America is currently grappling with a housing crisis of historic proportions. From the bustling tech hubs of Texas to the coastal enclaves of Southern California, the message from economists, policymakers, and frustrated renters is uniform: the country is not building enough homes. According to data from the American Enterprise Institute (AEI) and the Center for American Progress, the United States faces a structural shortage of millions of homes. This deficit continues to fuel soaring rents, limit social mobility, and stifle household formation.
While the debate often focuses on local zoning laws and land-use restrictions, there is a quieter, more pervasive culprit embedded in the federal tax code. For decades, U.S. tax policy has functioned as an unintentional deterrent to new construction. By favoring existing real estate assets while penalizing the creation of new rental units, the tax code has inadvertently exacerbated the very housing shortage it aims to mitigate. However, a new bipartisan legislative effort—the Rental Housing Investment Act (RHIA)—seeks to recalibrate these incentives by introducing "expensing" for new residential structures.
The Chronology of a Tax Penalty
The origins of the current housing dilemma lie in how the Internal Revenue Service (IRS) treats capital investment. In most sectors of the economy, businesses that purchase equipment—such as machinery or technology—can deduct the full cost of that investment immediately. This "full expensing" approach is widely recognized as a pro-growth mechanism because it aligns the tax burden with the economic reality of an investment.
In contrast, residential developers face a vastly different reality. Under current law, developers must depreciate the cost of new apartment buildings over 27.5 years. Because of the time value of money, these spread-out deductions are worth only about 50 cents on the dollar in present value. Effectively, this means developers are paying taxes on income that exists only on paper, not in their bank accounts.
This structural bias was codified long ago, but its impact has become acute in the post-pandemic economic landscape. As construction costs have spiked and interest rates have fluctuated, this tax penalty has become the deciding factor in whether a project "pencils out." When the math fails to work, the project is abandoned. The housing stock remains static, the supply-demand imbalance worsens, and the broader economy suffers.
Supporting Data: Why "New" Matters
The core argument for the Rental Housing Investment Act lies in the distinction between "old" capital and "new" capital. Many current housing subsidies, such as first-time homebuyer tax credits or federal mortgage assistance, are essentially "rate cuts." They benefit owners of existing homes just as much as they benefit those building new ones.
The data highlights the inefficiency of this approach. For every dollar spent on broad housing subsidies, the vast majority is absorbed by the existing housing stock, which comprises roughly 147 million homes nationwide. In the case of government-subsidized home purchases, existing home sales outnumber new construction sales by roughly six to one. Consequently, roughly 85% of these subsidies bid up the price of existing homes rather than incentivizing the creation of new units.
The contrast between cities like Austin, Texas, and San Diego, California, provides a real-world case study. Both cities have roughly 1.1 to 1.2 million homes and similar annual sales volume. Yet, Austin permits nearly 20,000 new multifamily units annually, compared to San Diego’s 6,800. A subsidy that benefits all housing provides no differential incentive for San Diego to emulate Austin’s growth. However, a tax policy limited to new construction—like the one proposed in the RHIA—would reward the specific act of building, effectively incentivizing municipalities to pursue upzoning and permit reform to capture those tax benefits.
The Rental Housing Investment Act: A Targeted Solution
Introduced in March by Senator Lisa Blunt Rochester (D-DE) and supported by a bipartisan companion bill in the House, the Rental Housing Investment Act represents a pivot toward neutral, pro-growth tax policy. The legislation would allow developers of new rental housing (structures with two or more units) to immediately deduct up to $150,000 per unit. For projects that meet specific affordability criteria—modeled after the successful Low-Income Housing Tax Credit (LIHTC) program—this deduction cap increases to $250,000 per unit.
Crucially, the RHIA includes an "original use" provision. To qualify for the immediate deduction, the property must be brand new. This ensures that the government is not subsidizing the churning of existing real estate portfolios. As the data shows, investors currently spend roughly $166 billion annually purchasing existing large apartment properties—significantly more than the $115 billion spent on new construction. By limiting the tax break to new builds, the RHIA ensures that nearly every dollar of forgone tax revenue is directed toward expanding the nation’s housing supply, with an estimated 93% of the benefits accruing directly to new units.
Official Responses and Political Momentum
The introduction of the RHIA marks a rare moment of bipartisan alignment on the necessity of supply-side reform. By moving away from the "demand-side" subsidies that dominated the previous decade, proponents of the RHIA argue that they are addressing the root cause of the crisis.
"We have to stop treating housing as a speculative asset and start treating it as essential infrastructure," said a spokesperson for the bill’s sponsors during the March introduction. While the bill faces the standard legislative hurdles, it has gained support from a coalition of developers, urbanists, and fiscal conservatives who appreciate the policy’s economic efficiency.
However, some critics of the bill raise concerns about the "teardown" potential—the fear that old, naturally occurring affordable housing could be demolished to make way for new, more expensive units to claim the tax deduction. Supporters of the bill point out that this risk is minimal, given the massive delta between the cost of demolition/new construction and the value of the tax deduction. Furthermore, they argue that the net increase in density—turning a low-density lot into a multi-unit complex—is exactly what the country needs to solve the affordability crisis.
Economic Implications: Beyond the Budget
The fiscal impact of the RHIA is a point of frequent discussion. On a static, "conventional" scoring basis, tax cuts always appear to lose revenue. However, when viewed through a "dynamic" lens, the picture changes. Economists at the Tax Foundation have noted that full expensing for structures is one of the most pro-growth tax changes a government can enact. By reducing the cost of capital, the policy encourages more investment, creates jobs in the construction sector, and eventually expands the tax base as more units are built and occupied.
If enacted, the long-term implications could be profound. By removing the 27.5-year depreciation hurdle, the federal government would be sending a clear signal to the market: the U.S. is open for development. This shift would provide a predictable, long-term incentive for developers to target supply-constrained markets.
Furthermore, the "original use" test serves as a powerful, albeit indirect, tool for local reform. Cities that maintain obstructive, anti-growth regulatory environments will naturally attract less of the RHIA’s benefits. As the disparity between "building" cities and "stagnant" cities becomes more visible in the form of lost tax incentives, the pressure on local councils to modernize their zoning codes will increase.
Conclusion: A Prudent Path Forward
The housing affordability problem in America is not an unsolvable mystery; it is a direct consequence of a mismatch between supply and demand, exacerbated by a tax code that is fundamentally hostile to new construction. The Rental Housing Investment Act is not a panacea—it cannot override local building codes or solve the labor shortage in the trades—but it is a necessary adjustment.
By transitioning from a system that penalizes developers to one that rewards the creation of new, essential housing, the U.S. can take a significant step toward stabilizing the market. The choice is clear: we can continue to subsidize the purchase of existing, increasingly scarce homes, or we can use the tax code to do what it does best: incentivize the creation of new, productive capital. If the goal is a more affordable America, the focus must remain on the shovel, not the sale.
