2 min read
What NPV measures
NPV converts all projected future cash flows from an investment into their equivalent value in today's money, using a discount rate that reflects the cost of capital or required return. The resulting single figure tells you whether the investment is expected to generate more value than it costs.
A positive NPV means the project is projected to return more than the minimum required rate; a negative NPV means it is not expected to cover its cost of capital. An NPV of exactly zero implies the investment earns precisely the required return — no more, no less.
How to apply it in practice
To calculate NPV, you map out the expected cash inflows and outflows year by year, then divide each by (1 + discount rate) raised to the power of the relevant year. The sum of all discounted flows, minus the initial outlay, is the NPV.
The choice of discount rate is critical. Directors often use the company's weighted average cost of capital (WACC) or a hurdle rate reflecting the riskiness of the specific project. A higher rate reduces NPV because future cash is worth less in today's terms.
- Small changes in the discount rate can swing NPV significantly on long-horizon projects.
- NPV is sensitive to forecast accuracy — garbage inputs produce misleading outputs.
- It works best when comparing mutually exclusive projects of similar scale and duration.
NPV and business lending decisions
Lenders and credit committees may ask for NPV analysis when evaluating a capital project you are financing. A robust NPV model, with clearly stated assumptions, demonstrates that you have stress-tested the investment rather than relied on optimistic projections.
Confirm specific investment appraisal methodology with your accountant or financial adviser, particularly when NPV outputs will be presented to external stakeholders.
Frequently asked questions
What is a good NPV?
Any positive NPV indicates value creation above the chosen discount rate. There is no universal threshold — what counts as acceptable depends on your required return, the project's risk profile, and opportunity cost of capital.
How does NPV differ from IRR?
NPV gives an absolute monetary figure; IRR (internal rate of return) gives the discount rate at which NPV equals zero. Both are useful, but NPV is generally preferred for ranking competing projects because IRR can give misleading results when cash flow patterns are irregular.
Funding for UK limited companies
Credicorp lends to your company, not to you personally — short-term working capital with no personal guarantee. See what your business could access.