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# The Importance of WACC in Financial Modeling

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### Introduction

Weighted average cost of capital (WACC) is a key financial metric that represents the average cost of capital for a company. It is calculated by taking into account the cost of debt and equity, weighted by their respective proportions in the company's capital structure.

WACC is important for a number of reasons, including:

• Evaluating project profitability: WACC can be used to assess the profitability of a company's projects and investments. If a company's WACC is lower than the return on investment (ROI) of a project, then the project is expected to be profitable. However, if a company's WACC is higher than the ROI of a project, then the project is expected to be unprofitable.
• Valuing companies: WACC is one of the key inputs in discounted cash flow (DCF) analysis, a common method for valuing companies. DCF analysis discounts future cash flows to their present value using the company's WACC as the discount rate. This means that WACC has a significant impact on the valuation of a company.
• Comparing company performance: WACC can be used to compare the performance of different companies. If two companies have similar businesses and risk profiles, but one company has a lower WACC, then that company is expected to be more profitable and valuable.

### How to Calculate WACC

The WACC formula is as follows:

``````WACC = (Cost of debt * Debt weight) + (Cost of equity * Equity weight)
``````

The cost of debt is the interest rate that a company pays on its debt. The debt weight is the proportion of debt in the company's capital structure. The cost of equity is the return that equity investors expect to earn on their investment in the company. The equity weight is the proportion of equity in the company's capital structure.

### Example

Let's say that a company has a debt-to-equity ratio of 2:1. This means that 66.67% of the company's capital structure is debt and 33.33% of the company's capital structure is equity. The company's cost of debt is 7% and its cost of equity is 12%.

To calculate the company's WACC, we would use the following formula:

``````WACC = (7% * 66.67%) + (12% * 33.33%) = 9.33%
``````

Therefore, the company's WACC is 9.33%.

### Conclusion

WACC is an important financial metric that can be used to make informed financial decisions. It is used to evaluate project profitability, value companies, and compare the performance of different companies.

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