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CMA Intermediate · Financial Management and Business Data Analytics

Cost of Capital for CMA Intermediate Financial Management

Cost of capital is the minimum return a firm must earn on an investment to satisfy its capital providers. You solve questions by finding the cost of each source (debt, preference, equity, retained earnings), then weighting them by capital structure to get WACC, using market or book weights as the question states.

What this chapter covers

This chapter answers one question: what does it cost a company to raise money? Every source of finance has a cost, because investors expect a return. You learn to compute that cost for debt, preference shares, equity shares and retained earnings, and then combine them into one figure.

The combined figure is the Weighted Average Cost of Capital (WACC). The Marginal Cost of Capital is the cost of raising the next rupee of new funds. Debt cost is adjusted for tax because interest is deductible, while dividends are not. Equity cost can be found by several methods, such as the dividend growth model and CAPM, so you must know which to use from the data given.

This chapter is the base for the rest of Financial Management. WACC is the discount rate in capital budgeting (NPV and IRR). It also feeds capital structure and leverage decisions, and the dividend decision. If you are weak here, errors carry into those chapters. Numerical questions here are also formula-driven, so they are good for step marks.

Cost of capital is a compact, formula-based chapter, so careful practice turns directly into marks in both the MCQ section and the 14-mark written questions. Its concepts also run through capital budgeting and capital structure, so one solid effort here pays off in several chapters. A WACC question usually has many small steps, and each correct step earns marks even if the final answer slips.

Cost of Capital: topics in the order to study them

  1. 1Cost of Capital: Meaning and ConceptsStart with the idea of required return, explicit and implicit cost, and specific versus composite cost, so the formulas that follow make sense.
  2. 2Cost of DebtThis is the simplest source and introduces the tax adjustment, which you will reuse in WACC.
  3. 3Cost of Preference Share CapitalIt is similar to debt (fixed payment, redeemable or irredeemable) but with no tax shield, so the contrast with debt is easy to remember.
  4. 4Cost of Equity Share CapitalThis is the hardest component with several methods, so study it once the simpler costs are comfortable.
  5. 5Cost of Retained EarningsIt builds directly on the cost of equity, so it comes straight after it.
  6. 6Weighted Average Cost of Capital (WACC)Now you combine every specific cost using weights, which needs all earlier formulas.
  7. 7Marginal Cost of CapitalIt extends WACC to new funds raised, so learn it last.

How to prepare Cost of Capital

Treat this chapter as a set of formulas you must apply under the exact conditions the question gives. Practise in layers, from single costs to WACC.

  1. Write a one-page formula sheet with each cost, and note beside it whether it is pre-tax or post-tax and what price (face value, issue price, net proceeds) goes in the denominator.
  2. Solve three to four small problems on each source of capital before moving on, including redeemable cases using the approximation formula.
  3. Practise cost of equity by each method (dividend yield, dividend plus growth, earnings yield, CAPM) and learn the clue in the question that points to each.
  4. Do WACC problems with both book value and market value weights, and set out a table with source, amount, weight, cost and weighted cost.
  5. Solve marginal cost of capital problems by finding the cost of the new funds and the weights of the new financing, noting any change in cost at higher amounts.
  6. Attempt the MCQs on conceptual points, such as which cost has a tax shield, and then time yourself on a full 14-mark question.
  7. Revise the formula sheet and redo your wrong answers after a few days.

Common mistakes in Cost of Capital

  • Applying the tax adjustment to preference shares or equity

    Fix: Only interest is tax deductible. Adjust debt by (1 − t) and leave preference and equity costs as they are.

  • Using face value instead of net proceeds in the denominator

    Fix: For issue cost, use net proceeds (issue price less flotation cost). For equity by market methods, use the current market price as the question directs.

  • Using D0 instead of D1 in the growth model

    Fix: Check whether the dividend is already expected next year. If it is the last paid dividend, compute D1 = D0 × (1 + g) first.

  • Mixing book value and market value weights

    Fix: Use the basis the question states, and use the same basis for all sources in one table.

  • Weights that do not add up to 100%

    Fix: Total the amounts first, divide each by the total, and check the weights sum to 1 before multiplying.

  • Losing step marks by showing only the final answer

    Fix: Show the formula, the substitution and a WACC table. Each step is marked even if the final figure is wrong.

Last-day revision: Cost of Capital

  • Cost of capital is the minimum required return that keeps the firm's value unchanged.
  • Post-tax cost of debt = Kd × (1 − t), where Kd is the pre-tax cost and t is the tax rate.
  • Debt has a tax shield; preference dividend and equity dividend do not.
  • Irredeemable preference cost = Preference dividend ÷ Net proceeds.
  • Redeemable approximation: [Annual payment + (Redemption value − Net proceeds) ÷ n] ÷ [(Redemption value + Net proceeds) ÷ 2].
  • Dividend growth model: Ke = D1 ÷ P0 + g, where D1 = D0 × (1 + g).
  • CAPM: Ke = Rf + β × (Rm − Rf).
  • Earnings yield method: Ke = EPS ÷ Market price, used when earnings are expected to be constant.
  • Cost of retained earnings is usually taken as equal to the cost of equity, adjusted for any tax or brokerage if the question asks.
  • WACC = Σ(weight × cost of each source), and the weights must add up to 100%.
  • Market value weights reflect current conditions; book value weights are easier to compute.
  • Marginal cost of capital is the weighted cost of the next lot of funds raised, using target proportions.

Cost of Capital practice questions

Cost of Capital in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Cost of Capital: frequently asked questions

Which formulas matter most in Cost of Capital for CMA Inter?

Learn the post-tax cost of debt, the redeemable approximation, the dividend growth model, CAPM and WACC. These cover most numerical questions. Know when each applies from the data given.

Should I use book value or market value weights in WACC?

Follow the question. If it gives market values and asks for market weights, use them. If it gives only book values, use book weights. Do not mix the two in one calculation.

Is the cost of retained earnings the same as the cost of equity?

In most textbook problems it is taken as equal to the cost of equity, since shareholders expect the same return on funds kept back. Adjust only if the question gives specific adjustments such as tax or brokerage.

How does this chapter link to capital budgeting?

WACC is commonly used as the discount rate for evaluating projects through NPV, and as the hurdle rate for IRR. A wrong WACC here leads to a wrong decision there.