By Harry Prabandham · Updated September 27, 2026
Equity Compensation
RSUs in an Acquisition: Vesting, Conversion, and Taxes
In an acquisition, the merger agreement decides if RSUs are cashed out, converted to buyer stock, accelerated, or cancelled; vesting is taxed as wages.
RSUs in an Acquisition: Vesting, Conversion, and Taxes
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The short answer
- When a company is acquired, the merger agreement and your equity plan decide what happens to your RSUs, not general custom.
- Vested RSUs are usually settled in cash or buyer stock; unvested RSUs are commonly converted into buyer awards, accelerated, cashed out on a schedule, or occasionally cancelled.
- Whenever RSUs vest or settle, their value is taxed as ordinary wage income, not as capital gains.
- Only growth after you receive the shares is capital gain or loss when you later sell.
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Full Guide
The short answer
- When a company is acquired, the merger agreement and your equity plan decide what happens to your RSUs, not general custom.
- Vested RSUs are usually settled in cash or buyer stock; unvested RSUs are commonly converted into buyer awards, accelerated, cashed out on a schedule, or occasionally cancelled.
- Whenever RSUs vest or settle, their value is taxed as ordinary wage income, not as capital gains.
- Only growth after you receive the shares is capital gain or loss when you later sell.
What can happen to unvested RSUs?
- Assumption or substitution: the buyer converts your awards into its own RSUs using an exchange ratio, usually keeping your vesting schedule.
- Cash conversion: unvested units become a cash award that pays out as the original vesting dates arrive, if you stay employed.
- Single-trigger acceleration vests awards at closing; double-trigger acceleration vests them only if you are also terminated without cause or resign for good reason.
- Plans may allow cancellation of awards the buyer does not assume, so read the plan and your grant agreement.
Does it matter if your company is public or private?
- At a public target, vested shares you already hold are typically exchanged for cash, buyer stock, or a mix at the announced price.
- At a private target, many RSUs are double-trigger, and the acquisition often satisfies the liquidity condition, making years of units taxable at once.
- Private deals frequently hold back part of the price in escrow or tie some value to future earnouts, which may never be paid.
- Buyer stock received in a private deal may be unregistered or subject to lockups, limiting when you can sell.
How are you taxed?
- Federal withholding on RSU income is often 22%, or 37% on supplemental wages above $1 million in a year, plus Social Security, Medicare, and state tax.
- For many high earners, 22% withholding falls short of the actual rate, so estimated payments or extra withholding may be needed.
- California withholds 10.23% on stock-based supplemental wages, which may also be below your actual state rate.
- Shares you already own: a cash deal is a taxable sale, while a stock-for-stock deal may qualify as a tax-deferred reorganization; confirm with a CPA.
Executives and large payouts
- Section 280G can impose a 20% excise tax on the recipient and deny the company's deduction for excess change-in-control payments.
- Payments may be cut back to stay under the 280G limit or, at private companies, approved by a shareholder vote.
- Retention packages from the buyer often come with new vesting schedules and clawbacks that deserve a careful read.
- Non-compete and non-solicit terms tied to deal payments can differ from ordinary employment agreements.
What decisions come after closing?
- Converted awards shift your concentration from your old employer to the buyer, a company you may know much less about.
- Trading windows and insider trading policies at the buyer apply once you become its employee.
- Many people compare the retention value of unvested awards with other career options before deciding whether to stay.
- Deciding how much buyer stock to keep is an investment decision separate from your job, with tax consequences for each sale.
Key takeaways
- Your merger agreement, plan, and grant documents control the outcome, so request and read them.
- RSU value is taxed as wages at vest or settlement, and default withholding may not cover the full bill.
- Private-company deals add escrows, earnouts, and sale restrictions that can change what you actually receive.
- This is general education, not tax or legal advice; confirm details with a CPA or employment attorney.
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