For commercial real estate investors and business owners, few tax provisions have been as powerful, or as time-sensitive, as bonus depreciation. Introduced at 100% under the Tax Cuts and Jobs Act of 2017, this accelerated depreciation tool allowed investors to immediately deduct the full cost of qualifying assets in the year they were placed in service. That window, however, is closing fast. The phase-down schedule is well underway, and investors who fail to act strategically in the remaining timeline risk leaving significant capital on the table.
Understanding where the rules stand today, and where they are headed, is essential for anyone with active or planned commercial real estate holdings. Whether you are acquiring a new property, renovating an existing one, or structuring a cost segregation study, the decisions you make in 2025 and into 2026 will have measurable consequences on your tax liability for years to come.
The Phase-Down Schedule: Where Things Stand Right Now
The bonus depreciation allowance, which stood at 100% through 2022, began its structured decline in 2023. Under current law, the phase-down schedule is as follows:
- 2023: 80% bonus depreciation allowed
- 2024: 60% bonus depreciation allowed
- 2025: 40% bonus depreciation allowed
- 2026: 20% bonus depreciation allowed
- 2027 and beyond: 0% under current law, reverting to standard MACRS schedules
In practical terms, a commercial investor who placed $1,000,000 in qualifying personal property into service in 2022 could deduct the entire amount immediately. That same investor in 2025 can only deduct $400,000 upfront, deferring the rest over the standard depreciation schedule. The difference in near-term cash flow and tax savings is substantial, particularly for investors in higher tax brackets or those managing large portfolios.
"According to the Tax Foundation, bonus depreciation reduced federal tax liability for businesses by an estimated $49 billion in 2023 alone, underscoring just how consequential this provision is for capital-intensive industries like commercial real estate."
Legislative proposals to restore or extend 100% bonus depreciation have circulated in Congress, most notably as part of broader tax package negotiations in 2024. However, no permanent restoration has been enacted, and investors should plan around current law rather than anticipated changes that may or may not materialize.
Cost Segregation: The Engine Behind Bonus Depreciation Strategy
For commercial real estate investors, cost segregation studies are the primary mechanism for unlocking bonus depreciation at scale. A cost segregation study involves a detailed engineering and accounting analysis that reclassifies components of a building, typically depreciated over 39 years for nonresidential property, into shorter-lived asset classes that qualify for accelerated treatment.
Assets that are commonly reclassified in a cost segregation study include specialty lighting, flooring, cabinetry, certain HVAC components, land improvements, and non-structural interior elements. These items often qualify as 5-year, 7-year, or 15-year property, making them eligible for the current-year bonus depreciation percentage. For a $5,000,000 commercial acquisition, a thorough cost segregation study might identify $800,000 to $1,500,000 in reclassifiable assets, generating a 2025 bonus depreciation deduction of $320,000 to $600,000 at the current 40% rate.
The optimal time to commission a cost segregation study is at acquisition or shortly after a significant capital improvement project. However, investors who skipped this step in prior years are not without options. A "look-back" cost segregation study, sometimes called a catch-up study, allows property owners to claim missed depreciation deductions through an automatic accounting method change (Form 3115) without amending prior returns.
Strategic Timing: Accelerating Acquisitions and Improvements
Given the declining bonus depreciation schedule, timing asset placement into service has become a critical element of commercial real estate tax planning. Investors who are on the fence about acquiring a property, completing a renovation, or making significant equipment purchases should carefully consider the tax implications of acting in 2025 versus waiting until 2026, when the allowance drops to 20%.
Qualified Improvement Property (QIP) is another category worth understanding. QIP refers to interior improvements made to nonresidential buildings after the building was first placed in service. Thanks to a technical correction in the CARES Act of 2020, QIP now has a 15-year depreciation life, making it eligible for bonus depreciation. This is highly relevant for investors who acquire existing office buildings, retail centers, or industrial properties and plan substantial interior renovations post-closing.
Investors should also revisit their current holdings and evaluate whether any capital projects planned for 2026 or later can be reasonably accelerated into calendar year 2025. Even a modest scope of qualifying improvements placed in service before December 31, 2025, captures a 40% immediate deduction rather than the 20% that will be available in 2026 or the standard 39-year straight-line schedule thereafter.
Pairing Depreciation Strategy with Smart Financing
Tax strategy and financing strategy should never be developed in isolation, particularly in a high-interest-rate environment where cash flow optimization is paramount. Commercial investors who leverage financing to acquire or improve properties can amplify the benefit of bonus depreciation: the deduction is calculated on the full asset cost, not merely the equity contributed. This means a property acquired with a 30% down payment and 70% financing still generates a bonus depreciation deduction based on the total qualifying asset value.
This dynamic makes it even more important to work with a commercial mortgage broker who understands the interplay between loan structure, asset classification, and tax planning timelines. The right loan product, whether a conventional commercial mortgage, a bridge loan for a value-add acquisition, or an SBA 504 loan for an owner-occupied property, can significantly affect how and when you place assets into service, and therefore how much depreciation you can accelerate.
It is equally important to coordinate with a qualified CPA or tax advisor who specializes in commercial real estate before executing any major transaction. Passive activity loss rules, at-risk limitations, and alternative minimum tax considerations can all affect the practical benefit of bonus depreciation for a given investor's tax profile. A well-coordinated team of a commercial mortgage broker, CPA, and attorney is the strongest foundation for capturing these benefits effectively.
Looking ahead, the tax landscape for commercial real estate remains in flux. Congressional discussions around broader tax reform are ongoing, and the expiration of several TCJA provisions at the end of 2025 creates a policy environment where significant changes, in either direction, remain possible. Investors who act decisively within the current framework, rather than waiting for legislative certainty that may never arrive, will be best positioned to protect their portfolios and maximize after-tax returns in the years ahead.
