Unamortized Bond Discount: Definition, Mechanism, and Impact

An unamortized bond discount is the difference between the par value of a bond and the proceeds received from the sale of the bond by the issuing company that has not yet been amortized over the bond’s life. It represents the portion of the bond discount that has not been allocated as an expense in the company’s income statement.

How It Works

When a bond is issued at a price below its par value, the difference is known as a bond discount. This discount is amortized over the life of the bond, matching the expense of the discount with the periods in which the interest expense is incurred. The unamortized portion of this discount is recorded as a debit balance in the discount on bonds payable account, which reduces the carrying amount of the bond on the balance sheet.

Types

There are various methods to amortize bond discounts:

• Straight-Line Method: The discount is divided evenly over the bond’s term.
• Effective Interest Method: The discount is amortized based on the bond’s carrying amount and the market interest rate. This method is generally preferred under Generally Accepted Accounting Principles (GAAP) as it follows the interest method of recognizing the cost.

Example

Suppose a company issues a $10,000 bond at $9,000. The $1,000 difference is the bond discount. If the bond has a ten-year maturity, an unamortized bond discount at the end of Year 1 using the straight-line method would be:

By the end of Year 1, the unamortized bond discount is:

Applicability

The unamortized bond discount impacts both the issuing company and investors. For the issuer, it affects the balance sheet, reducing the carrying amount of the bond liability. Investors may consider the unamortized discount when assessing the bond’s yield and overall profitability.

Comparisons

• Premium on Bonds: When bonds are sold above par value resulting in a premium.
• Par Value: The face value of a bond, to be repaid at maturity.
• Carrying Amount: The net value at which a bond is reported on the balance sheet, adjusted for any unamortized discount or premium.

FAQs

Q: Why is bond discount amortization necessary?

A: Amortization aligns the bond’s cost with the periods benefiting from the bond issuance, adhering to the matching principle in accounting.

Q: Can companies choose the method of amortization for bond discounts?

A: Yes, companies can choose between the straight-line method or the effective interest method, though GAAP prefers the latter.