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Unamortized Bond Premium


An unamortized bond premium refers to the excess amount paid by an investor over a bond’s face value during its purchase, which hasn’t been amortized (allocated) during the bond’s life. This premium compensates the investor for the bond’s interest rate being lower than the prevailing market interest rate. As the bond approaches maturity, the premium is gradually amortized until it reaches zero.


The phonetic pronunciation of “Unamortized Bond Premium” would be:Unamortized: /ˌʌnəˈmɔrtaɪzd/Bond: /bɒnd/Premium: /ˈpriːmiəm/

Key Takeaways

  1. An Unamortized Bond Premium arises when a bond is issued at a price higher than its face value. In other words, investors are willing to pay a premium for the bond, generally because the bond offers a higher interest rate than the current market rates.
  2. The bond premium must be amortized over the life of the bond to reduce the carrying value of the bond and reflect the bond’s face value at maturity. This amortization process aligns bond interest expense with the actual cost of borrowing and appropriately recognizes the interest expense each period.
  3. Unamortized Bond Premium affects financial statements by gradually reducing the bond’s carrying value, which appears as a liability on the balance sheet. This process also lowers the bond’s interest expense reported on the income statement, as the premium is treated as a reduction in the cost of debt over time.


The Unamortized Bond Premium is an essential term in business and finance as it represents the outstanding portion of the bond premium that has not yet been amortized or written off against the issuer’s interest expenses. It is important because it directly impacts the issuer’s financial statements and income tax liability. This premium arises when a bond is sold at a higher price than its face value, meaning that the issuer received more money from investors than the bond’s actual worth. The unamortized bond premium account is gradually reduced over the life of the bond through a process called amortization, affecting both the issuer’s net interest expense and the bond’s effective interest rate. In summary, understanding and managing unamortized bond premiums is crucial for accurately assessing a company’s debt obligations, financial performance, and compliance with tax and accounting regulations.


Unamortized Bond Premium serves as a critical component in the overall financial management of bond investments, particularly for organizations and investors seeking to make informed decisions when allocating capital. At its core, it represents the portion of the premium or additional cost above the bond’s face value paid by an investor that has yet to be amortized, or spread out, over the bond’s remaining life. The purpose of calculating and tracking the unamortized bond premium is to systematically allocate the extra amount paid for the bond over its remaining life, ensuring that the interest expense reflected on financial statements is accurate. This practice enables investors to gradually earn premium income through the bond’s interest payments, subsequently reducing the cost basis of their investment. In essence, unamortized bond premium plays a vital role in supporting accurate and transparent financial reporting and decision-making processes. As the premium gradually amortizes over the bond’s life, reflecting the true cost of holding the bond for investors, it assists in mitigating potential tax liabilities and correctly assessing the bond’s financial performance. The unamortized bond premium is also useful in analyzing bonds’ effectiveness as part of a diversified investment portfolio, as it permits investors to compare the returns generated by different bonds over time. Furthermore, it supplies valuable information to regulatory bodies and other stakeholders in ascertaining the financial health and stability of institutions holding bonds, ultimately contributing to an efficient and well-functioning financial market.


An unamortized bond premium refers to the excess amount paid by an investor over a bond’s face value, which has not yet been written off or recognized as an expense over the bond’s life. The bond premium compensates the bondholder for a lower interest rate than the market rate. Here are three real-world examples: 1. Municipal Bonds: A city government issues municipal bonds with a face value of $1,000,000 at a fixed coupon rate of 4% to finance public infrastructure projects. However, due to high demand, investors buy these bonds at a premium, paying a total of $1,050,000. The $50,000 premium is the unamortized bond premium, which will be written off gradually over the bond’s life, reducing the interest expense for the city government. 2. Corporate Bonds: A large corporation issues bonds with a face value of $500,000, offering a 5% coupon rate to raise capital for business expansion. The market interest rate at that time is 4.5%, so investors are willing to pay more than the face value, purchasing them at a premium (e.g., for $520,000). The $20,000 excess above the face value represents the unamortized bond premium, and it will be written off over time, decreasing the company’s reported interest expenses. 3. U.S. Treasury Bonds: The U.S. government issues Treasury bonds to finance budget deficits and refinance maturing debt. In a scenario where current interest rates are low, the bonds may be issued with a lower coupon rate, such as 2%. As these bonds are considered low-risk investments, investors might purchase them above the face value (e.g., for a total of $1,010,000 instead of $1,000,000). The $10,000 premium above the face value is the unamortized bond premium, which will be amortized over the bond’s life and reduce the U.S. government’s interest expense.

Frequently Asked Questions(FAQ)

What is an Unamortized Bond Premium?
An Unamortized Bond Premium refers to the remaining amount of the bond premium that has not yet been amortized (written off) over the life of the bond. When a bond is issued at a premium, the issuer receives more than the face value of the bond. The difference between the issue price and the face value is called the bond premium. As time passes, the bond premium will be gradually amortized, reducing the book value of the bond until it equals the face value at maturity.
How is Unamortized Bond Premium recorded on financial statements?
Unamortized Bond Premium is recorded as a contra-liability account in the balance sheet. It is presented alongside the associated bond liability, effectively reducing the total bond liability. Over time, the unamortized bond premium will reduce, and the bond liability, net of the premium, will approach its face value.
Why do issuers amortize bond premiums?
Issuers amortize bond premiums to allocate the premium amount over the life of the bond systematically. This process aligns with the accrual accounting principle, where expenses and revenues are recognized when incurred or earned, not when cash is paid or received, matching the bond’s interest expense with the respective accounting periods.
What is the difference between an unamortized bond premium and a bond discount?
An Unamortized Bond Premium occurs when a bond is issued at a price higher than its face value, while a bond discount arises when a bond is issued at a price lower than its face value. The bond premium reduces the effective interest expense for the issuer, whereas the bond discount increases the effective interest expense.
How do you calculate and record the amortization of the bond premium?
You can amortize a bond premium using either the straight-line method or the effective interest method. Both methods reduce the unamortized bond premium over the bond’s life.- Straight-line method: This method evenly spreads the bond premium over the life of the bond. To calculate, divide the bond premium by the number of interest payment periods. The amortization amount is then recorded as a reduction in interest expenses.- Effective interest method: This method factors in the time value of money, making annual amortization amounts different for each accounting period. First, calculate the effective interest rate (yield to maturity) and then multiply it by the net carrying amount of the bond to find the total interest expense. Subtract the bond’s cash interest payment from the total interest expense to obtain the amortization amount, which is credited to the unamortized bond premium account.
How does unamortized bond premium impact bonds trading at a premium?
The unamortized bond premium affects the bond’s book value and recorded interest expense for the issuer. As the bond premium is amortized, the bond’s book value, net of the premium, moves closer to its face value. The reduction in the unamortized bond premium reduces the issuer’s interest expense over the life of the bond.

Related Finance Terms

  • Amortization Schedule
  • Bond Issuance
  • Effective Interest Method
  • Present Value of Cash Flows
  • Carrying Value of Bonds

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