How Conduit Financing Works With Tax-Exempt Bonds

Conduit financing with tax-exempt bonds is a borrowing structure that lets hospitals, universities, affordable housing developers, and other qualifying organizations tap the municipal bond market at interest rates well below conventional loans. A state or local governmental authority issues the bonds, but the private borrower actually receives the money and makes every payment. The government lends its status, not its balance sheet.

The Three Parties and How the Money Moves

Every conduit deal has an issuer, a borrower, and investors. The issuer is a governmental body with legal authority to sell tax-exempt bonds, typically a development authority, housing finance agency, or health facilities authority. The borrower is the private organization that will use the proceeds and repay the debt. The investors are the bondholders who buy the bonds and collect interest.

The money runs in a loop. The issuer sells bonds into the municipal market and lends the proceeds to the borrower under a loan agreement. The borrower’s debt service payments flow back through the issuer (or directly to a trustee) to the bondholders. The issuer sits in the middle as a legal conduit.

The tax exemption is what makes the structure worth setting up. Bondholders pay no federal income tax on the interest, so they accept a lower yield than they would demand on comparable taxable debt. That lower yield becomes the borrower’s lower interest rate. A hospital that might pay 6% on a conventional loan could pay closer to 4% through a conduit issue, depending on market conditions and credit quality.

Repayment risk sits entirely with the borrower. Conduit debt is structured as a limited obligation: the bonds are not backed by the issuer’s taxing power or general fund, and if the borrower defaults, bondholders have no claim against the government that issued the bonds.¹ Bondholders look only to the borrower’s revenues (patient fees, tuition, rents, tolls) and any collateral pledged in the loan documents. The borrower’s credit rating drives the bond’s pricing.

Which Door the Borrower Goes Through

Qualified 501(c)(3) Bonds

Organizations exempt from federal income tax under Section 501(c)(3), including nonprofit hospitals, private universities, and charitable organizations, borrow through qualified 501(c)(3) bonds. These bonds must satisfy IRC Section 145, which requires that all bond-financed property be owned by the 501(c)(3) organization or a governmental unit.²

A big practical advantage: qualified 501(c)(3) bonds are exempt from the state volume cap that constrains other private activity bonds.³ A nonprofit hospital is not competing against housing or industrial projects for scarce state bonding capacity. There is a separate $150 million per-beneficiary ceiling for non-hospital 501(c)(3) bonds, but bonds issued after August 5, 1997, are excluded when 95% or more of net proceeds finance post-1997 capital expenditures, so the cap rarely bites in practice.⁴

Private Activity Bonds for For-Profit Projects

Private activity bonds finance for-profit facilities that deliver a public benefit: airports, solid waste disposal facilities, water and sewer systems, affordable housing, and manufacturing facilities financed through industrial development bonds.

Most private activity bonds count against the state’s annual volume cap. For 2026, each state’s cap equals the greater of $135 multiplied by the state’s population or a floor of $397,625,000.³ States allocate this capacity among competing projects, and once it’s exhausted for the year, no more tax-exempt private activity bonds can be issued in that state. A borrower going down this path needs to secure a volume cap allocation early.

There is a pricing quirk worth knowing. Interest on most private activity bonds, other than 501(c)(3) bonds and a few other exceptions, counts as income for the Alternative Minimum Tax. That can push yields modestly higher than on comparable 501(c)(3) or general obligation debt.

The TEFRA Public Approval Step

Before a conduit bond can be issued, federal tax law requires public approval under a process created by the Tax Equity and Fiscal Responsibility Act of 1982. A private activity bond that skips the TEFRA hearing loses its tax-exempt status.⁵

Two approvals are needed. The issuing authority must hold a public hearing, and the governmental unit where the project is physically located must also approve if it differs from the issuer. Notice of the hearing must be published at least seven days in advance in a newspaper of general circulation or on the governmental entity’s website, and after the hearing an applicable elected representative must formally approve the issue. A voter referendum can substitute for the elected-official approval, but that route is uncommon for conduit deals.⁵

Federal Tests That Keep the Interest Tax-Exempt

Tax-exempt status is not a one-time achievement. It depends on continuous compliance, and a violation can retroactively make the interest taxable to investors from the date of issuance. Borrowers typically hire bond counsel to monitor these requirements for the life of the bonds.

Private Business Use

IRC Section 141 is the anchor. A bond issue tips into private activity bond territory when more than 10% of the proceeds are used for a private business purpose.⁶ For qualified 501(c)(3) bonds, the threshold is tighter: the 501(c)(3)’s own related activities count as governmental use, but use by other private parties or for unrelated business activities cannot exceed 5% of net proceeds.²

This is where real-world complications arise. A university hospital financed with 501(c)(3) bonds has to track space leased to a coffee shop or a physician practice, along with management contracts and naming-rights arrangements, because any of these can count as private business use if not structured carefully.

Private Security or Payment

The companion test asks whether debt service is secured by or derived from privately used property. An issue fails when more than 10% of principal and interest payments are tied to privately used property, or 5% for 501(c)(3) bonds.⁶ Both tests have to be met.

Land, Issuance Costs, and Maturity

A private activity bond fails if 25% or more of the net proceeds go to acquiring land. Farmland is treated more strictly: no bond proceeds can go to farmland, with a narrow first-time farmer exception.⁷

Issuance costs financed with bond proceeds (underwriter fees, legal expenses, rating agency charges) cannot exceed 2% of proceeds. Anything above that comes from the borrower’s own funds.⁷

The average maturity of the bonds cannot exceed 120% of the average reasonably expected economic life of the financed facilities.⁸ A building with a 40-year useful life could support bonds maturing in up to 48 years, but not 50.

Arbitrage and Rebate

Arbitrage rules stop issuers and borrowers from profiting by investing tax-exempt bond proceeds in higher-yielding taxable investments. Under IRC Section 148, bonds become “arbitrage bonds” and lose their tax-exempt status if proceeds are invested at a yield materially higher than the bond yield.⁹ “Materially higher” is defined precisely: for most investments, one-eighth of one percentage point above the bond yield.

Construction proceeds get a temporary period, generally up to three years, during which they can be invested without yield restriction, provided the issuer expects to spend at least 85% of proceeds within that window and makes binding commitments to spend at least 5% within six months. Reserve funds can earn unrestricted returns if they do not exceed 10% of the issue’s principal.

When proceeds do earn more than the bond yield, the excess generally must be rebated to the U.S. Treasury. The issuer files IRS Form 8038-T to make the payment, with a final rebate calculation when the bonds are retired. Spending exceptions can eliminate rebate entirely if proceeds are used quickly enough, which is why the timing of construction draws matters.

What Happens After Closing

The issuer must file IRS Form 8038 for private activity bonds within specific deadlines after closing, reporting the issue details, borrower identity, project description, and proceeds amount.¹⁰ A bond that fails the information reporting requirement under Section 149(e) loses its tax exemption outright.¹¹

The IRS expects issuers to adopt written post-issuance compliance procedures covering private use monitoring, arbitrage tracking, and record retention for the life of the bonds plus three years. The procedures should identify who is responsible, how often reviews happen, and what corrective steps follow a problem.¹²

Separately, SEC Rule 15c2-12 imposes continuing disclosure obligations. Annual financial statements and operating data must be filed with the Municipal Securities Rulemaking Board through EMMA. Material events, including payment delinquencies, rating changes, bankruptcy filings, adverse tax opinions, and unscheduled draws on reserves, must be reported within 10 business days.¹³ Missing these filings does not terminate the tax exemption, but a pattern of late or missed disclosures makes future bond sales more expensive or impossible, because underwriters review disclosure history before agreeing to participate.

The Real Cost of a Conduit Deal

A lower interest rate does not mean a cheaper transaction. Every conduit financing involves bond counsel (who delivers the tax opinion), underwriter’s counsel, issuer’s counsel, a financial advisor, a trustee, and a rating agency. On a smaller issue, these fees can eat into the interest savings meaningfully.

Most governmental issuers also charge an upfront application or closing fee plus an annual administrative fee based on outstanding principal. Annual administrative fees in the range of 0.10% to 0.35% of outstanding principal are common, though some authorities charge flat annual amounts for smaller issues.

The 2% cap on financed issuance costs means that on a $50 million issue, no more than $1 million in transaction costs can be paid from bond money. Anything above that comes out of the borrower’s own pocket. Building a realistic cost budget before committing to the process is the difference between a financing that saves money and one that does not.

Fixing a Compliance Violation

Violations happen. A university leases more space to a for-profit tenant than the private use test allows, or an issuer invests proceeds improperly. Losing the exemption is not automatic.

Treasury Regulations provide remedial actions that preserve tax-exempt status after a “deliberate action” changes the use of bond-financed property. The most common remedy is redeeming or defeasing the bonds allocable to the tainted property within 90 days of the deliberate action. Alternative remedies include using disposition proceeds from a sale to retire the affected bonds.¹⁴

For violations outside that framework, the IRS operates the Voluntary Closing Agreement Program for tax-exempt bonds. Through VCAP, an issuer can approach the IRS to resolve a known violation by negotiating a closing agreement, typically involving a payment to the Treasury and corrective steps.¹⁵ Self-correction almost always costs far less than a problem found on audit.

1
Governmental Accounting Standards Board. Summary – Statement No. 91
2
Office of the Law Revision Counsel. 26 U.S. Code 145 – Qualified 501(c)(3) Bond
3
Office of the Law Revision Counsel. 26 U.S. Code 146 – Volume Cap
4
Internal Revenue Service. Section 145 – Qualified 501(c)(3) Bonds
5
eCFR. 26 CFR 1.147(f)-1 – Public Approval of Private Activity Bonds
6
Office of the Law Revision Counsel. 26 U.S. Code 141 – Private Activity Bond; Qualified Bond
7
Office of the Law Revision Counsel. 26 U.S. Code 147 – Other Requirements Applicable to Certain Private Activity Bonds
8
Internal Revenue Service. Maturity Limitation for Certain Private Activity Bonds
9
eCFR. 26 CFR 1.148-2 – General Arbitrage Yield Restriction Rules
10
Office of the Law Revision Counsel. 26 U.S. Code 149 – Bonds Must Be Registered To Be Tax Exempt
11
Internal Revenue Service. About Form 8038, Information Return for Tax-Exempt Private Activity Bond Issues
12
Internal Revenue Service. TEB Post-Issuance Compliance: Some Basic Concepts
13
Municipal Securities Rulemaking Board. SEC Rule 15c2-12: Continuing Disclosure
14
Internal Revenue Service. Remedial Actions / Change in Use Rules
15
Internal Revenue Service. TEB Voluntary Closing Agreement Program