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Mergers & Acquisitions: Key Tax Factors Every Buyer and Seller Must Know

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When you’re planning to sell your business or acquire another company, taxes can significantly affect both the structure and financial outcome of the deal. Understanding the potential tax implications early can make the difference between a smooth transaction and costly surprises.


Asset Sale vs. Stock Sale

From a tax perspective, mergers and acquisitions are typically structured as either asset sales or stock sales, and each approach creates very different tax results for buyers and sellers.

Asset Sales

In an asset sale, the buyer acquires specific assets of the business. This structure is common when:

  • The buyer wants only certain assets or product lines
  • The business being sold is a sole proprietorship
  • The company is a single-member LLC taxed as a sole proprietorship

Stock Sales

If the company is structured as a corporation, partnership, or an LLC taxed as a partnership, a buyer may instead purchase the seller’s ownership interest (such as corporate stock or partnership units).

Whether the business is a C corporation or a pass-through entity (S corporation, partnership, or LLC) plays a major role in determining the tax results.

Tax Rates and Entity Type

The flat 21% federal corporate tax rate under the Tax Cuts and Jobs Act (TCJA) — unchanged by the One Big Beautiful Bill Act (OBBBA) — makes purchasing the stock of a C corporation potentially more appealing to buyers. Why?

  • The corporation pays less tax and retains more after-tax income
  • Built-in gains on appreciated assets are taxed at a lower rate when sold

Additionally, the TCJA’s lower individual tax rates, made permanent by the OBBBA, enhance the appeal of pass-through entities. Buyers of S corporations, partnerships, and LLCs may also benefit from the qualified business income (QBI) deduction, assuming they qualify.

Note: In certain situations, a buyer can treat a stock purchase as an asset purchase by making a Section 338 election. Contact us if you’d like to explore whether this option may benefit your transaction.


Tax Considerations for Buyers and Sellers

Why Sellers Prefer Stock Sales

Sellers generally lean toward stock sales because:

  • They usually result in lower overall tax liability
  • Gains are typically taxed at favorable long-term capital gain rates
  • Business liabilities generally transfer to the buyer
  • The transaction tends to be simpler from a non-tax standpoint

Why Buyers Prefer Asset Purchases

Buyers often choose asset purchases to maximize future cash flow and reduce risk. Key advantages include:

  • Limiting exposure to unknown or undisclosed liabilities
  • Increasing the tax basis (step-up) of acquired assets
  • Reducing future taxable gains on asset sales
  • Increasing depreciation and amortization deductions on qualifying assets

A stepped-up basis is particularly valuable for assets such as receivables, inventory, and equipment.

Other Tax Areas to Watch

Employee benefit plans, retirement accounts, deferred compensation, and other HR-related items can introduce unexpected tax complications. A thorough due diligence review is essential.


We Can Help You Navigate the Tax Impact

Selling a business you’ve built or buying one for the first time may be the most significant financial decision of your life. Before negotiations begin, we can help you evaluate the tax consequences and avoid unpleasant surprises after the transaction closes.
Contact us to get started.

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California Forensic CPA