NPV (Net Present Value)

Measured as

NPV = sum cash_flow_t / (1 + r)^t - initial investment

Misused when

• Using an arbitrary discount rate (NPV is only as good as r).
• Comparing NPVs across projects with very different risk without adjusting the discount rate.

Operator takeaway

• Use NPV as the primary decision metric when you have a sensible discount rate (MARR).
• Compare projects on NPV for absolute value created; use PI for value per dollar under capital constraints.
• Tie NPV (Net Present Value) to the same balance-sheet date, scenario, and decision memo you are using elsewhere in the model.
• Document which claims, costs, or adjustments your team includes before comparing numbers across forecasts, covenants, or valuation work.

Next decision

• Quantify the impact with NPV Calculator if you need to turn the definition into an operating assumption.
• Read NPV (Net Present Value): definition, formula, and example if the decision depends on interpretation, policy, or trade-offs beyond the raw formula.