Internal Rate of Return

Internal Rate of Return (IRR) is a financial metric used to evaluate the attractiveness of an investment or project. It is the specific discount rate at which the net present value (NPV) of a series of cash flows equals zero. In simpler terms, it's the anticipated compound annual rate of return that an investment will generate over its life.

Companies use IRR as a key part of their capital allocation process to compare and rank different investment opportunities, such as new capital expenditures (CAPEX). If a project's IRR is higher than the company's required rate of return (often its weighted average cost of capital, or WACC), the project is typically considered a worthwhile investment. This makes it a critical tool for strategic and financial planning.

While powerful, IRR has limitations. It assumes that interim cash flows are reinvested at the same IRR, which may not be realistic. For this reason, it is often used in conjunction with other metrics like NPV and the Payback Period to provide a more comprehensive view of an investment's potential.