Year-End Business Tax Planning Strategies for 2025: What Smart Companies Should Be Doing Now
By Cody C. Heimerdinger, CPA
As 2025 winds down, business owners face a rare opportunity, and a high-stakes challenge. The One Big Beautiful Bill Act (OBBBA) reshaped major areas of the tax landscape, with many provisions kicking in this year and next. Whether these changes translate into significant savings or costly surprises depends on how proactively you plan before December 31.We are always interested in helping clients navigate a new era of accelerated deductions, shifting entity incentives, and compressed timelines for valuable credits. Below are the key areas every business should review while there’s still time to act.
Maximize Asset Investments and Cost Recovery Opportunities
OBBBA reinstated 100% bonus depreciation for qualifying assets placed in service after January 19, 2025, while also expanding Section 179 expensing and allowing immediate deductions for certain production-related buildings. Combined, these changes can dramatically improve after-tax cash flow, but only with proper timing and documentation.
Key actions before year-end:
- Evaluate fixed asset purchases you’re already planning, accelerating them may yield full expensing.
- Consider a cost segregation study for new or existing real estate; the tax benefits are magnified under a 100% bonus environment.
- Revisit your repair vs. capitalization policies to ensure you are maximizing deductions legally available under the tangible property regulations.
The takeaway: If you plan to invest in equipment, technology, or property improvements, year-end may be the most valuable moment to pull the trigger.
Reassess Your Entity Structure Under the New Rules
Entity choice is one of the most powerful, and frequently overlooked, tax planning decisions. OBBBA further complicates (and enhances) the analysis by:
- Permanently extending the 20% pass-through deduction,
- Expanding qualified small business stock (QSBS) gain exclusions to potentially $15 million (or 10x basis, if greater),
- And adjusting certain C corporation provisions that may make corporate structures more appealing in specific scenarios.
Questions to consider:
- Is your current entity still the most tax-efficient for how your business operates today?
- If you’re an S corporation or partnership, does maintaining that status still optimize income rates, basis, and exit planning?
- If you operate as a C corporation, could you benefit from QSBS eligibility or revised compensation strategies?
Entity restructuring often requires lead time, so early analysis is essential.
Explore Accounting Method Opportunities to Manage Taxable Income
With interest rates elevated and several tax timing rules shifting under OBBBA, accounting method planning is once again a powerful tool for managing tax liabilities.
Potential opportunities include:
- Transitioning from accrual to cash method (if eligible),
- Using the one-year deferral method for advance payments,
- Accelerating deductions through prepaid expense rules,
- Revisiting inventory valuation methods, including lower-of-cost-or-market or simplified methods available to small businesses,
- Analyzing UNICAP methodologies to ensure you aren’t capitalizing more than required.
A method change can defer income, accelerate deductions, or both, often producing significant cash savings. Many changes qualify for automatic consent procedures, but they still require technical filings and year-end coordination.
Capture Credits and Incentives Before They Expire
Several energy credits and incentives are now subject to shorter construction start and completion deadlines. If your business is planning solar, wind, or other renewable energy investments, the window may be closing faster than expected.
Additionally, OBBBA restored the ability to currently expense domestic research and experimentation (R&E) costs, opening the door to multiple planning strategies:
- Amending prior returns,
- Taking a full deduction in 2025,
- Splitting deductions between 2025 and 2026,
- Or continuing amortization where advisable.
Modeling each option is essential, the impact on taxable income and cash flow can vary dramatically.
Strategically Time Year-End Payments
Some deductions are allowed only when paid, not when accrued. Others are allowed only if paid by a specific deadline.
This includes:
- Bonuses to employees or shareholders,
- Related-party payments,
- Certain service contracts,
- State and local tax prepayments (where appropriate),
- Professional fees and recurring expenses.
Thoughtfully timing these payments can shift deductions between years and help balance taxable income considering potential future rule changes.
Identify and Harvest Losses
As the year wraps up, it’s critical to review:
- Accounts receivable for potential bad debt deductions,
- Underperforming or worthless investments,
- Inventory for obsolescence or valuation adjustments.
A targeted loss-harvesting strategy can reduce your current-year liability while positioning your business for a stronger financial start to 2026.
Where Businesses Go Wrong – And How to Avoid It
In our work with closely held companies, we see three common year-end planning mistakes:
- Waiting too long. Many strategies require time for analysis, elections, appraisals, or legal restructuring.
- Not running projections. Tax planning without modeling is guesswork — often expensive guesswork.
- Focusing on only one year. The most effective planning considers 2025, 2026, and exit planning simultaneously.
Final Thoughts: 2025 Is a Pivotal Year
Between new incentives, restored deductions, and looming shifts in 2026, the months ahead offer a rare chance to materially reshape your business’s tax posture. For some companies, this is a once-in-a-decade opportunity. If you’d like a customized year-end planning session, Keystone CPAs can model the tax impact of various scenarios and help you implement the strategies that best fit your long-term goals.