Net Present Value

The sum of all future cash flows discounted back to today's value using an appropriate discount rate. NPV answers the fundamental investment question: is this project worth more than it costs, accounting for the time value of money? A positive NPV means the investment creates value; negative NPV means it destroys value. The discount rate reflects both the time value of money and the riskiness of the cash flows—higher risk requires a higher discount rate, making distant, uncertain cash flows worth less today.

When to use it

When evaluating any investment or project requiring upfront capital for future returns; when comparing projects with different cash flow timings; when deciding whether to pursue, delay, or abandon a project; when negotiating acquisition prices or investment terms.

How it can help

Use NPV as the default framework for any investment decision: new projects, acquisitions, capital expenditures, even hiring. The discipline is making assumptions explicit—what are the expected cash flows, over what period, and at what discount rate? Even rough NPV estimates reveal whether an investment is in the right ballpark. The key insight: a dollar today is worth more than a dollar tomorrow, so projects with front-loaded returns are more valuable than projects with back-loaded returns, all else equal.