M&A and change-in-control planning

§280G golden parachute excise tax: calculator and planning guide.

When an executive receives payments contingent on a change-in-control, IRC §280G and §4999 impose a double penalty: the company loses its deduction on the "excess" amount, and the executive owes a 20% excise tax on top of ordinary income tax. For a high-bracket executive, that combination can push the effective rate on excess parachute payments above 55%. A pre-close plan that keeps total contingent payments below the 3× safe harbor — or that reduces the amount that qualifies as contingent — can eliminate both penalties entirely.

§280G and §4999: the two-sided penalty

Two separate code sections create the penalty structure:

• IRC §280G — disallows the company's deduction for any "excess parachute payment." The company pays full corporate income tax on the amount paid, with no offsetting deduction.¹
• IRC §4999 — imposes a 20% excise tax on the recipient on the same excess parachute payment. This excise is non-deductible and non-creditable — it cannot offset other tax liabilities and is added to, not substituted for, ordinary income tax.³

The combined cost: the company absorbs a deduction loss (roughly 21% of the excess at the current 21% corporate rate) and the executive pays 20% excise on top of 37% federal income tax — approximately 57% effective federal rate on the excess amount, before state income taxes.

Who is a "disqualified individual"?

§280G applies only to payments to "disqualified individuals," defined under the regulations as employees or independent contractors who, during the 12-month period before the change-in-control, were any of the following:²

• An officer of the company (measured by an annual compensation floor under the regulations),
• A shareholder owning more than 1% of the company's stock by vote or value, or
• A "highly compensated individual" — generally, one of the highest-paid 1% of employees.

Most C-suite, division presidents, and SVP-level executives will qualify. The identification of disqualified individuals is typically part of pre-close M&A diligence and is handled by employment counsel and the company's benefits advisors.

The calculation: base amount, 3× trigger, and excess

Base amount

The base amount is the executive's average annualized includable compensation for the 5 taxable years ending before the change-in-control.¹ In most cases this is the average of the last 5 years of W-2 Box 1 wages. If the executive was employed for fewer than 5 years, you average over all years employed. The base amount is critical: a lower base amount means the 3× threshold is hit sooner, and the excess calculation grows larger.

The 3× trigger (safe harbor)

§280G applies only when the present value of total parachute payments equals or exceeds 3× the base amount. Below that threshold, neither the deduction disallowance nor the excise tax applies — none of the payments are "parachute payments" for §280G purposes. This is the safe harbor, and staying below it eliminates the issue entirely.

What counts as a parachute payment

Any payment "in the nature of compensation" that is contingent on a change-in-control to a disqualified individual is potentially a parachute payment. Common components:

• Cash severance accelerated or enhanced because of the CIC
• Accelerated equity vesting — RSUs, PSUs, options (valued at FMV minus exercise price at the CIC date, with present-value discounting for time to vest)
• Transaction bonuses, stay bonuses, or retention payments tied to the deal
• Deferred compensation distributions triggered by the CIC event
• Benefits continuation with enhanced or accelerated CIC-contingent value

Base salary and pre-existing benefits not triggered or enhanced by the CIC are not parachute payments. Normal deferred compensation that was already fully vested and not accelerated by the CIC can sometimes be excluded. Each component requires analysis against actual plan documents and the merger agreement.

Excess parachute payment: the number executives most often get wrong

Once the 3× threshold is crossed, the excess parachute payment — the amount subject to both §280G deduction disallowance and §4999 excise tax — is:

Excess parachute payment = Total CIC-contingent payments − 1× base amount

Not 3× base. The regulations allocate 1× base amount as presumed-reasonable compensation earned regardless of the CIC event. Everything above 1× base is excess. This means an executive with a $600K base amount and $2.4M in contingent payments (which exceeds the $1.8M trigger) has an excess of $1.8M — not $600K.

§280G excise tax calculator

Estimate whether your CIC package triggers §280G and the magnitude of the excise tax.

Planning strategies to reduce or eliminate §280G exposure

1. Stay below 3× — the cleanest solution

If total contingent payments stay below 3× base, no §280G issue exists at all — neither the deduction disallowance nor the excise tax. This is most practical when payments are close to the threshold, when some components can be structured as non-contingent (e.g., a retention bonus agreed to before the CIC process began), or when the executive can document a high base amount due to consistent incentive compensation history. A slightly smaller package that stays below 3× often nets more after tax than a larger package subject to 57%+ effective rates on the excess.

2. Reasonable compensation demonstrations

Under Treasury Regulations §1.280G-1, Q&A-43 through Q&A-44, a disqualified individual can rebut the parachute payment presumption for any specific payment by demonstrating that it represents reasonable compensation for services actually rendered or to be rendered — regardless of CIC contingency.² Common applications:

• Non-compete covenants — amounts allocated to a genuine non-compete can be excluded from the parachute payment calculation if supported by a formal valuation from a qualified appraiser. This is one of the most commonly used reduction strategies in practice.
• Post-close consulting or employment — compensation for genuine services to be performed post-close can be excluded from the contingent payment calculation if it constitutes reasonable compensation at market rates.
• New equity grants — equity granted as part of a new employment arrangement, not an acceleration of prior awards, may qualify as reasonable compensation for services, not a parachute payment.

The burden of proof is on the executive. Documentation must be prepared before close; post-hoc substantiation is much harder to sustain under IRS scrutiny.

3. §280G(b)(5) private company shareholder vote exception

For privately held companies (stock not publicly traded on an established securities market), §280G(b)(5) provides a complete exemption from both the deduction disallowance and the excise tax if the payments are approved by more than 75% of the company's shareholders by voting power — after full disclosure of all material facts about the payments.¹

This exception is common in private-equity-backed transactions and founder-owned company sales. The vote must meet specific procedural requirements: timing (must occur before payment), disclosure (adequate description of all CIC-contingent amounts), and shareholder qualification (those with a substantial interest generally cannot vote for their own payments). A defective vote does not cure the problem retroactively. Engage benefits counsel to structure the vote properly.

4. Gross-up clauses and best-net provisions

Historically, many large-company employment agreements included "gross-up" provisions — the company agrees to pay additional compensation to make the executive whole for the 20% excise tax. ISS and major proxy advisory firms have opposed gross-up clauses since the early 2010s, and most new executive agreements no longer include them for public companies.

A common replacement is the "best-net" or "better-after-tax" clause: the company either (a) reduces the total contingent payments to just below the 3× safe harbor or (b) pays the full amount without reduction — whichever results in greater after-tax proceeds to the executive. If you have a legacy agreement with a gross-up or best-net clause, verify it is still enforceable under the current plan documents and confirm how it interacts with the deal structure before close.

How equity acceleration is valued under §280G

Equity acceleration is often the largest component of §280G exposure, and its measurement is frequently misunderstood. The regulations value accelerated equity at the spread (FMV minus exercise price for options; FMV for RSUs and PSUs) at the CIC date. But the regulations also require a present-value reduction for the time value of money and, critically, a discount for the probability that the executive would have met the vesting condition absent the CIC.⁴

Single-trigger acceleration (equity vests immediately on the CIC, regardless of whether employment terminates) is the most straightforward: essentially 100% of the accelerated value is contingent on the CIC. Double-trigger structures (equity vests only if employment terminates within a specified window post-close) may qualify for a probability discount under the regulations, reducing the amount that counts as a parachute payment.

Review your equity plan's acceleration provisions against the merger agreement before assuming the §280G exposure is limited. See the change-in-control equity guide for the broader picture, and the RSU vesting guide for treatment of unvested awards at termination.