Hospital bonds work by letting a health system borrow money from investors through a government intermediary, use that money for major capital projects, and repay it over 20 to 30 years from operating revenue under a detailed set of legal and tax rules. A state or local authority issues the bonds in its own name on the hospital’s behalf, but the hospital alone stands behind the debt. The tax-exempt municipal market is the main channel nonprofit hospitals use, and nonprofit hospital and healthcare systems issued roughly $44.5 billion in bonds during 2024.
Who Actually Issues the Bonds
At its core, a hospital bond is like any other bond. Investors hand over money today for regular interest payments and the return of principal at maturity. What sets these bonds apart is the path the money travels.
Most nonprofit hospitals cannot issue tax-exempt bonds directly. A state or local governmental body acts as a conduit issuer. A state health facilities financing authority, for example, technically issues the bonds in its own name but on behalf of the hospital. The authority takes no financial responsibility for the debt. The hospital, called the “obligor,” bears the full repayment obligation. If the hospital cannot pay, bondholders have no claim against the government entity that issued the paper.1Municipal Securities Rulemaking Board. Municipal Bond Basics
This structure exists for one reason: it unlocks tax-exempt status for the bond interest, which lowers the hospital’s borrowing costs. Investors accept a lower interest rate because they keep more of each payment after taxes. The hospital gets cheaper financing, and the authority collects a small fee without taking on risk.
Tax-Exempt Versus Taxable
The single most important structural decision in a hospital bond deal is whether the interest will be tax-exempt or taxable. That choice drives the interest rate, the investor base, and the ongoing compliance burden.
Tax-Exempt Bonds
Under federal law, interest on bonds issued by state and local governments is generally excluded from the bondholder’s gross income.2Office of the Law Revision Counsel. a href=”https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title26-section103&num=0&edition=prelim” target=”_blank” rel=”noopener”>26 USC 103 Interest on State and Local Bonds For hospital bonds to qualify, they must meet the requirements for “qualified 501(c)(3) bonds.” All property financed by the bond proceeds must be owned by either a 501(c)(3) nonprofit or a governmental unit.3Office of the Law Revision Counsel. 26 US Code 145 Qualified 501(c)(3) Bond
The tax code also imposes a private business use test. For qualified 501(c)(3) bonds, no more than 5% of net bond proceeds can be used in an unrelated trade or business or by outside for-profit entities.3Office of the Law Revision Counsel. 26 US Code 145 Qualified 501(c)(3) Bond The general private activity bond limit for governmental bonds is 10%.4Office of the Law Revision Counsel. 26 USC 141 Private Activity Bond Qualified Bond A hospital that leases too much bond-financed space to a for-profit physician group, or that outsources too many services to private operators, can trip this limit and jeopardize the tax exemption.
The tax code caps total outstanding tax-exempt debt at $150 million for most 501(c)(3) borrowers, but hospital bonds are explicitly exempt from that ceiling.3Office of the Law Revision Counsel. 26 US Code 145 Qualified 501(c)(3) Bond A large health system can carry billions in outstanding tax-exempt hospital debt without hitting a statutory limit.
Taxable Bonds
When a hospital cannot satisfy the 501(c)(3) requirements, or when the borrower is a for-profit entity, the bonds must be issued as taxable debt. The interest is fully subject to federal income tax, so the hospital has to offer a higher rate to attract buyers. For-profit hospital chains routinely issue taxable corporate bonds for the same projects nonprofits finance through the tax-exempt market. The gap between tax-exempt and taxable rates can run 100 to 200 basis points, which on a $300 million issue means millions in additional interest expense over the life of the bonds.
What Actually Secures the Debt
Hospital bonds are revenue bonds. The investor’s only source of repayment is the hospital’s operating income. Unlike general obligation bonds backed by a government’s taxing power, hospital revenue bonds carry no taxpayer guarantee. That makes the legal protections written into the bond documents the real security package.
The Revenue Pledge
The foundation of bondholder security is the revenue pledge in the bond indenture, the contract governing the bonds. Most hospital bonds use a gross revenue pledge, which requires the hospital to direct all operating revenue toward debt repayment before paying operating expenses. Under a gross pledge, bondholders sit at the top of the payment waterfall. A net revenue pledge, less common, allows the hospital to cover operating costs first and pledges only what remains.
Rate Covenant
The indenture typically includes a rate covenant that obligates the hospital to set its fees and charges at levels high enough to cover both operating expenses and debt payments. It does not guarantee a specific revenue amount, but it gives bondholders a contractual tool to force rate increases if income drops below required thresholds.
Debt Service Coverage Ratio
Financial covenants almost always require the hospital to maintain a minimum debt service coverage ratio, or DSCR. This ratio measures how much operating income the hospital generates relative to its annual debt payments. A DSCR of 1.25 means the hospital earns $1.25 for every $1.00 owed to bondholders. Minimum DSCR covenants commonly fall in the 1.10 to 1.25 range. Falling below the covenant does not usually trigger immediate default, but it typically forces the hospital to hire an independent consultant to develop a corrective plan.
Debt Service Reserve Fund
Most hospital bond indentures require a debt service reserve fund, a cash cushion held by the bond trustee to cover payments if the hospital misses a scheduled payment. The reserve is a contractual protection negotiated into the bond documents, not a statutory requirement. The indenture spells out when the trustee can tap the reserve and how quickly the hospital must replenish it.1Municipal Securities Rulemaking Board. Municipal Bond Basics
The Bond Trustee
An independent trustee, usually a bank’s corporate trust department, sits between the hospital and the bondholders. The trustee holds bond proceeds, monitors covenant compliance, receives financial reports, and distributes interest and principal payments to investors.5GFOASC. The Role of the Trustee in Your Bond Financing If the hospital violates a covenant, the trustee has the authority to notify bondholders and, in serious cases, accelerate the debt so that the full principal balance becomes due immediately.
Ratings and Credit Enhancement
Before a hospital bond reaches investors, the major rating agencies evaluate the hospital’s ability to repay. The rating is the single biggest driver of the interest rate the hospital will pay. Rating agencies look at operating margins, cash reserves, debt load, competitive position, payer mix, and management quality. A system that leans heavily on Medicaid reimbursement in a competitive urban market will rate differently than a dominant regional provider with strong commercial insurance volume.
Most rated nonprofit hospital bonds fall in the A to BBB range. Higher-rated systems borrow at lower rates; hospitals that slip below investment grade face steeper costs and a smaller pool of willing investors. A downgrade after issuance does not change the fixed interest rate, but it reduces the bond’s market value and can trigger additional covenant requirements built into the indenture.
Some hospitals purchase bond insurance to improve their bonds’ credit profile. A bond insurer guarantees investors will receive all scheduled principal and interest even if the hospital cannot pay. The hospital pays a one-time premium at closing, typically funded from bond proceeds, and the bonds carry the higher of the hospital’s own rating or the insurer’s rating. That can lower the interest rate enough to more than offset the premium.
How a Hospital Bond Comes to Market
Bringing a hospital bond to market involves a team of specialists and a process that typically takes several months from start to closing.
The Financing Team
The hospital engages bond counsel, whose primary job is to issue a legal opinion confirming the bonds’ tax-exempt status.6Internal Revenue Service. IRC 145 Qualified 501(c)(3) Bonds An underwriter structures the offering, prices it, and sells it to investors. A financial advisor works on the hospital’s side of the table, helping negotiate terms and evaluate market conditions. The conduit issuer’s own counsel also participates.
The Official Statement
The hospital prepares an official statement, the municipal bond equivalent of a corporate prospectus. It describes the hospital’s finances, the project being funded, the bond structure, risk factors, and the legal security package. Investors rely on it to make their purchase decisions.7Municipal Securities Rulemaking Board. Primary and Continuing Disclosure Obligations
Pricing and Closing
The sale takes one of two forms. In a negotiated sale, the underwriter and hospital agree on pricing, and the underwriter sells the bonds to institutional and retail investors. In a competitive sale, multiple underwriting firms bid on the bonds and the lowest interest cost wins. Negotiated sales dominate hospital bond financings because the credit story often needs explanation. Once pricing is complete, investors wire funds to the trustee, who releases proceeds to the hospital for the financed project.
Calls and Refinancing
Most hospital bonds include an optional call provision that allows the hospital to redeem the bonds early after a stated period, commonly 10 years from issuance.8Investor.gov. Callable or Redeemable Bonds The hospital pays bondholders face value plus accrued interest and, in some cases, a small call premium. Calls give hospitals the flexibility to refinance if interest rates drop or credit improves.
When a hospital exercises its call right to issue new bonds at a lower rate, the transaction is a refunding. A current refunding occurs within 90 days of the call date. Advance refunding, where a hospital issues new bonds well before the old ones become callable and parks the proceeds in escrow, was once a popular strategy. The 2017 federal tax overhaul eliminated the ability to issue tax-exempt advance refunding bonds, so hospitals that want to lock in lower rates early now have to use taxable debt for the advance refunding portion.9Internal Revenue Service. Advance Refunding Bond Limitations Under Internal Revenue Code Section 149d
Ongoing Obligations After Closing
Selling the bonds is not the end of the hospital’s obligations. Maintaining tax-exempt status and satisfying securities regulations creates a compliance burden that lasts until every bond is retired.
Continuing Disclosure
Federal securities rules require hospitals that issue bonds through a public offering to file annual financial information and operating data with the MSRB’s EMMA system, the public repository for municipal bond disclosures.10Municipal Securities Rulemaking Board. Continuing Disclosure Hospitals must also file notices within 10 business days of certain material events, including payment delinquencies, rating changes, bankruptcy filings, and bond calls.11eCFR. 17 CFR 240.15c2-12 Municipal Securities Disclosure Failure to comply does not automatically trigger a default, but it can damage the hospital’s standing with investors and make future borrowing more expensive.
Arbitrage Rebate
Tax-exempt bond proceeds often sit in investment accounts before they are spent on construction or equipment. If those investments earn a yield higher than the bond’s own interest rate, the excess earnings are arbitrage. Federal law requires issuers to calculate the excess and rebate it to the U.S. Treasury in installments at least every five years, with a final payment due within 60 days after the last bond is redeemed. A spending exception exists for construction projects. If the hospital spends bond proceeds on schedule (at least 10% within six months, 45% within one year, 75% within 18 months, and 100% within two years), the rebate requirement does not apply.12Office of the Law Revision Counsel. 26 US Code 148 Arbitrage
Record Retention
The IRS expects hospitals and conduit issuers to keep detailed records for the life of the bonds, including bond transcripts, IRS information returns (Forms 8038 and related filings), investment records supporting arbitrage calculations, and documentation of how bond-financed property is used.13Internal Revenue Service. Tax Exempt Bond FAQs Regarding Record Retention Requirements Private use tracking matters most. A hospital that cannot demonstrate it stayed within the 5% limit years after issuance risks having the IRS retroactively declare the bonds taxable, which would trigger indemnification claims from bondholders.
What Default Looks Like
Hospital bond defaults are relatively uncommon, but they happen. A covenant violation, such as failing to meet the minimum DSCR, typically counts as an event of default under the indenture. The trustee’s first remedy in most cases is to require the hospital to engage a consultant who develops a corrective plan. If the hospital fails to cure the default, the trustee can accelerate the entire outstanding debt, making the full principal balance due immediately.
When a hospital enters bankruptcy, bondholders discover the real limits of their legal protections. Revenue pledges and reserve funds provide priority within the bond structure, but bankruptcy courts can restructure those claims. Recovery rates vary sharply depending on the hospital’s assets and competitive position.
Direct Placement as an Alternative
Not every hospital goes to the public bond market. Some health systems place their debt directly with a bank or an institutional investor such as an insurance company. A direct placement skips the full official statement, avoids the public disclosure and continuing compliance obligations that come with a public offering, and can close faster. The trade-off is typically a shorter maturity, variable or adjustable interest rates, and tighter covenants that give the lender more control. For smaller projects, or for hospitals that want to avoid the cost and complexity of a public sale, direct placement can be the more practical route.