If a company you own shares in is sold, your shares are converted into whatever the purchase agreement says you’ll receive: cash, stock in the buyer, or some mix of the two. The deal structure dictates the mechanics (whether you sell directly, swap for new equity, or wait for the selling company to distribute proceeds), and the tax that follows depends on what you got, how long you held, and whether your stake came from a purchase, an option exercise, or an equity grant. Employees holding options or restricted stock units face a separate set of outcomes, because those instruments can be cashed out, rolled into new grants at the acquirer, or accelerated on a schedule you don’t control.
How the Deal Structure Decides What Happens to Your Shares
Three legal structures cover most acquisitions, and each one touches your shares differently.
Stock Purchase
The buyer purchases shares directly from existing shareholders. The company keeps existing, usually as a wholly owned subsidiary of the acquirer. You hand over your shares and receive the agreed payment at closing, minus anything held back in escrow or subject to post-closing adjustments.
Asset Purchase
The buyer acquires specific assets and liabilities, not the shares themselves. Your shares remain outstanding in the selling entity, which is now a shell sitting on cash. The board then decides how to distribute that money, typically through a dividend or a formal dissolution. Your payout can be delayed weeks or months while the company settles remaining debts and winds down.
Statutory Merger
In a statutory merger, the target is absorbed into the buyer (or a buyer subsidiary) and stops existing as a separate entity. The merger agreement states exactly what each share converts into, and the conversion happens automatically by operation of state law once the merger closes.1Justia. Delaware Code Title 8 – 251 Merger or Consolidation of Domestic Corporations You don’t have to do anything, and you can’t opt out of the conversion terms (though you may have appraisal rights, discussed later).
A variation: the short-form or “squeeze-out” merger. Once a buyer owns at least 90% of the stock, most state laws let it merge the target into itself without a shareholder vote, and minority holders receive whatever the merger terms specify.2Justia. Delaware Code Title 8 – 253 Merger of Parent Corporation and Subsidiary This commonly follows a successful tender offer.
Tender Offer Plus Back-End Merger
If your shares trade publicly, the deal often starts with a tender offer: the buyer publicly announces a per-share price (usually above the current market price) and you choose whether to sell during the offer window. You can withdraw tendered shares before the offer expires.
Most public deals pair the tender offer with a back-end merger. Once enough shareholders tender to meet the minimum acceptance threshold, the buyer closes the offer and runs a merger to sweep up the rest at the same price. If you didn’t tender, your shares still get converted in the follow-up. The main difference is timing: shareholders who tender get paid first.
Cash, Stock, or Both
The purchase agreement specifies payment in one of three forms, and the choice affects your liquidity, your ongoing risk, and your tax bill.
- Cash: a fixed dollar amount per share at closing. Clean and final, but it triggers an immediate taxable event.
- Stock in the acquirer: your old shares convert into shares of the buying company, so your payout now depends on how that stock performs. This can qualify for tax deferral if the deal meets IRS reorganization requirements.
- Mixed: a combination. Many deals set a fixed split; others let shareholders elect their preferred mix within overall limits. The cash portion is typically taxable even when the stock portion defers.
If You Hold Options or RSUs Instead of Shares
Equity compensation is handled according to the terms of your equity plan and the deal documents, and the outcomes differ sharply by instrument.
Stock Options
If your options are in the money (the deal price exceeds your exercise price), the most common treatment is a cash-out: the buyer pays you the spread between the deal price and your exercise price, minus tax withholdings, with no exercise required on your part.
Alternatively, the buyer may convert unvested options into equivalent options in the acquiring company, preserving your vesting schedule but shifting the underlying stock. Some deals accelerate vesting on all outstanding options, giving you the chance to exercise before or at closing.
Out-of-the-money options, where the exercise price exceeds the deal price, are typically cancelled for no payment.
Restricted Stock Units
RSUs in private companies frequently use “double-trigger” vesting. The first trigger is the change of control itself. The second is your termination without cause within a specified window after closing, often 12 to 18 months. Both must fire for your RSUs to accelerate. If you stay employed and no termination occurs, the RSUs may convert into equivalent awards at the acquirer and keep vesting on their original schedule.
Some plans use single-trigger acceleration, where all outstanding RSUs vest immediately on the change of control. The difference between single-trigger and double-trigger can be worth tens or hundreds of thousands of dollars, so read your equity agreement carefully.
Restricted Stock With an 83(b) Election
If you hold actual restricted shares (not RSUs) and filed an 83(b) election within 30 days of the grant, you already paid ordinary income tax on the stock’s value at grant. When the acquisition closes, the spread between the deal price and the value you reported is taxed at long-term capital gains rates, assuming you’ve held the stock more than a year.
Why the Headline Price Isn’t Your Per-Share Payout
The announced acquisition price rarely equals what common shareholders pocket per share. Several claims come out of the total before common stock sees a dollar.
Outstanding debt and transaction costs (legal fees, investment banking fees, advisor costs) are subtracted first. Then preferred stockholders receive their liquidation preferences. In a venture-backed company, preferred investors typically have the right to get their original investment back (sometimes at a multiple) before common holders receive anything. What happens next depends on whether the preferred is participating or non-participating:
- Non-participating preferred: holders choose between taking their liquidation preference or converting to common and sharing in the total proceeds. They pick whichever is worth more, but they don’t get both.
- Participating preferred: holders receive their liquidation preference first and then also share in the remaining proceeds alongside common holders. This meaningfully reduces the common per-share payout, especially in smaller exits.
A $100 million acquisition sounds impressive, but after debt payoff, transaction expenses, and, say, $40 million in liquidation preferences, the pool available for common stock may be far smaller than expected. If you hold common shares or options in a venture-backed company, ask for the capitalization table and the liquidation waterfall before closing so you can estimate your actual payout.
Money Held Back After Closing
Even after the deal closes, you may not receive your full payout right away. Buyers routinely hold back part of the price as insurance against post-closing problems.
Escrow
A third-party escrow agent holds a portion of the price, typically 5% to 15% of the total deal value, for 12 to 18 months after closing. The fund covers the buyer if the seller’s representations in the purchase agreement turn out to be inaccurate. If no claim is filed during the escrow period, the funds release to shareholders on a pro-rata basis. If a claim is filed, some or all of the escrow may go to the buyer instead.
Holdbacks
Holdbacks work like escrow, except the buyer retains the funds directly rather than using a third-party agent. They usually cover specific post-closing adjustments such as working capital reconciliation. Amounts are smaller and resolved faster than escrow.
Earnouts
An earnout makes part of your payout contingent on the company hitting performance targets after closing, often tied to revenue or EBITDA milestones over one to three years. Buyers propose earnouts when there’s a gap between what they think the company is worth and what the seller wants. From the shareholder’s side, earnout payments are genuinely at risk: they depend on business performance that the buyer now controls, and if the buyer restructures, cuts spending, or integrates in a way that depresses the target metrics, you may receive nothing and have limited recourse.
For tax purposes, earnout payments are reported under the installment method. You recognize gain only in the year each payment is received, not the year of the original sale.3Internal Revenue Service. Publication 537, Installment Sales
What You’ll Owe in Tax
The tax hit from a sale can range from manageable to severe depending on how the deal is structured, what you held, and how long you held it.
Capital Gains Versus Ordinary Income
Shares held more than one year produce long-term capital gain, taxed at preferential rates.4Internal Revenue Service. Topic No. 409, Capital Gains and Losses For 2026, the long-term rate is 0% on taxable income up to $49,450 for single filers ($98,900 for joint filers), 15% above those thresholds, and 20% on income above $545,500 single ($613,700 joint).
Shares held one year or less produce short-term capital gain, taxed at your ordinary income rate, which can reach 37%.4Internal Revenue Service. Topic No. 409, Capital Gains and Losses
Equity compensation changes the picture. Proceeds from non-qualified stock options or vesting RSUs are taxed as ordinary income to the extent they represent compensation. The spread between fair market value and exercise price is treated as wages, subject to federal income tax withholding and FICA.5Internal Revenue Service. Topic No. 427, Stock Options
The 3.8% Net Investment Income Tax
High-income shareholders face an additional 3.8% surtax on capital gains. The Net Investment Income Tax applies if your modified adjusted gross income exceeds $200,000 (single) or $250,000 (married filing jointly).6Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax A large acquisition payout will almost certainly push you over those thresholds, so the effective top long-term rate is 23.8%, not 20%.7Internal Revenue Service. Find Out if Net Investment Income Tax Applies to You
Cost Basis
Your cost basis is what you originally paid for the shares, including commissions and fees. The IRS subtracts this from your sale proceeds to calculate the taxable gain. If you acquired shares at different times and prices, each block has its own basis and holding period. Track this carefully. If you can’t document your basis, the IRS treats your entire sale proceeds as taxable gain.
Stock-for-Stock Deals and the Boot Rule
When the deal is a stock-for-stock exchange that meets the IRS definition of a tax-free reorganization, you don’t owe tax at the time of the swap.8Office of the Law Revision Counsel. 26 USC 354 – Exchanges of Stock and Securities in Certain Reorganizations Your original basis carries over to the new shares and you pay tax only when you eventually sell the acquirer’s stock. The gain at that point is still measured from your original basis, so the tax is deferred, not eliminated. Qualifying reorganizations include statutory mergers and acquisitions conducted solely or primarily for voting stock of the acquirer.9Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations
If you receive cash alongside stock in an otherwise tax-free reorganization, the cash portion (called “boot”) is taxable. The taxable amount is limited to the lesser of the boot received or your total realized gain, and depending on the circumstances the IRS may treat some or all of it as dividend income rather than capital gain.10Office of the Law Revision Counsel. 26 USC 356 – Receipt of Additional Consideration
Qualified Small Business Stock Exclusion
If you held shares in a C corporation with gross assets under $50 million when the stock was issued, you may qualify for the Section 1202 exclusion, which can eliminate federal tax on up to $10 million in capital gains per company (or ten times your adjusted basis, whichever is greater).11Office of the Law Revision Counsel. 26 USC 1202 – Partial Exclusion for Gain From Certain Small Business Stock
The rules changed significantly for stock acquired after July 4, 2025, under the One Big Beautiful Bill Act. The exclusion is now tiered by holding period:
- Three years: 50% of gain excluded
- Four years: 75% of gain excluded
- Five or more years: 100% of gain excluded
The per-issuer cap also increased to the greater of $15 million (indexed for inflation starting in 2027) or ten times your adjusted basis for stock acquired after July 4, 2025. Stock acquired before that date is still governed by the prior rules, which required a five-year holding period for any exclusion.11Office of the Law Revision Counsel. 26 USC 1202 – Partial Exclusion for Gain From Certain Small Business Stock
For startup employees, this can be the single most valuable tax benefit available in an acquisition. The catch: you must have held the stock (actual shares, not options or RSUs) for the required period, and the company must have qualified as a small business at issuance. If you exercised options and held the resulting shares, the holding period starts at the exercise date.
When You Actually Owe the Tax
You owe tax in the year you actually receive the money, which may not be the year the deal closes. Cash released from escrow is taxable in the year of release. Earnout payments are taxable in the year each milestone is met and payment is made.12Internal Revenue Service. Topic No. 705, Installment Sales A single acquisition can create tax obligations spread across two, three, or even four tax years.
If you receive a large cash payout at closing, you’re responsible for estimated quarterly tax payments on the gain. Skip them and you’ll owe underpayment penalties. The estimated obligation is based on your net gain after subtracting cost basis, and the first payment is due in the quarter you receive the proceeds.
If You Think the Price Is Too Low: Appraisal Rights
If you believe the acquisition undervalues your shares, most states give you the right to demand a judicial appraisal. Instead of accepting the deal terms, you petition a court to determine the “fair value” of your shares and receive that amount.
The procedural requirements are strict and vary by state. You generally must notify the company of your intent to seek appraisal before the merger vote, you must not vote in favor of the merger, and you must file a formal demand with the surviving company after the merger closes.13Justia. Delaware Code Title 8 – 262 Appraisal Rights
Public company shareholders face an important limitation. Under Delaware law and similar statutes elsewhere, appraisal rights are generally not available if your shares were listed on a national securities exchange or held by more than 2,000 shareholders at the record date, on the logic that the public market already provides a reliable valuation. The exception: appraisal rights are restored if the deal requires you to accept something other than cash, listed shares, or shares held by more than 2,000 holders in the surviving company.
Appraisal proceedings are expensive, slow, and uncertain. Courts can find that fair value is higher, lower, or equal to the deal price. This is a tool for shareholders with enough at stake to justify litigation, not a routine response to a below-expectations offer.