One of the most common questions from developers new to affordable housing is: where does the money come from? A LIHTC development does not get financed like a market-rate apartment building. It involves multiple funding sources — each with its own rules, timelines, and requirements — layered together into a capital stack that makes the deal feasible on restricted, below-market rents.
This guide breaks down each piece of the LIHTC capital stack — what it is, how it is sized, what it costs, and how all the pieces fit together to close a deal.
Affordable housing developments face a fundamental economic problem: the rents that income-restricted tenants can afford are lower than the rents needed to support the operating costs and debt service of the development. This gap — between what the market can support and what restricted rents generate — is what all the complexity in affordable housing finance is designed to solve.
LIHTC tax credit equity fills the largest portion of this gap by attracting corporate investors who pay for tax credits they can use to reduce their federal tax liability. The credits have real value to investors — typically $0.85 to $0.95 per dollar of credit — and that value, when paid to the development partnership, provides equity that reduces the amount of debt the project needs to carry. Lower debt means lower debt service, which means the project can operate on lower rents.
The tax credit is the engine of the deal. Under IRC §42, eligible affordable housing developments receive an allocation of tax credits from the state housing finance agency (HFA). These credits — delivered to investors over 10 years — are worth a dollar-for-dollar reduction in federal tax liability.
| Feature | 9% Credits | 4% Credits |
|---|---|---|
| Credit rate | ~9% of eligible basis per year | ~4% of eligible basis per year |
| Allocation process | Competitive — limited annual state allocation | Non-competitive — linked to tax-exempt bond financing |
| Equity generated | Higher — can cover 50–65% of TDC | Lower — typically 30–45% of TDC, requires more debt/soft sources |
| Best use | New construction; highly competitive markets | Larger projects; preservation; bond-eligible deals |
| Timeline | Annual round; 6–18 months from application to reservation | Available year-round; 3–9 months to bond issuance |
For most rural affordable housing deals, 9% credits are the preferred path because they generate more equity per unit and therefore require less permanent debt — which is especially important in rural markets where operating income is lower. However, competition for 9% credits is intense in most states, and developers need a strong application to win an allocation.
The amount of tax credit equity available to a deal is determined by the "eligible basis" — the qualifying costs of the development (essentially total development cost minus land and certain ineligible items) — multiplied by the applicable credit percentage and the equity price paid by the investor.
Example: A 50-unit development with $8 million in eligible basis, a 9% credit rate, and an equity price of $0.90 per credit generates approximately $720,000 per year in credits over 10 years, which the investor pays roughly $6.5 million for upfront (or in installments during construction and lease-up).
Projects located in Qualified Census Tracts (QCTs) or Difficult Development Areas (DDAs) designated by HUD may be eligible for a 130% basis boost — meaning eligible basis is multiplied by 130% before applying the credit rate. This increases the credits available and the equity generated. Check your project site's QCT/DDA status early — it can significantly change deal feasibility.
Even with substantial LIHTC equity, most deals require permanent debt to fund the remaining portion of total development cost. The permanent loan is repaid from the property's net operating income over time.
For LIHTC deals, the key constraint on debt sizing is the debt coverage ratio (DCR) — lenders require that net operating income (NOI) exceed annual debt service by a required margin (typically 1.15x to 1.25x). Because LIHTC properties operate on restricted rents that limit NOI, the amount of debt the property can support is often lower than what the developer would prefer.
Common permanent debt sources for LIHTC deals include:
In most markets, LIHTC equity plus permanent debt does not fully fund the total development cost. The remaining gap — often called the "soft gap" — is filled with soft sources: loans or grants that carry below-market interest rates, deferred repayment, and longer terms that make them effectively equivalent to equity in the deal structure.
Common soft sources include:
The developer fee is the compensation paid to the developer for building the project. It is sized based on eligible basis and state QAP limits — typically 10–15% of total development cost, subject to state maximums.
In most LIHTC deals, the developer cannot take the entire fee at closing — there is not enough cash in the deal to pay it. Instead, a portion (often 50–75%) is deferred and paid out of future operating cash flow over the first 10–15 years of the property's operation. This deferred portion functions as equity in the deal, filling the final gap in the capital stack.
Consider a hypothetical 48-unit new construction LIHTC development in a rural U.S. market with a total development cost of $12 million:
The USDA Section 538 loan's 40-year amortization produces annual debt service of approximately $230,000 — supportable by the property's NOI on restricted rents at a comfortable 1.20x DCR. A 30-year conventional loan at the same rate would produce annual debt service of approximately $275,000, pushing the DCR below the minimum threshold and making the deal infeasible at that debt amount.
LIHTC deal structuring is fundamentally about closing the gap between what restricted rents support and what the development costs to build and operate. The deals that work are the ones where:
The deals that fail — or that get built but struggle operationally — are the ones where any of these elements is out of balance: construction costs are underestimated, operating expenses are too lean, debt service is too high, or soft sources fall through late in the process.
538 RMA provides LIHTC deal structuring, financial modeling, and capital stack advisory for affordable housing developers across the United States. All services exclusively for U.S. clients outside Puerto Rico.
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