Skip to content

Financial Management and Strategic Management · Financing Decisions - Capital Structure

Capital Structure Planning and Its Determinants for CA Inter

Updated 4 October 2026 · Fact-checked

Capital structure is the mix of long-term debt, preference and equity a firm uses to finance itself. Planning aims at an optimal mix that maximises shareholder wealth at acceptable risk. To answer questions, state the optimal features, link the given facts to determinants, then apply cash flow or ROI-ROE analysis with working.

Understand Capital Structure Planning and Determinants

Capital structure is the proportion of long-term sources of finance a company uses: equity share capital, reserves, preference shares, debentures and term loans. Financial structure is wider. It covers the whole right-hand side of the balance sheet, so it also includes short-term sources such as trade creditors and bank overdraft. Capital structure is therefore a part of financial structure.

Every source has a cost and a risk. Debt is usually cheaper because interest is tax-deductible and lenders face less risk. But interest is a fixed charge. If earnings fall, a highly geared firm may fail to pay it. Equity costs more but carries no fixed payment. Capital structure planning is the search for the mix where overall cost is low and risk is controlled.

An optimal capital structure is the mix that maximises the value of the firm and minimises the overall cost of capital. Its usual features are: profitability (use as much debt as the firm's earnings can support), flexibility (room to raise more funds when needed), conservation or conservatism (do not take on debt up to the limit of the firm's capacity, so a margin of safety remains for bad times), solvency (use of debt that does not endanger the firm's ability to meet its obligations) and control (avoid undue dilution of owners' control).

Many factors shape the mix. Key ones are the cost of each source, risk (business and financial), cash flow position, control, flexibility, size of the company, nature of the industry, tax shield on interest, market conditions, capital market state, the stage of the firm's life, and the attitude of management and lenders. A stable-earning firm can carry more debt than a volatile one.

Two analytical approaches are tested. The cash flow approach is a projection of the firm's future cash flows set against its fixed obligations, mainly interest and repayment of principal. The more stable and larger the expected cash flows relative to these obligations, the more debt is safe. ICAI does not prescribe one single ratio for this. A debt-service coverage measure is a handy way to show the comparison, but treat it as illustrative.

In the ROI-ROE analysis you compare return on investment (ROI = EBIT ÷ capital employed, a pre-tax measure) with the pre-tax interest rate. If ROI is greater than the interest rate, debt raises return on equity (ROE). If ROI is less, debt lowers ROE. This holds when the same tax rate applies to the operating profit and to the interest saved. If you prefer to compare after tax, compare ROI × (1 − t) with interest rate × (1 − t). The conclusion is the same.

Key rules to remember

Financial structure vs capital structure
Financial structure = All liabilities (long-term + short-term) + equity; Capital structure = Long-term debt + preference + equity
Capital structure excludes current liabilities. Use this for the difference question.
Return on investment (pre-tax)
ROI = EBIT ÷ Total capital employed × 100
Compare with the pre-tax interest rate to judge the effect of debt.
Return on equity
ROE = (EBIT − Interest − Tax) ÷ Equity shareholders' funds × 100
Use net worth, and deduct preference dividend if preference shares exist and the question asks for equity return.
Effect of debt on ROE
If ROI > interest rate, ROE rises with more debt; if ROI < interest rate, ROE falls
Compare pre-tax ROI (EBIT ÷ capital employed) with the pre-tax interest rate. This holds when the tax rate is the same on both. On an after-tax basis, compare ROI × (1 − t) with interest rate × (1 − t); the conclusion is the same. Rule describes direction only.
Illustrative debt-service coverage measure (not a prescribed ICAI formula)
Debt-service coverage = Cash flow available for fixed charges ÷ (Interest + Principal repayment)
Use it only to illustrate the cash flow approach. The approach itself is a projection of cash flows against fixed obligations. A higher figure suggests the firm can carry more debt. If the question gives its own method, follow that.
Interest coverage ratio
ICR = EBIT ÷ Interest
A simple test of debt-servicing ability from earnings.

How to solve Capital Structure Planning and Determinants questions

Questions come in two forms: theory (features, factors, differences) and numerical (cash flow or ROI-ROE analysis). Use this method for both.

  1. 1Read the verb. 'Explain', 'discuss' or 'state' needs points with one line of reasoning each. 'Calculate' or 'analyse' needs working.
  2. 2For theory, list the points under clear bold headings, such as profitability, flexibility, conservation, solvency, control.
  3. 3Tie each point to the case facts if a scenario is given, for example a stable-earning firm can use more debt.
  4. 4For ROI-ROE, compute pre-tax ROI (EBIT ÷ capital employed) and compare it with the pre-tax interest rate. This works when the same tax rate applies to both. If you compare after tax, use ROI × (1 − t) against interest rate × (1 − t).
  5. 5Compute ROE under each financing plan using EBIT, interest, tax and equity base. Show each line.
  6. 6For the cash flow approach, project cash flows, set them against interest and principal repayment, and show the comparison. A coverage figure (cash flow ÷ interest plus principal) can illustrate it. Say it is an illustrative measure.
  7. 7Compare the results and give a conclusion: which plan is better and why.
  8. 8State the caveat briefly, for example higher debt increases financial risk even if ROE rises.

Quickest way: Fast route for MCQs and written answers

When to use it: Use under time pressure, especially for the 2-mark MCQs and 4-5 mark short notes.

  1. MCQ: if ROI is more than the interest rate, pick the option where debt increases ROE. If less, pick where it reduces ROE.
  2. MCQ: capital structure means long-term sources only. Eliminate options that include current liabilities.
  3. MCQ: when asked which firm can take more debt, choose the one with stable, predictable cash flows.
  4. Written theory: write 5 features or 6 factors as bold keywords, each with a one-line reason. Step marks come from covering each point.
  5. Written numerical: draw a three-column table of plans (equity only, debt mix) with EBIT, interest, PBT, tax, PAT, ROE. Show a formula line before each figure.
  6. End with a one-line conclusion; examiners give marks for interpretation.

Common mistakes in Capital Structure Planning and Determinants

  • Treating capital structure and financial structure as the same thing.

    Both words describe how a firm is financed and look alike.

    Fix: Remember that capital structure is long-term only. Financial structure includes short-term liabilities too.

  • Mixing pre-tax and post-tax figures when comparing ROI with the interest rate.

    Students remember the tax shield and adjust only the interest rate, while ROI (EBIT ÷ capital employed) is still pre-tax.

    Fix: Compare pre-tax ROI with the pre-tax interest rate. If you work after tax, adjust both sides: ROI × (1 − t) against interest rate × (1 − t). The conclusion is the same.

  • Saying more debt always raises ROE.

    Debt is cheaper, so students assume it always helps.

    Fix: State the condition. ROE rises only when ROI exceeds the cost of debt. Otherwise it falls.

  • Leaving out principal repayment in the cash flow approach.

    Students look only at interest as the fixed charge.

    Fix: Set projected cash flows against both interest and scheduled principal repayment, since both are fixed obligations.

  • Presenting the debt-service coverage figure as a standard ICAI formula.

    A ratio feels like a formula that must be memorised.

    Fix: Describe the cash flow approach as a projection of cash flows against fixed obligations. Call any coverage ratio illustrative.

  • Listing factors without linking to the case given.

    Students write memorised lists to save time.

    Fix: Pick the factors relevant to the scenario and add one line connecting each to the facts.

  • Using total capital instead of equity as the base for ROE.

    Confusion between ROI and ROE denominators.

    Fix: ROI uses capital employed. ROE uses equity shareholders' funds.

Worked examples

Example 1

A company has capital employed of ₹10,00,000 and EBIT of ₹2,00,000. It can finance entirely by equity, or by 50% equity and 50% 10% debentures. Tax rate is 25%. Calculate ROE under both plans and comment.

Show the solution
  1. ROI = 2,00,000 ÷ 10,00,000 × 100 = 20%. This is more than the 10% interest rate, so debt should raise ROE.
  2. Plan A (all equity): equity = ₹10,00,000. Interest = 0. PBT = ₹2,00,000. Tax at 25% = ₹50,000. PAT = ₹1,50,000.
  3. ROE (A) = 1,50,000 ÷ 10,00,000 × 100 = 15%.
  4. Plan B: equity = ₹5,00,000; debentures = ₹5,00,000. Interest = 10% × 5,00,000 = ₹50,000.
  5. PBT = 2,00,000 − 50,000 = ₹1,50,000. Tax at 25% = ₹37,500. PAT = ₹1,12,500.
  6. ROE (B) = 1,12,500 ÷ 5,00,000 × 100 = 22.5%.
  7. Plan B gives higher ROE because ROI of 20% is above the 10% cost of debt.

Answer: ROE is 15% under Plan A and 22.5% under Plan B. Plan B is better for return, but it adds fixed interest of ₹50,000 and so more financial risk.

Example 2

Explain the features of an optimal capital structure and, using the cash flow approach, state whether a firm with annual cash flow available for fixed charges of ₹6,00,000, interest of ₹2,00,000 and yearly principal repayment of ₹2,00,000 can service its debt.

Show the solution
  1. Features of an optimal capital structure: profitability (maximum use of debt that earnings support), flexibility (ability to raise more funds later), conservation (keep a margin of safety, not borrowing to the limit), solvency (debt that does not endanger the firm's ability to meet obligations) and control (limited dilution of owners' control).
  2. Cash flow approach: set projected cash flow against fixed obligations. Fixed obligations = interest + principal repayment = 2,00,000 + 2,00,000 = ₹4,00,000.
  3. As an illustrative debt-service coverage measure: 6,00,000 ÷ 4,00,000 = 1.5 times. This is not a prescribed ICAI ratio.
  4. Since cash flow exceeds fixed obligations by ₹2,00,000 (6,00,000 − 4,00,000), the firm can service its debt, with a margin.
  5. Caution: if cash flows are volatile, the margin may be too thin. Stable cash flows would support the debt level.

Answer: The firm can service its debt. Cash flow of ₹6,00,000 covers fixed obligations of ₹4,00,000, an illustrative coverage of 1.5 times and a surplus of ₹2,00,000. It should not add much more debt unless its cash flows are stable.

Exam tips

  • For 'distinguish between capital structure and financial structure', answer in two or three points: coverage of liabilities, time horizon and what each includes.
  • In ROI-ROE problems, always show pre-tax ROI first and compare it with the pre-tax interest rate. This earns the interpretation mark.
  • Write the factors as bold keywords and add a short reason. A bare list scores less.
  • In case-based questions, name only the factors that fit the scenario, such as stable cash flows or control concerns.
  • In the cash flow approach, describe it as projected cash flows against fixed obligations. If you use a coverage ratio, call it illustrative.
  • Finish numerical answers with a one-line conclusion that mentions the risk side of debt.

Practice questions from Financing Decisions - Capital Structure

Capital Structure Planning and Determinants in other exams

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

Capital Structure Planning and Determinants: frequently asked questions

What is the difference between capital structure and financial structure?

Capital structure is the mix of long-term sources: equity, preference shares, debentures and term loans. Financial structure includes all liabilities, so it also covers short-term sources such as trade creditors and bank overdraft. Capital structure is a subset of financial structure.

What are the main features of an optimal capital structure?

The main features are profitability, flexibility, conservation (or conservatism), solvency and control. The mix should keep overall cost low and value high. It should also let the firm raise funds later without undue risk.

What is the cash flow approach to capital structure?

It tests how much debt a firm can carry by projecting its cash flows against its fixed obligations, which are interest and principal repayment. The larger and steadier the cash flows, the more debt the firm can safely use. A debt-service coverage figure can illustrate this, but it is not a single prescribed ICAI formula.

How does ROI-ROE analysis help in capital structure planning?

It compares the pre-tax return on investment with the pre-tax cost of debt, assuming the same tax rate applies to both. If ROI is higher than the interest rate, more debt raises ROE. If ROI is lower, debt reduces ROE. It helps you choose the financing plan but does not measure the extra risk.