IRS Form 8328 – IRS Forms, Instructions, Pubs 2026 – In the complex world of tax-exempt financing, managing private activity bond allocations efficiently is crucial for state and local governments. IRS Form 8328, titled “Carryforward Election of Unused Private Activity Bond Volume Cap,” allows issuing authorities to extend the use of their unused bond volume cap into future years. This form plays a vital role in optimizing bond issuances for qualified projects, ensuring that valuable allocations don’t go to waste. Whether you’re a government official, bond issuer, or financial advisor, understanding Form 8328 can help maximize funding for infrastructure, housing, and other essential developments. As of 2026, the rules remain grounded in Internal Revenue Code sections 146(f) and 142(k), with no major changes reported.
What Are Private Activity Bonds and the Volume Cap?
Private activity bonds (PABs) are tax-exempt bonds issued by or on behalf of state or local governments to finance projects that benefit private entities, such as airports, housing developments, or industrial facilities. However, the Internal Revenue Code imposes a “volume cap” under Section 146, limiting the annual amount of certain PABs that can be issued within each state. This cap is calculated based on state population and inflation adjustments, ensuring equitable distribution of tax-exempt financing opportunities.
The volume cap applies to specific types of qualified PABs, including exempt facility bonds, qualified mortgage bonds, qualified student loan bonds, and others. Not all PABs are subject to this limit—exceptions include qualified 501(c)(3) bonds, certain refunding bonds, and bonds for government-owned facilities like airports or environmental projects. If an issuer exceeds its allocated cap, the excess bonds may lose their tax-exempt status, potentially leading to costly repercussions.
Unused portions of the volume cap can be carried forward for up to three years, but only for designated purposes. This carryforward mechanism helps issuers plan for larger projects that span multiple years, such as qualified residential rental developments or solid waste disposal facilities.
Purpose of IRS Form 8328
The primary purpose of Form 8328 is to allow an issuing authority to elect to carry forward its unused private activity bond volume cap under Section 146(f). By filing this form, issuers can defer unused allocations to future calendar years, applying them to specific qualified purposes without counting against the new year’s cap.
Additionally, states can use Form 8328 to carry forward unused volume cap specifically for qualified public educational facility bonds under Section 142(k). This election ensures that bonds issued pursuant to the carryforward do not exceed the elected amount and remain tax-exempt, provided they meet all other requirements.
Eligible carryforward purposes under Section 146(f) include:
- Qualified student loan bonds
- Qualified mortgage bonds or mortgage credit certificates
- Qualified redevelopment bonds
- Various exempt facility bonds (e.g., for mass commuting, water furnishing, sewage facilities, solid waste disposal, residential rental projects, hazardous waste facilities, heating/cooling, high-speed intercity rail, environmental enhancements for hydroelectric facilities, qualified highway or surface freight transfer facilities, qualified broadband projects, qualified carbon dioxide capture facilities, qualified green building and sustainable design projects, and qualified public educational facilities)
- Enterprise zone facility bonds
- Tax-Exempt Economic Development Bonds for the District of Columbia Enterprise Zone
For Section 142(k), the carryforward is limited to qualified public educational facility bonds.
Who Needs to File Form 8328?
Form 8328 must be filed by the issuing authority responsible for private activity bonds, such as state or local government entities allocated volume cap. This includes:
- State agencies or local governments electing carryforward under Section 146(f)
- States specifically for qualified public educational facility bonds under Section 142(k)
The form must be signed by an authorized public official responsible for making the carryforward election. Private entities or individuals do not file this form; it’s exclusively for governmental issuers.
If your entity has unused volume cap from a prior year and plans to use it for a qualified purpose within the next three years, filing Form 8328 is essential to preserve that allocation.
When and How to File Form 8328?
Timing is critical for Form 8328. It must be filed by the earlier of:
- February 15 of the calendar year following the year in which the unused amount arises, or
- The date of issue of the bonds pursuant to the carryforward election.
Once submitted, the election is irrevocable, and carryforward amounts cannot be amended. If errors occur (e.g., mathematical or typographical), issuers cannot file an amended form but may submit a Voluntary Closing Agreement Program (VCAP) request to the IRS for correction.
To file:
- Download the latest version of Form 8328 from the IRS website (e.g., the August 2022 revision as of the last update).
- Complete Parts I and II for Section 146(f) elections, or Parts I and III for Section 142(k).
- Mail the signed form to: Department of the Treasury, Internal Revenue Service Center, Ogden, UT 84201.
There is no electronic filing option for this form. Extensions may be available under certain revenue procedures, such as Rev. Proc. 2005-30, which provides a six-month automatic extension under specific conditions.
Step-by-Step Instructions for Completing Form 8328
Filling out Form 8328 requires careful calculation of unused volume cap. Here’s a breakdown:
Part I: General Information
- Enter the calendar year for which the election is made.
- Provide the issuer’s or state’s name, EIN (Employer Identification Number), and address.
Part II: Unused Volume Cap and Carryforward Under Section 146(f)
- Line 1: Total volume cap for the year.
- Line 2: Subtract bonds issued during the year (excluding exceptions like qualified 501(c)(3) bonds or certain refundings).
- Line 3: Subtract volume cap exchanged for mortgage credit certificates.
- Line 4: Subtract volume cap allocated to private activity portions of governmental bonds (if exceeding $15 million nonqualified amount).
- Line 5: Resulting unused volume cap.
- Specify carryforward amounts for each eligible purpose (e.g., qualified mortgage bonds on Line 6a).
Part III: Unused Volume Cap and Carryforward Under Section 142(k)
- Compute unused cap for qualified public educational facility bonds and elect the carryforward amount.
Sign and date the form under penalties of perjury.
Important Considerations and Rules
- Bonds Not Counted in Volume Cap: Include exceptions like qualified veterans’ mortgage bonds, certain exempt facility bonds (e.g., 75% or 100% government-owned high-speed rail), and bonds from prior carryforwards.
- State-Specific Allocations: Volume cap is allocated per state law, and carryforwards must align with those rules.
- Three-Year Limit: Carryforwards expire after three years if unused.
- Paperwork Burden: The IRS estimates 3 hours and 1 minute for preparation and filing.
For complex scenarios, such as adjustments for inflation or special allocations (e.g., from past legislation like the Housing Tax Act of 2008), consult IRS publications or revenue procedures.
Common Mistakes to Avoid
- Filing after the deadline, which could invalidate the election.
- Incorrectly calculating unused cap by including exempt bonds.
- Attempting to amend the form post-filing—instead, use VCAP.
- Neglecting to specify carryforward purposes, leading to disallowed use.
Conclusion
IRS Form 8328 provides a strategic tool for managing private activity bond volume caps, enabling issuers to support long-term projects without losing allocations. By understanding its purpose, filing requirements, and rules, you can ensure compliance and optimize tax-exempt financing. For the most current guidance, always refer to official IRS resources, and consider consulting a tax professional for personalized advice. If you’re ready to file, download the form directly from the IRS website and act before the February 15 deadline.