Congress Makes 100% Bonus Depreciation and 20% QBI Deduction Permanent for Real Estate Investors

For the past three years, real estate investors have watched one of their most powerful wealth-building tools slowly evaporate. Under the Tax Cuts and Jobs Act of 2017, bonus depreciation—the mechanism that allows property owners to deduct the cost of major assets immediately rather than over decades—was scheduled to phase out entirely by 2027. But the passage of the One Big Beautiful Bill Act (OBBBA) in July 2025 fundamentally altered the landscape. The legislation permanently restored 100% bonus depreciation and cemented the 20% Qualified Business Income (QBI) deduction into law, reversing the scheduled phase-outs and delivering a massive victory to the commercial real estate sector. As investors finalize their 2026 tax strategies, these permanent provisions have shifted tax planning from a reactive year-end chore to the central pillar of acquisition underwriting.[3]

The headline change for 2026 is the permanent reinstatement of 100% bonus depreciation for qualifying property acquired after January 19, 2025. This provision allows businesses to immediately deduct the full cost of eligible assets—such as equipment, machinery, and certain property improvements—in the year they are placed in service. Alongside this, the OBBBA made the Section 199A QBI deduction permanent. Originally set to expire at the end of 2025, the QBI deduction allows owners of pass-through entities, including LLCs, S-corporations, and partnerships, to deduct up to 20% of their qualified business income from their taxes. Together, these two provisions provide unprecedented long-term certainty for real estate syndicators, developers, and independent landlords.

To understand the magnitude of this legislative reversal, one must look at the trajectory the industry was on. Under the previous tax regime, bonus depreciation began stepping down by 20 percentage points annually starting in 2023. It dropped to 80%, then 60% in 2024, and was scheduled to hit 40% in 2025 and just 20% in 2026. By 2027, the benefit would have disappeared entirely, forcing investors to return to standard straight-line depreciation over 27.5 years for residential properties and 39 years for commercial buildings. The looming expiration had cast a chill over capital-intensive renovation projects, as the math on acquiring and upgrading aging properties became significantly less favorable with each passing year.[3]

The mechanics of bonus depreciation are straightforward but highly lucrative. In standard accounting, when an investor purchases a property, the IRS requires them to deduct the wear and tear of that building over nearly three decades. Bonus depreciation short-circuits that timeline for specific components of the property. It applies to Modified Accelerated Cost Recovery System (MACRS) assets with a recovery period of 20 years or less. This means that while the structural shell of a building must still be depreciated slowly, everything from the parking lot paving to the interior carpeting can be written off entirely in year one.[1][2]

The engine that makes bonus depreciation so powerful for real estate is the cost segregation study. A cost segregation study is an engineering and accounting analysis that dissects a property's purchase price, separating the value of the land and the structural building from the shorter-lived personal property and land improvements. By identifying components like specialized plumbing, decorative lighting, fencing, and cabinetry, the study reclassifies these assets into 5-year, 7-year, and 15-year depreciation buckets. Once reclassified, these components become fully eligible for the 100% bonus depreciation write-off.[4]

Consider the mathematics of a $3 million apartment complex acquisition in 2026. A professional cost segregation study will typically identify roughly 30% of the purchase price as qualifying short-lived components. This represents $900,000 in bonus-eligible assets. Under the newly permanent OBBBA rules, the investor can claim that entire $900,000 as a deduction in the very first year of ownership. For an investor in the 35% federal tax bracket, that single deduction translates to approximately $315,000 in immediate tax savings, drastically reducing the equity required to stabilize the asset and boosting the project's internal rate of return.

Contrast that outcome with what would have happened under the old phase-down schedule. If the 2026 rules had remained at the scheduled 20% bonus depreciation rate, that same $900,000 in reclassified assets would have only yielded a $180,000 first-year deduction. The remaining $720,000 would have been slowly deducted over the subsequent years. By restoring the 100% rate, Congress has effectively handed real estate buyers hundreds of thousands of dollars in upfront liquidity per transaction, fundamentally changing the bidding math for multifamily and commercial assets.

While bonus depreciation supercharges the expense side of the ledger, the permanent Qualified Business Income (QBI) deduction optimizes the revenue side. Section 199A was introduced in 2017 to ensure that pass-through businesses received a tax break comparable to the slashed corporate tax rate. It allows eligible landlords and real estate professionals to deduct 20% of their net rental income right off the top, before ordinary income taxes are applied. However, its temporary nature meant that CPAs and tax strategists were hesitant to build long-term entity structures around it, fearing a massive tax hike in 2026.

The permanence of the QBI deduction removes that looming cliff. Real estate investors can now confidently structure their portfolios using LLCs and limited partnerships, knowing that the 20% discount on their taxable rental income is a permanent fixture of the tax code. The legislation also eased some of the complex W-2 wage and capital investment limitations that previously restricted the deduction for higher-income taxpayers, making it easier for large-scale syndicators and property management firms to claim the full benefit.

However, the massive paper losses generated by 100% bonus depreciation come with a significant catch: the passive activity loss rules. The IRS strictly divides income into active (like a W-2 salary or business income) and passive (like rental property income). By default, losses generated by passive activities can only be used to offset income from other passive activities. They cannot be used to wipe out the tax liability on a high-earning physician's salary or a tech executive's stock options.[2]

The golden ticket to bypassing this limitation is achieving Real Estate Professional Status (REPS). If an investor or their spouse spends more than 750 hours a year and more than half of their total working time in real property trades or businesses, the IRS classifies their rental activities as non-passive. For these active professionals, the $900,000 paper loss from a cost segregation study can be applied directly against their active ordinary income, potentially reducing their overall federal income tax bill to zero.[2]

For passive investors—such as limited partners who write a $100,000 check to a multifamily syndication—the reality is different. When the syndicator passes down a massive year-one depreciation loss on the Schedule K-1, the passive investor cannot use it to offset their day job's salary. Instead, the loss is suspended and carried forward indefinitely. While it doesn't provide an immediate tax refund, this suspended loss acts as a tax shield, absorbing years of future passive cash flow distributions and eventually offsetting capital gains when the property is sold.[2]

Navigating the new rules also requires careful attention to IRS Notice 2026-11, which clarified a critical timing trap regarding the transition to the new law. The permanent 100% rate applies only to property acquired after January 19, 2025. Crucially, the IRS defines the acquisition date as the moment a written binding contract is executed, not the day the transaction closes. This distinction has caught several investors off guard during the 2026 tax filing season.[1][3]

If an investor signed a binding purchase agreement for a commercial building on December 15, 2024, but the deal did not officially close and the property was not placed in service until February 2026, that property is permanently locked into the old phase-down schedule. Because the contract was signed before the January 19 cutoff, the investor is only eligible for 20% bonus depreciation, leaving millions of dollars in potential first-year deductions on the table. Tax advisors are now meticulously auditing contract dates before greenlighting cost segregation studies.[1]

Another major winner in the permanent legislation is Qualified Improvement Property (QIP). QIP refers to interior, non-structural improvements made to nonresidential commercial buildings after the building was first placed in service. This includes renovations like new drywall, interior lighting, and office build-outs. Because QIP carries a 15-year MACRS recovery period, it is fully eligible for 100% bonus depreciation. This makes commercial value-add strategies—buying an outdated office or retail center and gut-renovating the interior—incredibly tax-efficient.[2]

The macroeconomic impact of these permanent tax incentives is already rippling through the construction and commercial real estate sectors. By allowing developers to immediately expense the cost of heavy equipment, specialized building materials, and interior renovations, the tax code is heavily subsidizing capital expenditure. Construction firms are seeing a wave of new project demand as property owners rush to deploy capital into upgrades that they can immediately write off, effectively letting the federal government finance a portion of their renovations.

Ultimately, the permanence of 100% bonus depreciation and the QBI deduction has transformed cost segregation from a tactical, year-by-year tax play into a strategic, portfolio-wide lever. Real estate owners are no longer racing against an expiring clock to place assets in service. Instead, they can underwrite long-term acquisitions, multi-phase developments, and complex syndications with the absolute certainty that the tax code will aggressively reward their capital investments for decades to come.[4]