Bona Fide Separation From Service: Presumptions, Delays, and Penalties

A bona fide separation from service is the IRS standard for deciding whether you have genuinely ended your working relationship with an employer, and it controls when deferred compensation and certain retirement distributions can be paid. Under Treasury Regulation 1.409A-1(h), you are generally presumed to have separated once your level of work drops to 20% or less of what you averaged over the prior 36 months, and presumed not to have separated if you continue at 50% or more.¹ Get this call wrong and the IRS can treat the entire deferred balance as taxable now, tack on a 20% additional tax, and add premium interest on top.

The 20% and 50% Presumptions

The regulation sets two bright-line presumptions for plan administrators. Drop to 20% or less of your 36-month average and you are presumed separated. Stay at 50% or more of that average and you are presumed not separated.¹

The 36-month lookback counts every hour you worked for the employer, whether as a W-2 employee or a 1099 contractor. If you have been with the company for less than 36 months, the IRS uses your entire period of service instead.¹

Between 21% and 49%, neither presumption applies. That’s the zone where most disputes live, and the answer turns on what you and your employer actually expected when you left.

What Counts as a Genuine Separation in the Gray Zone

When service falls between the two markers, the central question is whether both sides reasonably anticipated that you would either stop performing services entirely after a specific date or permanently reduce your work to no more than 20% of your prior average.¹

Intent matters more than paperwork. If you formally resigned but kept showing up for projects, answering client calls, and sitting in on meetings, the IRS may conclude that no one really expected the relationship to end. Facts that cut against a genuine separation include continued email access, retained office space, ongoing involvement in decision-making, and communications suggesting the break was temporary.

Facts that support a genuine separation run the other way: turning in company property, losing system credentials, transferring responsibilities to a successor, and written communications confirming a permanent departure. You want a record that makes it obvious both sides treated the relationship as over.

Coming Back as a Contractor or Consultant

Switching your payroll classification from W-2 to 1099 does not, on its own, create a valid separation. This is the most common trap. Leave on Friday, sign a consulting agreement over the weekend, start doing the same work Monday, and the IRS will look past the label change.

The Tax Court in Reinhardt v. Commissioner found no separation from service where an employee sold his equity, moved to contractor status, and kept doing the same work at the same regularity. Ridenour v. United States reached the same result: what matters is whether services continued, not how the worker was classified. Any pre-arranged agreement to return points toward a separation that was never genuine.

Contractor hours count. The regulation specifically pulls independent contractor services into the 20% and 50% calculations, so consulting time stacks on top of any residual employee work when figuring your service level.¹

For workers whose main relationship with the company is as an independent contractor, the regulations offer a safe harbor. Two conditions: the plan can’t pay you until at least 12 months after your last contract expires, and if you perform any services for the same company during that 12-month window, you forfeit the payment entirely. Outside the safe harbor, a contractor is treated as separated when all contracts with the employer expire, but only if the expiration reflects a genuine and complete end to the relationship. If the company expects to renew or hire you as an employee, expiration alone doesn’t do it.²

Moving Within a Corporate Family

You have not separated from service until you stop working for the entire controlled group, not just the specific subsidiary or division that employed you. All entities that are part of the same controlled group are treated as a single employer. Transferring from a parent to a subsidiary, or from one subsidiary to another, is not a separation.²

The ownership threshold for determining a controlled group under 409A is lower than under most other tax rules. Two entities are generally treated as a single employer if one owns at least 50% of the other, compared to 80% for qualified retirement plans. A plan can designate a different percentage between 50% and 80%, or as low as 20% if legitimate business reasons justify it.²

If your employer is part of a corporate family, check whether your new employer shares common ownership with the old one before assuming a separation occurred.

Leaves of Absence and the Six-Month Clock

A leave of absence does not automatically trigger a separation. Your employment relationship stays intact during military leave, sick leave, or any other legitimate leave, as long as the absence does not exceed six months.²

Once a leave stretches past six months, the analysis flips. The employment relationship is treated as continuing only if you have a contractual or statutory right to return to your job. If no such right exists, the IRS treats you as separated on the first day after the six-month mark, which can trigger distribution events you weren’t expecting.²

Medical leave gets an extension. If your absence is due to a physical or mental impairment expected to last at least six continuous months or result in death, and that impairment prevents you from performing your job or a substantially similar one, the six-month window stretches to 29 months.²

Mergers and Acquisitions

Corporate transactions complicate the separation question. Historically, under the “same desk rule,” if you kept doing the same job at the same location but your employer changed hands through a merger, liquidation, or consolidation, the IRS treated you as never having separated. Revenue Ruling 79-336 required an actual termination event like death, retirement, resignation, or discharge.³

The IRS later softened the position. Revenue Ruling 2000-27 established that when an employer sells its business assets and you transfer to the acquiring company, that transfer counts as a separation from service even if you keep doing the same work at the same desk. That opened the door to 401(k) distributions in asset sale transactions.

The practical takeaway: whether a corporate transaction produces a separation depends heavily on the deal structure. A stock acquisition where the corporate entity survives generally does not. An asset sale where you move to the buyer typically does. Get transaction-specific advice before assuming either way.

Which Plans These Rules Actually Govern

The 20% and 50% thresholds are specific to nonqualified deferred compensation plans governed by Section 409A. These are the arrangements most commonly used for executive compensation: supplemental retirement plans, deferred bonus arrangements, and similar agreements where payment is tied to separation from service.

Qualified retirement plans like 401(k)s and 403(b)s use a simpler standard. For those plans, distributions generally become available on death, disability, or severance from employment, meaning you stop working for the employer.⁴ The detailed percentage-based analysis under Section 409A does not apply to qualified plans, though the concept of genuinely leaving the employer matters for both. If you hold both types of benefits, your 401(k) distribution might be straightforward while your nonqualified deferred compensation requires careful attention to the service-reduction math.

The Six-Month Delay for Specified Employees

Even after a valid separation, some employees have to wait. Under Section 409A, if you are a “specified employee” of a publicly traded company, distributions triggered by your separation cannot be paid until at least six months after your departure date, or your death, whichever comes first.⁵

A specified employee is a key employee of a corporation whose stock is publicly traded. The definition borrows from the top-heavy plan rules and generally covers any of the company’s 50 highest-paid officers whose compensation exceeds an annually adjusted threshold, plus significant shareholders. The employer identifies specified employees using a 12-month lookback ending on a designated date (typically December 31), and that status applies for the 12-month period starting on the first day of the fourth month following that identification date.²

Executives are often caught off guard. You can have a textbook-perfect separation and still be locked out of your deferred compensation for half a year. The six-month delay applies only to 409A nonqualified deferred compensation; it does not apply to qualified plan distributions.

What an Invalid Separation Costs

If the IRS decides your separation was not genuine and a 409A distribution was made improperly, the penalty structure has three layers:

All deferred compensation of the same type becomes taxable in the year it vested, even if you have not yet received a dollar of it.
An additional 20% tax applies to the amount required to be included in income, on top of ordinary income tax.⁵
Premium interest accrues at the federal underpayment rate plus one percentage point, calculated as though the deferred compensation should have been included in income in the year it was first deferred or vested, whichever was later.⁵

The penalties fall on you as the employee, not on the employer. And the 20% additional tax applies to the entire deferred balance of the same type, not just the amount improperly distributed. For someone with a substantial deferred compensation arrangement, the combined hit from ordinary income tax, the 20% penalty, and years of accrued interest can eat a serious share of the benefit.

Fixing a Defective Plan Definition Before Penalties Hit

If a plan document itself contains an impermissible definition of separation from service, IRS Notice 2010-6 offers a correction path. The fix is to amend the plan to use a compliant definition, effective immediately, without expanding or narrowing the triggering events beyond what compliance requires.⁶

The strings attached are real. The failure has to have been inadvertent and unintentional. If you or your employer are already under IRS examination for nonqualified deferred compensation issues, the program is generally unavailable. The employer must also identify and fix any other plans with the same defect. If an event within a year of the correction would have triggered a different payment under the old versus new language, 50% of the affected deferred amount is included in income under Section 409A.⁶

The program exists for document-level problems, not for individual distributions that have already gone out the door. Catching a defective plan definition before it produces a bad payout is dramatically cheaper than dealing with the full 409A penalty regime after the fact.

1
Department of the Treasury. 26 CFR Part 1 – Application of Section 409A to Nonqualified Deferred Compensation Plans
2
eCFR. 26 CFR 1.409A-1 – Definitions and Covered Plans
3
Internal Revenue Service. Private Letter Ruling 9931046
4
Internal Revenue Service. 401k Resource Guide Plan Participants General Distribution Rules
5
Office of the Law Revision Counsel. 26 USC 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
6
Internal Revenue Service. Notice 2010-6 – Relief and Guidance on Corrections of Certain Failures of a Nonqualified Deferred Compensation Plan to Comply With 409A(a)