The American housing market is currently caught in a vice of its own making. From the coastlines of California to the booming suburbs of Texas, the cost of shelter has skyrocketed, placing an unprecedented strain on household budgets and stalling economic mobility. While economists, urban planners, and politicians often point to high interest rates or supply-chain bottlenecks as the primary culprits, a growing chorus of experts—including analysts from the American Enterprise Institute (AEI) and the Center for American Progress—contends that the fundamental driver of the crisis is a chronic, systemic lack of housing supply.
To return to historical vacancy rates and alleviate the crushing weight of overcrowding, the United States needs to build millions of new homes. However, the current federal tax code acts as a persistent barrier to this goal. While the code provides generous incentives for homeownership, it paradoxically penalizes the development of new rental housing. As policymakers seek solutions, a legislative proposal known as the Rental Housing Investment Act (RHIA) has emerged as a potential game-changer, offering a path toward "full expensing" that could unlock new construction and finally align federal tax incentives with the urgent need for more homes.
The Chronology of a Crisis and the Legislative Response
The trajectory of the current housing shortage was decades in the making, but the legislative focus on tax reform as a corrective tool has accelerated significantly over the last year.
- Mid-2024 to Early 2025: As inflation impacted construction costs and interest rates remained elevated, new multifamily starts began to lag behind the explosive demand for rental units.
- March 2026: Recognizing the growing gap between supply and demand, Senator Lisa Blunt Rochester (D-DE) introduced the Rental Housing Investment Act (RHIA). The bill was framed not as a traditional subsidy, but as a structural correction to the tax code.
- May 2026: The momentum for the bill grew as a bipartisan companion version was introduced in the House of Representatives by Rep. Claudia Tenney (R-NY), signaling a rare consensus on the need to address the tax bias against developers.
- Present Day: The debate has shifted from whether to incentivize housing to how to do it most efficiently, with the focus sharpening on "original use" provisions that ensure tax relief triggers actual shovels in the ground rather than merely subsidizing existing assets.
The Mechanics of the Penalty: Why the Tax Code Discourages Building
To understand why the current tax code suppresses housing supply, one must look at how businesses are treated when they invest in capital. When a company buys industrial machinery or computer equipment, it can typically deduct the full cost immediately. This "expensing" approach encourages businesses to invest in productivity and growth.
Developers, by contrast, face a far more punitive reality. If a developer builds an apartment complex, they are forced to depreciate the cost of the structure over 27.5 years. In terms of "present value"—the actual worth of those deductions over time—this structure effectively provides the developer with only about 50 cents on the dollar. Because the developer is forced to pay taxes on "income" that is effectively tied up in the cost of the structure, they are essentially being taxed on phantom revenue.
This penalty renders many projects non-viable. If a project doesn’t "pencil out" on a spreadsheet, it never leaves the drawing board. The result is a smaller national housing stock, higher rents for tenants, and a diminished economy.
Supporting Data: The Case for Targeted Investment
The power of the RHIA lies in its precision. Unlike broad-based homebuyer tax credits or federal subsidies that target existing homeowners, the RHIA is designed to ensure that nearly every dollar of forgone tax revenue is directed toward the creation of new units.
The "Original Use" Requirement
The legislation stipulates that the tax deduction only applies to properties where the "original use" commences with the taxpayer. This is a critical distinction. Currently, when the government offers broad tax breaks for housing, those dollars are often absorbed by the massive existing market.
Consider the national housing stock: there are roughly 147 million homes in the U.S. Each year, only about 1.5 million new homes are built. If a policy provides a benefit to all housing, only about 1 percent of that benefit reaches new construction. Even programs targeted at home purchases are inefficient; because existing home sales outnumber new home sales by a ratio of roughly six to one, most of those subsidies merely inflate the value of existing properties rather than expanding the housing supply.
Austin vs. San Diego: A Study in Incentives
The difference in impact between broad subsidies and targeted expensing can be seen in a comparison of Austin, Texas, and San Diego, California. Both cities have roughly 1.1 to 1.2 million homes and similar annual sales volume. Yet, because of differences in local permitting and development environments, Austin permits approximately 20,100 new multifamily units annually, while San Diego permits only 6,800.
Under a generic, untargeted subsidy program, both cities would receive nearly equal financial support, regardless of their output. However, under the RHIA’s expensing model, the reward is tied directly to production. If we assume a hypothetical subsidy structure, Austin would capture nearly three times the benefit of San Diego because it is actually building three times the housing. This creates a powerful, market-driven incentive for municipalities to pursue "upzoning" and streamline the development process.
Official Perspectives and Economic Implications
The argument for the Rental Housing Investment Act is centered on economic neutrality. By allowing developers to immediately deduct up to $150,000 per unit—and up to $250,000 for projects that meet specific affordability requirements—the government removes the "tax tilt" that currently favors older, established housing over new, modern, and energy-efficient developments.
Pro-Growth vs. The Status Quo
Critics of tax cuts often argue that they reduce government revenue. However, supporters of full expensing, such as the Tax Foundation, point to the concept of "dynamic scoring." While a traditional, static view might see a decline in revenue, a dynamic view recognizes that incentivizing the construction of millions of new homes increases the overall tax base. Increased construction activity creates jobs, boosts local economies, and lowers the cost of living for residents, which has long-term positive effects on federal revenue.
In their analysis, Options for Reforming America’s Tax Code, researchers found that while full expensing for all structures would have a conventional cost, the pro-growth nature of the policy would ultimately reduce long-term deficits. The RHIA functions as a surgical application of this principle, focusing specifically on the residential sector where the supply crunch is most severe.
Implications for the Future of Housing
The implications of adopting the RHIA are twofold: it provides a necessary fiscal stimulus for the construction industry and it acts as a catalyst for local regulatory reform.
- Supply-Side Correction: By lowering the effective tax rate on new rental developments, the bill makes it easier for developers to secure financing for projects that were previously stalled by thin margins.
- Market Efficiency: Because the policy is limited to "original use," it avoids the inflationary pressure that often accompanies broad-based housing subsidies. It does not incentivize the "churning" of existing real estate; it incentivizes the creation of new space.
- Encouraging Local Reform: By making the financial benefits contingent upon building, the policy essentially creates a "bonus" for cities that choose to lower their barriers to development. If a city wants to see more of this tax relief flow into its jurisdiction, the most logical step is to reform its zoning laws to allow more multifamily construction.
Conclusion: A Rational Path Forward
The American housing crisis will not be solved by a single piece of legislation, nor will it be fixed by federal policy alone. However, the tax code is currently working against the goal of affordability, penalizing the very act of building that is required to bring prices back into reach for the average American.
The Rental Housing Investment Act represents a sophisticated, pro-growth departure from the status quo. By shifting from a system of depreciation to one of immediate expensing for new rental units, policymakers can ensure that federal dollars are spent on building the future rather than subsidizing the past. For a nation desperate for more housing, this is not just a tax reform; it is a structural necessity for long-term economic health and social stability.
