• The LIHTC is the primary federal tool for incentivizing private investment in rental housing affordable to lower‑income households. Created in the Tax Reform Act of 1986, it gives state housing agencies authority to award federal tax credits to developers who agree to rent a share of units at restricted rents to households below area median income (AMI). For each dollar of credit awarded, a dollar of federal income tax liability may be offset by the investor that claims the credit. (Congressional Research Service; Federal Register, Section 42)
Key takeaways
– LIHTC encourages private capital for affordable rental housing by converting tax credits into equity for projects. (CRS)
– Credits are claimed over 10 years; properties must meet income and rent limits for a minimum compliance period (generally 15 years). (Section 42)
– There are two main credit types—commonly called the “9%” and “4%” credits—used for different finance scenarios. (CRS)
– Credits are allocated to states by the federal government; states distribute credits through a Qualified Allocation Plan (QAP). (CRS; state housing agencies)
– From 1987–2023 the LIHTC helped create millions of affordable units (Investopedia/HUD data). (HUD PD&R LIHTC data)
How the LIHTC works — a high‑level flow
1. Federal law establishes a per‑state credit allocation amount. (Congressional Research Service)
2. State housing finance agencies (HFAs) publish a QAP that sets priorities and selection criteria. Developers apply to the state for an award of credits. (State HFAs; CRS)
3. If a developer wins credits, those credits are usually syndicated (sold) to investors (banks, insurance companies, tax credit funds). The investor provides equity to the project in exchange for the future stream of tax credits plus tax benefits from depreciation and other deductions. (CRS; industry sources)
4. The developer uses the equity to reduce the amount of debt needed, lowering operating costs so units can be offered at restricted rents to qualifying low‑income tenants.
5. Credits are claimed by the investor over a 10‑year period once the building is placed in service (subject to compliance). If the project fails to comply with income/rent limits during the compliance period, credits can be recaptured. (Section 42; CRS)
Types of credits
– 9% tax credit: Often used for projects that do not use tax‑exempt bond financing; provides a larger credit (roughly the higher annual credit percentage applied to the project’s eligible basis). Historically targeted toward new construction and substantial rehabilitation. (CRS; National Housing Conference)
– 4% tax credit: Available for projects that use tax‑exempt bond financing (private activity bonds) or for certain acquisition/revitalization transactions; generally produces less credit per dollar of eligible basis and is often combined with bond financing. (CRS)
Notes:
– Both credits are taken over a 10‑year period after the project is placed in service. (Section 42)
– In practice, many projects use a combination of credits, bonds, and other subsidies. (CRS)
Credit allocation and scale
– The federal government allocates annual LIHTC authority to states; HUD and the IRS provide program rules, but states decide which projects get credits through their QAPs. (CRS; Section 42)
– Because available credits are limited, competition is common—especially in high‑cost or high‑demand markets. (CRS; state HFAs)
Who qualifies (project and tenant requirements)
– Project eligibility: A broad range of housing types can qualify (single‑family rentals, duplexes, apartments, townhouses) if developers meet the program’s eligible basis and other requirements. (HUD PD&R)
– Tenant eligibility: LIHTC units must be rented to tenants whose income meets one of the statutory income tests (these tests define the percentage of units that must be reserved for low‑income households and the income thresholds). Projects must comply for the mandatory compliance period (generally 15 years); many states require a longer “extended use” period. (Federal Register: Section 42; CRS)
– Income limits are tied to area median income (AMI), which varies by region and is updated periodically by HUD. Typical thresholds referenced in the program are 50% and 60% of AMI, but how many units and what test is used depends on the award and QAP. (HUD; Section 42)
Compliance, recapture and timelines
– Credits are claimed over 10 years once the building is placed in service.
– The statutory compliance period is at least 15 years; failure to comply can trigger recapture of some or all credits. States often require longer affordability periods (e.g., additional 15 years or more) via regulatory agreements. (Section 42; CRS)
– Developers and owners must document tenant incomes, maintain records, and file required forms (for example, IRS Form 8609 is used in the LIHTC process). (IRS; Section 42 guidance)
How much does the LIHTC cost taxpayers?
– The LIHTC is a tax expenditure (a reduction in federal tax revenue). Estimates vary with program size and tax policy; Congressional Joint Committee on Taxation estimated the LIHTC cost at roughly $13.5 billion per year (with projections rising—JCT estimated about $15.5 billion by 2028 in its December 2024 estimates). (U.S. Congress Joint Committee on Taxation)
Are there downsides or criticisms?
Common criticisms include:
– Concentration and location effects: Critics argue credits can concentrate poverty in specific areas if development clusters in low‑opportunity neighborhoods. (Academic and policy literature)
– Limited affordability term for some projects: Affordability is required at federal minimums for 15 years; after that many properties may convert to market rents unless states require longer periods. This can reduce long‑term affordability. (CRS; program critics)
– Not always targeted to the lowest incomes: LIHTC apartments often target households at 50–60% of AMI, while the highest need is often at much lower income levels (e.g., <30% AMI). Additional subsidies are often needed to serve the poorest households. (Policy analyses)
– Complexity and costs: The program’s rules, compliance monitoring, and transaction structures add administrative and transaction costs that can reduce efficiency. (Industry analyses)
– Potential market effects: Some argue the subsidy can lift land and construction prices in certain markets or reward projects that would have been built anyway in desirable locations. (Critiques cited in policy literature)
How successful has the LIHTC been?
– Production: LIHTC is the largest federal affordable housing production program. Between program inception (1987) and recent years it has financed several million affordable units (investopedia/HUD data cite about 3.7 million units created through 2023). (HUD PD&R; Investopedia summary)
– Performance: LIHTC properties historically have had low foreclosure rates (under 1% in some analyses) and mobilize large amounts of private capital into affordable housing projects. (Industry reports; CRS)
– Limitations: While it has produced many units, critics say it has not fully solved homeless or deep affordability gaps and often requires layering with other subsidies to serve extremely low‑income households. (CRS; HUD analyses)
What changes are coming / recent legislative changes
– Legislative changes can alter how credits are allocated and the rules for combining credits with other financing. For example, the One Big Beautiful Act (H.R.1) enacted July 4, 2025 (per sources cited by Investopedia), included changes scheduled to take effect in 2026: raising states’ annual allocation authority (from 9% to 12% of a specified base) and lowering the tax‑exempt bond financing threshold (from 50% to 25%) for eligibility of the 4% credit. Readers should consult the statute text and state guidance for full details and implementation timelines. (Congress.gov; Nixon Peabody; CRS summaries)
Practical steps — how to use or participate in the LIHTC program
For developers (steps to pursue LIHTC financing)
1. Learn your state’s QAP and priorities: Contact your state housing finance agency (HFA) and review the Qualified Allocation Plan; QAPs determine selection criteria and scoring. (State HFAs)
2. Structure the project budget: Estimate eligible basis, expected credit award (9% vs 4%), other subsidy sources (HOME, CDBG, state tax credits), and the expected equity price from syndicators. (CRS; industry practice)
3. Apply competitively: Prepare an application addressing selection criteria (project need, location, cost containments, design, services). Deadlines and scoring matter. (State HFA)
4. Secure financing commitments: After an award, finalize construction financing, tax‑exempt bonds if applicable, and syndication agreements. (Industry practice)
5. Meet construction and “placed in service” timelines, lease to qualified tenants, document incomes, and secure IRS Form 8609 issuance to claim credits. Maintain compliance records. (IRS; Section 42)
For investors and syndicators
1. Due diligence: Evaluate project feasibility, eligible basis, underwriting, developer capacity, and compliance risks that could trigger recapture. (Investor practice)
2. Partnership documents: Use limited partnership ownership and investor guarantees where appropriate. Plan for exit and syndication pricing to match investor tax appetite. (Industry practice)
3. Ongoing monitoring: Ensure the owner meets tenant eligibility and rent restrictions for the compliance period and any extended use period. (IRS guidance)
For renters and people seeking affordable units
1. Find LIHTC properties: Check listings at your state housing finance agency, local housing authorities, HUD resources, or third‑party affordable housing portals (search “tax credit” or “LIHTC” in rental listings). (State HFAs; HUD)
2. Understand income/rent limits: AMI and income limits differ by area and household size—verify current HUD income limits for your area. (HUD)
3. Prepare documentation: Typical documents include pay stubs, tax returns, ID, and household composition verification. Apply early; demand often exceeds supply. (Property management practice)
For policymakers and advocates (practical reforms to consider)
– Extend or incentivize longer affordability periods to preserve units long‑term (state QAPs can require longer periods).
– Pair LIHTC with operating subsidies to serve very low‑income households (e.g., project‑based vouchers).
– Strengthen geographic targeting and community investments to avoid concentration of poverty.
– Simplify compliance and reporting to reduce transaction costs without undercutting accountability. (Policy literature; CRS)
Sources and further reading
– Congressional Research Service, “An Introduction to the Low‑Income Housing Tax Credit.” (CRS)
– Federal Register, Section 42 — Low‑Income Housing Credit regulations.
– U.S. Department of Housing and Urban Development (HUD), Office of Policy Development & Research — LIHTC property‑level data.
– U.S. Congress Joint Committee on Taxation, “Estimates of Federal Tax Expenditures for Fiscal Years 2024–2028.”
– State housing finance agencies (QAPs and program guidance; e.g., New York State Homes and Community Renewal).
– Industry and legal analyses on recent legislative changes (e.g., Congress.gov text of H.R.1—One Big Beautiful Bill; Nixon Peabody summaries).
The bottom line
The LIHTC is the federal government’s main program for leveraging private capital to build and preserve millions of rental units affordable to lower‑income households. It has produced substantial housing stock at scale and continues to be central to affordable housing strategies, but it has limits—particularly for the lowest‑income households and long‑term affordability. Developers, investors, tenants, and policymakers all play roles in how effective LIHTC is locally; understanding state rules, QAP priorities, and compliance obligations is essential for any participant.
– Summarize your state’s current QAP and LIHTC application deadlines (tell me the state).
– Walk through a sample developer pro forma showing how credits convert to equity.
– Provide a checklist of documentation landlords/owners must keep to remain in compliance.