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Serial bonds

Serial bonds are bonds issued so parts of the principal mature on different dates instead of one final date. In Financial Accounting I, you use them to track long-term liabilities and repayment schedules.

Last updated July 2026

What are serial bonds?

Serial bonds are a type of long-term debt where the issuer repays the principal in pieces over several maturity dates. Instead of owing the entire face value on one final date, the company, city, or public entity retires part of the bond issue at regular intervals.

In Financial Accounting I, that structure matters because each scheduled maturity changes the liability balance on the books. When one portion matures, the issuer removes that amount from bonds payable and pays cash to the bondholders. The remaining balance stays on the balance sheet until the next maturity date.

This is different from a term bond, where the whole principal comes due at once. With serial bonds, the repayment burden is spread out, so the issuer does not need to save up for one giant balloon payment. That makes serial bonds easier to manage for projects with long useful lives, like municipal buildings, water systems, or utility upgrades.

You will usually see serial bonds organized by maturity year or date, with each slice of the issue having its own repayment schedule. Some maturities may carry different interest rates, because longer time periods generally mean more risk for investors. The issue is still one bond offering, but the principal does not all disappear at the same time.

A quick example makes the pattern clearer. Suppose a city issues $500,000 in serial bonds with $100,000 maturing each year for five years. At each maturity, the city pays back that year’s $100,000 principal, records the reduction in the liability, and keeps only the unpaid balance on the books. By the end of year five, the entire issue is retired.

The common mistake is mixing up serial bonds with bond interest payments. Interest is usually paid periodically on the outstanding principal, but the serial feature refers to principal repayment, not the coupon payment schedule.

Why serial bonds matter in Financial Accounting I

Serial bonds show up in Financial Accounting I because they connect the pricing of long-term liabilities to how debt is actually repaid over time. If you only think about one big maturity date, you miss how the liability balance changes as payments are made. Serial bonds force you to follow the debt schedule, not just the original issuance amount.

They also give you a cleaner way to read financial statements and bond schedules. On a balance sheet, the current portion of long-term debt may grow as each maturity gets closer, while the long-term portion shrinks. That breakdown helps explain why a bond issue can affect cash flow and solvency differently from one with a single maturity date.

This term also connects to how issuers plan financing for large projects. Municipal governments and public utilities often use serial bonds because the repayment pattern can match project revenue or tax collections. In class, that often shows up in word problems where you track the face value, maturity dates, and the liability that remains after each payment.

If you can read a serial bond schedule, you can usually handle the related accounting moves more confidently: principal retirement, liability reduction, and the timing of cash payments. That makes the term a useful bridge between the theory of long-term debt and the practical mechanics of accounting records.

How serial bonds connect across the course

Term Bonds

Term bonds are the closest comparison because they mature on one date instead of in installments. When you see both terms together, the question is usually about how the repayment schedule changes the issuer’s cash planning and the bond liability on the balance sheet. Serial bonds spread out principal retirement, while term bonds concentrate it at the end.

Discount on bonds payable

A serial bond can be issued at a discount if the market rate is higher than the stated rate. In Financial Accounting I, that means the company records a liability amount below face value and then amortizes the discount over time. The serial structure affects when principal is repaid, but the discount still has to be allocated to interest expense properly.

amortization

Amortization is the process of spreading a cost or discount over accounting periods. With serial bonds, you may need to follow amortization alongside the changing principal balance, since each maturity reduces the amount on which future interest is calculated. That is why bond schedules often combine principal retirement with interest expense calculations.

Municipal Bonds

Serial bonds are commonly used in municipal bond issues, especially for roads, schools, and utilities. The public issuer often prefers staggered maturities because tax revenue or project revenue arrives over many years. In accounting problems, this connection helps you recognize why a municipality might choose serial debt instead of a single large maturity.

Are serial bonds on the Financial Accounting I exam?

A quiz question may give you a bond schedule and ask which portion matures each year, or how much liability remains after one maturity date. You might also have to compare serial bonds with term bonds, identify whether the principal is repaid in installments, or record the cash and liability effects of a maturity payment. In a problem set, the big move is tracing the outstanding face value year by year, then matching that schedule to the balance sheet presentation. If the question mentions municipalities or public utilities, that is often a clue that staggered maturities are part of the financing plan.

Serial bonds vs Term Bonds

Serial bonds and term bonds are often confused because both are long-term debt. The difference is the maturity pattern: serial bonds mature in parts over time, while term bonds all come due on one date. If a question asks about staggered principal repayment, you are dealing with serial bonds.

Key things to remember about serial bonds

  • Serial bonds are bonds whose principal matures in installments instead of all at once.

  • In Financial Accounting I, the main accounting idea is that the bond liability decreases each time a maturity is paid.

  • The bond interest payment schedule is separate from the principal repayment schedule.

  • Serial bonds are often used by municipalities and public utilities because they spread out cash repayment needs.

  • A quick way to identify them is to look for multiple maturity dates in the bond issue.

Frequently asked questions about serial bonds

What is serial bonds in Financial Accounting I?

Serial bonds are a debt issue with staggered principal maturities, so part of the issue is repaid at regular dates instead of one final date. In Financial Accounting I, you use them to track how long-term liabilities shrink over time as each maturity is paid.

How are serial bonds different from term bonds?

Serial bonds mature in pieces over several dates, while term bonds mature all at once on a single date. That difference changes how the issuer plans cash flow and how you show the remaining liability on the balance sheet.

Are serial bonds the same as bond interest payments?

No. Interest payments are usually made periodically on the outstanding principal, but serial bonds refer to how the principal is repaid. The key accounting task is to separate the interest expense from the actual retirement of principal.

Why do municipalities issue serial bonds?

Municipalities often use serial bonds because the repayment schedule can match expected revenue, like taxes or utility income, over several years. That makes it easier to manage large public projects without facing one huge maturity date.

Serial Bonds | Financial Accounting I | Fiveable