A revenue bond is repaid primarily from a specific project's, facility's, or enterprise's revenues rather than a broad general tax pledge.
A revenue bond is a bond repaid primarily from a specific project’s, facility’s, or enterprise’s revenues rather than from an issuer’s broad general tax pledge. In municipal finance, common repayment sources include tolls, utility charges, airport fees, hospital revenues, lease payments, housing project revenues, and other dedicated cash flows.
The revenue-bond label changes the evidence an investor should review. A strong city name does not automatically mean the city has pledged all available taxes to the bond. The official statement and bond documents define the repayment source, flow of funds, reserve requirements, rate covenants, additional bonds tests, and remedies if revenues fall short.
Revenue bonds can finance essential public services, but they can also expose investors to project-specific demand, pricing, regulation, construction, operating, and liquidity risks. The bond’s yield should be compared with those risks, the maturity, call protection, tax treatment, and recent trading levels.
| Label | Typical pledged source | Main risk question |
|---|---|---|
| Municipal revenue bond | Specified public system, lease, enterprise, or project revenue | Is the pledge limited or supported by another source? |
| Utility revenue bond | Water, sewer, electric, or other utility charges | Can rates and demand support operations and debt service? |
| Hospital revenue bond | Hospital or health-system revenue | How resilient are volume, payer mix, margins, and liquidity? |
| Housing or public-housing authority bond | Mortgage, rent, subsidy, or program cash flow | Which authority, program, guarantee, or appropriation supports payment? |
| Industrial development or industrial revenue bond | Payments from a private conduit borrower | Does the public issuer have any payment obligation beyond the conduit structure? |
| Special assessment bond | Assessments on benefited properties | Are assessments collectible and sufficient under the legal lien structure? |
A sector label is only a starting point. The official statement determines the obligor, pledge, flow of funds, reserves, covenants, and remedies.
| Feature | Revenue Bond | General Obligation Bond |
|---|---|---|
| Primary repayment source | Specified project, system, lease, or enterprise revenue. | Issuer’s broad taxing power or full-faith-and-credit pledge, depending on the bond. |
| Main credit question | Are pledged revenues sufficient and legally available for debt service? | Is the issuer’s tax base, fiscal condition, and legal authority strong enough? |
| Evidence to review | Official statement, pledged revenue history, coverage, covenants, reserves, and continuing disclosures. | Official statement, budget, tax base, debt burden, pension pressure, legal limits, and continuing disclosures. |
| Example | Toll-road revenue bond or water-system revenue bond. | City general obligation bond for public infrastructure. |
| Check | Why it matters |
|---|---|
| Pledged revenue | Defines the cash flow available to pay principal and interest. |
| Debt-service coverage | Shows how much cushion exists between pledged revenues and required debt service. |
| Rate-setting authority | Determines whether the issuer can raise tolls, utility rates, rents, or fees. |
| Flow of funds | Shows payment priority among operating costs, senior debt, reserves, and subordinate debt. |
| Additional bonds test | Limits or allows future debt secured by the same revenues. |
| Reserve fund and liquidity | Provides cushion but does not eliminate credit risk. |
| Call and refunding terms | Can change expected holding-period return and reinvestment risk. |
| Tax status | Tax-exempt, taxable, and AMT-sensitive treatment can change after-tax yield. |
Suppose a water system reports $18 million of annual net revenue available for senior debt service and $12 million of annual senior debt service. Its simplified debt-service coverage ratio is:
$18 million / $12 million = 1.50x
Now assume net pledged revenue falls 10% while debt service remains $12 million:
$16.2 million / $12 million = 1.35x
The stressed ratio still exceeds 1.00x, but that fact alone does not establish adequate protection. An analyst should compare 1.35x with the bond’s rate covenant and additional-bonds test, check whether the calculation follows the indenture definition of net revenue, and review reserve balances, planned capital spending, customer concentration, rate-setting authority, and future debt service.
If the official statement defines coverage differently from this simplified calculation, the document definition controls the covenant analysis. A headline coverage ratio should never be used without checking its numerator, denominator, measurement period, and seniority level.