the benefit of this fact. The reason is that money generally loses value over time because of the impact of inflation (and also the risk of bankruptcy or some other event that means a future expected flow of money does not actually arrive). Although inflation rates in the early twenty-first century are generally much lower than they were in, notably, the 1970s and are unlikely to reach those heights again in developed economies, inflation is still an important dynamic force in all economies. It means that a given amount of money held in the hand today is worth more than the same amount of money a year hence. Further, money held in the hand now could increase in value if invested with interest.
The NPV can therefore be used to calculate the viability of an individual project by estimating the future cash flow of a project compared to the initial investment; that is, spend x amount of money now and receive y in the future. It is an estimate because the exact rate of inflation in the future cannot definitely be known in the present in a developed economy in which the rates vary (at least partly) according to market forces. The financial health of a firm as a whole may be calculated as the summation of all such flows, whether incoming or outgoing. This may be calculated by using the formula PV = FV/(1 + r)n , in which the present value of an amount of money (PV), is determined by dividing the anticipated future value (FV) by 1 plus the inflation rate r, raised to the power of n, which represents the number of years in the future. If the inflation rate is a convenient number like 10 percent, with one year involved, then for a single investment decision, if PV > FV/1.10, then the offer should be refused; that is, if PV = $100, then if FV/1.10 = 10, FV must be $110 or more for the investment decision to be worthwhile.
As discussed, the NPV of a firm with complex transactions can be understood by assessing the aggregate of all individual flows and mapping these on a year-by-year basis. Clearly, this analysis will only be reliable while business conditions remain within the bounds of normalcy—unexpected shocks in the external economy (whether they should be expected or not) can test the limits of the model to destruction. NPV may also be less than completely effective in evaluating assets, such as renewable energy projects, that have constantly changing future values.
Bibliography
Atrill, Peter, and Eddie McLaney. Accounting and Finance for Non-Specialists. 8th ed. Upper Saddle River: Pearson, 2013. Print.
Barcelona, Ricardo G. “Renewable Energy with Volatile Prices: Why NPV Fails to Tell the Whole Story.” Journal of Applied Corporate Finance 27.1 (2015): 101–109. Business Source Complete. Web. 30 June 2015.
Beullens, P., and G.K. Janssens. “Adapting Inventory Models for Handling Various Payment Structures Using Net Present Value Equivalence Analysis.” International Journal of Production Economics 157.(2014): 190–200. Inspec. Web. 30 June 2015.
Brealey, Richard A., Stewart C. Myers, and Franklin Allen. Corporate Finance. Vol. 8. New York: McGraw-Hill/Irwin, 2006. Print.
Broverman, Samuel. Mathematics of Investment and Credit. Winsted: ACTEX, 2010. Print.
Moyer, Charles, William Kretlow, and James McGuigan. Contemporary Financial Management. 12th ed. Nashville: South-Western, 2011. Print.
Vanhoucke, Mario, Erik Demeulemeester, and Willy Herroelen, “On Maximizing the Net Present Value of a Project under Renewable Resource Constraints.” Management Science 47.8 (2001): 1113–21. Print.