When a company whose stock you own gets bought out, your shares are converted into cash, stock in the acquiring company, or a combination of the two, usually at a price above where the stock was trading before the deal was announced. The exact payment, called the merger consideration, is set in the acquisition agreement. Whether you owe taxes right away or can defer them depends on what form that payment takes.
What You Actually Receive Per Share
The merger agreement spells out exactly what each shareholder gets for every share owned. That payment falls into one of three buckets.
All Cash
Every share converts into a fixed dollar amount at closing. If the agreement says $45.00 per share, that’s what you receive regardless of what happens to the acquirer’s stock price between the announcement and the closing date. The value is locked in the moment the terms are public.
All Stock
Your shares are swapped for shares of the acquiring company at an exchange ratio. A fixed ratio might convert each of your shares into 0.5 shares of the acquirer, in which case the dollar value you end up with moves with the acquirer’s stock price until closing. A floating ratio adjusts the share count to hit a target dollar value, giving you more price certainty. Either way, you walk away as a shareholder in the combined company instead of with cash.
Mixed Cash and Stock
Many deals combine the two. A typical structure might be $20.00 in cash plus 0.25 shares of the acquirer per share you own. The agreement often lets you elect all cash or all stock instead of the default split, but those elections are subject to proration: if too many shareholders pick cash, some of those requests get filled with stock so the overall payout stays within what the acquirer budgeted.
The Premium You Should Expect
Acquirers almost always pay more than the target’s pre-announcement trading price. Research covering decades of U.S. public-company acquisitions puts the average premium at roughly 30 to 40 percent above the stock price before the deal becomes public. That is why a target’s stock jumps sharply on announcement day. After the jump, the stock usually trades slightly below the offered price, and that small gap reflects the remaining risk that the deal falls through before closing.
The Timeline From Announcement to Closing
You still own your shares between the announcement and the closing date, and you can sell them on the open market if you would rather cash out early than wait. Most deals take several months to close because they need both shareholder approval and regulatory clearance. Straightforward acquisitions often wrap in three to six months. Deals that draw antitrust scrutiny from the DOJ or FTC can stretch well beyond that.
The Shareholder Vote
The target’s board sends shareholders a proxy statement filed with the SEC, laying out the deal terms and the board’s recommendation. Most mergers need a majority vote from the target’s shareholders. Some deals skip this step: when an acquirer already owns at least 90 percent of a subsidiary’s shares, it can complete a short-form merger with no shareholder vote at all.
How Your Shares Get Converted
A third-party financial institution called the exchange agent handles the mechanics. If you hold your stock through a brokerage account, the transition is automatic: your old shares disappear from the account and the cash or new shares appear within a few business days of closing. You don’t need to do anything.
If you still hold physical stock certificates, you’ll receive a Letter of Transmittal from the exchange agent. You need to complete that form and mail it back with your original certificates. The exchange agent won’t release your payment until both are in hand, so any delay here is a delay in getting paid.
Trading Stops and Open Orders Get Canceled
Once the deal closes, trading in the target’s stock stops. The formal delisting from Nasdaq or the New York Stock Exchange becomes effective 10 days after the exchange files Form 25 with the SEC, but as a practical matter you can no longer buy or sell the stock after the closing date.1Securities and Exchange Commission. Final Rule: Removal from Listing and Registration of Securities Pursuant to Section 12(d) of the Securities Exchange Act of 1934 Any open orders on the stock, including limit orders, stop-loss orders, and good-til-canceled orders, are automatically canceled when the corporate action takes effect. If you had a trailing stop set as a safety net, it’s gone. Check your account after the announcement so you aren’t relying on orders that will never fill.
Fractional Shares in a Stock Deal
Exchange ratios rarely produce whole numbers. If you own 75 shares and the ratio is 0.4, you receive 30 shares. Clean. But if you owned 77 shares, the math gives you 30.8 shares, and the acquirer isn’t going to issue eight-tenths of a share. You receive cash for the fractional piece, calculated at the market price of the acquirer’s stock around closing. The IRS treats that cash-in-lieu payment as a sale of the fractional share, so you recognize a small capital gain or loss on just that sliver.2Internal Revenue Service. PLR-100272-25 (Letter Ruling)
If You Never Claim Your Payment
If you don’t submit your Letter of Transmittal or your brokerage account is somehow unreachable, the money doesn’t vanish. The exchange agent holds unclaimed funds for a period specified in the merger agreement, often one to three years. After that window, the money is typically turned over to the acquiring company. Eventually, state unclaimed-property laws take over and the money escheats to the state where the shareholder was last known to reside. You can still recover it through the state’s unclaimed-property process, but the longer you wait, the more paperwork it takes.
What You’ll Owe the IRS
How much tax you owe depends on the form of consideration and how long you held the original shares. A cash buyout can trigger a substantial tax bill in the year the deal closes. A stock-for-stock deal may let you defer taxes indefinitely.
Cash Deals: Fully Taxable
An all-cash buyout is a straight sale for tax purposes. Subtract your cost basis (what you originally paid for the shares, plus any adjustments) from the cash you receive, and the difference is your capital gain or loss. Shares held more than one year qualify for long-term capital gains rates, which top out at 20 percent for the highest earners. Shares held one year or less are taxed at your ordinary income rate, which can be significantly higher.3Internal Revenue Service. Topic No. 409, Capital Gains and Losses
Your broker reports the gross proceeds on Form 1099-B. You use Form 8949 and Schedule D to calculate the actual gain or loss and report it on your return.4Internal Revenue Service. About Form 8949, Sales and Other Dispositions of Capital Assets If you bought shares in multiple lots at different times and prices, each lot is calculated separately.
Stock Deals: Often Tax-Free for Now
When you receive only stock in the acquiring company, the exchange often qualifies as a tax-free reorganization. Under Section 354 of the Internal Revenue Code, no gain or loss is recognized when you swap stock in one company for stock in another as part of a qualifying reorganization.5Office of the Law Revision Counsel. 26 U.S. Code 354 – Exchanges of Stock and Securities in Certain Reorganizations The deal must meet one of the structural tests in Section 368, which generally requires the acquirer to use its own voting stock and gain control of the target.6Office of the Law Revision Counsel. 26 U.S. Code 368 – Definitions Relating to Corporate Reorganizations
The benefit is deferral, not forgiveness. Your cost basis carries over to the new shares, and your holding period tacks on.7Office of the Law Revision Counsel. 26 U.S. Code 1223 – Holding Period of Property If you bought the original shares three years ago for $20 each, the new shares inherit that $20 basis and the three-year holding period. You won’t owe tax until you eventually sell the new shares.
Mixed Deals: Partially Taxable
When a deal pays you both cash and stock, the cash portion is called “boot” and triggers immediate gain recognition. Under Section 356, the gain you must recognize equals the cash received, capped at your total gain on the transaction.8Office of the Law Revision Counsel. 26 U.S. Code 356 – Receipt of Additional Consideration
Two examples show how that cap works. Say your cost basis is $10 per share and you receive $15 in cash plus $10 in stock, for a total value of $25. Your realized gain is $15 and the boot is $15, so you recognize the full $15. Change the numbers: same $10 basis, but you get $5 in cash and $20 in stock. Your realized gain is still $15, but you only received $5 in boot, so you recognize just $5. The remaining $10 of gain stays deferred in the new stock, and the basis of your new shares is adjusted under Section 358 to reflect the cash received and the gain recognized.9Office of the Law Revision Counsel. 26 U.S. Code 358 – Basis to Distributees Your broker will issue a 1099-B for the cash portion, but tracking the adjusted basis on the stock is on you.
One boundary worth knowing: if you owned a large or concentrated stake in the target, boot can sometimes be recharacterized as dividend income rather than capital gain under Section 356(a)(2). For a typical retail investor with a small position, this almost never applies, but a big holder should raise it with a tax professional.
If You Hold Employee Options or RSUs
Equity compensation adds complexity. Vested stock options and vested RSUs are generally treated like regular shares and convert into the merger consideration. The trickier question is what happens to unvested awards, and the answer lives in your grant agreement and the merger terms.
Common outcomes for unvested RSUs include:
- Accelerated vesting, where all unvested units vest at closing and you receive the merger consideration for those shares.
- Rollover to the acquirer, where your unvested RSUs convert into equivalent awards in the acquiring company’s stock and the original vesting schedule continues.
- Cash-out, where the acquirer pays you cash for the unvested units, sometimes at the deal price and sometimes at a discount, taxed as ordinary income in the year received.
- Cancellation with no payment, which is rare for employees the acquirer wants to retain but does happen.
Your grant agreement almost certainly has a change-in-control provision that specifies which outcome applies. Read it before the shareholder vote, not after. If your unvested RSUs accelerate and you’re also getting a large cash payout for your vested shares, the combined income in a single year can push you into a higher bracket, and it’s worth a conversation with a tax advisor before closing.
If You Think the Price Is Too Low
You aren’t forced to accept whatever the board negotiates. Appraisal rights let you ask a court to independently determine the “fair value” of your shares instead of accepting the merger price. The court’s number can come in higher or lower than the deal price, so it’s a genuine gamble. The process is governed by the corporate law of the state where the company is incorporated, and the procedural requirements are strict: you typically must deliver a written objection before the shareholder vote, vote against the merger or abstain, and then file a petition with the court within a tight deadline after closing.
Cost is the main deterrent for individual investors. Between legal fees, expert valuation witnesses, and a process that can drag on for years, appraisal is overwhelmingly a tool for institutions and hedge funds with enough shares to justify the expense. For most retail shareholders, selling on the open market before closing is the simpler exit if you’re unhappy with the price.
What to Do When a Buyout Is Announced
The announcement creates a window where you have choices, and doing nothing is a valid one if you’re comfortable with the terms. A few steps are still worth taking early. Read the merger agreement or at least the press release to see what kind of consideration you’re receiving and whether you have an election to make. Check whether you hold physical certificates, because those require action on your part. Review any open orders on the stock, since they’ll be canceled at closing. And if the deal includes stock consideration, take a hard look at the acquiring company, because you’re about to become one of its shareholders whether or not you’d have chosen to buy in on your own.