Section 179D Tax Deduction Claimed in Final Year – Houston Tax Attorneys


Architects and engineers who design energy-efficient government buildings can qualify for a Section 179D tax deduction. Technically, it is the building owner who qualifies, but since the government is the owner of the building and does not pay tax, our tax law allows the allocation of the deduction to the designer. This allocation provides an incentive for designers to take on government building projects.

This allocation raises some interesting questions, such as what year the allocated deduction is available. Designers often work on multiple buildings for the same client or project, and the work typically spans several years. So can the designer simply claim the tax deduction on their current year return–perhaps in the year that the final building for the project is completed? The court in Cannon Corp. v. Commissioner, No. 23-XXX (2d Cir. Feb. 18, 2025), recently answered this question.

Facts & Procedural History

The taxpayer in this case designed energy-efficient buildings for government clients between 2006 and 2011. As the designer, was allocated the Section 179D tax deductions that would normally go to the government building owners. After successfully claiming these deductions on an amended return for 2006, the taxpayer failed to claim approximately $3.9 million in Section 179D deductions for buildings placed in service from 2007 through 2010 on its originally-filed income tax returns.

Instead of filing separate amended tax returns for each year, the taxpayer reported all of the deductions at once on its 2011 tax return. It did this by reporting the deduction as an accounting method change on a Form 3115. The IRS audited the tax return and issued a notice of deficiency denying the Section 179D deductions. The taxpayer challenged this determination in tax court, but the court granted summary judgment for the IRS. This appeal was from the tax court case.

About the Section 179D Deduction

Section 179D allows owners of commercial buildings to deduct the cost of energy efficient commercial building property. This is for property placed in service during the tax year. The amount of the tax deduction is calculated based on a formula that considers the building’s square footage and energy cost reductions.

Specifically, the deduction amount starts at $0.50 per square foot and can increase up to $1.00 per square foot based on the building’s energy efficiency. The rate increases by $0.02 for each percentage point by which the building’s total annual energy and power costs are certified to be reduced by more than 25 percent. For certain qualifying properties, these base amounts can be increased to $2.50 per square foot (up to $5.00 per square foot) if prevailing wage and apprenticeship requirements are met.

The energy efficient improvements must be to one or more of three specific building systems:

  • Interior lighting systems
  • Heating, cooling, ventilation, and hot water systems
  • Building envelope

These improvements must be certified as part of a plan designed to reduce the building’s total annual energy and power costs by 25% or more compared to a reference building that meets minimum efficiency standards. The certification must be performed by qualified individuals using approved software.

As noted above

As noted above, there is an allocation rule that can apply to government-owned buildings. Since government entities cannot use tax deductions, they can allocate the deduction to the person primarily responsible for designing the property. This allocation makes the designer “the taxpayer” for purposes of claiming the Section 179D deduction. Eligible government entities include federal, state, and local governments, their agencies and instrumentalities, Indian tribal governments, and other tax-exempt organizations.

One challenge presented by this Section 179D allocation i…

One challenge presented by this Section 179D allocation is determining who qualifies as the “designer” of the energy-efficient commercial building property. Only the designer is eligible to claim the deduction when the property is owned by a government entity. The courts addressed this in United States v. Oehler, 9 F.3d 1538 (2d Cir. 1993), for a designer who installed and identified additional fixtures for replacement, but did not create the technical specifications for the lighting systems.

The architects and engineers retained provided the designs, and the taxpayer’s role was limited to implementation. Because the taxpayer merely installed the systems rather than designing them, the court held that it was not entitled to the deduction as they were not the designer for purposes of this tax deduction.

When to Report Section 179D Deductions?

Another aspect of this allocation that is challenging is that the designers do not control when the property is placed in service–the government entity does. While designers may complete their work well before the building systems are operational, IRS Notice 2008-40 states that designers may only claim the deduction in the tax year that the government places the property in service.

This timing rule creates practical challenges. Designers may not know exactly when the government places the property in service. Even when they do know the placed-in-service date, they might not learn about their ability to claim the Section 179D deduction until after they have filed their tax return for that year. This raises the question of how to claim the deduction for prior tax years.

One approach taxpayers have tried is to treat missed Section 179D deductions as an accounting method change. A change in accounting method typically involves changing when an item of income or deduction is reported – essentially shifting the timing between tax years. Under Section 481 of the tax code and its regulations, a material item qualifies for accounting method change treatment only if it involves the proper time for including an item in income or claiming a deduction.

Section 179D Deduction for a Prior Year a Method Change?

One might think that taking a Section 179D deduction for a prior year is an accounting method change. An accounting method change typically involves changing when an item of income or deduction is reported–essentially shifting the timing between tax years. Under Section 481 of the tax code and its regulations, a material item qualifies for accounting method change treatment only if it involves the proper time for including an item in income or claiming a deduction.

However, the regulations clarify that an accounting method change cannot permanently alter a taxpayer’s lifetime income. Instead, it must merely affect the timing of when income or deductions are reported. For example, changing from the cash to accrual method shifts when income and expenses are recognized but does not permanently change the total amount reported over time.

This brings us to the court case. The Second Circuit agreed with the tax court that Section 179D deductions do not qualify as an accounting method change. The court noted that these deductions permanently reduced the taxpayer’s taxable income rather than merely shifting the timing of deductions between years. This is due to the Section 179D deduction. Unlike building owners who might accelerate depreciation deductions, designers receive a one-time allocated deduction that permanently reduces their tax liability.

The Second Circuit also found that Revenue Procedure 2011-14

The Second Circuit also found that Revenue Procedure 2011-14, which the taxpayer cited, did not authorize designers to use the accounting method change procedures. While this guidance included some filing instructions for designers, it never explicitly permitted them to report prior year Section 179D deductions as accounting method changes.

The Role of Amended Returns and Statutes of Limitations

The designers do have a few ways to deal with this situation. As noted in this case, the proper procedure for claiming missed Section 179D deductions is to file amended returns for the specific tax years when the buildings were placed in service. The time for filing an amended return is limited by the general three-year statute of limitations for filing amended returns under Section 6511.

It was this timing limitation that prevented the taxpayer in this case from filing an amended return for 2007. The statute of limitations had expired. However, the taxpayer did file “protective” amended returns for the 2008-2010 tax years that were filed within the limitations period. While the court did not directly address these amended returns, they likely preserved the taxpayer’s ability to claim deductions for these years. This is the way that designers can proactively report these deductions when they are not certain as to whether they will be allocated the tax deductions and in what year the property will be placed in service.

The Takeaway

This case shows that Section 179D tax deductions allocated to designers must be claimed in the tax year when the energy-efficient property is placed in service. These deductions cannot be claimed in later years through accounting method changes because they permanently affect taxable income rather than merely shifting the timing of deductions between years. Designers who may qualify for this deduction should consider filing protective claims with the IRS in the years that the properties could have been placed in service. This can help preserve the deductions if the property is placed in service in one year, but the allocation is not made until a later year.

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When a taxpayer has a capital outlay, they generally want to deduct the expense when the money leaves their bank account or when the liability is incurred. However, the accounting matching principle dictates that expenses should be deducted when the related income is received. The matching principle aligns the income and expense recognition. Our income tax rules generally adopt this accounting principle.

The timing issue is disfavored by taxpayers who make substantial capital investments. The taxpayer must pay out funds but cannot take an immediate tax deduction, while still being required to pay income taxes despite having a future tax deduction on the books. This results in a pay-the-IRS-now and recognize-your-tax-benefit later scenario. This issue is particularly problematic for investments in long-term assets such as real estate investments and heavy equipment.

Just about everyone favors immediate expensing. The U.S. Treasury Department has long advocated for a consumption tax system that would essentially allow for immediate expensing of capital investments. Treasury has made incremental progress toward this goal, such as the 2014 tangible property regulations that expanded opportunities for component depreciation of real estate. Similarly, Congress has shown increasing receptivity to immediate expensing, though stopping short of a full consumption tax system. The Tax Cuts and Jobs Act of 2017 represents a compromise position, providing for bonus depreciation on certain real estate assets while maintaining the basic framework of capitalization.

This framework leaves taxpayers with several options for …

This framework leaves taxpayers with several options for immediate expensing for certain types of expenses, but not for others. The recent Weston v. Commissioner, T.C. Memo 2025-16, case provides an opportunity to consider the question of when taxpayers must capitalize rather than deduct certain real estate-related expenses.

Facts & Procedural History

The case involves a commercial real estate agent in California. He began investing in single-family home renovations in Indiana in 2015.

Under an arrangement with his partner, the taxpayer provided funding to acquire and renovate properties. The partner managed the work locally. They both verbally agreed to split profits after the taxpayer recouped his investment plus an 8% return.

In 2016, the taxpayer also began funding a demolition and excavation business run by the partners. This business contracted with Indiana cities for demolition and lot remediation services. The partners had a similar verbal profit-splitting deal for this business.

Through 2017, the taxpayer continued sending money to fund both businesses based on the partner’s periodic funding requests and invoices. These “Indiana Payments” were more than $2.1 million by the end of 2017.

The taxpayer’s confidence in the partner eventually eroded as little progress or financial return materialized. However, he continued funding the demolition business into 2018 and even bought several Indiana properties from the partner in early 2018 for over $700k. After the partner disappeared, the taxpayer attempted to salvage the renovation business. He ended up selling most of the properties in 2018-2019 for a net loss.

On his 2017 tax return, the taxpayer claimed the $2.1 million Indiana Payments as a business loss deduction. The IRS audited the return and disallowed the deduction. The dispute ended up in tax court.

Immediate Expensing Options

The tax code provides several ways to immediately expense real estate-related costs. These provisions usually require some tax planning to benefit from, but the appropriate provision depends on both the nature of the expense and the character of the taxpayer’s real estate activities.

Section 162 serves as the primary authority for deducting ordinary and necessary business expenses, while Section 212 provides parallel treatment for investment activities. Section 179 offers an elective immediate write-off for certain qualifying property, and Section 179D allows deductions for energy-efficient commercial building improvements. There are other provisions that can also apply, but these are the primary tax rules that allow for immediate expensing for real estate expenses.

Section 162 permits immediate deduction of ordinary and necessary business expenses, encompassing routine operating costs such as repairs, maintenance, and utilities, provided these expenses do not materially add to the property’s value or useful life. For taxpayers whose activities do not rise to the level of a trade or business, Section 212 provides similar treatment for expenses incurred in the production of income, primarily benefiting investors who own rental properties but do not qualify as real estate professionals.

Section 179 allows immediate expensing of qualifying prop…

Section 179 allows immediate expensing of qualifying property placed in service during the tax year, though significant limitations apply in the real estate context. The deduction is limited to tangible personal property used in an active trade or business, with most building components excluded, and caps apply. Section 179D provides a specialized deduction for commercial building property meeting specified energy efficiency standards, available to both building owners and tenants who make qualifying improvements.

The nuances of each of these rules is beyond the scope of…

The nuances of each of these rules is beyond the scope of this article–as we are just noting that the first decision a taxpayer has to make is whether one or more of these provisions apply. Our focus in this article is to consider how these immediate expensing options are essentially taken away by the capital improvement rules. What Congress gives in one hand, it often takes away with its other hand.

Caplitziation and Depreciation or Amortization Limitations

The general capitalization rules under Section 263(a) require taxpayers to capitalize amounts paid to improve a unit of property. The regulations establish a three-part test for determining whether an expenditure constitutes an “improvement” requiring capitalization rather than an immediately deductible expense. An improvement exists if the expenditure results in a betterment, adaptation, or restoration of the property.

A betterment occurs when an expenditure fixes a pre-existing material defect, creates a material addition or expansion, or produces a material increase in the property’s capacity, productivity, efficiency, strength, or quality. For example, replacing a leaky roof with upgraded materials that extend its useful life would constitute a betterment requiring capitalization.

An adaptation arises when the expenditure modifies the property for a new or different use from its intended purpose when placed in service. Converting a residential property into an office building exemplifies an adaptation that must be capitalized. However, minor modifications that do not fundamentally change the property’s use may qualify as deductible repairs.

A restoration exists when the expenditure returns the property to its ordinarily efficient operating condition after deterioration, rebuilds the property to a like-new condition, or replaces a major component or substantial structural part. The replacement of an entire HVAC system, for instance, would likely constitute a restoration requiring capitalization.

Beyond these general rules

Beyond these general rules, specific tax code provisions impose additional capitalization requirements for certain real estate expenditures. For example, Section 280B mandates capitalization of demolition costs into the land basis, regardless of the property’s intended future use. There are even more nuanced rules that govern the treatment of interest, taxes, insurance, permits, environmental remediation, construction period overhead, and property management costs.

This is the framework that taxpayers have to apply

This is the framework that taxpayers have to apply. The immediate expensing rules only apply to current expenses, not capital improvements. The distinction turns on whether the expense merely keeps the property in ordinary efficient operating condition, in which case it may be deducted immediately, or whether it materially adds to the property’s value or substantially prolongs its useful life, in which case it must be capitalized. Thus, while routine repairs and maintenance may typically be deducted in the current year, major renovations require capitalization. And then there are more nuanced expenses that one cannot readily discern how the rules apply to, such as standby line of credit fees.

Before moving on, we also note that there are other provisions that can apply even after this expense-vs-capitalization framework that limit otherwise allowable deductions, such as the passive activity loss rules, excess business loss rules, net operating loss rules, hobby loss rules, and others. You can read about these other rules in various posts on our site as we have covered them at length in other articles.

Example of Expensing-Capitalization

This brings us back to this case. In this case, the court had to examine whether the $2.1 million in Indiana Payments could qualify for immediate expensing under any of the discussed provisions, or whether they required capitalization.

The court first considered whether the payments could be deducted as ordinary and necessary business expenses under Section 162. While the taxpayer argued he was engaged in a trade or business, the court found his involvement was more akin to that of an investor. He operated as a passive funding source, rarely visited the properties, and left the day-to-day operations to his partner. The court emphasized that merely managing one’s investments, no matter how extensive, does not rise to the level of a trade or business. This finding effectively precluded any immediate deduction under Section 162.

Similarly, the court found that Section 212 could not salvage the deductions. Even though this provision has a lower threshold than Section 162, applying to investment activities rather than requiring a trade or business, the nature of the expenses themselves still required capitalization. The improvements to the properties were not mere maintenance costs but rather substantial renovations that materially added to the properties’ value.

The Section 179 election was not available because the ex…

The Section 179 election was not available because the expenditures primarily involved improvements to residential real property, which is explicitly excluded from Section 179 treatment. The fact that some personal property may have been included in the renovations could not help the taxpayer, as he failed to maintain records adequately distinguishing between real and personal property improvements.

For the home renovation business

For the home renovation business, the court found the expenses fell squarely within Section 263A’s scope. The Indiana Payments covered direct costs like building materials and labor, as well as indirect costs such as utilities and equipment rentals. Because the properties were held for resale, these improvement costs had to be capitalized into inventory under Section 263A and could only be deducted when the renovated homes were sold. Since no sales occurred in 2017, no deduction was permitted for that year.

The tax court also considered the expenses for the demolition business. As this business did not own the properties it worked on, Section 263A did not apply. However, the court still denied the loss deduction for two reasons. First, some of the expenses may have required capitalization under Section 280B, which mandates adding demolition costs to the land basis. Second, and more fundamentally, the taxpayer failed to maintain adequate records distinguishing between deductible business expenses and capital expenditures for equipment and other assets.

The Takeaway

The case shows both the complexity and importance of properly analyzing real estate-related expenses under the various expensing and capitalization rules. Detailed records that distinguish between potentially deductible expenses and capital improvements are key. Without this type of documentation, taxpayers risk losing deductions even for expenses that might otherwise qualify for immediate expensing, as demonstrated by the court’s denial of deductions for both the renovation and demolition businesses in this case.

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