Tax Considerations in M&A

Tax changes the price, the seller's proceeds, the funding, the integration plan, and the cash the business generates after closing. CorpDev's job is to put those effects in front of decision makers early enough to shape the deal. Compare structures on headline price alone, and the wrong one can look better to both the investment committee and the seller.

Use this guide to organize the work with qualified tax advisers, who own the conclusions. The discussion of elections uses US federal tax context. Entity classification, ownership, jurisdiction, and the actual transaction determine the treatment.

Build the buyer's and the seller's numbers side by side

Build two views. The buyer view shows what the deal costs and the after-tax cash flows it brings. The seller view shows what the seller keeps after tax. Reconcile them before agreeing economic terms. A structure that helps the buyer can cost the seller more, and the extra price needed to make up that cost may itself be taxed.

The table pairs each buyer question with its seller counterpart and the evidence both need.

The tax lead keeps a structure comparison. For each option, it records the assumptions and evidence gaps, the effect on value, and the elections, deadlines, and owners the option depends on. CorpDev builds the results into the investment case and the negotiation.

Confirm the tax treatment instead of inferring it from legal form

A stock purchase in law does not always get the tax result of an ordinary stock purchase. An LLC is a legal form; its name does not tell you how it is classified for tax. Ask advisers to confirm the treatment.

In a taxable purchase of a business's assets, the way the price is allocated among the assets affects the buyer's tax basis and the character of the seller's gain. The IRS explains that a business sale generally involves separate assets, and that the price must be allocated under the applicable rules. Sales of stock and of partnership interests raise different questions. See the IRS guide to the sale of a business.

Avoid rules of thumb such as “an asset sale is better for the buyer” or “a stock sale is always better for the seller.” Reach a conclusion only from the actual model, weighing these together:

• Tax basis and the timing of deductions
• Use of losses, and entity-level tax
• Transaction costs, and who bears which liabilities
• Consent requirements

Check eligibility before counting on a section 338(h)(10) election

A section 338(h)(10) election lets a deal stay a stock purchase in law while it is treated as a deemed sale of assets for relevant federal tax purposes. It can apply to certain qualified stock purchases involving eligible targets and sellers, including an S corporation or a member of a selling consolidated group. It is a joint election with specific requirements.

An LLC target is not automatically eligible. Check each party's eligibility and the S-corporation shareholder consent requirements, which include shareholders who do not sell. The IRS Form 8023 instructions describe eligibility, signing, and filing requirements.

Before the election becomes part of the agreed economics, get adviser confirmation of:

• Eligibility and the consents required
• The expected tax cost and benefit, and the allocation approach
• State tax treatment
• Who files, and what cooperation the contract must require

Consider other structures only once their own eligibility and economics are established.

Work out what it really costs to make the seller whole

Hypothetical negotiation, not a tax-rate assumption: A proposed structure adds $5 million to the seller's tax compared with the alternative. The buyer estimates $10 million of additional present-value tax benefits from it. Offering $3 million more does not make the seller whole. Even before tax on that $3 million, the seller is still $2 million worse off.

The extra price is itself taxed. If each additional dollar is taxed at an assumed marginal 25%, a simplified gross-up is:

Extra price needed  = Additional seller tax / (1 − tax on the extra price)
                    = $5.0m / (1 − 25%)
                    = $6.667m

Benefit left for the buyer = $10.0m − $6.667m
                           = $3.333m before other costs and changes

The example holds the buyer's benefit fixed. A real model may need to recalculate basis, allocation, deductions, seller tax, and financing effects as the price changes. Have the tax lead validate the mechanics, and negotiate from a sensitivity range rather than one point estimate.

Value tax benefits as cash you can actually use

A tax benefit is worth the present value of the cash tax it actually saves. That is neither the face value of an accounting asset nor the total of the deductions. Model:

• When each deduction arises
• Whether there will be taxable income to use it
• Limits, expiry dates, and local rules
• The basis for discounting

Keep the tax-benefit schedule linked to the operating model. Never add a separate “tax synergy” to enterprise value if the same savings already lower the forecast cash taxes. Show the original assumption, the case your advisers support, and a downside in which timing or usage slips.

Turn the structure options into priced questions for advisers

A first adviser meeting that opens with “what should we be thinking about?” spends expensive time on orientation. A better opening is a short list of questions, each tied to a number in your model and to a decision the answer would change. Advisers can then spend the meeting on the answers.

List each model input that depends on a tax conclusion. Have finance calculate the effect of alternative treatments in the workbook. Ask the tax advisers to determine eligibility, rates, and treatment before those assumptions reach the committee.

A hypothetical example based on the gross-up example above:

Send the list to the advisers before the meeting. As each answer comes back, replace the flagged assumption in the model and record the adviser and the date.

The check that matters: every flagged placeholder is resolved before the tax section of the committee paper is written, because a question never asked leaves a guess in the approved case.

Aim tax diligence at exposures that change the deal

Tax diligence earns its cost when each finding leads to a change in price, protection, or plan. The table shows what to ask each specialist and what the answer can change.

Keep adviser conclusions separate from management's assertions. Record a significant unresolved position as a condition of the decision, not as a footnote buried in the diligence report.

Write each tax finding into the agreement

Build a negotiation schedule. For each tax issue, list the estimated range, the recommended contract treatment, the responsible adviser, and the open position. Depending on the deal, the agreement may need to address:

• Periods before closing, and straddle periods that span the closing date
• Refunds and control of tax audits
• Access to records and cooperation
• Elections, allocations, and survival of or limits on claims

A representation does not remove the cash or operating consequences of an issue. Judge what you could actually recover, given limits and exclusions, the other side's ability to pay, any insurance terms, and the cost of pursuing a claim.

Hand over a tax calendar at closing

Before signing, list every consent, filing, election, payment, and cooperation obligation the structure depends on. At closing, hand that calendar to the tax and finance owners, together with the final agreement, the allocation assumptions, contact details, and source records.

Integration can change the tax result. Require a tax review before you:

• Move intellectual property
• Refinance entities or change intercompany arrangements
• Combine operations
• Liquidate entities

Treat this implementation work as part of the investment, not as administrative cleanup.

Give the committee a tax decision, not a tax opinion

The tax section of the approval paper should support one clear decision. It covers:

• The preferred structure and the alternatives considered
• Buyer economics and seller economics
• Material exposures and required consents
• Conditions to proceed

Attach the technical analysis rather than turning the committee paper into a tax opinion.

Continue with deal structure, earnouts, and business case development.