A coupon bond is a debt security that pays its holder a fixed amount of interest at regular intervals and returns the original principal when the bond matures. The word “coupon” comes from an era when bondholders clipped paper tabs from a physical certificate to collect each payment. The paper is gone, but the term stuck as the standard name for a bond’s periodic interest payment.
The Three Features Fixed at Issue
Every coupon bond carries three features locked in when it’s sold. The face value, also called par value, is the principal the issuer promises to repay at the end. The maturity date is when that repayment happens. The coupon rate is the fixed annual interest rate applied to the face value, and it sets how much cash the bondholder receives each year.
A coupon payment is the dollar amount of interest paid to the investor, calculated by multiplying the bond’s interest rate by its face value.1Investor.gov. Coupon Payment A $1,000 bond with a 5% coupon rate pays $50 a year in interest. Many bonds split that into two semiannual payments of $25. The rate itself never moves over the life of the bond. That predictability is why these instruments anchor most fixed-income portfolios: you know what you’ll be paid and when.
Where the Name Comes From
The original coupon bonds were paper certificates with small perforated tabs along the edge. Each tab carried a date and a dollar amount matching a scheduled payment. When the date arrived, the bondholder tore off the tab and presented it to a bank or paying agent for cash. Older investors still use “coupon clipping” as shorthand for collecting bond interest.
Those physical bonds were bearer instruments. Under longstanding commercial law, a promise to pay is “payable to bearer” when it indicates that whoever holds it is entitled to payment.2Legal Information Institute. UCC 3-109 Payable to Bearer or to Order3Congress.gov. HR 4961 – 97th Congress (1981-1982) Tax Equity and Fiscal Responsibility Act4Office of the Law Revision Counsel. 26 USC 163 – Interest
Today, ownership is tracked electronically through a book-entry system, with the Depository Trust Company handling clearing and settlement by adjusting records rather than moving paper.5DTCC. The Depository Trust Company – DTC The Treasury eventually dropped physical certificates for government securities altogether.6eCFR. 31 CFR Part 357 – Regulations Governing Book-Entry Treasury Bonds, Notes and Bills When someone today says they own a coupon bond, they mean a bond that pays periodic interest. The economics match what the paper promised a century ago; the mechanics are electronic.
What You Actually Earn: Price, Coupon Rate, and Yield
The coupon rate is fixed, but the bond’s market price moves constantly, and the two are inversely related. When market rates rise, the price of an existing bond with a lower coupon falls. When rates drop, the bond’s price rises. The coupon payments themselves don’t change regardless of what the market does.7Investor.gov. When Interest Rates Go Up, Prices of Fixed-Rate Bonds Fall
That produces three pricing scenarios. When the coupon rate matches the prevailing market rate, the bond trades at par. When market rates sit above the coupon rate, the bond sells at a discount to face value. When market rates fall below the coupon rate, investors pay a premium to lock in the higher fixed payments.
Current Yield
If you paid anything other than par, the coupon rate alone doesn’t tell you what you’re earning. Current yield fixes that by dividing the annual coupon payment by the bond’s current market price. A $1,000 bond paying $50 a year and trading at $950 has a current yield of about 5.26% ($50 รท $950), higher than the stated 5% coupon. The discount boosts the return. The reverse holds for premium bonds: current yield comes in below the coupon rate when you pay more than face value.
Yield to Maturity
Current yield still ignores what happens at the end. If you bought at a discount, you’ll gain when the issuer pays back the full face value. If you bought at a premium, you’ll absorb a loss. Yield to maturity folds that gain or loss in, along with the time value of all the remaining coupon payments, to give the most complete measure of expected return if you hold to maturity.7Investor.gov. When Interest Rates Go Up, Prices of Fixed-Rate Bonds Fall This is the number professionals focus on when comparing bonds.
Accrued Interest Between Coupon Dates
Bonds don’t just trade on payment dates. When a bond changes hands between coupons, the buyer owes the seller for the interest that has built up since the last payment. This is accrued interest, and it’s added to the purchase price at settlement.
FINRA rules set the convention: interest accrues on a 360-day year with each calendar month treated as 30 days, and accrued interest is added to the dollar price at settlement.8FINRA. FINRA Rule 11620 – Computation of Interest The IRS treats the mechanics similarly. If you buy between interest dates, the portion of the purchase price representing accrued interest is treated as a return of capital rather than interest income, reducing your cost basis. If you sell between dates, the accrued interest portion of the sale price counts as interest income in the year of sale.9Internal Revenue Service. Publication 550 (2025) Investment Income and Expenses
How Coupon Interest Is Taxed
Interest from coupon bonds is generally taxable as ordinary income in the year it becomes due and payable. For most investors, each coupon gets reported on the return for the year you were entitled to receive it, whether or not you actually cashed anything.9Internal Revenue Service. Publication 550 (2025) Investment Income and Expenses
Municipal bonds are the main exception. Interest from bonds issued by state and local governments is generally excluded from federal income tax under IRC Section 103(a).10Internal Revenue Service. Module B Introduction to Federal Taxation of Municipal Bonds The exclusion doesn’t reach every muni; certain private activity bonds, arbitrage bonds, and federally guaranteed bonds are taxable. For a standard general-obligation bond from your city or state, the interest is tax-free federally and often at the state level too.
Buy a coupon bond at a market discount, and the gain attributable to that discount is treated as ordinary interest income rather than capital gain when you sell or hold to maturity.9Internal Revenue Service. Publication 550 (2025) Investment Income and Expenses A small relief valve exists. The de minimis rule allows capital-gain treatment if the discount is less than 0.25% of face value for each full year remaining to maturity.11Internal Revenue Service. Publication 1212 (12/2025) Guide to Original Issue Discount (OID) Instruments On a 10-year bond, that threshold works out to 2.5% of face value, or $25 on a $1,000 bond. Discounts below that line get capital-gain treatment instead of ordinary income.
Coupon Bonds vs. Zero-Coupon Bonds
Zero-coupon bonds sit at the opposite end. They pay no interest during the bond’s life. Instead, they’re sold at a steep discount to face value, and the entire return comes from receiving the full face amount at maturity.12Investor.gov. Zero Coupon Bond A zero might cost $3,500 today and pay $10,000 in 20 years, with nothing in between.13FINRA. The One-Minute Guide to Zero Coupon Bonds
That structure eliminates reinvestment risk, because there are no coupons to redeploy. It also pushes all of the return to the end, which makes zeros far more sensitive to interest rate changes than coupon bonds of the same maturity. Zeros carry a tax wrinkle too. The IRS treats the difference between the purchase price and face value as original issue discount, a form of interest that accrues annually.11Internal Revenue Service. Publication 1212 (12/2025) Guide to Original Issue Discount (OID) Instruments You owe tax on that imputed interest each year even though no cash arrives until maturity.13FINRA. The One-Minute Guide to Zero Coupon Bonds That “phantom income” is why zeros tend to live inside retirement accounts, where the annual accrual doesn’t trigger a tax bill.
The Risks That Actually Matter
Interest rate risk comes first for most investors. When rates rise, the bond’s market price falls, and the longer the bond’s duration, the steeper the drop. For every one-percentage-point move in rates, a bond’s price shifts in the opposite direction by roughly its duration number; a bond with a duration of five years would lose about 5% if rates rose a point. A higher coupon shortens duration because more of the money comes back sooner; a lower coupon lengthens it.14FINRA. Brush Up on Bonds: Interest Rate Changes and Duration If you can hold to maturity, rate changes mostly affect what you can earn reinvesting each coupon payment.
Reinvestment risk is that reinvestment question in its own right. When a coupon arrives, you have to put the cash somewhere. If rates have fallen since you bought in, the best available reinvestment rate may be lower than your coupon, and over a long hold the compounding drag can pull your actual return below the yield-to-maturity you started with.
Credit risk is the chance the issuer doesn’t pay. If a company goes bankrupt or a municipality defaults, you may not receive your coupons or your principal. The range is enormous: a U.S. Treasury bond and a junk-rated corporate bond are both coupon bonds, but they sit at opposite ends of the credit spectrum. Understanding who is responsible for repayment and assessing their financial condition is the starting point for evaluating any bond’s credit risk.15SEC. Municipal Bonds Understanding Credit Risks Rating agencies offer letter grades to help, but those ratings are opinions, not guarantees, and they can change after you’ve already bought.