What Is Section 409A (Deferred Compensation)? Definition, How It Works

The 409A definition is wide on purpose. A plan defers compensation when you gain a legally binding right in one year to pay that is, or may be, paid in a later year. A legally binding right is one the employer cannot cancel at will once you have done the work. “Plan” means any agreement or arrangement, including one that covers a single person. An offer letter or a severance letter is a plan if it promises pay later. The rule came in with the American Jobs Creation Act of 2004. It applies to amounts deferred after December 31, 2004.

The statute leaves out what it calls qualified employer plans, such as a 401(k), a 403(b) or a governmental 457(b). It also leaves out bona fide vacation leave, sick leave, compensatory time, disability pay and death benefit plans. Almost everything else that pays later is in scope. Any arrangement that promises such pay is a 409A deferred compensation plan, and advisers loosely call the pay 409A compensation. Common examples are deferred bonuses and supplemental executive retirement plans. Phantom stock, a cash award that tracks the share price, is in scope, and so are other cash-settled awards. So are RSUs that settle after the year they vest, and severance above the regulation’s limits.

What a 409A Account Actually Is

Many deferred compensation plans keep a 409A account for each participant. It is a ledger credited with the amounts deferred and with notional earnings on them, meaning returns on paper. The account is only a promise, and no money is set aside for you. Some plans try to secure the promise. The statute treats assets moved into an offshore trust as paid at that moment. The same goes for assets restricted when the employer’s finances weaken. Either step makes the pay taxable at once.

Every rule in Section 409A answers one of three questions. When may you choose to defer? When may the money be paid? When is early payment banned? A 409A compliant plan answers all three in writing before the pay is earned. Then it follows its own text.

When You Elect

An election to defer pay for work in a given year must be made by the end of the year before. A newly eligible participant gets 30 days, and the election covers only work done after it. Pay based on performance measured over at least 12 months may be deferred up to six months before the period ends. A later election to push a payment back has three conditions. You must make it at least 12 months before the first scheduled payment. It takes effect no sooner than 12 months after you make it. It must delay the payment by at least five years, except for payments on death, disability or an emergency.

When It May Be Paid: The Distribution Rules

• Separation from serviceLeaving the employer, as the regulation defines it. See 409A separation from service. At a public company, a specified employee waits six months. See 409A specified employee.
• DisabilityThe 409A disability definition is narrow. You must be unable to do any substantial gainful activity, meaning real paid work, because of an impairment expected to last at least 12 months or to end in death. You also qualify if you receive income replacement for at least three months under the employer’s accident and health plan because of such an impairment.
• DeathPayment to the beneficiary on the date or schedule the plan fixed in advance.
• A fixed date or scheduleSet when the pay was deferred, such as “March 1, 2030,” or five annual installments from that date.
• A change in controlOnly as the regulation defines it. See 409A change in control.
• An unforeseeable emergencyA severe financial hardship from illness, accident or casualty. The payment is capped at the amount needed to meet it, plus the tax on the payment.

When It May Not Be Paid

A plan may not accelerate a payment, meaning pay it early, except under a closed list in the regulation. The 409A plan termination rules are on that list. They let a company wind up a plan and pay everyone out in three cases. The first is within 12 months of a corporate dissolution, or with a bankruptcy court’s approval. The second is from 30 days before to 12 months after a change in control. Every aggregated plan, meaning every plan of the same type, must then be ended and paid out within 12 months. The third is at any other time, on four conditions. The termination is not close to a downturn in the company’s finances. Nothing is paid for 12 months. Everything is paid within 24 months. No similar plan is adopted for three years.

Payment timing has a small grace margin. A payment counts as made on its date if it is paid later in the same tax year. It also counts if it is paid by the 15th day of the third month after the date, when that falls later. A payment up to 30 days early counts too. In each case, the employee must have no way to choose the tax year.

Most equity and cash pay at a private company is designed to fall outside the rules altogether. Each exception has conditions. A payment that misses one is back inside.

Short-term deferral

Pay received by the 15th day of the third month after the year it vests is not deferred. The short-term deferral exception covers most bonuses and RSUs.

Options and SARs at fair market value

An option is outside 409A if it covers a fixed number of shares and its strike can never be below the stock’s fair market value on the grant date. The same holds for SARs (stock appreciation rights, which pay out the rise in the share price). Setting that value is what a 409A valuation is for.

ISOs and ESPP options

Incentive stock options under §422 are not deferred compensation. Neither are options under a §423 employee stock purchase plan.

Restricted stock

Shares you receive now are property you already own. They are taxed under §83 when they vest, or when you receive them if you make an 83(b) election. Nothing is promised for later, so 409A does not apply.

Involuntary severance

Pay for being let go is outside 409A up to a cap. The cap is two times the lesser of your annual pay or the §401(a)(17) limit, the federal ceiling on pay that counts for retirement plans. That limit is $360,000 for 2026, so the cap is $720,000. The pay must be made by the end of the second year after the year you leave.

Normal payroll timing

December salary paid in the first January payroll is not a deferral.

The first contact is usually the option grant. A private company has no market price, so it sets the strike from an independent appraisal of its common stock. If the strike turns out to be below fair market value, the option is a discounted option. It becomes deferred compensation with no fixed payment date, which is a plan failure. Exercising the option quickly does not rescue it, as the regulation’s own example shows. How strikes are set is on the 409A valuation page.

The second is equity that settles later. RSUs at a pre-IPO company often vest on two conditions: service and a liquidity event, such as an IPO or a sale of the company. Whether they stay a short-term deferral depends on how that second trigger is written. The third is the exit itself. An acquisition can trigger deferred payments only if it meets the change-in-control tests. An IPO switches on the six-month delay for specified employees.

If you invest in a private company through a fund or similar vehicle, 409A does not reach your interest. You are an investor, and the rule covers people paid for their services. It does reach the founders and employees on the same cap table, the list of who owns what. The deferred pay promised to them is part of what an acquirer inherits.

A senior engineer at a private company holds five pieces of pay. The common stock was appraised at $10 a share on each grant date. Each piece raises two questions. Is it inside Section 409A? If so, does it comply?

The discounted grant is the expensive one. The employee did nothing wrong, yet the cost of the failure is theirs. The deferred amount counts as income as the options vest, and the employee owes the 20% additional tax and interest on top. The page on 409A penalties works through that cost in dollars.

There is no 409A form to file, no application and no advance approval. Compliance is checked after the fact. In a 409A audit, IRS examiners follow the Nonqualified Deferred Compensation Audit Technique Guide (Publication 5528, revised March 2024). It reviews the plan document and the way the plan was run as two separate questions. Failed amounts are reported on the employee’s Form W-2, in box 1 and in box 12 with code Z. The additional tax goes on the employee’s Form 1040, the personal tax return.

• Thinking only executives are coveredAny employee, contractor or director with a promise of later pay can be covered. A one-page letter is enough to be a plan.
• Granting on a stale valuationAn appraisal older than 12 months, or one that predates a new funding round, can leave a grant priced below fair market value.
• Leaving payment dates open“Paid when the board decides” is not a permitted event. Discretion over timing is itself a failure.
• Paying early as a favorSettling a deferred bonus ahead of schedule is an acceleration. The generous act is the violation.
• Treating the HR exit date as the 409A dateA move to part-time or a consulting role may or may not be a separation from service.
• Assuming the company bears the costThe income inclusion, the 20% and the interest fall on the employee, even when the company drafted the plan.

Nonqualified deferred compensation

Pay earned under a legally binding right in one year and payable in a later one, outside a qualified plan such as a 401(k).

Legally binding right

A right the employer cannot reduce or cancel at will once the services are performed. Without one, nothing has been deferred.

Substantial risk of forfeiture

A condition you can fail and so lose the pay, such as continued service or a goal like completing an IPO. Its lapse is what “vesting” means under 409A.

Permissible payment event

One of the six events on which deferred pay may be paid, fixed in the plan in advance.

Short-term deferral

A payment made within 2½ months after the year it vests. It falls outside 409A altogether.

Separation from service

Leaving the employer as 409A defines it, including a permanent drop to 20% or less of former services.

Change in control event

A change in ownership, in effective control, or in ownership of a substantial portion of assets, as the regulation measures them.

Discounted option

An option whose strike price is below the stock’s fair market value on the grant date. It counts as deferred compensation with no fixed payment date.

409A valuation

The appraisal of a private company’s common stock that sets option strike prices at fair market value.

Every rule and figure was checked against the statute, the Treasury regulations and IRS publications on October 2, 2026. The §401(a)(17) limit behind the severance cap is indexed and changes every year. The example is illustrative and uses no market data.