Convertible Bonds: Accounting for Debt with Equity Conversion Features
Quick answer: Convertible bonds are debt instruments with an option to convert into equity. Under ASC 470-20 (US GAAP) and IAS 32/IFRS 9, you split the proceeds between the debt component and the equity conversion option at fair value.
What Are Convertible Bonds?
A convertible bond (or convertible note) is a debt instrument that gives the holder the right to convert the bond into a predetermined number of common shares. Companies issue convertibles to raise capital at lower interest rates than straight debt, since the conversion option adds value to the investor.
Key features include:
- Face value: The amount paid at maturity if not converted
- Coupon rate: Interest paid until conversion or maturity
- Conversion price: The price at which bonds convert to shares
- Maturity date: When the bond matures if not converted
Accounting Treatment
Under ASC 470-20 (US GAAP) and IAS 32 / IFRS 9 (IFRS), convertible bonds require bifurcation — the instrument is split into two components:
- Debt component: The present value of future cash flows (interest + principal), measured at amortized cost
- Equity component: The residual value of the conversion option (face value minus debt component fair value)
The equity component is recorded in shareholders' equity and is not remeasured.
Journal Entry Examples
At issuance (proceeds = $100,000, fair value of debt = $85,000, equity component = $15,000):
Dr Cash $100,000
Cr Bonds Payable $85,000
Cr Additional Paid-In Capital $15,000
Each period: Record interest expense using effective interest method on the debt component.
At conversion (if bonds converted to 5,000 shares at $17.50/share):
Dr Bonds Payable $85,000
Dr Additional Paid-In Capital $15,000
Cr Common Stock $50,000
Cr Additional Paid-In Capital $50,000
Disclosure Requirements
Companies must disclose the carrying amount of the debt component, the nature and terms of the conversion option, and the amount of equity component. Maturities of debt for the next five years must also be disclosed.
Key Takeaways
- Convertibles are split into debt and equity components at issuance
- The equity component = proceeds minus fair value of pure debt
- Interest expense is computed on the debt component using effective interest method
- Upon conversion, the carrying values transfer to equity accounts
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