What Is a Debenture?

A debenture is a type of debt instrument unsecured by collateral. Since debentures have no collateral backing, debentures must rely on the creditworthiness and reputation of the issuer for support. Both corporations and governments frequently issue debentures to raise capital or funds.



Debentures Explained

Similar to most bonds, debentures may pay periodic interest payments called coupon payments. Like other types of bonds, debentures are documented in an indenture. An indenture is a legal and binding contract between bond issuers and bondholders. The contract specifies features of a debt offering, such as the maturity date, the timing of interest or coupon payments, the method of interest calculation, and other features. Corporations and governments can issue debentures.

Governments typically issue long-term bonds—those with maturities of longer than 10 years. Considered low-risk investments these government bonds have the backing of the government issuer.

Corporations also use debentures as long-term loans. However, debentures of corporations are unsecured. Instead, they have the backing of only the financial viability and creditworthiness of the underlying company. These debt instruments pay an interest rate and are redeemable or repayable on a fixed date. A company typically makes these scheduled debt interest payments before they pay stock dividends to shareholders. Debentures are advantageous for companies since they carry lower interest rates and longer repayment dates as compared to other types of loans and debt instruments.

Key Takeaways

  • A debenture is a type of debt instrument that is not secured by collateral and usually has a term greater than 10 years.
  • Debentures are backed only by the creditworthiness and reputation of the issuer.
  • Both corporations and governments frequently issue debentures to raise capital or funds.
  • Some debentures can convert to equity shares while others cannot.

Convertible and Nonconvertible Debentures

Convertible debentures are bonds that can convert into equity shares of the issuing corporation after a specific period. Convertible debentures are hybrid financial products with the benefits of both debt and equity. Companies use debentures as fixed-rate loans and pay fixed interest payments. However, the holders of the debenture have the option of holding the loan until maturity and receive the interest payments or convert the loan into equity shares.

Convertible debentures are attractive to investors that want to convert to equity if they believe the company's stock will rise in the long term. However, the ability to convert to equity comes at a price since convertible debentures pay a lower interest rate compared to other fixed-rate investments.

Nonconvertible debentures are traditional debentures that cannot be converted into equity of the issuing corporation. To compensate for the lack of convertibility investors are rewarded with a higher interest rate when compared to convertible debentures.

Features of a Debenture

When issuing a debenture, first a trust indenture must be drafted. The first trust is an agreement between the issuing corporation and the trustee that manages the interest of the investors.

Interest Rate

The coupon rate is determined, which is the rate of interest that the company will pay the debenture holder or investor. This coupon rate can be either fixed or floating. A floating rate might be tied to a benchmark such as the yield of the 10-year Treasury bond and will change as the benchmark changes.

Credit Rating

The company's credit rating and ultimately the debenture's credit rating impacts the interest rate that investors will receive. Credit-rating agencies measure the creditworthiness of corporate and government issues. These entities provide investors with an overview of the risks involved in investing in debt.

Credit rating agencies, such as Standard and Poor's, typically assign letter grades indicating the underlying creditworthiness. The Standard & Poor’s system uses a scale that ranges from AAA for excellent rating to the lowest rating of C and D. Any debt instrument receiving a rating of lower than a BB is said to be of speculative-grade. You may also hear these called junk bonds. It boils down to the underlying issuer being more likely to default on the debt.

Maturity Date

For nonconvertible debentures, mentioned above, the date of maturity is also an important feature. This date dictates when the company must pay back the debenture holders. The company has options on the form the repayment will take. Most often, it is as redemption from capital, where the issuer pays a lump sum amount on the maturity of the debt. Alternatively, the payment may use redemption reserve, where the company pays specific amounts each year until full repayment at the date of maturity.


  • A debenture pays a regular interest rate or coupon rate return to investors.

  • Convertible debentures can be converted to equity shares after a specified period, making them more appealing to investors.

  • In the event of a corporation's bankruptcy, the debenture is paid before common stock shareholders.


  • Fixed-rate debentures may have interest rate risk exposure in environments where the market interest rate is rising.

  • Creditworthiness is important when considering the chance of default risk from the underlying issuer's financial viability.

  • Debentures may have inflationary risk if the coupon paid does not keep up with the rate of inflation.

Debenture Risks to Investors

Debenture holders may face inflationary risk. Here, the risk is that the debt's interest rate paid may not keep up with the rate of inflation. Inflation measures economy-based price increases. As an example, say inflation causes prices to increase by 3%, should the debenture coupon pay at 2%, the holders may see a net loss, in real terms.

Debentures also carry interest rate risk. In this risk scenario, investors hold fixed-rate debts during times of rising market interest rates. These investors may find their debt returning less than what is available from other investments paying the current, higher, market rate. If this happens, the debenture holder earns a lower yield in comparison.

Further, debentures may carry credit risk and default risk. As stated earlier, debentures are only as secure as the underlying issuer's financial strength. If the company struggles financially due to internal or macroeconomic factors, investors are at risk of default on the debenture. As some consolation, a debenture holder would be repaid before common stock shareholders in the event of bankruptcy.

Real World Example of a Debenture

An example of a government debenture would be the U.S. Treasury bond (T-bond). T-bonds help finance projects and fund day-to-day governmental operations. The U.S. Treasury Department issues these bonds during auctions held throughout the year. Some Treasury bonds trade in the secondary market. In the secondary market through a financial institution or broker, investors can buy and sell previously issued bonds. T-bonds are nearly risk-free since they're backed by the full faith and credit of the U.S. government. However, they also face the risk of inflation and interest rates increases.