Double-Trigger RSU: The Complete Guide

A double-trigger RSU is a Restricted Stock Unit that requires two separate conditions to be satisfied before shares are delivered to you and before any tax is owed. The first trigger is time-based vesting — you stay at the company long enough to earn the RSU. The second trigger is a liquidity event — the company completes an IPO, acquisition, or other qualifying exit. Only when both conditions are met does the taxable delivery of shares occur.

The double-trigger structure is the standard design for RSUs at private companies, and understanding both triggers in detail — what each requires, what happens if either is never satisfied, and how the two interact — determines whether the RSUs in your offer letter represent real compensation or a contingent promise that may never pay out.

Why Double-Trigger Exists

The problem double-trigger solves is straightforward: ordinary income tax is owed when RSU shares are delivered. At a public company, shares can be sold immediately to fund the tax bill. At a private company, there is no liquid market — selling shares to cover taxes is typically not an option.

A single time-based trigger at a private company would create tax liability at each vest date on shares worth real money at the 409A FMV, payable in cash, with no mechanism to fund that payment. Double-trigger defers everything — the delivery of shares, the recognition of ordinary income, and the resulting tax bill — until a liquidity event creates the ability to sell.

Facebook popularized this structure in the years before its 2012 IPO. It is now the market standard at Series B and later private companies. See RSU in Private Companies: How They Work and Why They're Different for the full context.

Trigger 1: Time-Based Vesting

The first trigger is the same as any other equity grant: you must work at the company for a specified period. The standard schedule for employees is 4 years with a 1-year cliff: nothing vests in the first 12 months, then 25% vests at the cliff, and the remainder vests in equal monthly or quarterly increments over the following 3 years.

Time-based vesting creates what the IRS calls a "substantial risk of forfeiture" — you could lose the RSUs if you leave before vesting is complete. This risk of forfeiture is what allows the IRS to defer taxation until delivery.

Satisfying the time-based trigger does not deliver shares. It simply means you have met the first condition. You hold fully time-vested RSUs — but you hold a promise, not shares — until the second trigger is also met.

See Vesting Schedule: How Startup Equity Vesting Works for how standard vesting schedules work, what acceleration provisions look like, and what non-standard terms to watch for.

Trigger 2: The Liquidity Event

The second trigger is the company completing a qualifying liquidity event. What qualifies varies by grant agreement, but typically includes:

IPO (Initial Public Offering). The company lists its shares on a public exchange. This is the most common and most widely anticipated second trigger. At IPO, all time-vested RSUs settle simultaneously — shares are delivered, ordinary income is recognized, and taxes are withheld.

Acquisition or merger (change of control). The company is acquired by another company. In most acquisitions, time-vested RSUs settle in connection with the closing of the deal. Unvested RSUs may be assumed by the acquirer, cashed out, or accelerated depending on the acquisition terms.

Tender offer or secondary transaction (if included in the plan). Some companies add company-sponsored tender offers or approved secondary market transactions as qualifying liquidity events. This allows partial settlement before a full exit. Not all plans include this — check your grant agreement.

What does NOT qualify: A new funding round, a change in 409A valuation, a secondary sale by a founder, or any other event that does not constitute a full company-level liquidity event. Employees sometimes assume that because the company raised at a high valuation, something must have happened to their RSUs. Nothing has — until a qualifying liquidity event occurs.

How Both Triggers Work Together: Four Scenarios

Scenario A — Time vesting completed, then IPO.
You fully vest your RSUs over 4 years. Two years later, the company IPOs. At IPO, your fully vested RSUs deliver immediately. Ordinary income = FMV at IPO × number of RSUs.

Scenario B — IPO occurs before full time vesting.
You have been at the company for 18 months (25% time-vested at the cliff, then monthly vesting). The company IPOs. Your time-vested RSUs (roughly 37.5%) deliver at IPO. Unvested RSUs continue vesting on the original schedule and deliver at each future vest date as the conditions continue to be met post-IPO.

Scenario C — You leave after full time vesting, before liquidity event.
You work for 4 years and fully time-vest your RSUs, then leave. Whether your RSUs eventually pay out depends on your plan: some plans require active employment at the time of the liquidity event ("must be present to win") — your RSUs are forfeited when you leave. Other plans allow departed employees to retain time-vested RSUs and receive shares at the eventual liquidity event. This term is critical to verify before accepting any RSU grant.

Scenario D — Neither trigger is ever fully met.
The company never reaches a liquidity event within the RSU term. The RSUs expire worthless. You receive nothing despite potentially years of service. This is a real outcome at private companies that fail, remain private indefinitely, or are restructured.

The 7-Year Expiration

Double-trigger RSUs do not last forever. Most private company RSU plans set a maximum term — typically 7 years from the grant date — after which RSUs expire and are forfeited regardless of vesting status or circumstances.

The reason is structural: RSUs must have a "substantial risk of forfeiture" to defer taxation. An RSU that can never be forfeited — because the company promises eventual settlement no matter how long it takes — arguably does not have sufficient forfeiture risk, which could make all time-vested RSUs immediately taxable under the IRS view. Setting a firm expiration date preserves the deferral.

The Stripe precedent. In the years before Stripe's IPO, significant numbers of employee RSUs were approaching their 7-year expiration dates. The company addressed this by conducting a tender offer — buying back some employee shares at a set price — and by waiving the liquidity event trigger for certain RSUs. Waiving the second trigger created taxable events for those employees, which required Stripe to simultaneously provide cash support. This real-world example illustrates both the problem of expiring RSUs and the complexity of solving it.

A company can generally waive the second trigger only once without destroying the deferral structure for all time-vested RSUs. Multiple waivers signal to the IRS that the second trigger is not a real "substantial risk of forfeiture," which could cause immediate taxation of all vested RSUs across the company.

What to ask: When you receive a double-trigger RSU grant, ask: what is the expiration date? A 7-year term on a grant at a company that has been operating for 4 years already gives only 3 years for the second trigger to occur. That timeline may be realistic or not depending on the company's trajectory.

Tax Mechanics at Each Trigger

At Trigger 1 (time vesting): No tax event. Nothing happens from a tax perspective when RSUs time-vest at a private company with a double-trigger structure. No ordinary income, no withholding, no filing requirement.

At Trigger 2 (liquidity event) — the taxable event:

• Ordinary income equal to the FMV of shares at delivery is recognized
• Federal withholding at the 22% supplemental wage rate for the first $1 million of supplemental wages in the year, 37% above that threshold
• California withholding at 10.23% for supplemental wages (though actual liability may be higher at the marginal rate)
• FICA — Social Security (6.2% up to the wage base) and Medicare (1.45%, plus 0.9% Additional Medicare Tax above $200,000 single / $250,000 married)
• Sell-to-cover / net share settlement — the company typically withholds shares equal to the estimated tax owed, delivering the remainder to you

After delivery, any appreciation or decline from the FMV at delivery is a capital gain or loss — short-term if sold within one year of delivery, long-term after one year.

What Happens at an Acquisition

Acquisitions are more variable than IPOs in how they treat RSUs. The merger agreement between the acquirer and the company governs the outcome. Common structures:

Assumption. The acquirer assumes your unvested RSUs and converts them to acquirer RSUs on the same vesting schedule, using an exchange ratio based on the deal price. You receive acquirer equity instead of the original company equity. The second trigger is typically waived in this scenario — once the acquisition closes, the original liquidity condition is deemed satisfied.

Cash-out. All RSUs — vested and unvested — are converted to cash at the deal price. You receive a cash payment equal to the per-share deal price × number of RSUs. This payment is ordinary income, taxed the same as a normal delivery event.

Acceleration. Some RSU grants include acceleration provisions that accelerate unvested RSUs upon acquisition (single-trigger acceleration) or upon acquisition plus qualifying termination (double-trigger acceleration). See Vesting Schedule: How Startup Equity Vesting Works for acceleration mechanics.

Cancellation. In some acquisitions, particularly those at a lower valuation than previous rounds, unvested (and in some cases vested) RSUs may be cancelled without any payment. This happens most often in distressed acquisitions where the deal price is insufficient to provide value to common equity holders.

Single-Trigger RSUs: The Risk You Need to Know

A single-trigger RSU at a private company vests on time alone — no liquidity event required for delivery. When time-based vesting is satisfied, shares are delivered and ordinary income is owed, even if the company is still private and the shares are completely illiquid.

Single-trigger RSUs are uncommon but do appear, particularly at earlier-stage companies or in special grant situations. If you are offered single-trigger RSUs at a private company, the immediate question is: how do you fund the tax bill at each vest date? The answer needs to come from the company — either cash support, company-facilitated secondary sales, or share withholding at vest. Without a clear answer, single-trigger RSUs at a private company with a non-trivial 409A valuation create a genuine cash flow crisis.

The Negotiation Checklist for Double-Trigger RSUs

Before signing any double-trigger RSU grant, verify the following:

1. Confirm it is double-trigger. Single-trigger at a private company without liquidity support is a problem. Ask explicitly: "Are these single-trigger or double-trigger RSUs?"

2. What qualifies as the liquidity event? Does the plan include tender offers and secondary transactions, or only IPO and acquisition? The answer affects when you might see liquidity.

3. What is the RSU expiration date? Know when both triggers must be met. 7 years is common. A shorter term at a late-stage company with no near-term IPO is a meaningful risk.

4. Must I be employed at the time of the liquidity event? If yes, fully vested RSUs are forfeited when you leave — a "must be present to win" clause. If no, you can leave after time-vesting and still receive shares at the liquidity event.

5. What happens to unvested RSUs in an acquisition? Assumption, cash-out, or cancellation? Is there any single-trigger or double-trigger acceleration?

6. Does the company provide sell-to-cover at IPO? Most companies do, but confirm. You should not face a situation where you owe taxes on delivered shares without a mechanism to fund them.

7. What is the current 409A FMV? Useful for estimating the potential value and the eventual ordinary income tax exposure at delivery.

For the full negotiation framework, see Negotiating Equity Compensation at a Private Company.

California Note

California taxes RSU delivery income — the event where both triggers are satisfied — as ordinary income at rates up to 13.3%. There is no capital gains preference and no deferral beyond the delivery event. For California residents, the combined federal and California marginal rate on RSU delivery income at IPO can reach 50%+.

One practical issue at IPO: the lock-up period (typically 180 days) prevents you from selling shares immediately after they are delivered. You owe California state income tax on the full FMV at delivery by April 15 of the following year — before you can sell shares to fund the payment. If the share price declines significantly during the lock-up, you may owe more in taxes than the shares are ultimately worth. Tax planning before the IPO, including estimated quarterly payments, is essential.

This article is for educational purposes only and does not constitute tax, legal, or financial advice. RSU terms vary significantly between companies and grant agreements. Always review your specific grant agreement and consult a qualified tax advisor.