What Is a Debenture?

What Is a Debenture?

5 Min.

A debenture is a form of debt instrument not secured by any collateral and usually has a term greater than 10 years. The creditworthiness and reputation of the issuer are the only guarantees of a debenture. Both corporations and governments frequently issue debentures to raise capital or funds. Some debentures can be converted to equity shares, while others cannot.


Unsecured by collateral, a debenture functions as a bond or debt instrument. Issued by corporations and governments, it lacks collateral support, relying on the issuer's creditworthiness and reputation. Its purpose is to secure capital or funds.

Exploring Debentures

Debentures, akin to most bonds, offer periodic coupon payments. Documented within an indenture, a legally binding contract between issuers and holders, debentures outline crucial aspects like maturity date, interest payments, calculation methods, and other features. Governments issue long-term bonds over 10 years, considered low-risk due to government backing.

Corporations also utilize debentures as unsecured long-term loans, relying on financial viability and creditworthiness. These instruments feature fixed-date redemption, with interest payments preceding stock dividends. Debentures, advantageous with lower interest rates and extended repayment periods, are a preferred choice for companies compared to alternative loans.

Debenture Varieties

Registration Dynamics

Debentures assume two forms: registered and bearer. Registered debentures necessitate organized trading via a clearing facility for ownership changes, facilitating interest payments to the designated bondholder. In contrast, bearer debentures lack issuer registration, with interest entitlement bestowed upon the debenture holder.

Redemption Parameters

Debentures are further categorized as redeemable and irredeemable. Redeemable debentures stipulate repayment terms and a definitive date for full debt settlement. Irredeemable, or perpetual, debentures lack a fixed repayment obligation, perpetually outstanding.

Conversion Alternatives

Convertible debentures offer the flexibility of transforming into equity shares after a designated timeframe, presenting a hybrid of debt and equity benefits. While companies secure fixed-rate loans with fixed interest payments, debenture holders can opt for maturity and interest receipt or conversion to equity.

Investor Appeal and Trade-offs

Convertible debentures attract investors eyeing potential equity gains but at the expense of a reduced interest rate compared to fixed-rate alternatives. Nonconvertible debentures, lacking conversion privileges, compensate investors with higher interest rates than their convertible counterparts.

Debenture Characteristics

Before debenture issuance, an initial trust indenture, serving as an accord between the issuing entity and the trustee overseeing investor interests, is essential.

Interest Rate Determination

The coupon rate, which refers to the interest paid to debenture holders, can be fixed or floating. A floating rate may link to benchmarks like the 10-year Treasury bond yield, adjusting with benchmark fluctuations.

Impact of Credit Rating

The company's creditworthiness, reflected in the debenture's credit rating, influences investor interest rates. Credit-rating agencies, such as Standard and Poor's, utilize letter grades (AAA to D) to convey creditworthiness, with ratings below BB considered speculative, colloquially known as junk bonds.

Significance of Maturity Date

Nonconvertible debentures, previously discussed, hinge on a pivotal maturity date, dictating when the company must reimburse debenture holders. Repayment methods include lump-sum redemption from capital or periodic payments from a redemption reserve until full repayment at maturity.

Debentures: Advantages and Disadvantages

Debentures serve as prevalent long-term debt instruments issued by corporations to secure capital for expansion and operations. Investors benefit from consistent interest payments, offering a comparatively safer investment avenue than equity shares.

These unsecured bonds are issued to raise debt capital, lacking collateral and inherently carrying increased risk. Consequently, debentures compensate for this risk with higher interest rates, necessitating vigilant consideration of issuer creditworthiness by bond investors.

Despite the absence of collateral, not all debentures are riskier than other bonds. U.S. Treasury bonds and bills, both debentures, are considered risk-free despite lacking collateral.


  • Regular interest payments to investors.
  • Convertible debentures allow conversion to equity shares, enhancing investor appeal.
  • Priority payment in the event of corporate bankruptcy, preceding common stock shareholders.


  • Fixed-rate debentures may face interest rate risk in rising market interest rate environments.
  • Creditworthiness crucial in assessing default risk.
  • Inflationary risk if the coupon does not keep pace.

Debenture Risks: Inflation, Interest Rates, and Default

  • Inflationary Risk: Debenture holders face the risk of inflation affecting the interest rate, potentially leading to a net loss in real terms. For instance, if inflation rises by 3% and the debenture coupon pays only 2%, holders may experience decreased purchasing power.
  • Interest Rate Risk: Investors holding fixed-rate debentures during increasing market interest rates risk earning lower yields compared to alternative investments offering higher market rates.
  • Credit and Default Risk: Debentures are contingent on the financial strength of the issuer. Financial struggles, whether due to internal or macroeconomic factors, pose credit and default risks to investors. In case of bankruptcy, debenture holders are prioritized over common stock shareholders.

The key facets of a debenture encompass the interest rate, credit rating, and maturity date.

Illustration of a Government Debenture

A prime instance of a government debenture is the U.S. Treasury bond (T-bond), which is instrumental in funding diverse projects and sustaining daily governmental functions. The U.S. Treasury Department conducts auctions periodically to issue these bonds.

Certain Treasury bonds circulate in the secondary market, allowing investors to trade previously issued bonds through financial institutions or brokers. T-bonds, deemed almost risk-free, derive their security from the unwavering support of the U.S. government's full faith and credit. Despite this, they remain susceptible to inflation and fluctuations in interest rates.


Debentures, prevalent among corporations and governments, represent a widespread form of unsecured bonds. Unlike secured bonds, which enjoy collateral backing, the absence of such collateral renders debentures relatively riskier. In the event of default, they lack asset backstops and hinge solely on the issuer's creditworthiness. It is noteworthy that, strictly speaking, U.S. Treasury bonds align with the debenture category in this context.