By the end of this lesson you know what the cost of equity is, why it isn't the same as equity itself, and how it's estimated with CAPM.
\nThe second component of cost of capital is cost of equity: the minimum return a company's shareholders demand for taking on the risk of investing in it. It's easy to confuse it with equity, already covered in Level 2 -- both names mention "equity" -- but they're magnitudes of a completely different nature. Equity is a book value: a balance sheet figure, what's left of assets after subtracting liabilities. Cost of equity is a required rate of return: a percentage, not a monetary figure. They aren't the same magnitude under a different name.
\nThe most widely used model for estimating cost of equity is CAPM (Capital Asset Pricing Model). CAPM isn't a magnitude in itself -- it's the method used to estimate this rate, just as the accrual basis is the method used to build the income statement. It starts from three elements. The first is the risk-free rate: the return on a virtually risk-free investment, like a solvent country's long-term government debt. The second is the market risk premium: the extra return investors demand for investing in equities instead of that risk-free asset, precisely to compensate for the risk -- the uncertainty about the future outcome, already covered in Level 1 -- they take on by doing so. The third is the stock's beta: a measure of how much that specific stock's returns move relative to the market as a whole -- a beta above one indicates the stock amplifies market movements, and a company with a beta like that rightly demands a higher risk premium.
\nCAPM combines these three elements: cost of equity is the risk-free rate plus the market risk premium, adjusted by the stock's beta. But the result isn't an exact, unquestionable figure -- it depends on which risk-free rate, which risk-premium period, and which beta estimate are used. Two reasonable analysts can arrive at different estimates of the same company's cost of equity, without either necessarily being wrong.
\nThe next lesson combines the cost of debt and the cost of equity, weighted by their relative share in the company's financing, to obtain the WACC.
\nIf the risk-free rate is 3%, the market risk premium is 5%, and a stock's beta is 1.2, the cost of equity estimated with CAPM is 3% + 1.2 × 5% = 9%. With a beta of 0.8, that same calculation would give 3% + 0.8 × 5% = 7% -- the same company, a different cost of equity, just from having a different sensitivity to the market.
\nCost of equity is the minimum return a company's shareholders demand, not a book figure -- it shouldn't be confused with equity. CAPM is the most widely used model for estimating it: risk-free rate plus market risk premium, adjusted by the stock's beta. The result is a reasoned estimate, sensitive to its assumptions, not an unquestionable figure.
\nWhy isn't cost of equity the same as equity, despite the similar names?
\nWhat three elements does CAPM combine to estimate cost of equity, and why isn't the result an exact figure?
","sortOrder":2,"readingMinutes":9,"difficulty":"Intermedio"},"previous":{"id":61,"moduleId":22,"slug":"what-is-the-cost-of-debt","title":"What is the cost of debt?","summary":"You know what a company's cost of debt is and why the cost that really matters is the after-tax cost.","bodyMarkdown":"## Objectives\n\nBy the end of this lesson you know what a company's cost of debt is and why the cost that really matters is the after-tax cost.\n\n## Content\n\nROIC and DCF, already covered in earlier modules, used cost of capital as a general figure -- the minimum return a company should generate to justify the capital it has invested. This module starts pinning down that figure, component by component. The first is cost of debt.\n\nCost of debt is the effective interest rate a company pays on its financial debt -- the same financial debt that, already covered when calculating invested capital in Level 2, is distinguished from total liabilities: it doesn't include what's owed to suppliers or other items with no explicit financial cost, only debt that actually generates interest.\n\nBut the interest rate the company pays isn't, on its own, the real cost it bears. Interest on debt is tax-deductible: it reduces the income taxes are calculated on, so part of that interest is indirectly \"paid\" by the tax authorities, not the company. This is called the tax shield of debt. The cost of debt that really matters for valuing a company is the after-tax cost: the interest rate the company pays, multiplied by one minus its applicable tax rate.\n\nFor this reason -- and because lenders have priority of repayment over shareholders if the company runs into trouble, which makes debt less risky for whoever provides it -- the cost of debt is generally lower than the cost of equity, covered in the next lesson.\n\n## Example\n\nA company pays 5% annual interest on its financial debt. If its applicable tax rate is 25%, the after-tax cost of debt is 5% × (1 − 0.25) = 3.75% -- more than a percentage point below the nominal interest rate, precisely because of the tax shield.\n\n## Common mistakes\n\n- Using the nominal interest rate on debt without adjusting for the tax shield, which overstates the real cost the company bears.\n- Calculating the cost of debt on total liabilities instead of financial debt, confusing items with no explicit financial cost (like what's owed to suppliers) with real debt.\n\n## Summary\n\nCost of debt is the effective interest rate a company pays on its financial debt, adjusted for the tax shield on interest -- the after-tax cost, not the nominal rate. It's usually lower than the cost of equity because debt is less risky for whoever provides it.\n\n## Self-check\n\nWhy is the relevant cost of debt the after-tax cost and not the nominal interest rate?\n\nWhy is the cost of debt calculated on financial debt and not on total liabilities?","bodyHtml":"By the end of this lesson you know what a company's cost of debt is and why the cost that really matters is the after-tax cost.
\nROIC and DCF, already covered in earlier modules, used cost of capital as a general figure -- the minimum return a company should generate to justify the capital it has invested. This module starts pinning down that figure, component by component. The first is cost of debt.
\nCost of debt is the effective interest rate a company pays on its financial debt -- the same financial debt that, already covered when calculating invested capital in Level 2, is distinguished from total liabilities: it doesn't include what's owed to suppliers or other items with no explicit financial cost, only debt that actually generates interest.
\nBut the interest rate the company pays isn't, on its own, the real cost it bears. Interest on debt is tax-deductible: it reduces the income taxes are calculated on, so part of that interest is indirectly "paid" by the tax authorities, not the company. This is called the tax shield of debt. The cost of debt that really matters for valuing a company is the after-tax cost: the interest rate the company pays, multiplied by one minus its applicable tax rate.
\nFor this reason -- and because lenders have priority of repayment over shareholders if the company runs into trouble, which makes debt less risky for whoever provides it -- the cost of debt is generally lower than the cost of equity, covered in the next lesson.
\nA company pays 5% annual interest on its financial debt. If its applicable tax rate is 25%, the after-tax cost of debt is 5% × (1 − 0.25) = 3.75% -- more than a percentage point below the nominal interest rate, precisely because of the tax shield.
\nCost of debt is the effective interest rate a company pays on its financial debt, adjusted for the tax shield on interest -- the after-tax cost, not the nominal rate. It's usually lower than the cost of equity because debt is less risky for whoever provides it.
\nWhy is the relevant cost of debt the after-tax cost and not the nominal interest rate?
\nWhy is the cost of debt calculated on financial debt and not on total liabilities?
","sortOrder":1,"readingMinutes":7,"difficulty":"Intermedio"},"next":{"id":63,"moduleId":22,"slug":"how-is-wacc-calculated","title":"How is WACC calculated?","summary":"You understand how the cost of debt and the cost of equity are combined, weighted by the company's financing structure, to obtain the WACC.","bodyMarkdown":"## Objectives\n\nBy the end of this lesson you understand how the cost of debt and the cost of equity are combined, weighted by the company's financing structure, to obtain the WACC.\n\n## Content\n\nThe two previous lessons developed the cost of debt and the cost of equity separately. This lesson combines them into a single figure: the WACC (Weighted Average Cost of Capital). It's the precise specialization of the cost of capital that ROIC and DCF, already covered in earlier modules, have used up to now as a general figure -- both remain intact, it's just that now you know how to precisely calculate the figure they were already using.\n\nWACC doesn't average the cost of debt and the cost of equity equally -- it weights them according to each one's relative share in the company's total financing. That weight is calculated on the same financial debt and the same equity that, already covered when building invested capital in Level 2, make up the business's complete financing. If a company finances itself 40% with debt and 60% with equity, WACC weights the cost of debt at 40% and the cost of equity at 60% -- not 50% each.\n\nFormally, WACC is the sum of two terms: the weight of debt multiplied by the after-tax cost of debt, plus the weight of equity multiplied by the cost of equity. The higher a company's proportion of debt, the more its cost -- generally lower, as already seen in this module's first lesson -- weighs in the average, and the lower the resulting WACC, up to a point: an excessively indebted company starts becoming riskier both for its lenders and its shareholders, which raises both costs separately.\n\nThe final result is a single rate, but it shouldn't be read as an exact, unquestionable figure. WACC inherits all the sensitivity of its two components -- particularly that of the cost of equity, which depends on the CAPM assumptions already covered in the previous lesson -- and adds that of the financing weights used. With this precisely calculated figure, ROIC has a more exact reference point for judging whether a company creates or destroys value, and DCF has a more precise discount rate for bringing its future flows to present value.\n\n## Example\n\nA company finances itself 30% with debt and 70% with equity. Its after-tax cost of debt is 3.75% (from the first lesson) and its cost of equity estimated with CAPM is 9% (from the second lesson). Its WACC is: 0.30 × 3.75% + 0.70 × 9% = 1.125% + 6.3% = 7.425%.\n\n## Common mistakes\n\n- Averaging the cost of debt and the cost of equity equally, without weighting by each one's real share in the company's financing.\n- Presenting the resulting WACC as an exact, definitive figure, without accounting for the fact that it inherits the sensitivity of its two components -- especially the cost of equity, sensitive to CAPM's assumptions.\n\n## Summary\n\nWACC weights the after-tax cost of debt and the cost of equity according to each one's relative share in the company's financing. It's the precise specialization of the cost of capital that ROIC and DCF already used in general terms, and it inherits the sensitivity of its two components -- it's not an exact, unquestionable figure, but a reasoned estimate.\n\n## Self-check\n\nWhy doesn't WACC average the cost of debt and the cost of equity equally?\n\nWhy shouldn't WACC be read as an exact, definitive figure?","bodyHtml":"By the end of this lesson you understand how the cost of debt and the cost of equity are combined, weighted by the company's financing structure, to obtain the WACC.
\nThe two previous lessons developed the cost of debt and the cost of equity separately. This lesson combines them into a single figure: the WACC (Weighted Average Cost of Capital). It's the precise specialization of the cost of capital that ROIC and DCF, already covered in earlier modules, have used up to now as a general figure -- both remain intact, it's just that now you know how to precisely calculate the figure they were already using.
\nWACC doesn't average the cost of debt and the cost of equity equally -- it weights them according to each one's relative share in the company's total financing. That weight is calculated on the same financial debt and the same equity that, already covered when building invested capital in Level 2, make up the business's complete financing. If a company finances itself 40% with debt and 60% with equity, WACC weights the cost of debt at 40% and the cost of equity at 60% -- not 50% each.
\nFormally, WACC is the sum of two terms: the weight of debt multiplied by the after-tax cost of debt, plus the weight of equity multiplied by the cost of equity. The higher a company's proportion of debt, the more its cost -- generally lower, as already seen in this module's first lesson -- weighs in the average, and the lower the resulting WACC, up to a point: an excessively indebted company starts becoming riskier both for its lenders and its shareholders, which raises both costs separately.
\nThe final result is a single rate, but it shouldn't be read as an exact, unquestionable figure. WACC inherits all the sensitivity of its two components -- particularly that of the cost of equity, which depends on the CAPM assumptions already covered in the previous lesson -- and adds that of the financing weights used. With this precisely calculated figure, ROIC has a more exact reference point for judging whether a company creates or destroys value, and DCF has a more precise discount rate for bringing its future flows to present value.
\nA company finances itself 30% with debt and 70% with equity. Its after-tax cost of debt is 3.75% (from the first lesson) and its cost of equity estimated with CAPM is 9% (from the second lesson). Its WACC is: 0.30 × 3.75% + 0.70 × 9% = 1.125% + 6.3% = 7.425%.
\nWACC weights the after-tax cost of debt and the cost of equity according to each one's relative share in the company's financing. It's the precise specialization of the cost of capital that ROIC and DCF already used in general terms, and it inherits the sensitivity of its two components -- it's not an exact, unquestionable figure, but a reasoned estimate.
\nWhy doesn't WACC average the cost of debt and the cost of equity equally?
\nWhy shouldn't WACC be read as an exact, definitive figure?
","sortOrder":3,"readingMinutes":8,"difficulty":"Intermedio"},"pathContext":null,"curatedLinks":{"prerequisite":[],"continuation":[],"related":[]},"relatedConcepts":[{"concept":{"id":75,"slug":"cost-of-equity","term":"Cost of equity","shortDefinition":"The minimum return a company's shareholders demand for taking on the risk of investing in it -- not a book figure on the balance sheet.","longDefinition":"Cost of equity is the minimum return a company's shareholders demand for taking on the risk of investing in it -- a percentage, not a monetary figure. It shouldn't be confused with equity itself, already covered in Level 2: equity is a book value on the balance sheet -- what's left of assets after subtracting liabilities -- while cost of equity is a required rate of return, a completely different magnitude despite the similar names. The most widely used model for estimating it is CAPM (Capital Asset Pricing Model): it starts from the risk-free rate -- what a virtually risk-free investment would yield -- and adds a market risk premium, adjusted by the stock's beta, which measures how much its returns move relative to the market as a whole. The result depends on which risk-free rate, risk premium, and beta are used -- it's a reasoned estimate, not an exact, unquestionable figure."}}]}