What it means
A bond has thousands of lenders rather than one bank, so negotiating individually with each of them is impossible. The indenture solves that by fixing one set of terms that every holder accepts on buying the bond, and by appointing a trustee to act for them collectively.
In the United States the document is often called a trust indenture, while other markets call it a trust deed or simply the terms and conditions of the notes. The commercial terms occupy only a few pages.
Principal amount, coupon rate, payment dates, maturity, ranking against other debt, any security over assets, and call provisions letting the issuer repay early are all set out plainly. Almost everything else in the document exists to protect the lenders between issue and repayment.
That protection comes through covenants. Affirmative covenants require the borrower to do things such as file audited accounts, maintain insurance and keep its assets in good order, while negative covenants restrict it from taking on more senior debt, selling core assets, paying large dividends or letting financial ratios drift beyond agreed limits.
The financial covenants are the ones tested numerically each quarter. Breaching a covenant triggers an event of default, and the indenture sets out exactly what follows.
There is usually a cure period, after which the trustee may accelerate the debt at the request of a specified majority of holders, meaning the whole principal becomes immediately repayable. In practice most issuers negotiate a waiver or an amendment before matters get that far, and they pay for the privilege.
The document is also where the amendment mechanics live. Changing the coupon, maturity or principal typically requires the consent of every holder or a very high majority, whereas administrative changes may need only a simple majority.
Investors read these thresholds carefully, because they determine how easily a distressed issuer can reshape their claim.
In practice
Real-world examples
Example 1
A mid-sized hotel group issues $200 million of ten year bonds. The indenture caps total debt at 4.0 times EBITDA and prevents the group from selling more than 20% of its properties without applying the proceeds to repay bonds. Both restrictions were negotiated down from the underwriter's opening draft.
Example 2
A retailer's earnings fall after a poor Christmas and its interest coverage drops below the 2.5 times minimum in the indenture. The trustee notifies holders, and the company negotiates a waiver in exchange for a higher coupon and a tighter restriction on dividends.
Example 3
An infrastructure issuer wants to call its bonds early and refinance at a lower rate. The indenture's call schedule allows redemption after year five at 102% of face value, so redeeming $150 million costs $153 million plus accrued interest. The treasurer weighs that premium against the interest saved over the remaining term.
Think of it
An indenture is like the rulebook for a shared house lease. It lays down clear boundaries, such as quiet hours and rent due dates, ensuring all roommates and the landlord know their exact rights and duties.
Formula
Calculation
Indentures are legal documents, but their financial covenants are pure arithmetic. A common one is the interest coverage ratio, where EBITDA means earnings before interest, tax, depreciation and amortisation:
Interest coverage ratio = EBITDA / Interest expense
A packaging company's indenture requires interest coverage of at least 3.0 times, tested quarterly on a rolling twelve month basis. Its EBITDA for the last twelve months is $24 million and its interest expense is $6 million.
Interest coverage ratio = $24m / $6m = 4.0 times
The company sits comfortably above the 3.0 times minimum. To find the headroom, work out the EBITDA at which the covenant would just be met: 3.0 x $6 million = $18 million. EBITDA can therefore fall by $6 million, or 25%, before the covenant is breached, and that percentage is the figure the treasurer reports to the board each quarter.Case study
Seen in the real world
Verrant Cold Chain is an illustrative, fictional refrigerated haulage business that raised $180 million through a bond issue to buy vehicles and depots. Its indenture contained a leverage covenant capping net debt at 3.5 times EBITDA, and a negative pledge preventing it from granting security to any new lender ahead of the bondholders.
Two years later a supermarket contract was lost, EBITDA fell from $60 million to $44 million, and leverage rose to 3.9 times. The company had already agreed a working capital facility with a bank that wanted security over its depots, which the negative pledge forbade, so it faced two breaches at once and had to go to bondholders for consent.
The illustrative outcome was a consent solicitation in which holders agreed to relax the leverage test to 4.25 times for four quarters, in exchange for a coupon increase of 0.75 percentage points and a suspension of dividends. The lesson is that covenants are rarely fatal on their own, but renegotiating them is always expensive and always happens at the worst possible moment.
Watch out
Common mistakes
- Assuming the trustee looks after individual bondholders' interests, when the trustee acts for the holders as a class and generally only on instruction from a specified majority.
- Reading only the coupon and maturity and skipping the covenants, which is where most of the risk and most of the negotiation actually sit.
- Believing a covenant breach automatically makes the debt repayable, when there is usually a cure period and acceleration requires holders to instruct the trustee.
Questions
People also ask
What is the difference between an indenture and a loan agreement?
An indenture governs a bond held by many investors and appoints a trustee, while a loan agreement is a direct contract with one lender or a small syndicate.
Who writes the indenture?
The issuer's lawyers draft it with the underwriters, and investors negotiate the covenant package before pricing, after which the terms are fixed for the life of the bond.
Can an indenture be changed after the bonds are issued?
Yes, through a consent solicitation, though core economic terms such as coupon and principal usually need near-unanimous approval.