Double-trigger RSUs taxation and liquidity event timing

Quick answer: For 2025/2026, "double trigger" RSUs (common at private companies) aren't taxed at the time-based vesting date alone — they become taxable only when a second condition, typically a liquidity event like an IPO or acquisition, is also satisfied. The documents don't use the term "double trigger" itself, but the underlying rule comes from how §83 and the RSU-specific carve-out in §83(i)(7) treat restricted stock units.

What it is

A "double trigger" RSU award requires two conditions before shares (and taxable income) are delivered: (1) time-based vesting (e.g., 4 years of service) and (2) a liquidity event condition (e.g., the company going public or being acquired). Until both conditions are met, the employee has no stock and no taxable event. This structure is common at private companies specifically because it avoids taxing employees on illiquid stock they can't yet sell.

Note: none of the provided IRS or Code documents use the phrase "double trigger" — this explanation is built from the general timing rules for RSUs under §83 and the restricted-property regulations.

How it works

For ordinary restricted stock (not RSUs), taxation is governed by Treas. Reg. § 1.83-1, which provides that "such property is not taxable under section 83(a) until it has been transferred... and become substantially vested."¹ But RSUs are treated differently under the Code itself. IRC § 83(i)(7) states plainly that "This section (other than this subsection), including any election under subsection (b), shall not apply to restricted stock units."² That means the general §83 vesting-triggers-tax rule — and the §83(b) early-election option — do not apply to RSUs at all.

Instead, RSUs are typically taxed under general timing-of-income principles (constructive receipt / actual delivery) at the point the employee actually receives the shares — which under a double-trigger design is when the second condition (the liquidity event) is satisfied, not merely when time-vesting occurs. This is why private-company RSUs commonly avoid triggering a tax bill years before the employee has any ability to sell stock to cover it.

Example (illustrative)

Suppose an employee is granted RSUs that time-vest over 4 years, but the award also requires a "qualifying liquidity event" before shares are delivered. If the employee completes 4 years of service in 2025 but the company doesn't go public until 2027, no taxable compensation income arises in 2025. The employee recognizes ordinary income only in 2027, based on the value of the shares actually delivered at that time.

Risks and limits

• Because §83(i)(7) excludes RSUs from §83(b), employees cannot file a Section 83(b) election on RSUs to accelerate tax to the low-value grant date — Publication 525 confirms the §83(b) choice applies to restricted property, and separately notes the §83(i) deferral election mechanics don't apply to typical RSUs in the same way as options/restricted stock.
• Separately, IRC § 83(i) offers qualified employees of certain private corporations an elective deferral of income recognition for up to 5 years past vesting on qualified stock, but Publication 525 notes this election covers stock from "exercise of an option, or... settlement of an RSU, and an option or RSU was granted by the corporation"³ — this is a separate, narrower statutory deferral election, distinct from double-trigger plan design, and comes with strict eligibility rules (e.g., excludes 1% owners, CEOs/CFOs, and top compensated officers, per Pub. 525).
• Double-trigger design itself is a compensation/plan-drafting choice, not a Code election — the documents don't provide a specific statutory citation governing exactly when RSU income is includible absent a §83(i) election; that turns on general income-recognition doctrine (constructive receipt), which isn't detailed in these documents.

In practice

Double-trigger RSUs defer taxation (not eliminate it) until actual delivery of shares, aligning the tax event with liquidity. When shares are eventually delivered, the value is ordinary compensation income (subject to withholding), and any post-delivery appreciation is treated as capital gain/loss.

Because the exact timing rule for double-trigger RSUs turns on your specific plan's language and general tax timing doctrine not fully covered in these documents, it's worth having a CPA review your actual RSU agreement to confirm when income will be recognized and whether any §83(i) election is available.