Equity appreciation units are a contractual right to a future cash payment equal to the increase in a company’s per-unit value between the day they are granted to you and the day they are settled. You never own any shares, membership interests, or voting rights. Private companies and LLCs use them to give key employees financial upside that looks like equity without actually issuing equity, and the entire payout, when it eventually arrives, is taxed as ordinary wages.
If you have been offered equity appreciation units, or EAUs, the terms of your grant agreement will control almost everything about what you ultimately receive. The sections below walk through what the instrument is, when you get paid, how the money is taxed, and the ways the arrangement can go wrong for you specifically.
What You’re Actually Being Granted
An EAU is a promise, not a piece of the company. If your grant covers 1,000 units with a base price of $10, and the company’s per-unit value at settlement is $50, the company owes you $40 per unit, or $40,000. If the value stays flat or drops below $10, you get nothing. The upside tracks equity performance; the downside is zero rather than a loss.
Because no property changes hands, you have no voting rights, receive no dividends or distributions, and are not added to the company’s capitalization table. For the company, that is the main appeal: no dilution, no new owners, no partnership tax complications. For you, it means your rights come entirely from the contract. There is no statutory fallback if the document is vague.
EAUs show up most often at LLCs taxed as partnerships, which cannot issue traditional stock options. Corporations tend to use Stock Appreciation Rights to accomplish something similar, but SARs can often be structured to sit outside Section 409A when the exercise price is set at or above fair market value on the grant date. EAUs at non-corporate entities fall squarely inside the 409A deferred compensation framework, with all the rigidity that implies.
How EAUs Differ From Lookalike Instruments
Three other tools get confused with EAUs, and the differences matter when you’re comparing offers.
Full-value phantom stock pays the entire per-unit value at settlement, not just the appreciation. A phantom unit settling at $50 pays $50; an EAU with a $10 base price settling at $50 pays $40. Phantom stock plans sometimes include dividend-equivalent payments; EAUs typically do not.
Profits interests, by contrast, are actual equity in an LLC. Accepting one makes you a member, which means a Schedule K-1, potential tax on allocated income before any cash reaches you, and the full weight of partnership tax rules. The compensating benefit is that growth on a profits interest can qualify for long-term capital gains treatment. An EAU payout is always ordinary income, no matter how long you held the units.
Stock Appreciation Rights operate almost identically to EAUs on the payment math, but they reference actual corporate stock and can sometimes avoid 409A entirely.
The Base Price and How It’s Set
The base price is the starting line for measuring your appreciation, and it must reflect fair market value on the grant date. For a private company, Section 409A regulations provide three safe harbor methods for establishing that value:
- An independent appraisal by a qualified third party, valid for up to 12 months.
- A formula-based valuation, such as a multiple of revenue or book value, applied consistently across all equity-related transactions.
- The illiquid startup presumption, available only to private companies less than 10 years old with no publicly traded stock and no expected change-of-control event within 90 days. Under this method, the valuation can be done by someone with relevant knowledge and experience, including a company insider.
If the IRS later concludes the base price was set below fair market value, the units are treated as providing a deferral of compensation from day one, which triggers the Section 409A penalties described further down. The penalties fall on you, not on the company. Confirming that the company obtained a proper valuation before your grant date is worth doing.
Vesting: What You Earn and When
Vesting is how the company ensures you stay. Until units vest, you have no right to any payout, no matter how much the company has grown.
The common structure is time-based: units vest ratably over three to five years, often with a one-year cliff. If you leave before the cliff, you walk away with nothing. After the cliff, vesting usually continues monthly or annually in equal installments. Performance-based vesting ties the earning of units to specific company milestones such as a revenue target, a major deal, or profitability. Some plans combine both.
One point confuses almost everyone the first time: vesting does not trigger payment. Vesting gives you the right to receive a payout eventually. The payout itself happens only when the plan’s settlement event occurs, and that event is governed by Section 409A, not by your preferences.
When You Actually Get Paid
Section 409A limits payment of nonqualified deferred compensation to six permissible triggers, and the plan document must name the ones that apply:
- Your separation from service (leaving the company).
- Your becoming disabled.
- Your death.
- A fixed date or schedule specified in the plan.
- A change in ownership or control, such as an acquisition or IPO.
- An unforeseeable emergency.
You cannot request payment on your own schedule, and the company cannot accelerate payment outside narrow exceptions in the regulations. That rigidity is the price of tax deferral.
In practice, most EAU plans tie settlement to a change-of-control event, because that is when the company has the cash on hand to pay. Some plans also pay out on separation from service or on a fixed date, but whichever triggers apply must be locked into the plan when it is drafted. Read your grant agreement specifically to confirm which triggers apply to your units. If the only trigger is a sale and no sale ever happens, no payment is ever owed.
How the Payout Is Taxed
Nothing is taxable when EAUs are granted, and nothing is taxable when they vest. You have received a contractual promise, not cash or property, so there is no income to report.
At settlement, the full payout is ordinary income at your marginal federal rate. There is no capital gains treatment available. For employees, the amount appears on Form W-2 in Box 1, combined with other wages, and the company withholds federal income tax, state income tax where applicable, and payroll taxes before releasing the net amount. For independent contractors or non-employee directors, the income appears instead on Form 1099-NEC in Box 1.
Most plans settle in cash as a lump sum. A smaller number settle in actual equity, which may come with transfer restrictions, though the tax treatment at receipt remains the same.
FICA Is Owed at Vesting, Not at Payout
Here is a timing quirk that catches people off guard. Under the special timing rule in federal regulations, Social Security and Medicare taxes on nonqualified deferred compensation are owed at the later of when you perform the services or when the right stops being subject to a substantial risk of forfeiture. In practice, that is your vesting date, not your eventual payout date.1eCFR. 26 CFR 31.3121(v)(2)-1 – Treatment of Amounts Deferred Under Certain Nonqualified Deferred Compensation Plans
The FICA amount at vesting is based on the present value of the deferred amount at that time, which is usually smaller than what you ultimately receive. Paying FICA on the smaller number often works in your favor, especially when the vesting-year amount sits below the Social Security wage base, because Social Security tax is capped while Medicare tax is not.
If the employer skips the special timing rule at vesting, the regulations require FICA on the full benefit payment when it is actually paid, which typically produces a larger total FICA bill.1eCFR. 26 CFR 31.3121(v)(2)-1 – Treatment of Amounts Deferred Under Certain Nonqualified Deferred Compensation Plans
What a 409A Violation Costs You
Section 409A compliance is the single most important regulatory issue with EAUs, and the penalties for failure fall on you as the recipient, even though the company drafts and administers the plan. This asymmetry is why reading the grant agreement and asking about valuation practices is worth your time.
When a 409A violation is found, three consequences hit at once:
- All vested deferred compensation under the plan becomes taxable in the current year, whether or not you have received any payment.2Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
- A 20% additional tax applies to the amount forced into income, on top of regular income tax.3Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
- Premium interest at the standard underpayment rate plus one percentage point runs from the year the compensation was first deferred (or first vested, if later) through the year of the violation.3Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
On $200,000 of vested deferred compensation, that works out to income tax on the full $200,000 in the violation year, a $40,000 additional tax, and interest running back to the deferral date. The combined hit can easily exceed half the award’s value.
Common violations include setting the base price below fair market value, failing to specify permissible payment events in the plan document, and paying out on a schedule that deviates from what the plan says. Sophisticated employees sometimes negotiate for representations and warranties about 409A compliance in their grant agreements.
What Happens When You Leave
Your grant agreement controls what happens to your units on departure, and the terms vary with the reason you left.
Unvested units are forfeited in virtually all plans, no matter why you left. There is no payout for unvested appreciation and no obligation to compensate you for lost upside.
Vested units are treated differently depending on the plan’s settlement triggers. If separation from service is a payment trigger, your vested units may be settled shortly after you leave. If the only trigger is a change-of-control event, your vested units sit in limbo until that event happens, which could be years away or might never happen at all. Some plans let vested units survive termination indefinitely; others impose a window after which even vested units expire.
Termination for cause is the worst scenario. Many plans forfeit all units on a for-cause termination, including units that have already vested, and some include clawback provisions letting the company recover gains from prior settlements. These provisions are generally enforceable, so the definition of “cause” in your grant agreement deserves close attention.
Golden Parachute Exposure in a Sale
If the company is sold and your EAU settlement coincides with the transaction, the golden parachute rules under Sections 280G and 4999 can create an additional tax hit, but only for certain recipients.
These rules apply only to “disqualified individuals,” a group that includes officers, shareholders who own more than 1% of the company’s stock by value, and highly compensated individuals.4eCFR. 26 CFR 1.280G-1 – Golden Parachute Payments If you are one, and your total change-of-control-related payments (EAU settlement, severance, accelerated vesting, and anything else triggered by the deal) equal or exceed three times your average W-2 compensation over the prior five years, two things follow. The company loses its deduction for the “excess” parachute payment, and you owe a 20% excise tax on that excess, on top of regular income tax.5Internal Revenue Service. Golden Parachute Payments Audit Technique Guide The combined marginal rate on excess parachute payments can approach 60% or more once state taxes are included.
Some plans address this with a cutback provision that reduces your total payments to just below the three-times threshold so the excise tax never applies. Others include a gross-up provision, where the company pays the excise tax for you, though gross-ups have become uncommon. If you are a senior employee or significant holder, this is worth raising before any deal closes.
For most rank-and-file EAU recipients, the parachute rules will not apply, but confirming your status before a sale is better than finding out afterward.