Capital budgeting is how companies decide which big investments to make — new factories, acquisitions, product launches, or technology upgrades. These decisions involve large amounts of money, are difficult to reverse, and determine the company's future direction. Getting them right creates enormous value; getting them wrong can be fatal.
Key evaluation methods: NPV (Net Present Value) — the gold standard, accepts projects with positive NPV; IRR (Internal Rate of Return) — the implied annual return; Payback Period — how quickly you recover the investment; and Profitability Index — value created per dollar invested. Most companies use multiple methods for cross-validation.
Real-world example: Apple's decision to invest $10+ billion annually in R&D (capital budgeting) led to the iPhone, which generates $200+ billion in revenue. Amazon's $13.7 billion Whole Foods acquisition and $8.45 billion MGM purchase were capital budgeting decisions. Companies like Reliance spend Rs 1+ lakh crore annually on capital investments — each evaluated through rigorous capital budgeting analysis.