WACC Calculator - Weighted Average Cost of Capital

What Is WACC?

Weighted Average Cost of Capital (WACC) is the average rate a company expects to pay to finance its business. In simple terms, it tells us how much it costs a company to raise and use money from different sources.

A company usually gets its capital from two main sources: debt and equity. Debt represents money borrowed through sources such as loans or bonds, while equity represents money provided by shareholders or investors. Each source has its own cost.

The term “weighted average” means that the cost of each financing source is considered according to its share of the company’s total capital. For example, if a company uses both debt and equity, the cost of each is combined based on how much of the company’s financing comes from each source.

WACC is expressed as a percentage because it represents the overall cost of financing. A lower WACC generally means the company can access capital at a lower cost, while a higher WACC indicates that financing is more expensive.

The basic idea can be understood as:

Debt + Equity → Cost of Each Source → Proportion of Each Source → Overall Financing Cost

A WACC Calculator can help estimate this overall cost by using the company’s debt, equity, and the respective costs of each financing source.

WACC Formula and How It Works

The Weighted Average Cost of Capital (WACC) shows the average rate a company pays to finance its business using a combination of debt and equity. It gives each source of financing a weight based on how much it contributes to the company’s total capital.

WACC Formula

WACC = (E/V × Re) + (D/V × Rd × (1 − Tc))

Each part of the formula represents a different factor:

• E = Market value of equity — the total market value of the company’s shareholders’ ownership.
• D = Market value of debt — the total value of the company’s borrowed funds, such as loans and bonds.
• V = Total capital — the combined value of debt and equity.

V = E + D

• Re = Cost of equity — the return that investors expect for investing in the company’s shares.

To estimate the cost of equity, companies and investors often use the Capital Asset Pricing Model (CAPM). A CAPM Calculator can help calculate the expected return using the risk-free rate, expected market return, and stock beta. This estimate can then be used as an input when calculating WACC.

• Rd = Cost of debt — the interest rate or cost the company pays on its borrowed money.
• Tc = Corporate tax rate — the applicable tax rate on the company’s profits.

The formula gives separate weights to equity and debt and then combines their costs to calculate the company’s overall cost of capital.

Why Is Debt Adjusted for Tax?

The cost of debt is multiplied by (1 − Tc) because interest paid on business debt is generally tax-deductible. This means the actual cost of borrowing can be lower after considering the tax benefit.

For example, if a company’s cost of debt is 8% and its corporate tax rate is 25%, the after-tax cost of debt would be:

8% × (1 − 25%) = 6%

So, the company’s effective cost of debt is 6% after the tax adjustment.

A WACC Calculator applies these components and their respective weights to calculate the overall cost of capital, making it easier to estimate the rate a company needs to earn on its investments to create value for its investors.

How to Use our WACC Calculator

The WACC Calculator helps you estimate a company’s Weighted Average Cost of Capital using its cost of equity, cost of debt, tax rate, and capital structure. Enter the following details to calculate the WACC.

Step 1: Enter the Cost of Equity Inputs

Under Cost of Equity (CAPM), enter:

• Risk-Free Rate (Rf): Enter the risk-free rate, such as the 10-year Treasury yield.
• Market Return (Rm): Enter the expected annual return of the overall market.
• Beta (β): Enter the company’s beta, which measures how sensitive the stock is to overall market movements.

The calculator uses these values to estimate the company’s cost of equity using the Capital Asset Pricing Model (CAPM).

Step 2: Enter the Cost of Debt

Under Cost of Debt, enter:

• Interest Rate on Debt: Enter the company’s pre-tax cost of debt or average interest rate on its debt.
• Corporate Tax Rate: Enter the company’s effective corporate tax rate.

The tax rate is used to calculate the after-tax cost of debt, which accounts for the tax benefit associated with interest expenses.

Step 3: Enter the Capital Structure

Under Capital Structure, enter:

• Market Value of Equity: Enter the total market value of the company’s equity.
• Market Value of Debt: Enter the total market value of the company’s debt.

The calculator automatically uses these values to determine the company’s equity weight and debt weight in its overall capital structure.

Step 4: Show the Calculation Breakdown

If you want to see how the result is calculated, enable Show Calculation Breakdown. This option can display the key steps used to calculate the cost of equity, after-tax cost of debt, capital structure weights, and final WACC.

Step 5: Calculate the WACC

After entering the required values, click Calculate to get the final WACC.

The resulting Weighted Average Cost of Capital represents the company’s average cost of financing from both equity and debt, adjusted according to their respective weights in the capital structure.

Why Is WACC Important?

Weighted Average Cost of Capital (WACC) is important because it helps a business understand the average cost of the money it uses to finance its operations, investments, and projects. In simple terms, WACC represents the minimum return a company generally needs to earn on its investments to justify the cost of its financing.

WACC is widely used in investment analysis and business valuation. For example, when investors or analysts evaluate a company, WACC can help them assess whether the expected returns from the business are sufficient compared with the cost of the capital used to fund it.

Key Uses of WACC

• Investment Analysis: WACC can be used as a benchmark when evaluating whether an investment may generate an adequate return.
• Business Valuation: It is commonly used to estimate the present value of a company's future cash flows.

Once the present value of a company's projected operating cash flows has been estimated, the next step may be to determine the value of the business as a whole. An Enterprise Value Calculator can help estimate enterprise value using relevant financial inputs, depending on the valuation method. In a DCF valuation, enterprise value is generally derived from the present value of projected unlevered free cash flows.

• DCF Valuation: In a Discounted Cash Flow (DCF) analysis, WACC is often used as the discount rate to convert future cash flows into their present value.

If you want to estimate a company's value using its projected future cash flows, a DCF Calculator can help you calculate their present value using an appropriate discount rate. WACC is commonly used for this purpose when valuing operating cash flows available to all capital providers.

• Capital Budgeting: Companies can use WACC when deciding whether to invest in new equipment, expansion, technology, or other long-term projects.
• Project Evaluation: A project expected to generate returns above the company's cost of capital may be more financially attractive.
• Financing Decisions: WACC helps companies understand how their mix of debt and equity affects their overall financing cost.
• Comparing Returns with Financing Cost: It provides a useful benchmark for comparing an expected project return with the cost of raising capital.

For a broader assessment of how efficiently a company uses its capital to generate operating profits, you can also use a ROCE Calculator. Comparing Return on Capital Employed (ROCE) with WACC can provide an indication of whether the company's operating returns exceed its cost of capital, although the comparison should account for differences in tax treatment and calculation methods.

Frequently Asked Questions (FAQs)