Corporate Finance Fundamentals for the CPA Exam: NPV, WACC, and Capital Budgeting

Why Corporate Finance Matters for Accountants

The Business Analysis and Reporting section includes corporate finance because accountants are expected to understand how capital investment decisions are made and how the cost of capital affects financial decision-making. Net present value, internal rate of return, and weighted average cost of capital are part of the professional vocabulary every CPA needs.

Net Present Value: The Gold Standard

NPV calculates the present value of expected future cash flows from a project, subtracts the initial investment, and tells you how much value the project creates in today's dollars. Accept projects with positive NPV; reject those with negative NPV. When choosing between mutually exclusive projects, choose the higher positive NPV.

Internal Rate of Return

IRR is the discount rate that makes NPV equal to zero. Accept when IRR exceeds the cost of capital. For mutually exclusive projects, IRR and NPV can conflict — always use NPV in those cases.

Weighted Average Cost of Capital

WACC = (Wd × Kd × (1-T)) + (We × Ke). The after-tax cost of debt is lower than pre-tax because interest is tax-deductible. Cost of equity uses CAPM: Ke = Rf + β(Rm − Rf). A higher beta means more risk and a higher required return.

Payback Period and Its Limitations

The payback period measures how quickly the initial investment is recovered. It ignores cash flows beyond the payback date and does not account for the time value of money — making it inferior to NPV despite its widespread practical use.