Qualified 501(c)(3) Bonds: Rules, Limits, and Compliance

Qualified 501(c)(3) bonds are tax-exempt bonds that a state or local government authority issues on behalf of a 501(c)(3) nonprofit, letting the organization finance buildings and other capital projects at interest rates well below what a conventional loan would cost. The savings come from the federal tax code: because bondholders don’t pay federal income tax on the interest they earn, they accept a lower yield, and that lower yield passes through to the nonprofit as cheaper debt. Hospitals, universities, community centers, and similar charitable organizations use these bonds to fund the physical assets that support their mission.

How the Structure Works

Under Internal Revenue Code Section 103, interest on state and local bonds is generally excluded from gross income for federal tax purposes.¹ Qualified 501(c)(3) bonds sit inside a subcategory of private activity bonds that keep this tax exemption even though the borrower is a private nonprofit rather than a government entity.

Three parties are involved. A conduit issuer, usually a state or local finance authority, lends its governmental status to the transaction. The nonprofit borrower is responsible for repaying the bonds. Bondholders purchase the debt. The conduit issuer carries no financial risk; it’s a legal wrapper that makes the tax exemption available.

One structural advantage matters more than most nonprofits realize going in. Most private activity bonds compete for scarce state allocation under IRC Section 146’s volume cap, but 501(c)(3) bonds are excluded from that cap.² A qualifying deal can be issued regardless of how much private activity bond capacity the state has already used.

Who Can Borrow

IRC Section 145 defines a qualified 501(c)(3) bond as a private activity bond where all property financed by net proceeds is owned by a 501(c)(3) organization or a governmental unit, and where the bond would not be treated as a private activity bond if the nonprofit’s exempt activities were treated as governmental functions.³ In practice: the borrower must be a recognized 501(c)(3), and the financed property must be used almost entirely for exempt purposes.

The nonprofit must hold a current IRS determination letter confirming its tax-exempt status, and that status must remain in effect for as long as the bonds are outstanding.⁴ If the organization loses its exemption while bonds are outstanding, the interest can become retroactively taxable to investors, which would likely accelerate the entire debt. Churches and certain other automatically exempt organizations may technically qualify without a determination letter, but bond counsel almost universally requires one before issuing a clean legal opinion.

What Proceeds Can Pay For

Bond proceeds fund capital projects that advance the nonprofit’s exempt mission. Common uses include acquiring land, constructing new facilities, and performing major renovations, including hospital wings, dormitory buildings, research labs, and community recreation centers. The financed property must be owned by the 501(c)(3) or a governmental unit.³ Proceeds cannot pay for general working capital, day-to-day operating expenses, or routine maintenance.

Federal law caps the portion of proceeds that can pay issuance costs, which includes legal fees, underwriting commissions, financial advisor fees, rating agency charges, printing, and public hearing costs, at 2% of the issue’s proceeds.⁵ Anything above the cap has to come from the nonprofit’s own funds or another taxable source. Issuance costs paid from bond proceeds also count against the 5% private business use limit, so there’s a practical reason to keep them low.

The 5% Private Business Use Limit

No more than 5% of the net proceeds of a 501(c)(3) bond issue can be used for any private business purpose.⁶ The statute takes the standard 10% private business use threshold for private activity bonds and cuts it in half.³

Private business use isn’t just leasing space to a for-profit tenant. It also includes the nonprofit’s own activities that constitute unrelated trade or business under IRC Section 513. If a university runs a commercial bookstore selling merchandise unrelated to its educational mission from part of a bond-financed building, that square footage counts toward the 5% cap. The tracking obligation runs every year until the last bond is redeemed.

Management Contract Safe Harbors

Hiring a third-party firm to manage bond-financed property can create private business use if the contract isn’t structured carefully. Revenue Procedure 2017-13 provides safe harbor conditions that keep a management contract from being treated as private business use.⁷ The core requirements:

The manager’s compensation must be reasonable and cannot be based on the property’s net profits or losses. Fixed fees, per-unit fees, and incentive fees tied to specific performance metrics are acceptable.
The contract term, including all renewal options, cannot exceed 30 years or 80% of the weighted average expected useful life of the managed property, whichever is shorter.
The nonprofit must approve annual budgets, capital expenditures, property dispositions, rates charged for use of the facility, and the general nature and type of use.
The nonprofit, not the manager, must bear the financial risk if the property is damaged or destroyed.
No more than 20% of the nonprofit’s governing body can be composed of the service provider’s directors, officers, or employees, and the provider’s CEO cannot also serve as the nonprofit’s CEO.

Contracts outside these safe harbors aren’t automatic violations, but they require a facts-and-circumstances analysis most bond counsel prefer to avoid.

How Long the Bonds Can Run

The average maturity of a 501(c)(3) bond issue cannot exceed 120% of the average reasonably expected economic life of the financed facilities.⁸ A building expected to last 40 years supports bonds with an average maturity of up to 48 years. Land is generally excluded from the economic life calculation unless 25% or more of the net proceeds are used to purchase land, in which case land is assigned a 30-year life.

Arbitrage and Yield Restrictions

Bond proceeds sit in an account earning investment income until the nonprofit spends them. If that investment income exceeds the yield on the bonds themselves, the organization has earned arbitrage, and the IRS wants the excess back. Under IRC Section 148, bond proceeds generally cannot be invested at a yield materially higher than the bond yield, and any excess earnings must be rebated to the U.S. Treasury.⁹

Rebate isn’t a one-time event. Installment payments are due at least once every five years, with each installment covering at least 90% of the rebate calculated as of that date. A final payment is due within 60 days after the last bond is redeemed.

Temporary Period Exceptions

Federal regulations grant a grace period during which proceeds can be invested at higher yields without triggering arbitrage restrictions. For capital projects, the temporary period is three years from the issue date, provided the issuer reasonably expects to spend at least 85% of net sale proceeds within that window, enters a binding commitment to spend at least 5% within six months, and proceeds with due diligence.¹⁰ Projects with substantial construction can qualify for a five-year temporary period if both the issuer and a licensed architect or engineer certify the longer timeline is needed. Once the temporary period ends, unspent proceeds must be invested at or below the bond yield.

Getting the Deal Done

Bringing an issue to market starts with a conduit issuer. The nonprofit identifies a state or local authority willing to serve in that role, typically an industrial development authority, health facilities authority, or general-purpose finance authority. Fees vary. Application fees commonly range from $1,000 to $25,000, and initial issuance fees are typically set as a percentage of the bond amount, often between 2.5 and 150 basis points depending on the issuer and deal size. Some issuers charge ongoing annual fees.

Before bonds can be issued, the financing must receive public approval under IRC Section 147(f). Practitioners call this the TEFRA hearing, after the Tax Equity and Fiscal Responsibility Act of 1982. Reasonable public notice must go out at least seven calendar days before the hearing, stating the time, place, a description of the project, the maximum principal amount of bonds, and the project’s location.¹¹ The hearing itself lets interested individuals express views on the proposal. Afterward, an applicable elected representative, meaning the chief elected executive, the elected legislative body, or a designated elected official, must provide written approval.

The issuer must file IRS Form 8038 (Information Return for Tax-Exempt Private Activity Bond Issues), which reports the bond amount, property description, principal users, and weighted average maturity.¹² The filing is due by the 15th day of the second calendar month after the close of the quarter in which the bonds were issued.¹³

Bank-Qualified Designation for Smaller Issues

Nonprofits with smaller borrowing needs can access even lower rates through the bank-qualified or qualified tax-exempt obligation designation under IRC Section 265(b)(3). The designation lets banks that purchase the bonds deduct 80% of the carrying cost of the investment, which makes the bonds more attractive and typically lowers the interest rate. To qualify, the issuer cannot reasonably anticipate issuing more than $10 million in tax-exempt obligations during the calendar year.¹⁴ Qualified 501(c)(3) bonds are explicitly eligible; they aren’t treated as private activity bonds for purposes of this rule.

For a small nonprofit financing a $5 million building, the designation can shave an additional 15 to 40 basis points off the interest rate compared to a non-bank-qualified tax-exempt bond.

Refunding Existing Bonds

Nonprofits sometimes want to refinance outstanding bonds for lower rates, restructured debt, or released covenants. Federal law distinguishes two types of refunding.

In a current refunding, the old bonds are redeemed within 90 days of issuing the new bonds. Current refundings remain permitted and are the standard method for refinancing tax-exempt debt.
In an advance refunding, the new bonds are issued more than 90 days before the old bonds are redeemed, with proceeds held in escrow until the call date. The Tax Cuts and Jobs Act of 2017 eliminated the authority to issue tax-exempt advance refunding bonds for any bonds issued after December 31, 2017.¹⁵

Some organizations have turned to taxable advance refundings as a workaround, issuing taxable bonds now to defease the old tax-exempt bonds and then refinancing into new tax-exempt bonds when the old ones become callable. The economics only work when the rate spread justifies two transactions.

Fixing Compliance Problems

Mistakes happen. A nonprofit might lease too much bond-financed space to a for-profit tenant, miss an arbitrage rebate payment, or let a management contract drift outside safe harbor terms. Two paths lead back to compliance.

Remedial Actions

When a deliberate action such as a new lease or sale to a private party pushes an issue past the 5% private business use limit, Treasury regulations allow the issuer to take remedial action rather than accept taxability of the entire issue.¹⁶ The main options:

Redeem the affected portion of bonds within 90 days of the deliberate action, or establish a defeasance escrow within the same window.
If the disposition generates cash, spend those proceeds within two years on a use that doesn’t create private business use.
Transfer the facility to another 501(c)(3) organization or governmental unit. The affected bonds are treated as reissued and must satisfy all requirements for the remainder of their term.

These remedies are only available if the issuer had reasonable expectations at the time the bonds were issued that private business use limits would be met.

Voluntary Closing Agreement Program

For violations that can’t be fixed through remedial actions, or that involve arbitrage or spending failures rather than private business use, the IRS offers the Tax Exempt Bonds Voluntary Closing Agreement Program (VCAP). Issuers and borrowers can disclose violations and negotiate a closing agreement that preserves tax-exempt status in exchange for a settlement payment or corrective action.¹⁷ Coming forward voluntarily almost always produces a better outcome than waiting for the IRS to find the problem during an examination. The program accepts anonymous submissions during the initial inquiry phase, so organizations can explore options before identifying themselves.

Ongoing Compliance After Closing

Closing day is the start of the compliance obligation, not the end. For the life of the bonds, often 20 to 30 years, the nonprofit needs to track:

Every lease, license, management contract, and change of use affecting bond-financed property, measured against the 5% private business use limit.
Investment earnings on unspent proceeds, with excess earnings rebated to the Treasury on the required schedule.
When and how bond proceeds were spent, to demonstrate compliance with temporary period and spending requirements.
The organization’s 501(c)(3) status, which must remain in effect throughout the life of the bonds. Losing that status can retroactively destroy the tax exemption on all outstanding bonds.

Most organizations assign post-issuance compliance to a specific staff member or outside consultant and adopt written procedures. Bond counsel and auditors increasingly expect those procedures to be in place, and the IRS has made post-issuance compliance a focus of its tax-exempt bond examination program.

1
Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds
2
Office of the Law Revision Counsel. 26 U.S. Code 146 – Volume Cap
3
Office of the Law Revision Counsel. 26 U.S. Code 145 – Qualified 501(c)(3) Bond
4
Internal Revenue Service. href=”https://www.irs.gov/pub/irs-tege/teb1-lesson12.pdf” target=”_blank” rel=”noopener”>Section 145 – Qualified 501(c)(3) Bonds
5
Internal Revenue Service. Excess Costs of Issuance for Private Activity Bonds
6
Internal Revenue Service. Qualified 501(c)(3) Bonds
7
Internal Revenue Service. Revenue Procedure 2017-13
8
Office of the Law Revision Counsel. 26 U.S. Code 147 – Other Requirements Applicable to Certain Private Activity Bonds
9
Office of the Law Revision Counsel. 26 U.S. Code 148 – Arbitrage
10
eCFR. 26 CFR 1.148-2 – General Arbitrage Yield Restriction Rules
11
eCFR. 26 CFR 1.147(f)-1 – Public Approval of Private Activity Bonds
12
Internal Revenue Service. About Form 8038, Information Return for Tax-Exempt Private Activity Bond Issues
13
Internal Revenue Service. Instructions for Form 8038 (Rev. September 2025)
14
Internal Revenue Service. Lesson 13 Bank Qualified Bonds – Section 265
15
Internal Revenue Service. Advance Refunding Bond Limitations Under Internal Revenue Code Section 149(d)
16
Internal Revenue Service. Remedial Actions / Change in Use Rules
17
Internal Revenue Service. TEB Voluntary Closing Agreement Program