Understanding the Whole Method of How to Calculate Weighted Average Cost of Capital

This article will delve into the intricacies of the Weighted Average Cost of Capital (WACC)—a fundamental concept in corporate finance. Understanding the concept of how to calculate weighted average cost of capital or WACC and its importance for businesses, as it represents the average rate of return a company is expected to offer its investors to finance its assets, operations, and growth.

WACC is crucial because it’s a discount rate for evaluating investment projects and the overall cost of financing for a business. This article will guide you through the definition of WACC, its calculation, and the significance of each component used in the process, with an example based on Allied Food Products.

Table of Contents

• What is Weighted Average Cost of Capital (WACC)?
• Weighted Average Cost of Capital Formula
• Why Does the Tax Rate Affect Only the Cost of Debt?
• Example Calculation Using Allied Food Products
• Importance of Weighted Average Cost of Capital (WACC) in Financial Decision-Making
• Conclusion
• FAQ

What is Weighted Average Cost of Capital (WACC)?

Weighted Average Cost of Capital (WACC) is essentially the minimum return a company must earn on its existing asset base to satisfy its investors. If a company’s return on invested capital (ROIC) exceeds its WACC, it is generating value; if not, it’s losing value.

It represents the company’s blended cost of debt, preferred stock, and common equity, weighted by their target proportions in the company’s capital structure.

Weighted Average Cost of Capital Formula

The formula to calculate weighted average cost of capital combines the costs of each source of financing—debt, preferred stock, and common equity—adjusted for the target capital structure. Here is the WACC formula:

Where,

• wd: Weight of debt in the target capital structure
• rd: Cost of debt
• T: Corporate tax rate (interest on debt is tax-deductible)
• wp​: Weight of preferred stock in the target capital structure
• rp​: Cost of preferred stock
• wc​: Weight of common equity in the target capital structure
• rs​: Cost of common equity

This weighted average cost of capital formula considers each component of capital and its proportions, meaning that companies with a higher debt proportion (for example) will have a greater emphasis on the cost of debt in their WACC calculation.

Why Does the Tax Rate Affect Only the Cost of Debt?

In the WACC formula, only debt has a tax adjustment because interest on debt is tax-deductible, reducing the actual cost incurred by the company. Preferred stock dividends and returns on common stock, however, do not enjoy this tax deduction, so they are not adjusted by the tax rate.

Let’s understand how to calculate weighted average cost of capital with an example

Example Calculation Using Allied Food Products

Let’s use Allied Food Products to illustrate the WACC calculation. The target capital structure percentages are:

• Debt: 33%
• Preferred Stock: 2%
• Common Equity: 65%

Assume that Allied’s costs of capital are as follows:

• Cost of debt, rd: 5.5%
• Cost of preferred stock, rp​: 6.0%
• Cost of common equity, rs: 9.0%
• Corporate tax rate, T: 25%

Step-by-Step Calculation

1. Calculate the After-Tax Cost of Debt: Since debt interest is tax-deductible, we adjust the cost of debt by (1 – T):

2. Calculate the Weighted Costs:

• Weighted cost of debt: 0.33 x 4.125% = 1.36125%
• Weighted cost of preferred stock: 0.02 x 6.0% = 0.12%
• Weighted cost of common equity: 0.65 x 9.0% = 5.85%

3. Calculate the WACC by Summing the Weighted Costs:

Therefore, Allied Food’s WACC, based on its target capital structure and current cost estimates, is approximately 7.33%.

Importance of Weighted Average Cost of Capital (WACC) in Financial Decision-Making

The weighted average cost of capital or WACC serves as a benchmark for evaluating investment opportunities.

For example, if Allied Food considers a new project, the expected return on that project should exceed the WACC to ensure it adds value to the company. If the project’s return is below the WACC, it will not meet the minimum return expectations of the company’s investors.

Conclusion

The Weighted Average Cost of Capital (WACC) is a critical metric for any company, reflecting the blended cost of various sources of capital. By taking into account the target capital structure, WACC provides a benchmark return rate that the company needs to exceed to create value.

Allied Food’s WACC calculation serves as a practical example of how companies use WACC in their strategic financial planning, ensuring they allocate capital in ways that maximize shareholder value.

If you have any confusion regarding the topic of how to calculate weighted average cost of capital or WACC, let me know in the comment box.

FAQ