Federal LIHTC Rules vs State Housing Agency Rules: Who Controls What?
LIHTC is a federal tax-credit program administered largely through state and local housing credit agencies. That split is the reason two LIHTC properties can follow the same federal Section 42 rules while facing different application scoring, documentation, monitoring procedures, or long-term affordability requirements.
The simplest way to decide which source controls a question is to separate the federal floor from the state agency's administration. Section 42 and Treasury regulations establish the federal requirements a state cannot waive. The housing credit agency then uses its Qualified Allocation Plan, compliance procedures, and recorded agreements to allocate credits and administer additional requirements within that framework.
Section 42 Sets the Federal Floor
The Low-Income Housing Tax Credit exists under Section 42 of the Internal Revenue Code. Federal law controls the basic requirements that make a project and its units eligible for the federal credit.
Those federal rules include the minimum set-aside election. Depending on the project, the owner may use the 20-50 test, the 40-60 test, or the average income test. Under the average income test, designated unit income levels can range from 20% through 80% of area median gross income in specified increments, while the required average cannot exceed 60%.
There are statutory exceptions and special rules for certain projects, so a state manual should not be used as a substitute for the federal rule itself when determining what Section 42 requires.
The broader Low-Income Housing Tax Credit framework comes from federal law even though a state housing agency performs much of the day-to-day administration.
Federal Law Also Controls the Basic Rent Restriction
Section 42 defines when a low-income unit is rent-restricted. In general, gross rent cannot exceed 30% of the applicable imputed income limitation for the unit.
That is a federal LIHTC rule. A state agency cannot rewrite Section 42 to permit a rent that federal law prohibits and still treat the unit as federally compliant.
A property may nevertheless be subject to a lower rent ceiling because another funding source, the QAP, a regulatory agreement, or an extended-use commitment imposes a stricter restriction. In that case, complying with the federal maximum does not necessarily satisfy every restriction attached to the property.
The Federal Rules Govern the Credit Itself
Federal law and Treasury regulations control the federal tax-credit structure: qualified basis, applicable fraction, credit periods, applicable percentages, minimum set-aside requirements, rent restrictions, federal compliance consequences, and other conditions for claiming LIHTC.
The housing credit agency performs important calculations and determinations as part of allocation and underwriting, but it does not have authority to eliminate a federal statutory requirement.
This distinction also matters when comparing different financing routes. The 9% and 4% LIHTC financing structures operate through different allocation and financing paths, but both remain subject to Section 42.
The State QAP Decides Which Projects the Agency Wants to Prioritize
Federal law requires a housing credit agency that allocates LIHTC to operate under a Qualified Allocation Plan, commonly called a QAP.
Section 42 requires the QAP to contain specified selection criteria and preferences, but the plan is designed to reflect housing priorities appropriate to local conditions. That gives state agencies substantial influence over which developments compete successfully for limited credit authority.
A QAP may evaluate matters such as:
- project location;
- local housing needs;
- project characteristics;
- sponsor characteristics;
- special-needs populations;
- public housing waiting lists;
- families with children;
- energy efficiency;
- historic characteristics;
- and other state priorities allowed within the federal framework.
Federal law also requires specified preferences, including consideration of projects serving lower-income tenants and projects committed to qualified occupancy for longer periods.
Scoring Is Usually a State-Level Question
If the question is, “How many points will this development receive for deeper affordability, location, amenities, supportive housing, or another feature?” the controlling source is normally the current QAP and the agency's current application materials—not Section 42 alone.
One agency might assign substantial points to one policy objective while another uses different thresholds, scoring weights, set-asides, or tie-breakers.
That does not create 50 different federal LIHTC programs. It means one federal tax-credit program is allocated through housing agencies that can establish local priorities within federal boundaries.
A State QAP Can Be Stricter Than the Federal Minimum
Meeting Section 42 is not always enough to win an allocation or satisfy every commitment made to the housing credit agency.
A QAP can reward or require commitments that go beyond the minimum federal threshold. A project may agree to serve households at lower income levels, maintain affordability longer, satisfy additional design or policy standards, or meet other conditions in exchange for allocation, scoring advantages, or agency approval.
Once those commitments become part of an allocation, regulatory agreement, extended-use agreement, or other enforceable project document, the owner cannot assume that meeting only the federal minimum makes the property compliant with every applicable obligation.
But a State Manual Cannot Weaken Section 42
The hierarchy works in only one direction. A state can impose additional requirements where legally permitted, but it cannot declare that a project may ignore a federal Section 42 condition and still qualify for the federal credit.
If a state compliance manual appears to conflict with the Internal Revenue Code or controlling Treasury regulations, the manual should not be treated as authority to disregard federal law.
Often the apparent conflict is actually a difference between a federal minimum and a more restrictive state requirement. Those are not the same thing.
State Compliance Manuals Control Many Day-to-Day Procedures
After a property is placed in service, the housing credit agency has an ongoing compliance-monitoring role. Section 42 requires the QAP to include procedures for monitoring noncompliance and notifying the IRS when the agency becomes aware of noncompliance.
Federal regulations establish minimum monitoring requirements. State agencies then publish compliance manuals, forms, owner instructions, submission procedures, and other administrative guidance for projects in their portfolios.
A state compliance manual may address matters such as:
- how tenant files should be documented;
- which agency forms must be submitted;
- annual owner certifications;
- record-review procedures;
- physical inspection procedures;
- agency reporting deadlines;
- how owners respond to findings;
- and how the agency administers correction of identified noncompliance.
Those details can differ among agencies because the federal regulations establish required monitoring standards while allowing agencies to administer their own compliant procedures.
The Agency Monitors Compliance, but the Federal Tax Rule Remains Federal
This distinction is especially important when a state agency identifies a compliance problem.
The agency reviews the property, communicates findings to the owner, allows correction when the applicable rules permit it, and reports federal noncompliance to the IRS as required. The state agency is therefore the operational compliance monitor.
That does not turn every provision in the agency's compliance manual into a provision of the Internal Revenue Code. Some requirements implement federal law; others are agency procedures or additional state commitments.
Extended-Use Agreements Add Another Layer
For covered LIHTC buildings, federal law requires an extended low-income housing commitment between the owner and housing credit agency. The federal structure generally produces an extended-use period of at least 30 years: the 15-year compliance period followed by at least another 15 years of extended use, subject to the statutory rules governing the commitment.
The recorded agreement can last longer than that federal minimum. Section 42 defines the extended-use period by reference to the later of the federally required period or a later date specified by the housing credit agency.
As a result, a property can remain bound by affordability requirements after the federal 15-year credit compliance period ends.
State Law and the Recorded Agreement Can Be More Restrictive
The recorded extended-use agreement deserves separate attention because it can contain obligations that are not visible from a generic explanation of Section 42.
An agency may require longer affordability, deeper targeting, or other enforceable commitments when authorized by its program and applicable law. State law can also impose stricter requirements in areas where federal law permits them.
For a property-specific question about long-term restrictions, the correct source therefore may be the recorded extended-use agreement rather than a general LIHTC webpage or a current QAP written years after the property received its allocation.
The QAP and the Compliance Manual Do Different Jobs
These two state documents are often confused.
The QAP is primarily an allocation and policy document. It explains the agency's priorities, selection criteria, thresholds, preferences, underwriting requirements, and other conditions used in awarding or approving credits.
The compliance manual is primarily an operating and monitoring document. It explains how owners demonstrate ongoing compliance, maintain files, submit certifications, respond to monitoring, and follow agency procedures after the project is operating.
The documents can overlap, but neither should automatically be treated as a substitute for Section 42 or the property's recorded agreements.
Which Source Should You Check?
The answer depends on the question:
- Federal minimum set-aside: Section 42 and controlling Treasury/IRS guidance.
- Federal LIHTC rent restriction: Section 42 and applicable federal regulations.
- Credit calculation or federal qualification: the Internal Revenue Code, Treasury regulations, and current IRS guidance.
- State application points: the current QAP and application materials.
- State project-selection priorities: the current QAP.
- Owner reporting procedures: the housing credit agency's current compliance manual and forms.
- Agency monitoring procedures: federal monitoring rules plus the agency's QAP and compliance materials.
- Property-specific affordability term: the project's recorded extended-use or regulatory agreement.
- Requirements stricter than the federal minimum: the QAP, allocation documents, state law, and property-specific agreements, depending on the source of the restriction.
For Tenant Questions, the Property's Actual Restriction Still Matters
A tenant usually does not need to resolve every federal-state governance issue to determine eligibility for one apartment. The practical documents are the property's current income limits, rent limits, unit designation, tenant-selection materials, and any restrictions imposed by the agency or another funding source.
The LIHTC apartment eligibility and rent guide explains the tenant-facing federal framework, while the specific property's documents determine which additional restrictions apply to that apartment.
When two sources appear to give different answers, first identify whether one states the federal minimum and the other imposes a stricter state or property-specific commitment. That distinction usually reveals which rule is actually controlling the question.