The One Big Beautiful Act (OBBBA), signed into law on July 4, 2025, represents the most significant tax and economic policy shift affecting middle market M&A since the 2017 Tax Cuts and Jobs Act. With provisions ranging from permanent 100% bonus depreciation to temporary manufacturing facility expensing, from enhanced R&D deductions to modified interest expense limitations, the Act has fundamentally altered deal economics, structure and strategy across the middle market ecosystem. This comprehensive analysis examines the Act’s multifaceted impact on transaction dynamics, providing strategic guidance for all participants in the middle market dealmaking ecosystem.
Deal Economics Transformation
Valuation Impact and Multiple Expansion
The OBBBA’s permanent tax provisions have driven meaningful multiple expansion across most middle market sectors. According to Valuation Research Corp., EBITDA adjustments rebounded to 10.88% in Q1 2025 M&A deals, the highest since 2021.¹ This aggressive adjustment approach, combined with improved cash flow from tax benefits, has justified higher purchase prices while maintaining sponsor return thresholds.
The restoration of 100% bonus depreciation for qualified property acquired after January 19, 2025, provides immediate cash flow benefits.² Paul Hastings calculates that the combined impact of bonus depreciation, R&D expensing and Section 163(j) improvements could enhance IRRs by 200-400 basis points for leveraged transactions.³
Cost of Capital Recalibration
The Act’s business interest deduction provisions, which permanently restore EBITDA-based calculations for Section 163(j) limitations, have meaningfully reduced the after-tax cost of debt financing. According to Barnes Dennig, for tax years beginning on or after Jan, 1, 2025, the limitation is calculated as 30% of adjusted taxable income computed without regard to depreciation, amortization or depletion.⁴ This change can increase allowable interest deductions by 30% or more for capital-intensive businesses.
This cost reduction has enabled higher leverage levels while maintaining comparable coverage ratios. Capstone Partners reports that average leverage for sponsored middle market transactions reached 4.70x EBITDA in Q4/24,⁵ with manufacturing transactions potentially justifying higher levels given additional OBBBA benefits.
Cash Flow Modeling Revolution
Traditional three-statement models have required substantial revision to capture the Act’s complex provisions. The interplay between bonus depreciation, Qualified Production Property (QPP) expensing, R&D deductions, and various credits has created modeling complexity that advantages sophisticated buyers with robust analytical capabilities.
EisnerAmper notes that PE funds must carefully model the interaction of multiple provisions, particularly the temporary nature of QPP benefits (construction must begin before Jan. 1, 2029) and the permanent nature of other provisions.⁶
Strategic and Structural Innovations
Time-Sensitive Deal Strategies
The Act’s temporary provisions have created unprecedented time pressure for certain transaction types. The QPP provision, allowing 100% expensing of manufacturing facilities with construction beginning before Jan. 1, 2029, has compressed strategic planning horizons⁷.
Grant Thornton emphasizes that qualifying property must be nonresidential real property that is an integral part of manufacturing, production or refining tangible personal property, excluding areas used for offices or administrative services.⁸ This specificity requires careful planning to ensure compliance while maximizing benefits.
Entity Structure Optimization
The Act’s provisions have elevated entity structuring from tax technicality to strategic imperative. Arnold & Porter highlights the complexity of optimizing benefits across bonus depreciation, QPP provisions, R&D deductions and managing foreign entity restrictions.⁹
The ability to immediately expense R&E costs for tax years beginning after Dec. 31, 2024, with options to deduct previously capitalized amounts either immediately or over two years, requires sophisticated planning around entity types, asset allocations and holding structures.¹⁰
Sector-Specific Impacts
Manufacturing and Industrials: The Clear Winners
Manufacturing has emerged as the primary beneficiary under the OBBBA framework. BDO analysis confirms that the combination of QPP expensing, bonus depreciation and R&D benefits fundamentally changes investment economics for manufacturers.¹¹
The temporary facility expensing provision has catalyzed consolidation activity. Manufacturing Dive reports significant Q1/25 transactions including Thermo Fisher’s pending acquisition of Solventum’s biologics manufacturing business, though explicit OBBBA citations remain limited given the law’s recent enactment.¹²
Technology and Software: R&D Renaissance
Software and technology companies have experienced meaningful cash flow improvement from restored R&D expensing. For a typical software company spending 20% of revenue on R&D, immediate expensing versus five-year amortization improves free cash flow by approximately 8% to 10% based on Secured Research estimates.
The $10.6 billion Thoma Bravo acquisition of Boeing’s Digital Aviation Solutions, with its $4 billion unitranche facility, demonstrates how technology transactions are leveraging both OBBBA benefits and private credit availability.¹³
Healthcare: Mixed Implications
Healthcare transactions face conflicting OBBBA impacts. While medical device and pharmaceutical companies benefit from R&D expensing, the Act’s broader fiscal provisions create uncertainty for healthcare services providers dependent on government reimbursements. The restoration of immediate R&D expensing particularly benefits pharmaceutical and medical device companies with significant development costs.
Ecosystem Evolution and Adaptation
Private Equity: Strategic Differentiation
PE firms have diverged in their OBBBA strategies. Ballard Spahr notes that funds are focusing on maximizing the interplay between various provisions, with particular attention to timing requirements for temporary benefits.¹⁵
The compressed timeline for QPP benefits has accelerated investment strategies. KBKG emphasizes that tax practitioners and business leaders should begin planning immediately, as many provisions take effect retroactively to the start of 2025.¹⁶
Investment Banks: Advisory Complexity
Investment banks have expanded capabilities to address OBBBA complexity. The need to optimize transaction structures for maximum benefit capture while navigating foreign entity restrictions has made specialized tax advisory essential.
Abitos highlights that businesses must navigate complex interactions between provisions, including the expansion of Section 179 limits to $2.5 million and various phase-out thresholds.¹⁷
Lenders: Underwriting Evolution
Lenders have adapted underwriting to reflect OBBBA impacts. The restoration of EBITDA-based interest deduction calculations significantly improves coverage ratios for leveraged borrowers.
Capstone Partners data shows that despite elevated leverage levels, the improved deductibility of interest expense has maintained debt service coverage ratios at acceptable levels.¹⁸
Law Firms: Specialized Expertise Requirements
Legal advisors have developed specialized OBBBA practices. Paul Hastings has published detailed guidance for PE funds navigating the Act’s provisions, emphasizing the need for careful structuring to maximize benefits while ensuring compliance.¹⁹
Risk Factors and Mitigation Strategies
Implementation Uncertainty
Despite the Act’s passage, implementation details continue emerging. Treasury guidance on QPP qualification criteria and foreign entity restrictions remains incomplete, creating structuring challenges.
Compliance Complexity
The Act’s foreign entity restrictions and supply chain requirements create ongoing compliance obligations. GHJ Advisors notes particular complexity around previously capitalized R&E expenditures and the elections available for their treatment.²⁰
Timeline Pressure
The 2029 deadline for QPP construction creates execution risks. Grant Thornton warns that poor planning could result in missed opportunities or non-qualifying investments.²¹
Best Practices for Market Participants
For Buyers/Sponsors
- Model Comprehensively: Develop sophisticated models capturing all OBBBA provisions and their interactions
- Act Quickly: Front-load investments to maximize temporary benefits before 2029 deadlines
- Structure Flexibly: Maintain ability to adjust structures based on emerging Treasury guidance
- Document Thoroughly: Ensure proper documentation for QPP qualification and R&D expense substantiation
For Sellers
- Pre-Transaction Planning: Implement OBBBA-favorable structures before marketing
- Highlight Benefits: Quantify OBBBA advantages in marketing materials
- Provide Documentation: Compile support for benefit eligibility
- Consider Timing: Launch processes allowing buyers to capture temporary benefits
For Advisors
- Develop Expertise: Build deep OBBBA knowledge as competitive differentiator
- Integrate Services: Combine M&A, tax and operational expertise
- Track Precedents: Monitor market practice evolution
- Educate Clients: Provide regular updates on implementation guidance
Market Outlook and Future Evolution
The OBBBA’s impact on middle market M&A will continue evolving as Treasury guidance emerges and market practice develops. McKinsey’s Global Private Markets Report notes that while dry powder reached record levels ($3.9 trillion globally), deployment challenges persist amid valuation uncertainties.²²
Key factors shaping future market dynamics include:
- Continued PE Adaptation: Firms will refine strategies to optimize OBBBA benefits
- Sector Rotation: Manufacturing and technology likely to see increased activity
- Structure Innovation: New financing and entity structures will emerge
- Regulatory Clarity: Treasury guidance will reduce implementation uncertainty
Conclusion
The One Big Beautiful Act has fundamentally transformed middle market M&A, creating both opportunities and challenges requiring sophisticated navigation. Its comprehensive provisions touching every aspect of deal economics, structure and execution demand that market participants develop specialized expertise and capabilities. The restoration of 100% bonus depreciation, introduction of QPP expensing, R&D deduction improvements, and Section 163(j) modifications collectively create a new paradigm for transaction evaluation and structuring.
Those who successfully master the Act’s complexities — understanding not just individual provisions but their interactions and implications across the deal lifecycle — will achieve superior outcomes. As the market continues adapting to this legislative framework, the ability to optimize OBBBA benefits while managing associated risks will increasingly separate winners from losers in middle market dealmaking.
Footnotes
¹ “What’s the Deal With Deals?,” Valuation Research Corp., 2025. https://www.valuationresearch.com/insights/whats-the-deal-with-deals/
² “OBBBA offers new ways to accelerate depreciation,” Grant Thornton, 2025. https://www.grantthornton.com/insights/alerts/tax/2025/insights/obbba-offers-new-ways-to-accelerate-depreciation
³ “One Big Beautiful Bill Act — A Private Equity Perspective,” Paul Hastings LLP, July 2025. https://www.paulhastings.com/insights/client-alerts/one-big-beautiful-bill-act-a-private-equity-perspective
⁴ “What Is Section 163(j)? | OBBB Changes Interest Limitation,” Barnes Dennig, 2025. https://www.barnesdennig.com/one-big-beautiful-bill-section-163j-interest-limitation/
⁵ “Middle Market Leveraged Finance Report – Winter 2025,” Capstone Partners, 2025. https://www.capstonepartners.com/insights/middle-market-leveraged-finance-report/
⁶ “Key Insights for Private Equity on the One Big Beautiful Bill Act,” EisnerAmper, July 2025. https://www.eisneramper.com/insights/tax/private-equity-insights-obbba-0725/
⁷ “Incentivizing Production: What the OBBBA Means for Manufacturing,” BDO, 2025. https://www.bdo.com/insights/tax/incentivizing-production-what-the-obbba-means-for-manufacturing
⁸ “OBBBA offers new ways to accelerate depreciation,” Grant Thornton, 2025. https://www.grantthornton.com/insights/alerts/tax/2025/insights/obbba-offers-new-ways-to-accelerate-depreciation
⁹ “Key OBBBA Tax Provisions,” Arnold & Porter, July 2025. https://www.arnoldporter.com/en/perspectives/advisories/2025/07/key-obbba-tax-provisions-individuals-partnerships-businesses-and-corporations
¹⁰ “Treatment of Capitalized IRC Section 174 R&E Expenditures,” GHJ, 2025. https://www.ghjadvisors.com/ghj-insights/treatment-of-capitalized-irc-section-174-research-and-experimentation-expenditures-during-a-transaction
¹¹ “Incentivizing Production: What the OBBBA Means for Manufacturing,” BDO, 2025. https://www.bdo.com/insights/tax/incentivizing-production-what-the-obbba-means-for-manufacturing
¹² “10 manufacturing acquisitions to know from Q1,” Manufacturing Dive, 2025. https://www.manufacturingdive.com/news/m-and-a-top-deals-q1-2025-thermofisher-jabil/744676/
¹³ “Thoma Bravo’s $10.6B Boeing Digital Aviation Acquisition,” CorpDev.Org, April 23, 2025. https://www.corpdev.org/2025/04/23/thoma-bravos-10-6b-boeing-digital-aviation-acquisition-anchored-by-4b-private-credit-consortium/
¹⁴ “Initial Insights Into the One Big Beautiful Bill,” Ballard Spahr, July 2025. https://www.ballardspahr.com/insights/alerts-and-articles/2025/07/initial-insights-into-the-one-big-beautiful-bill-key-provisions
¹⁵ “KBKG Tax Insight: One Big Beautiful Bill,” KBKG, July 8, 2025. https://www.kbkg.com/feature/house-passes-tax-bill-sending-to-president-for-signature
¹⁶ “2025 Tax Law Changes for Businesses,” Abitos, 2025. https://abitos.com/obbba-2025-business-tax-breakdown/
¹⁷ “Middle Market Leveraged Finance Report,” Capstone Partners, 2025. https://www.capstonepartners.com/insights/middle-market-leveraged-finance-report/
¹⁸ “One Big Beautiful Bill Act — A Private Equity Perspective,” Paul Hastings LLP, July 2025. https://www.paulhastings.com/insights/client-alerts/one-big-beautiful-bill-act-a-private-equity-perspective
¹⁹ “Treatment of Capitalized IRC Section 174 R&E Expenditures,” GHJ, 2025. https://www.ghjadvisors.com/ghj-insights/treatment-of-capitalized-irc-section-174-research-and-experimentation-expenditures-during-a-transaction
²⁰ “OBBBA offers new ways to accelerate depreciation,” Grant Thornton, 2025. https://www.grantthornton.com/insights/alerts/tax/2025/insights/obbba-offers-new-ways-to-accelerate-depreciation
²¹ “Global Private Markets Report 2025,” McKinsey, 2025. https://www.mckinsey.com/industries/private-capital/our-insights/global-private-markets-report
