This lesson examines the cost of capital—the required rate of return that an organisation must pay to its investors to compensate them for the risk of their investment.

3.1 The Weighted Average Cost of Capital (WACC)

WACC is a weighted average of the cost of debt and the cost of equity. It represents the overall required return for the firm’s investors and is used as the discount rate in DCF analysis . The DCU module requires students to “Explain the determination of the company cost of capital and its relationship with the capital structure of the firm” . Key components include:

• Cost of Debt: The interest rate paid on borrowings, adjusted for tax deductibility in some jurisdictions.

• Cost of Equity: The return required by shareholders, estimated using models such as the Capital Asset Pricing Model (CAPM).

3.2 Risk Premium and the Yield Curve

The risk premium is the additional return investors require for bearing risk. The yield curve—the term structure of interest rates—shows the relationship between interest rates and time to maturity . Understanding the yield curve is fundamental for determining the cost of funds across different time horizons.

3.3 The Cost of Capital in Decision-Making

The cost of capital serves as the hurdle rate for investment decisions. The House of Training course identifies the Weighted Average Cost of Capital (WACC) as a core topic, with an emphasis on understanding how the cost of capital is used to evaluate investment opportunities . The ACT’s DipTM syllabus requires candidates to “evaluate the impact of the organisation’s structure on accounting for treasury operations and transactions, analysing how treasury transactions should be reported and structured, and the impact of tax regulation” .

3.4 ESG and the Cost of Capital

Increasingly, Environmental, Social, and Governance (ESG) factors are influencing the cost of capital. The DCU module requires students to incorporate “an emphasis to Sustainability and ESG” in their appraisal of corporate finance decisions . Companies with poor ESG performance may face higher costs of capital as investors demand a premium for ESG-related risks.