Net Present Value — The Dollar Dictionary

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Finance

Net Present Value

The value today of future cash flows, discounted to account for the time value of money — used to decide whether an investment is worth making.

NPV = (Sum of all future cash flows discounted to today) − Initial Investment. If NPV > 0, the investment creates value. If NPV < 0, it destroys value. If NPV = 0, you're exactly breaking even on a risk-adjusted basis.

The discount rate is the critical assumption. It represents both the time value of money (a pound today is worth more than a pound in five years) and the risk of the investment (riskier cash flows should be discounted more aggressively). Change the discount rate and the NPV changes dramatically — which is why analysts always test multiple scenarios. NPV is the most theoretically correct way to evaluate any investment decision.

NPV asks a simple question: is this deal worth it in today's money? Winning £1 million in 30 years sounds amazing — but if someone offered you £300,000 today instead, which would you take? NPV is the math that answers that question rigorously. It converts all future cash into present-day equivalents, then checks whether they exceed what you're spending right now.

Real world: When a movie studio greenlit a £100 million blockbuster, its finance team ran an NPV analysis. They forecast ticket sales, streaming rights, merchandise revenue, and international deals over 10 years — then discounted those future cash flows back to today. If the resulting NPV was positive, the project was worth funding. If negative, it would destroy value even if the film technically turned a profit on paper.

💡 NPV converts the fog of future possibilities into a single yes-or-no answer in today's money — it's the foundation of almost every major business decision.

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