Key Tax Provisions in the 2025 OBBB
What it means for California businesses and CPAs

Stay ahead of the biggest tax reform since 2017
The 2025 One Big Beautiful Bill Act (OBBB) brings sweeping updates to the tax code, many with direct implications for California taxpayers and the CPAs who serve them. From changes to the SALT deduction cap and international tax rules, to enhanced R&D expensing and new limitations on clean energy credits, this legislation could significantly impact planning strategies for individuals, businesses, and multinationals alike.
CalCPA is here to help you navigate the changes. Explore our exclusive video series, in-depth resources, and expert insights to stay ahead of the changes and confidently guide your clients through what’s next. Stay tuned for the latest updates and insights!
Video Series
One Big Beautiful Tax Bill Series | 2025
The 2025 “One Big Beautiful” Tax Bill (OBBB) brings sweeping changes to the tax landscape, impacting individuals, small businesses, multinationals, and key industries across California. This multi-episode series breaks down the bill’s most significant provisions, with expert-led discussions designed to help CPAs and financial professionals understand what’s changing, what it means, and how to advise clients with clarity and confidence.
Jump to an episode: Episode 1, pt 1 | Episode 1, pt 2 | Episode 2 | Episode 3 | Episode 5 | Episode 6, pt. 1 | Episode 6, pt. 2 | Episode 7 | Episode 8 | Episode 9 | Episode 10
Episode 1, part 1: The Big Picture: Breaking Down the One Big Beautiful Tax Bill | What’s in the One Big Beautiful Bill?
Speaker:
Annette Nellen, CPA, Esq. | San Jose State University
This opening episode provides important context on the development of the 2025 tax bill and highlights key provisions practitioners should closely monitor. The session will cover items with retroactive effect, early termination dates, and distinctions between temporary and permanent changes. It will also offer insight into what’s currently omitted from the bill and what may still be under consideration for future legislation.
Episode 1, part 2: The Big Picture: Breaking Down the One Big Beautiful Tax Bill | Retroactive Tax Changes You Need to Know
Speaker:
Annette Nellen, CPA, Esq. | San Jose State University
Episode 2: Changes to Qualified Opportunity Zone
Speakers:
Annette Nellen, CPA, Esq. | San Jose State University
Blake Christian, CPA | HCVT
The 2025 tax bill brings important updates to the Qualified Opportunity Zone (QOZ) program, introducing new criteria, timelines, and targeted incentives that CPAs and investment professionals need to understand.
Episode 3: Navigating Itemized Deduction Changes in the 2025 Tax Bill
Speakers:
Join Troy Lewis, CPA, CGMA | BYU
Several smaller, but important, individual tax provisions were modified. This quick episode explores updates to itemized deductions, including mortgage interest, charitable contributions, casualty losses, and miscellaneous deductions.
Episode 5: New International Taxes
Speaker:
Krystle Owynn | Spott, Lucey & Wall, CPAs
Explore the bill’s international tax provisions, with a focus on the newly introduced “retaliation tax” targeting foreign-owned U.S. subsidiaries. Designed to curb base erosion and profit shifting, these changes carry significant implications for multinational clients and inbound structures—especially those operating in California. Advisors will gain practical insights to navigate the evolving international tax landscape.
Episode 6, pt. 1: Cuts to Clean Energy Tax Credits | Business-focused energy provisions
Speaker:
Barry Devine, MBA | Tri-Merit
Gain insights into the rollback of major clean energy tax incentives and its implications for California’s green economy. The discussion will cover the termination of key business investment credits, the repeal of credit transferability, and the broader impact on ESG investing, renewable energy developers, and commercial retrofits. CPAs will leave better equipped to advise clients navigating these significant changes.
Episode 6, pt. 2: Cuts to Clean Energy Tax Credits | Business-focused energy provisions
Speaker:
Barry Devine, MBA | Tri-Merit
Episode 7: Trump Accounts: Tax Advantages and Eligibility Explained
Speaker:
Mary Kay Foss, CPA
This session dives deep into the innovative MAGA/Trump Accounts introduced in the proposed tax bill. Learn about the structure, eligibility requirements, and unique tax benefits these accounts offer. Discover how Trump Accounts can serve as a powerful tool for individuals and businesses to enhance savings strategies and optimize tax planning under the new legislation.
Episode 8: Changes to the SALT Cap
Speaker:
Rebecca Stidham, CPA | Withum
Get a focused breakdown of the bill’s SALT cap changes and how they could benefit (or complicate) California taxpayers. Understand who qualifies for relief and how this intersects with PTET strategies.
Episode 9: Payroll & Paycheck Provisions: Labor and Employment Tax Updates
Speaker:
Susan K. Hatmaker | Hatmaker Law Group
A focused session on labor-related tax changes, including the bill’s “no tax” provisions on common wage supplements like tips and overtime. Employers and payroll professionals should take note.
Episode 10: Healthcare & Taxes—What’s Changing for Coverage and Credits
Speaker:
Chris Bell, CPA | Baker Tilly
Explore changes to the Premium Tax Credit, HSA contribution limits and eligibility, and tax provisions affecting Medicaid-related coverage.