This document provides an overview of capital structure concepts and theories. It defines capital structure as the mix of owned and borrowed capital used to finance a company's assets. Several capital structure theories are described, including the Net Income Approach, Net Operating Income Approach, Modigliani-Miller Approach, and Traditional Approach. The Net Income Approach suggests that increasing debt lowers cost of capital and increases firm value until business risk increases. The Net Operating Income and Modigliani-Miller Approaches argue that capital structure does not affect firm value. The Traditional Approach proposes an optimal capital structure that minimizes cost of capital.

1. Capital Structure
Presented by
Prof. P. Basatin Arockia Raj
Dept. of BBA
St.Joseph’s College
Trichy

2. • Capital Structure concept
• Capitalization and Capital
Structure
• Financial structure and capital
structure
• Forms of capital structure
Capital Structure
• Capital Structure theories –
 Net Income
 Net Operating Income
 Modigliani-Miller
 Traditional Approach

3. Capital structure can be defined as the
mix of owned capital and borrowed
capital
Maximization of shareholders’ wealth is
prime objective of a financial manager.
Capital Structure

4. Capitalization and Capital Structure
Capitalization refers to the total amount of
long-term funds employed by the firm.
Capital structure signifies the kinds of
securities and their proportion in the total
capitalization of a firm.

5.  Financial structure is different from capital structure.It
means the composition of the entire liabilities side of the
balance sheet.
 It shows the way in which the firm’s assets are financed.
Financial structure includes long-term as well as short-term
sources of finance.
 Capital structure signifies the proportion of long-term
sources of finance in the capitalization of the firm.
 It is represented by shareholders’ funds and long-term
loans. Capital structure is a part of the financial structure.
Financial structure and capital structure.

6. Forms of pattern of Capital Structure:
The capital structure of a new company generally includes the
following:
a) Equity shares
b) Preference shares
c) Debentures or Bonds
d) Long-term loans

7. Theories of Capital Structure
The four major theories of approaches which
explain the relationship between capital structure, cost of
capital and valuation of firm are:
1. Net Income (NI) Approach
2. Net Operating Income (NOI) Approach
3. The Traditional Approach
4. Modigliani-Miller (MM) Approach

8. ASSUMPTIONS –
 Firms use only two sources of funds –
equity & debt.
 No change in investment decisions of
the firm, i.e. no change in total assets.
 100 % dividend payout ratio, i.e. no
retained earnings.
 Business risk of firm is not affected by
the financing mix.
 No corporate or personal taxation.
 Investors expect future profitability of
the firm.
Capital Structure Theories

9. Capital Structure Theories –
A) Net Income Approach (NI)
Relationship between capital structure and
value of the firm.
 Its cost of capital (WACC), and thus directly affects the
value of the firm.
 NI approach assumptions –
o NI approach assumes that a continuous increase in debt does
not affect the risk perception of investors.
o Cost of debt (Kd) is less than cost of equity (Ke) [i.e. Kd < Ke ]
o Corporate income taxes do not exist.

10. Capital Structure Theories –
A) Net Income Approach (NI)
The total market value of the firm (V) under the Net Income
Approach is ascertained by the following formula.
V = S+D
 V = Total market value of the firm
 S = Market value of equity shares
 D = Market value of debt
The overall cost of capital (Ko) Or Weighted average
cost of capital is calculated under
Ko = EBIT/V

11. Capital Structure Theories –
A) Net Income Approach (NI)
ke
ko
kd
Debt
Cost
kd
ke, ko
As the proportion of
debt (Kd) in capital
structure increases,
the WACC (Ko)
reduces.

12. Capital Structure Theories –
B) Net Operating Income (NOI)
 Net Operating Income (NOI) approach is the exact opposite
of the Net Income (NI) approach.
 As per NOI approach, value of a firm is not dependent
upon its capital structure.
 Assumptions –
o WACC is always constant, and it depends on the business risk.
o Value of the firm is calculated using the overall cost of capital
i.e. the WACC only.
o The cost of debt (Kd) is constant.
o Corporate income taxes do not exist.

13. Capital Structure Theories –
B) Net Operating Income (NOI)
 NOI propositions (i.e. school of thought) –
The use of higher debt component (borrowing) in the capital
structure increases the risk of shareholders.
Increase in shareholders’ risk causes the equity capitalization
rate to increase, i.e. higher cost of equity (Ke)
A higher cost of equity (Ke) nullifies the advantages gained
due to cheaper cost of debt (Kd )
In other words, the finance mix is irrelevant and does not
affect the value of the firm.

14. Capital Structure Theories –
B) Net Operating Income (NOI)
 Cost of capital (Ko)
is constant.
 As the proportion
of debt increases,
(Ke) increases.
 No effect on total
cost of capital (WACC)
ke
ko
kd
Debt
Cost

15. Capital Structure Theories –
C) Modigliani – Miller Model (MM)
 MM approach supports the NOI approach, i.e. the capital
structure (debt-equity mix) has no effect on value of a firm.
 MODIGLIANI- MILLER explain the relationship
between capital structure, cost of capital and value of the
firm under two conditions:
1. When there is no corporate taxes
2. When there is corporate taxes

16. Capital Structure Theories –
C) Modigliani – Miller Model (MM)
WHEN THERE IS NO CORPORATE TAXES
 The MODIGLIANI- MILLER Approach is identical to
NOI approach when there are no corporate taxes.
 MODIGLIANI- MILLER argue that in the absence of
taxes, the cost of capital and value of the firmare not affected
by capital structure or debt-equity mix.

17. Modigliani – Miller Model (MM)
Assumption
The MM hypothesis is based on the following
assumption
 There is perfect market. It implies that
(a). Investors are free to buy and
sell securities:
(b). they can borrow freely on the
same term as the firms do;
(c). Investors act in a rational
manner.

18. Capital Structure Theories –
C) Modigliani – Miller Model (MM)
 There are no corporate taxes.
 There are no transaction costs.
 The payout is 100 per cent. That is, all the
earnings are distributed to shareholders.
 Firms can be grouped into homogeneous
risk classes.

19. Capital Structure Theories –
C) Modigliani – Miller Model (MM)
2. When there are corporate taxes:
Modigliani an Miller have recognized that capital structure
would affect the cost of capital an value of the firm, when
there are corporate taxes.
If a firm uses debt in its capital structure, the cost of
capital will decline an market value will increases. This is
because of the deductibility of interest charges for
computation of tax

20. Modigliani – Miller Model……
 According to the M-M approach, the value of an unlevered
firm (Which does not use debt ) can be calculated as follows.
 Value of unlevered firm, Vu = EBIT/ Ke (1-T)
Where EBIT = Earnings Before Interest an Taxes
T = Tax rate Ke = Cost of equity
VL = Vu = (T x D)
Value of levered firm = Value of unlevered firm = (Tax rate
x Debt)

21. Criticism of MM Approach
1. Markets are not perfect
2. Higher interest for individuals
3. Personal leverage is no substitute for corporate leverage
4. Transaction costs
5.Corporate taxes

22. Capital Structure Theories –
D) Traditional Approach
 The NI approach and NOI approach hold extreme views on
the relationship between capital structure, cost of capital and
the value of a firm.
 Traditional approach (‘intermediate approach’) is a compromise
between these two extreme approaches.
 Traditional approach confirms the existence of an optimal
capital structure; where WACC is minimum and value is the
firm is maximum.
 As per this approach, a best possible mix of debt and equity
will maximize the value of the firm.

23. Capital Structure Theories –
D) Traditional Approach
The approach works in 3 stages –
1) Value of the firm increases with an increase in borrowings
(since Kd < Ke). As a result, the WACC reduces gradually.
This phenomenon is up to a certain point.
2) At the end of this phenomenon, reduction in WACC ceases
and it tends to stabilize. Further increase in borrowings will
not affect WACC and the value of firm will also stagnate.
3) Increase in debt beyond this point increases shareholders’
risk (financial risk) and hence Ke increases. Kd also rises due
to higher debt, WACC increases & value of firm decreases.

24. Capital Structure Theories –
D) Traditional Approach
ke
ko
kd
Debt
Cost
 Cost of capital (Ko)
is reduces initially.
 At a point, it settles
 But after this point,
(Ko) increases, due
to increase in the
cost of equity. (Ke)

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