A corporate bond is a loan you make to a company, and the company pays you back with interest

When you buy a corporate bond, you are lending money to a business for a set period — usually anywhere from a few years to 30 years. The company promises to pay you interest on that loan at regular intervals (often twice a year) and to return your full investment when the bond reaches its maturity date. Unlike a stock, which makes you a partial owner of the company, a bond is purely a debt agreement. The company owes you money, and you have a legal claim to that repayment before stockholders do.

Corporate bonds are issued by companies of all sizes — from established Fortune 500 firms to smaller businesses looking to fund expansion or refinance existing debt. The interest rate (called the coupon rate) depends on how risky the lender thinks the company is. A stable utility company might offer 4 percent interest, while a newer tech startup might have to offer 8 percent to attract investors, because there is a higher chance it could fail to repay.

Key Takeaways

  • A corporate bond is a debt security where you lend money to a company and receive regular interest payments plus your principal back at maturity.
  • The interest rate on a bond reflects the company's creditworthiness — riskier companies must offer higher rates to attract lenders.
  • Bonds are typically bought and sold on secondary markets, so you can sell before maturity if you need cash, though the price may be higher or lower than what you paid.
  • Credit rating agencies assign letter grades (AAA, BBB, CCC, and so on) to bonds based on the company's ability to repay, and these ratings directly affect the interest rate offered.
  • Corporate bonds carry three main risks: the company defaults and stops paying you, interest rates rise and your bond becomes worth less, or inflation erodes the purchasing power of your fixed payments.

How the interest rate is set and what it tells you

The coupon rate — the percentage of interest the company promises to pay you each year — is determined when the bond is first issued. It is based on several factors: the company's credit history, the length of the loan, current market interest rates, and the type of bond. A company with a strong track record of paying its debts can borrow at a lower rate. A company with a weaker financial position or one that has defaulted before has to offer a higher rate to convince people to lend to it.

The interest rate also reflects what is happening in the broader economy. When the Federal Reserve raises interest rates, newly issued corporate bonds come with higher coupon rates to stay competitive with other investments. If you own an older bond paying 3 percent and new bonds are paying 5 percent, your bond becomes less attractive — and if you want to sell it before maturity, you will have to accept a lower price to make up the difference.

Credit ratings and what they mean for your risk

Credit rating agencies — primarily Moody's, Standard & Poor's, and Fitch — assign letter grades to corporate bonds. These grades range from AAA (safest) down to D (in default). Bonds rated BBB or higher are called investment-grade, meaning they are considered relatively safe. Bonds rated BB and below are called high-yield or junk bonds, because they carry a higher risk that the company will not pay you back.

A rating of AAA means the agency believes the company is extremely unlikely to default. A rating of BB means the company is more vulnerable to economic downturns or industry changes. These ratings are not guarantees — they are opinions based on financial analysis — but they are widely used by investors to decide whether a bond is worth the risk. A company can also be downgraded if its financial situation worsens, which typically causes the bond's price to fall.

What happens when you buy and sell a bond

Most corporate bonds are not held until maturity. Instead, they trade on secondary markets where investors buy and sell them before the maturity date arrives. The price of a bond on the secondary market fluctuates based on interest rates, the company's credit rating, and overall demand. If interest rates fall after you buy a bond, your bond becomes more valuable because it pays a higher rate than newly issued bonds. If interest rates rise, your bond becomes less valuable.

When you sell a bond before maturity, you receive whatever price the market will pay for it — which could be more or less than you paid. If you hold it to maturity, the company will pay you the full face value (usually $1,000 per bond) regardless of what you paid for it on the secondary market. This is why bonds are sometimes described as less volatile than stocks: if you can afford to wait until maturity, you know exactly what you will receive.

The three main risks of owning corporate bonds

Default risk is the chance that the company will not pay you back. This is why credit ratings matter — a company rated CCC has a much higher default risk than one rated AAA. If a company files for bankruptcy, bondholders are paid before stockholders, but there is no may provide you will recover your full investment.

Interest rate risk occurs when market interest rates change after you buy the bond. If rates rise, the value of your bond falls because new bonds offer higher returns. If you need to sell before maturity, you will have to accept a lower price. Longer-term bonds are more sensitive to interest rate changes than shorter-term bonds.

Inflation risk is the erosion of your purchasing power over time. If you buy a bond paying 3 percent interest but inflation rises to 4 percent, you are losing money in real terms. This risk is especially significant for long-term bonds, because inflation can compound over decades.

Investment-grade versus high-yield bonds

Investment-grade bonds (rated BBB or higher) are issued by established companies with stable cash flows and strong balance sheets. They offer lower interest rates because the default risk is lower. A utility company or a large bank typically issues investment-grade bonds. These bonds appeal to conservative investors and institutions like pension funds that cannot afford to take large risks.

High-yield bonds (rated BB or lower) are issued by younger companies, companies in cyclical industries, or companies with higher debt levels. They offer much higher interest rates — sometimes 6, 8, or even 10 percent or more — to compensate for the higher risk of default. An investor in high-yield bonds is betting that the company will succeed and that the higher interest payments will outweigh the risk of losing the principal.

How corporate bonds fit into a broader investment strategy

Bonds are often used to balance the risk in a portfolio that also contains stocks. Stocks can be volatile in the short term, but bonds provide a more predictable stream of income. Many investors hold a mix of both, adjusting the proportion based on their age, risk tolerance, and time horizon. A younger investor might hold 20 percent bonds and 80 percent stocks. A retiree might hold 60 percent bonds and 40 percent stocks.

Corporate bonds also offer higher interest rates than government bonds or savings accounts, which is why they appeal to investors seeking income. However, that higher rate comes with higher risk. The trade-off between safety and return is central to bond investing: safer bonds pay less, riskier bonds pay more, and you have to decide which combination suits your situation.

Frequently Asked Questions

What is the difference between a corporate bond and a government bond?

A government bond is issued by a federal, state, or local government and backed by the government's ability to tax and print money. A corporate bond is issued by a company and backed only by that company's ability to generate cash and repay debt. Government bonds are generally considered safer, so they pay lower interest rates. Corporate bonds pay higher rates to compensate for the higher risk.

Can a bond's interest rate change after I buy it?

No, the coupon rate (the interest you receive) is fixed when the bond is issued and does not change. However, the market price of the bond changes based on interest rates and other factors. If you sell the bond before maturity, you may receive more or less than you paid depending on current market conditions.

What happens if a company defaults on its bond?

If a company defaults, it stops making interest payments and may not repay your principal. Bondholders can pursue legal action and have a claim on the company's assets ahead of stockholders, but recovery is not may provide. The amount you recover depends on how much the company is worth and how many other creditors are ahead of you in line.

How do I know if a bond is a good investment?

Look at the credit rating, the coupon rate, and the maturity date. Compare the interest rate to what other bonds of similar risk are offering. Consider whether you can afford to hold it to maturity or whether you might need to sell early. A bond is a good investment if the interest rate fairly compensates you for the risk you are taking.

Can I lose money on a bond if I hold it to maturity?

Only if the company defaults. If the company pays back as promised, you receive your full principal plus all interest payments, regardless of what happens to the bond's price on the secondary market. However, inflation can reduce the purchasing power of that repayment, which is a form of loss in real terms.