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A zero-coupon bond is an investment in debt that does not pay interest but instead trades at a deep discount. The profit is realized at its maturity date when the bond is redeemed for its full face value.
A zero-coupon bond is also known as an accrual bond.
Some bonds are issued as zero-coupon instruments. Other bonds are transformed into zero-coupon instruments after a financial institution strips them of their coupons and repackages them as zero-coupon bonds.
Because they offer payment at face value at maturity, zero-coupon bonds tend to fluctuate in price on the secondary market much more than coupon bonds.
For a company or a government, a bond is a tool for borrowing money. Investors who purchase bonds are effectively acting as lenders to the issuing entity.
The investors earn a return in the form of coupon payments, which are made semiannually or annually, throughout the life of the bond.
When the bond matures, the bondholder is repaid an amount equal to the face value of the bond. The par or face value of a corporate bond is typically stated as $1,000.
If a corporate bond is issued at a discount, this means investors can purchase the bond below its par value. For example, an investor who purchases a bond for $920 at a discount will receive $1,000 when it reaches its maturity date. The $80 return plus coupon payments are the investor's earnings for holding the bond.
But not all bonds have coupon payments. Those that do not are referred to as zero-coupon bonds.
Zero-coupon bonds are issued at a deep discount and repay the par value at maturity. The difference between the purchase price and the par value represents the investor's return. The payment received by the investor is equal to the principal invested plus the interest earned, compounded semiannually, at a stated yield.
The interest earned on a zero-coupon bond is an imputed interest, meaning that it is an estimated interest rate for the bond and not an established interest rate. For example, a bond with a face value of $20,000 that matures in 20 years, with a 5.5% yield, may be purchased for roughly $6,855. At the end of the 20 years, the investor will receive $20,000.
The difference between $20,000 and $6,855 (or $13,145) represents the interest that compounds automatically until the bond matures. Imputed interest is sometimes referred to as "phantom interest."
The imputed interest on the bond is subject to federal income tax. Therefore, although no coupon payments are made on zero-coupon bonds until maturity, investors may still have to pay federal, state, and local income taxes on the imputed interest that accrues each year.
Purchasing a municipal zero-coupon bond, buying zero-coupon bonds in a tax-exempt account, or purchasing a corporate zero-coupon bond that has tax-exempt status are a few ways to avoid paying income taxes on these securities.
The price of a zero-coupon bond can be calculated as:
Price = M ÷ (1 + r) n
If an investor wishes to make a 6% return on a bond, with $25,000 par value, that is due to mature in three years, they will be willing to pay the following:
$25,000 / (1 + 0.06) 3 = $20,991.
If the debtor accepts this offer, the bond will be sold to the investor at $20,991 / $25,000 = 84% of the face value. Upon maturity, the investor gains $25,000 - $20,991 = $4,009, which translates to 6% interest per year.
The greater the length of time until the bond matures, the less the investor pays for it, and vice versa.
The maturity dates on zero-coupon bonds are usually long-term, with initial maturities of at least 10 years. These long-term maturity dates let investors plan for long-range goals, such as saving for a child’s college education. With the bond's deep discount, an investor can put up a small amount of money that grows over time.
Zero-coupon bonds can be issued from a variety of sources, including the U.S. Treasury, state and local government entities, and corporations.
Most zero-coupon bonds trade on the major exchanges.
Zero-coupon bonds, like other bonds, are subject to interest rate risk if investors sell them before maturity.
Payment of interest, or coupons, is the key difference between a zero-coupon and a regular bond.
Regular bonds, which are also called coupon bonds, pay interest over the life of the bond and then repay the principal at maturity.
A zero-coupon bond does not pay interest but instead trades at a deep discount, giving investors a profit at maturity when they redeem the bond for its full face value.
The main factor to consider is the imputed interest rate that the investor will earn at maturity.
The price of a zero-coupon bond can be calculated with the following equation:
Zero-coupon bond price = Maturity value ÷ (1 + required interest rate)^number years to maturity
Imputed interest, sometimes referred to as "phantom interest," is an estimated interest rate. The imputed interest on the bond is subject to income tax.
The IRS uses an accretive method when calculating the imputed interest on Treasury bonds and sets a minimum interest rate relative to imputed interest and the original price discount.
Zero-coupon bonds are an alternative to the better-known coupon bonds that pay regular interest to their investors. Zero-coupon bonds pay no interest but are purchased at a deep discount and repaid at full price.
Most zero-coupon bonds are long-term issues; 10 or more years is common. They are often used to finance a long-range goal, such as paying for a child's college education.
One big thing to consider: The owners of zero-coupon bonds pay a "phantom interest" tax on the bonds' earnings through the years they hold them.
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Related TermsA bond ladder is a portfolio of fixed-income securities with different maturity dates. Read how to use bond ladders to create steady cash flow.
A payment-in-kind bond is a type of bond that pays interest in additional bonds rather than in cash. PIK bonds are typically issued by companies facing financial distress.
A Treasury Bill, or T-bill, is a short-term debt obligation issued by the U.S. Treasury and backed by the U.S. government with a maturity of one year or less
Price value of a basis point (PVBP) is a measure used to describe how a basis point change in yield affects the price of a bond.
A war bond is is a form of government debt that seeks to raise capital from the public to fund war efforts.
Ba2/BB are ratings by Moody's Investor Service and S&P Global Ratings, respectively, for a credit issue or an issuer of credit below investment grade.
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