Top 5 Year-End Tax Planning Moves Before 2026: What Businesses & Individuals Should Know

Dec 01, 2025

As we approach the end of the year—and as major tax law changes begin to take effect—it’s critical for both businesses and individuals to take stock of evolving tax provisions. The recent updates from the 119th Congress, as detailed in William Vaughan Company’s 2025 Year-End Tax Planning Webinar, contain significant opportunities and pitfalls. Smart planning now can unlock growth, mitigate risks, and ensure you’re maximizing every available benefit.

Below, we break down the top 5 tax planning considerations you should address before 2026:

1. Leverage Bonus Depreciation and Expensing Changes – for businesses:

  • Immediate expensing is available for property with a class life of 20 years or less, placed in service after January 19, 2025.
  • Qualified Production Property: Eligible manufacturers who place qualifying real property in service between July 4, 2025 and December 31, 2030, may benefit from accelerated depreciation on this property. This property must meet several specific requirements in order to qualify.
  • State Tax Considerations: For certain states (Michigan in particular), Individuals and flow-through entities must use IRC rules as of 12/31/24 for bonus depreciation, which continues the planned phase-outs and limitations as outlined in the Tax Cuts and Jobs Act of 2017.

Action Step: Review capital expenditure plans now. Accelerate purchases or construction to maximize deductions under the current, more favorable rules.

2. Prepare for Beneficial Changes to Interest Expense Limitations
What’s changing:

  • Starting January 1, 2025, businesses subject to Section 163(j) interest expense limitations can calculate their amount of limited interest expense based on their EBITDA. Previously, Depreciation & Amortization could not be added back in this calculation, which resulted in less allowed interest expense.
  • Starting January 1, 2026 any interest capitalized as additional tax basis to an asset must be broken out of that assets depreciation and subjected to the 163(j) limitations as if it were not part of depreciation.
  • Michigan businesses: Recent decoupling from federal rules means separate treatment for business interest deductions.

Action Step: Conduct a Section 163(j) analysis to determine if upcoming changes in the limitations will impact your financing structure or projected taxable income.

3. Understand and Optimize Research & Experimental Expenditures (Section 174)
Significant changes to Section 174, governing Research and Experimental (R&E) expenditures, have a direct impact on businesses engaged in innovation, product development, or process improvement. Here’s what you need to know:

Recent Legislative Updates

  • Pre-2022: Businesses could elect to deduct R&E expenses in the year incurred.
  • 2022–2024: R&E costs had to be capitalized and amortized (generally over five years for domestic and fifteen years for foreign expenditures).
  • Post-2024 (Starting in 2025): Businesses may once again elect to deduct R&E expenses in the year incurred (except foreign expenses, which remain subject to 15-year amortization)

Strategic Planning Opportunities

  • Previously Amortized Costs Going Forward:
    • For 2025, all businesses can elect to expense all prior years unamortized R&E costs in the current year or choose to expense half in 2025 and the remaining half in 2026.
    • If your business has less than $31 million in gross sales on average over the last 3 years, the new law allows for amending prior returns. I.e. you may go back and expense R&E costs in the year they were incurred and claim refunds. The deadline to amend these returns is generally by July 6, 2026, a much shorter timeframe than typically allowed for amendments.
  • Michigan Decoupling:
    • The state now decouples from federal rules on Section 174A (R&E expenses), in addition to Section 163(j), Section 179, and bonus depreciation provisions (Sections 168(n) & 168(k)), after Michigan’s latest budget package passed (H.B. 4961, signed 10/7/25).

Action Steps for Businesses

  • Review your current and planned R&E activities.
    • Evaluate whether you should accelerate R&E spending into 2025 to maximize immediate deductions.
    • Determine if you are eligible to amend prior year returns and evaluate whether you should do so, in order to meet the fast-approaching deadline.
    • Coordinate with tax advisors to track eligible expenditures and ensure compliance with both federal and state rules.
  • Individuals & Flow-Through Entities:
    • Between section 174A, 163(j) and 168(k) taxable income may be down in 2025 compared to prior years. If you are an S-Corporation, be sure to consider your stock basis and the deductibility of losses when making key decisions for 2025.
    • Also consider making a Roth conversion to take advantage of lower tax brackets if income is lower due to 2025 tax law changes.

4. Maximize Individual Deductions and Credits Before Phase-outs
Standard deduction increases (effective 2025):

  • Single: $15,750
  • Married Filing Jointly: $31,500
  • Additional $6,000 for taxpayers 65+ (phase-outs apply).

Other highlights:

  • State and Local Tax (SALT) cap: $40,000 for 2025-2029, then drops to $10,000 in 2030 (phase-outs apply).
  • Mortgage insurance premiums: Deductible from 2026.
  • Charitable deduction for non-itemizers: Up to $2,000 for joint filers from 2026.
  • Child Tax Credit: Increased and inflation-adjusted.
  • Charitable donations for itemizers: Deductions will be limited for taxpayers in the maximum tax bracket of 37% at 35%. Donations will also be subject to a floor of 0.5% of the taxpayers taxable income beginning in 2026.

Action Step: Bunch deductions: Consider timing charitable giving, SALT payments, and other deductions to optimize their tax impact before stricter caps and limitations set in. Consider making large doner advised fund (DAF) donations in 2025 to take advantage of the deductions before the new limitations take effect.

5. Estate & Gift Tax Planning

  • Exemption increases to $15M in 2026 (from $13.99M in 2025).
  • Annual gifting limit: $19,000 in 2025, inflation-adjusted for 2026.
  • Portability remains for spouses.

Action Step: Review your estate plan: High-net-worth individuals should review gifting strategies and trusts now that we have some certainty in the annual and lifetime limits.

Why Proactive Planning Matters
With so many provisions phasing in and out, proactive tax planning is essential. The coming years will see the continuance of many prominent TCJA provisions, new deductions, and complex interactions between federal and state rules. William Vaughan Company is here to help you navigate these changes, optimize your tax position, and ensure compliance.

Connect with Us.
Ruben Becerra, CPA – ruben.becerra@wvco.com
Chad Gates, CPA – chad.gates@wvco.com

Categories: Tax Planning