What Happens to My RSUs When My Company Is Acquired?

First: unvested and vested RSUs are different problems

Vested RSUs are shares you already own. In an acquisition they're treated like any other shareholder's stock — cashed out at the deal price, exchanged for acquirer stock, or some mix of both. You were taxed when they vested. What's left is a capital gains question.

Unvested RSUs are a promise. They have no value you can touch yet, and their fate is negotiated between the two companies. This is where nearly all the uncertainty lives, and usually where most of your paper wealth sits.

Before anything else, get a current statement from your equity administrator — Fidelity, Schwab, Shareworks, Carta — showing exactly what's vested, what's unvested, and each remaining vest date. Executives are consistently wrong about this by a meaningful margin, in both directions.

The three outcomes for unvested RSUs

1. Assumption and conversion

The acquirer takes over your unvested grant and converts it into RSUs of their own stock, using an exchange ratio from the deal terms. Your original vesting schedule normally carries over.

This is the most common outcome when a public company acquires another public company, and it is usually the best one — nothing accelerates, nothing is taxed at close, and you keep vesting.

The catch is a change in what you're exposed to. Your unvested wealth is now tied to a company you did not choose, whose business you may not know well, and whose stock may be materially more or less volatile than what you held. If the exchange ratio is unfavorable, or the acquirer is materially larger and slower-growing, the trajectory of that wealth changes even though the dollar figure at close looks the same.

2. Cash-out

The acquirer pays out your unvested RSUs in cash — sometimes at close, sometimes on the original vesting schedule as "deferred cash consideration."

Cash at close is simple and it is taxed as ordinary compensation income in the year it's paid. That last part is what catches people. A large cash-out stacked on top of a full year's salary and bonus can move you through brackets, trigger the additional Medicare tax, phase out deductions, and produce a bill far larger than the withholding covered.

Deferred cash on the original schedule spreads the income over several years, which is generally better from a tax standpoint — but it converts you into an unsecured creditor of the acquirer. If they run into trouble, you're in line with everyone else.

3. Acceleration

Vesting speeds up, typically to the closing date. The mechanism is usually one of two triggers:

Single-trigger acceleration means vesting accelerates on the change of control alone. Everything vests at close. This is rare below the executive level.

Double-trigger acceleration means two things must happen: the change of control, and your involuntary termination or a qualifying "good reason" resignation within a defined window afterward — commonly twelve or eighteen months. This is the standard for senior executives, and it exists because acquirers want to keep you.

If you have double-trigger protection, read the "good reason" definition carefully. It typically covers a material reduction in title, compensation, or responsibilities, or a relocation beyond a certain distance. In practice, this clause is what protects you when the acquirer quietly restructures your role six months after close. It is also the clause most often skimmed and least often understood.

The tax trap almost nobody sees coming

The single largest avoidable mistake we see is the collision of accelerated vesting with under-withholding.

Employers typically withhold on RSU vesting at the 22% supplemental federal rate. If a deal pushes you into the 35% or 37% bracket, you are under-withheld by 13 to 15 percentage points on the entire accelerated amount. On $2 million of accelerated RSUs, that's a gap somewhere between $260,000 and $300,000 — federal alone, before state.

That bill arrives the following April. By then the shares may be worth substantially less than they were at vest, and the tax is owed on the vest-date value regardless.

The fixes are unglamorous and they work: request additional withholding if your plan allows it, make an estimated payment in the quarter the income lands, or set aside the shortfall in cash the day the deal closes. All three require knowing the number before it happens — which is the actual argument for having the conversation months ahead rather than in March.

What you can still control

Once a deal is announced, the mechanics are largely fixed. These are the levers that remain:

Timing across tax years. If the deal closes near year-end, whether income lands in December or January can be worth six figures. You rarely control the closing date — but you can control other elections around it: charitable contributions, deferred compensation elections, the timing of option exercises, and loss harvesting elsewhere in the portfolio.

Concentration. Between announcement and close, your net worth is often 60% or more in one stock, and the deal may not complete. Deals break on financing, regulatory review, and shareholder votes. Whether — and how much — to reduce before close is a real decision, constrained by your trading window and any 10b5-1 plan already in place.

Charitable strategy. If you're charitably inclined, appreciated shares contributed before a deal closes can be far more efficient than cash given afterward. Donor-advised funds are the usual vehicle, and the timing rules are strict.

Your own employment. If you have double-trigger protection, understanding exactly what triggers it changes how you evaluate the role you're offered post-close. That is a financial decision as much as a career one.

The sequence that actually works

1. Pull your documents. Grant agreements, the equity plan document, your employment agreement, and any change-of-control or severance agreement. The answers are in these, not in the press release.
2. Read the merger agreement's treatment-of-equity section once it's available. It is specific, and it supersedes general expectations.
3. Build the tax projection before close, not after. Model the full year with the deal income included, and identify the withholding gap in dollars.
4. Decide the concentration question deliberately, inside your trading window.
5. Coordinate the three advisors. Your CPA sees the tax year. Your attorney sees the agreement. Neither is sequencing the whole thing across both. Somebody has to.