Debentures are a type of debt instrument that companies use to raise money from investors. Instead of borrowing directly from a bank, a company can issue debentures to investors and agree to pay interest at a specified rate and repay the principal according to the terms of the issue.

For investors, debentures can provide regular interest income and diversification. However, the level of risk depends on factors such as whether the debenture is secured or unsecured, the issuer's creditworthiness, the terms of the issue and prevailing market conditions.

If you are wondering what a debenture is, how it works, what the types of debentures are, or the difference between a bond and debenture, this guide explains the concept in simple terms.

What Is Debenture?

A debenture is a debt instrument through which a company raises funds from investors. In return, the company agrees to pay interest and repay the principal amount in accordance with the terms of the issue.

The definition of a debenture can therefore be understood as a written acknowledgement of debt issued by a company. Depending on its structure, a debenture may be secured or unsecured and may be convertible into equity shares or non-convertible.

For example, suppose a company issues a debenture with a face value of ₹1,000 carrying an annual interest rate of 8%. An investor holding one such debenture will receive ₹80 as annual interest. However, the principal amount is repaid when it matures, or the tenure ends.  

How Do Debentures Work?

The process is relatively straightforward:

1. Company raises funds: A company decides to raise money through a debenture issue.
2. Terms are specified: The issue documents mention details such as face value, interest rate, maturity, security and redemption terms.
3. Investors subscribe: Investors purchase the debentures and provide funds to the company.
4. Interest is paid: The company pays interest according to the agreed schedule.
5. Principal is repaid: At maturity, the company generally repays the principal, subject to the terms of the issue.

The terms can vary by issue, so investors should read the offer document and understand the associated risks before investing.

Types of Debentures

There are several types of debentures, which can be classified by security, convertibility, redemption, and other characteristics.

1. Secured Debentures

Secured debentures are backed by specified assets or a charge over the issuer's assets. For example, a company may issue secured debentures backed by its land, buildings or machinery. If the company defaults, these assets may be used to recover the dues, subject to the terms of the security and applicable law. 

However, secured debentures are not risk-free, so investors should assess the issuer's financial position and the terms of the security.

2. Unsecured Debentures

Unsecured debentures are not backed by specific collateral. Investors primarily rely on the issuer's creditworthiness and ability to meet its payment obligations.

Because there is no specific collateral backing the instrument, investors should pay particular attention to the issuer's credit quality and financial position.

3. Convertible Debentures

Convertible debentures are debt securities that may be converted into equity shares of the issuing company according to predetermined terms.

They combine characteristics of debt and equity. Until conversion, the investor may receive interest as specified in the terms. If the conversion option is exercised, the debenture can be converted into shares according to the specified conversion ratio and conditions.

4. Non-Convertible Debentures

Non-convertible debentures, commonly called NCDs, cannot be converted into equity shares of the issuing company under their terms.

They are generally issued with a specified interest rate and maturity period. Listed NCDs may also be traded in the secondary market, subject to market liquidity.

5. Redeemable Debentures

Redeemable debentures have a specified date or mechanism for repayment of the principal. At the end of the relevant period, the issuer repays the debenture according to the issue terms.

6. Perpetual Debentures

Perpetual debentures do not have a fixed maturity date in the conventional sense. Their terms determine how and when interest is paid and whether the issuer has any call or redemption rights.

These instruments can have complex structures, so investors should carefully study the issue terms before investing.

Convertible Debentures vs Non-Convertible Debentures

The key difference is whether the instrument can be converted into equity shares.

The choice depends on the investor's objectives, risk tolerance and understanding of the particular issue.

Features of Debentures

Some of the key features of debentures include:

1. Debt Instrument

Debentures represent money borrowed by a company from investors. The company is required to meet its repayment and interest obligations according to the terms of the issue.

2. Regular Interest Payments

Debentures may offer periodic interest payments at a fixed or floating rate. However, the payment terms depend on the specific issue, and not all debentures necessarily offer regular interest.

3. Defined Repayment Terms

Most debentures specify a maturity date by which the principal is due for repayment. Some instruments may have different redemption arrangements, depending on their terms.

4. Secured or Unsecured

Debentures may be secured against specific company assets or issued without collateral. The level of protection depends on the security arrangement and the instrument's terms.

5. Convertible or Non-Convertible

Convertible debentures can be converted into equity shares under specified conditions, while non-convertible debentures cannot be converted into shares.

Advantages of Debentures

Debentures can offer certain benefits to both companies and investors.

For Companies

1. Access to capital

Companies can raise funds without immediately issuing additional equity shares.

2. No immediate dilution of ownership

Raising funds through debt does not generally dilute existing shareholders' ownership in the same way as issuing new equity shares.

3. Flexible financing

Companies can structure the interest rate, maturity and other terms according to applicable regulations and financing requirements.

For Investors

1. Regular income

Debentures may provide periodic interest income according to the issue terms.

2. Diversification

Debt securities can form part of a diversified investment portfolio.

3. Defined maturity

Many debentures have a predetermined maturity date, allowing investors to understand when the principal is scheduled to be repaid.

Risks of Investing in Debentures

Before investing in debentures, investors should understand the associated risks.

1. Credit Risk

The issuer may fail to pay interest or repay the principal on time. Credit risk is particularly important when investing in corporate debt.

2. Interest Rate Risk

When market interest rates rise, the market value of existing fixed-rate debt securities can decline. Conversely, falling interest rates can support the market value of existing securities with relatively higher coupon rates.

3. Liquidity Risk

A debenture may not always be easy to sell at the desired price. Liquidity can vary significantly between securities.

4. Reinvestment Risk

If interest rates decline, investors may have to reinvest interest income or maturity proceeds at lower rates.

5. Market Risk

For listed debentures, market prices can fluctuate due to changes in interest rates, credit perception, liquidity and broader market conditions.

Things to Check Before Investing in Debentures

Before investing, consider:

• Credit rating and issuer quality
• Coupon or interest rate
• Yield to maturity, where applicable
• Maturity period
• Secured or unsecured status
• Credit enhancement or security structure
• Liquidity in the secondary market
• Tax implications
• Terms relating to redemption, call or put options
• Your investment horizon and risk tolerance

A higher interest rate should not automatically be interpreted as a better investment. In many cases, a higher yield may reflect higher credit or liquidity risk.

Debentures vs Bonds: Which Should You Choose?

There is no universal answer because the characteristics of a bond or debenture depend on the specific issue.

Instead of comparing the names alone, investors should compare:

• Credit quality of the issuer
• Coupon and yield
• Maturity
• Security
• Liquidity
• Tax treatment
• Redemption terms
• Overall risk

Understanding these factors provides a more meaningful comparison of debentures vs bonds.

Conclusion

Debentures are debt securities through which companies can raise funds from investors. Depending on their structure, they can be secured or unsecured, convertible or non-convertible, and may offer fixed or otherwise structured interest payments.

At the same time, investors should not look only at the interest rate. Credit quality, maturity, security, liquidity, taxation and the terms of the issue are equally important. A higher coupon can come with higher risk, so investors should evaluate the complete structure before investing.