What Is a Bond Coupon? How Coupon Payments Are Calculated

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A bond coupon is the fixed interest payment a bond issuer makes to the bondholder, set as a percentage of the bond’s face value (par value). That percentage is the coupon rate. A $1,000 bond with a 5% coupon pays $50 of interest a year, usually split into scheduled installments, from the issue date until the bond matures and the face value is repaid.

How Coupon Payments Are Calculated

Three terms define a coupon:

1. Face value: the principal the issuer repays at maturity, commonly $1,000 per bond for corporate issues.
2. Coupon rate: the annual interest rate stated when the bond is issued.
3. Payment frequency: how many times a year interest is paid. U.S. Treasury notes and bonds pay twice a year. Other bonds may pay annually, quarterly or monthly, as set in their terms.

The formulas:

• Annual coupon = face value × coupon rate
• Coupon per payment = annual coupon ÷ payments per year

Each payment falls on a coupon date stated in the bond’s terms. The last one, the final coupon, is paid at maturity together with the return of face value.

Worked example (hypothetical)

A company issues a 10-year bond with a $1,000 face value and a 6% coupon, paid semiannually.

• Annual coupon: $1,000 × 6% = $60
• Each payment: $60 ÷ 2 = $30, every six months
• Total coupons over 10 years: 20 payments × $30 = $600
• At maturity: the final $30 coupon plus the $1,000 face value

This holds whether the investor bought the bond at issue for $1,000 or later on the secondary market for $940 or $1,060. The coupon is fixed in dollars because it is tied to face value.

Coupon Rate vs. Yield

The coupon rate (also called the nominal yield) tells you how much interest the bond pays. Yield tells you what return that interest represents at the price you paid.

• Coupon rate = annual coupon ÷ face value
• Current yield = annual coupon ÷ current market price

Using the example above, the bond pays $60 a year. If its price falls to $900, the current yield becomes $60 ÷ $900 ≈ 6.67%, while the coupon rate stays at 6%. If the price rises to $1,100, the current yield drops to about 5.45%. Only at a price of exactly par do the coupon rate and current yield match.

Current yield ignores the gain or loss you take when a bond bought below or above par is repaid at face value. Yield to maturity accounts for that, along with the timing of every remaining coupon, which makes it the more complete measure for comparing bonds.

How Market Interest Rates Affect Coupons

Issuers set the coupon rate based on prevailing interest rates and their own credit standing when the bond is sold. After issue, rates keep moving but the coupon on a fixed-rate bond does not. Instead, the bond’s price adjusts:

• If market rates rise above the coupon, newly issued bonds pay more, so existing bonds trade below par.
• If market rates fall below the coupon, the older bond’s higher payments become more valuable, and it trades above par.

A higher coupon also returns more cash earlier in the bond’s life. That tends to make its price somewhat less sensitive to rate changes than a lower-coupon bond of the same maturity, and it gives the holder more income to reinvest when rates rise.

Who Pays the Coupon

The issuer pays it: the U.S. Treasury for Treasury notes and bonds, a state or local government for municipal bonds, or a company for corporate bonds. Payments go to whoever holds the bond on the record date, typically through a broker or custodian.

When a bond changes hands between coupon dates, the buyer usually pays the seller accrued interest, meaning the portion of the next coupon earned while the seller held the bond. The buyer then receives the full coupon on the payment date.

Where the Term “Coupon” Comes From

Bonds were once printed certificates with detachable paper coupons that the holder clipped and presented to collect interest. These unregistered bearer bonds belonged to whoever held the paper, so a lost certificate usually could not be recovered and the anonymity appealed to tax evaders. The U.S. Tax Equity and Fiscal Responsibility Act of 1982 sharply curtailed their issuance. Ownership is now recorded electronically, but the word “coupon” stayed.

Types of Coupon Structures

• Fixed-rate coupon: the same rate for the life of the bond, as in the examples above.
• Floating-rate coupon: the rate resets periodically based on a benchmark rate plus a set spread, so payments change over time.
• Zero-coupon bond: no periodic interest. The bond is bought below face value, and the return is the difference at maturity.
• Municipal bond coupon: works the same way mechanically, but interest from municipal bonds is generally exempt from federal income tax. A lower muni coupon can therefore compete with a higher taxable coupon.

Limitations of the Coupon

The coupon tells you the cash a bond is scheduled to pay, not the return you will earn. Your return depends on the purchase price, how long you hold the bond, the rates at which you reinvest coupons, and whether you sell before maturity at a gain or loss. Fixed coupons also lose purchasing power when inflation runs high. Finally, the coupon is a promise: if the issuer defaults, payments can be missed, and callable bonds can be redeemed early, ending the coupon stream before maturity.

FAQs

The Bottom Line

Bond investors use the coupon to know exactly what cash a bond is scheduled to pay. Return depends on purchase price, holding period, reinvestment rates, inflation and issuer credit, so yield to maturity is the better measure for comparing bonds. Callable bonds and defaults can also cut the coupon stream short.