What debt certificates are and why investors buy them

A debt certificate is a document that proves you have lent money to a borrower — usually a company or government — and that the borrower owes you that money back. When you buy a debt certificate, you are the lender. The borrower promises to pay you interest on top of the original amount and to return the full amount by a set date.

Investors buy debt certificates because they produce regular income. Unlike stocks, which may or may not pay dividends and whose value swings with company performance, a debt certificate comes with a fixed payment schedule. You know in advance how much interest you will receive and when you will get your money back — assuming the borrower does not default.

Debt certificates are also called bonds, notes, or debentures depending on who issues them, how long they last, and what backs them. The basic structure is the same: you give money now, the borrower pays you back over time with interest.

Key Takeaways

  • When you buy a debt certificate, you lend money to a company or government and receive regular interest payments until the certificate matures.
  • The borrower is legally obligated to repay the full amount on the maturity date, which can range from a few months to 30 years or more.
  • Debt certificates typically offer lower returns than stocks but come with less price volatility and a clearer repayment timeline.
  • The interest rate on a debt certificate depends on the borrower's creditworthiness, how long you wait for repayment, and current market conditions.
  • You can sell a debt certificate before it matures, but the price you receive depends on interest rate changes and the borrower's financial health.

How the repayment structure works

When you buy a debt certificate, the issuer sets a maturity date — the day they promise to pay back the full amount you lent. Maturity dates range from a few months to 30 years. Until that date arrives, the borrower pays you coupon payments, which is the interest owed on the certificate.

Most debt certificates pay interest twice a year, though some pay monthly or annually. The interest rate is usually fixed when you buy the certificate, so you know exactly what each payment will be. For example, if you buy a $1,000 certificate with a 5 percent annual coupon, you receive $50 per year, typically split into two $25 payments.

On the maturity date, the borrower sends you the final interest payment plus the full original amount. At that point, the certificate is retired and the loan ends. If you want to continue earning income from debt certificates, you must buy new ones.

Why interest rates vary between different debt certificates

Not all debt certificates pay the same interest rate. The rate depends on three main factors: the borrower's credit risk, the length of time until maturity, and the overall interest rate environment.

Credit risk is the chance the borrower will not pay you back. A large, stable company or a national government is considered low-risk, so their certificates pay lower interest. A smaller company with uncertain finances is higher-risk, so it must offer higher interest to attract investors. Rating agencies like Moody's and Standard & Poor's publish credit ratings that help investors assess this risk.

Longer maturity dates also mean higher interest rates. If you lock your money away for 30 years instead of 5 years, you face more uncertainty and inflation risk, so the borrower pays you more to compensate. A 2-year certificate from the same borrower typically pays less than a 10-year certificate.

Market interest rates also shift the rates on new certificates. When the Federal Reserve raises its benchmark rate, newly issued certificates pay higher interest to stay competitive. Older certificates you already own keep their original rate, but their market value may fall if new ones pay more.

The difference between buying and selling debt certificates

You can hold a debt certificate until maturity and collect all the promised payments, or you can sell it to another investor before maturity. The price you receive when selling depends on how much interest rates have changed and how the borrower's credit has shifted.

If interest rates have risen since you bought the certificate, new certificates pay more interest than yours does. To sell yours, you must offer a lower price to make up the difference — buyers will not pay full price for a certificate that pays below-market interest. The longer the time until maturity, the bigger the price drop, because the buyer is locked into low payments for longer.

If interest rates have fallen, the opposite happens. Your certificate now pays above-market interest, so you can sell it for more than you paid. Again, the effect is larger for longer-maturity certificates.

If the borrower's credit rating drops, the certificate's market value falls because investors worry about repayment. If the rating improves, the value rises. This is why debt certificate prices move even though the borrower's obligation to pay you back does not change.

Debt certificates versus stocks as investments

Debt certificates and stocks are both ways to invest money, but they work very differently. When you buy a stock, you own a small piece of the company. Your return depends on whether the company grows, whether it pays dividends, and whether other investors will pay more for the stock later. Stock prices can swing wildly, and you have no may provide of getting your money back.

With a debt certificate, you are a lender, not an owner. The company or government owes you a fixed amount of money and must pay it back on a set date. Your return is the interest rate, which does not change unless you sell before maturity. Debt certificates are generally less volatile than stocks because the repayment obligation is legal and comes before shareholder returns.

The trade-off is that debt certificates typically offer lower returns than stocks over long periods. Stocks have historically returned around 10 percent annually on average, while debt certificates usually return 3 to 6 percent depending on the borrower and maturity. You accept lower returns in exchange for more predictable income and lower risk.

Types of debt certificates and who issues them

Different borrowers issue different types of debt certificates. The U.S. government issues Treasury bills, notes, and bonds — these are considered the safest because they are backed by the full faith and credit of the federal government. Treasury bills mature in less than one year, notes mature in 2 to 10 years, and bonds mature in 20 to 30 years.

Corporations issue corporate bonds to raise money for operations, expansion, or acquisitions. These pay higher interest than Treasuries because companies are riskier than the government. Investment-grade corporate bonds are issued by stable, profitable companies. High-yield bonds, also called junk bonds, are issued by companies with weaker finances and pay much higher interest to compensate for the risk.

State and local governments issue municipal bonds to fund schools, roads, and other infrastructure. These often have tax advantages — the interest is usually exempt from federal income tax and sometimes from state and local tax too. This tax benefit allows municipalities to offer lower interest rates than corporations.

Some debt certificates are backed by specific assets. Mortgage-backed certificates are backed by home loans, and asset-backed certificates are backed by car loans, credit card debt, or other receivables. These are more complex and carry different risks than straightforward corporate or government bonds.

How to buy and hold debt certificates

You can buy debt certificates through a brokerage account, the same way you buy stocks. Major brokerages like Fidelity, Charles Schwab, and Vanguard all offer access to debt certificate markets. You can also buy Treasury securities directly from the U.S. government through TreasuryDirect.gov without paying a broker.

When you buy through a broker, you may pay a commission or spread — the difference between the price the broker paid and the price you pay. Treasury purchases through TreasuryDirect have no fees. Some brokers offer commission-free bond trading, so compare before you buy.

Once you own a debt certificate, you do not have to do anything. The borrower sends interest payments to your brokerage account on schedule, and you receive the full amount back on maturity. If you want to sell before maturity, you can do so through your broker, but you will receive whatever the market price is at that moment, which may be more or less than you paid.

Frequently Asked Questions

What happens if the borrower defaults on a debt certificate?

If the borrower stops paying interest or fails to repay the principal on the maturity date, you have a legal claim against them. For corporations, you may recover some money through bankruptcy proceedings, though you stand behind secured creditors. For government bonds, default is extremely rare — the U.S. government has never defaulted on its debt, though some countries have.

Can I lose money on a debt certificate?

If you hold the certificate until maturity and the borrower does not default, you get back exactly what you lent plus the promised interest. If you sell before maturity, you may receive less than you paid if interest rates have risen or the borrower's credit has weakened. You can also lose money if the borrower defaults.

How is the interest from debt certificates taxed?

Interest from corporate and Treasury bonds is taxed as ordinary income at your regular tax rate. Interest from municipal bonds is usually exempt from federal income tax and sometimes from state and local tax. If you sell a bond for more than you paid, the profit is taxed as a capital gain.

What is the difference between a bond and a note?

The terms are used loosely, but generally a note matures in 2 to 10 years and a bond matures in 20 years or longer. Both work the same way — you lend money, receive interest payments, and get the principal back at maturity. The distinction is mainly about how long your money is tied up.

Should I buy debt certificates or stocks?

That depends on your goals, timeline, and risk tolerance. Debt certificates are better if you want steady income, lower volatility, and a known repayment date. Stocks are better if you can tolerate price swings and want the potential for higher long-term returns. Many investors hold both to balance income and growth.