Factors Affecting Capital Structure:

1. Trading on Equity (Financial Leverage): It refers to the use of fixed income securities such as debentures and preference capital in the capital structure so as to increase the return of equity shareholders. 

2. Stability of Earnings: If the company is earning regular and reasonable income, the management can rely on preference shares or debentures. Otherwise issue of equity shares is recommended. 

3. Cost of Debt: A rm’s ability to borrow at lower rate, increases its capacity to employ higher debt. 

4. Interest Coverage Ratio (ICR): The interest coverage ratio refers to the number of times earnings before interest and taxes of a company covers the interest obligation. Higher the ratio, better is the position of the rm to raise debt.

5. Desire for control: If the management has a desire to control the business, it will prefer preference shares and debentures in capital structure because they have no voting rights.

6. Flexibility: Capital structure should be capable of being adjusted according to the needs of changing conditions. 

7. Capital Market Conditions: In depression, debentures are considered good. In a booming situation, issue of shares will be more preferable. 

8. Period of Finance: If funds are required for short period, borrowing from bank should be preferred. If funds are required for longer period company can issue shares and debentures.

9. Taxation Policy: interest on loan and debentures is deductible item under the Income Tax Act whereas dividend is not deductible. In order to take advantage of this provision, companies may issue debentures. 

10. Legal Requirements: The structure of capital of a company is also influenced by the statutory requirements.

For example, Banking Regulation Act, Indian Companies Act, SEBI, etc.