A bond agreement is the legally binding contract between an issuer that borrows money and the bondholders who lend it, setting out every term of the loan: the principal amount, the interest rate, the payment schedule, the maturity date, and the remedies bondholders have if the issuer fails to pay. In the corporate bond world the same document is usually called an indenture. The Trust Indenture Act of 1939 defines an indenture broadly as any mortgage, deed of trust, or similar agreement under which securities are outstanding or will be issued.1GovInfo. 15 USC 77ccc – Trust Indenture Act Definitions In practice, a trustee holds the master contract on behalf of all bondholders, and each investor’s bond is evidence of the debt owed under it.2Securities and Exchange Commission. Investor Bulletin – Corporate Bonds
What the Agreement Promises to Pay
A handful of financial terms sit at the center of every bond agreement, and they determine what the bondholder earns and when.
The principal, also called face value or par value, is the amount the issuer promises to return at maturity. A bond’s market price can drift above or below par as interest rates change, but the principal is the fixed number owed on the final day.3Investor.gov. Bonds
The coupon rate is the interest the issuer pays on that principal. A fixed-rate bond locks the rate in for the life of the bond. A $10,000 bond with a 5% coupon pays $500 a year, typically split into two $250 payments six months apart. Some bonds pay a variable rate that adjusts periodically against a benchmark.4Municipal Securities Rulemaking Board. Interest Payments
The maturity date is when the issuer must return the full principal. Maturities run anywhere from a few months to 30 years or more. The agreement also pins down the payment schedule, naming the exact dates interest is due. Most bonds pay semi-annually on fixed dates.
Covenants and Events of Default
Covenants are the promises the issuer makes to protect bondholders, and they’re where a bond agreement gets its teeth. Affirmative covenants require the issuer to do specific things: maintain adequate insurance, deliver audited financial statements, and keep certain financial ratios above agreed thresholds. Negative covenants are restrictions, barring the issuer from taking on too much additional debt, selling off major assets, or paying oversized dividends. The SEC notes that bond indentures commonly include covenants limiting additional debt and requiring the issuer to maintain certain financial ratios.2Securities and Exchange Commission. Investor Bulletin – Corporate Bonds
The agreement also defines what counts as a default and what happens next. A missed interest payment is the most obvious trigger, but covenant violations qualify too. Most agreements include a cure period, giving the issuer a window to fix the problem before it escalates into a formal event of default. If the issuer doesn’t cure in time, the trustee can invoke remedies on behalf of bondholders. The most powerful is acceleration, which makes the entire principal balance due immediately rather than at maturity. The existence of that remedy on paper is often enough to keep issuers in compliance.
Who the Parties Are
The issuer is the entity borrowing money: a corporation, a city, a state agency, or the federal government. Its core obligation is simple to state: make every interest payment on time and return the principal at maturity. The bondholder is the lender. Buying the bond gives the bondholder a legal right to those payments, and the agreement is the document that makes those rights enforceable.3Investor.gov. Bonds
A trustee sits between them as a watchdog, usually a bank or trust company. The Trust Indenture Act requires that at least one trustee be a corporation authorized to exercise corporate trust powers and subject to federal or state regulatory oversight.5GovInfo. Trust Indenture Act of 1939 The trustee monitors compliance, receives financial reports, and steps in on behalf of bondholders if the issuer defaults.2Securities and Exchange Commission. Investor Bulletin – Corporate Bonds
Two administrative roles keep the bond running after issuance. The paying agent handles the actual distribution of interest and principal payments on the issuer’s behalf. The registrar maintains the official record of who owns the bonds, updating ownership when bonds change hands so the right people receive future payments. Often the same institution serves as both.
Secured and Unsecured Bonds
Whether the agreement is backed by collateral changes the deal significantly. Secured bonds are backed by specific assets the issuer pledges: real estate, equipment, receivables, or other property. If the issuer defaults, bondholders can claim and sell that collateral to recover their investment. Because the risk is lower, secured bonds generally carry lower interest rates.
Unsecured bonds, commonly called debentures, rely entirely on the issuer’s general creditworthiness. There’s no specific asset a bondholder can seize if things go wrong, and in a default debenture holders stand in line behind secured creditors. The tradeoff is a higher coupon to compensate for the added risk. A well-drafted agreement states clearly whether collateral is pledged and, if so, exactly what assets are involved.
Call Provisions and Sinking Funds
Many bond agreements let the issuer retire the bond before maturity, which matters because it can cut short the income stream the bondholder was counting on.
Optional call provisions let the issuer buy back bonds at a set price, usually only after a specified date. Many municipal bonds, for example, become callable 10 years after issuance. The call price is typically at or slightly above face value. Some bonds include make-whole call provisions, which require the issuer to pay a lump sum calculated to compensate bondholders for the future interest they’ll miss.6FINRA. Callable Bonds – Your Issuer May Come Calling
A sinking fund provision works differently. It requires the issuer to retire a portion of the bond issue on a regular schedule, usually annually, like a mandatory amortization built into the terms. The bonds that get retired are typically selected at random, so individual holders don’t know in advance whether theirs will be called in a given year. The upside for remaining bondholders is reduced credit risk, since the outstanding debt shrinks steadily over time.
Where Bondholders Stand in Bankruptcy
One of the most important questions a bond agreement answers, sometimes implicitly, is where the bondholder stands if the issuer goes under. The federal bankruptcy code sets a strict priority ladder for claims against a bankrupt entity.7Office of the Law Revision Counsel. 11 USC 507 – Priorities
Secured bondholders are in the strongest position. Their claim is backed by specific collateral, so they can look to those assets for repayment even before the priority ladder comes into play. Unsecured bondholders are general creditors. Under the bankruptcy code, they stand behind domestic support obligations, administrative expenses, employee wages (up to a capped amount per person), and tax claims owed to government entities, among others. In practice, unsecured bondholders often recover only a fraction of what they invested.
The distinction between senior and subordinated bonds matters here too. A senior bond agreement will specify that the bondholder’s claim ranks ahead of junior or subordinated debt. If remaining assets can’t cover everyone, subordinated bondholders may recover nothing. The hierarchy should be clearly spelled out in the agreement, and it’s one of the first things sophisticated investors check before buying.
Changing the Terms After Issuance
Bond agreements aren’t frozen, but changing the core terms is deliberately difficult. Most indentures distinguish between minor administrative changes, which the issuer and trustee can handle without bondholder input, and fundamental changes to the “sacred rights” of the bond: the principal amount, the coupon rate, and the maturity date. Modifying those terms in the United States traditionally requires unanimous consent of all bondholders. Some newer indentures have experimented with lower thresholds like 90% approval, but that remains controversial and far from standard practice. The high bar exists for a reason: it prevents an issuer from teaming up with a bare majority to strip value from minority bondholders.
The Rules Behind the Document
Bond agreements don’t exist in a regulatory vacuum. In general, securities offered to the public in the United States must be registered with the SEC or qualify for an exemption. The registration filing includes a description of the issuer’s business, details about the security being offered, management information, and certified financial statements. Common exemptions include private placements, offerings of limited size, and securities issued by government entities.8Investor.gov. Registration Under the Securities Act of 1933
For publicly offered corporate bonds, the Trust Indenture Act adds another layer. It prohibits the sale of debt securities in a public offering unless they’re issued under a qualified indenture with an independent trustee. The institutional trustee must be a regulated corporation with at least $150,000 in combined capital and surplus, and it must be free of conflicts of interest with the issuer.5GovInfo. Trust Indenture Act of 1939 Municipal bonds and certain other securities exempt from the Securities Act are not subject to the Trust Indenture Act, so the trustee requirement and other federal protections built into that statute won’t apply to them.