What Is a Bona Fide Plan? Requirements, Tax Rules, and Penalties

A bona fide plan is an employee benefit arrangement that regulators recognize as genuine rather than a paper exercise designed to shift taxable compensation into tax-favored categories. To qualify, the plan needs four things at once: formal written documentation, meaningful communication to participants, day-to-day administration that matches what the documents say, and a real business purpose beyond the tax savings. When any of those pieces is missing, the IRS and Department of Labor can strip the tax benefits, often retroactively, and the bill lands on both the employer and the participants.

The Four Things a Plan Needs

Substance matters more than paperwork. A plan can have flawless documents and still fail if it doesn’t operate the way it’s written. The four requirements work together, and a weakness in any one of them puts the whole arrangement at risk.

Written Documentation

Every bona fide plan begins with a written plan instrument that spells out the benefits, eligibility, funding, and administration, and defines the rights and obligations of the employer and the participants. Vague or incomplete documentation is one of the fastest ways to lose bona fide status; regulators treat missing terms as evidence the plan was never intended to operate as described.

Some plan types require the written foundation by statute. Cafeteria plans under Internal Revenue Code Section 125 must be a “written plan” in which all participants are employees who can choose among two or more benefits consisting of cash and qualified benefits.¹ Without the written foundation, the plan doesn’t qualify at all, no matter how it’s run.

Communication to Participants

A bona fide plan cannot be a secret. Under ERISA, plan administrators must automatically provide participants with a Summary Plan Description, free of charge, describing what the plan provides, how it operates, when eligibility begins, and how to file a claim. The SPD must accurately reflect the plan’s contents as of a date no earlier than 120 days before it’s disclosed.²³

When a participant or beneficiary asks in writing for plan documents, the administrator has 30 days to send them. Missing that deadline can expose the administrator to personal liability of up to $100 per day starting on the 31st day, with courts setting the exact amount and the Department of Labor periodically adjusting the base for inflation.⁴⁵

Consistent and Uniform Operation

The plan must be administered exactly as written, for every participant. This is where most plans get into trouble. An employer who grants exceptions, skips claims procedures, or hands owners and executives preferential treatment is building a case against the plan’s own legitimacy. If the document says claims go through a specific review process, that process has to be followed for every claim. If eligibility rules require a waiting period, every employee has to serve it. A single well-documented exception for the owner can unravel the whole arrangement.

The IRS has noted that a plan document alone is not evidence of established procedures; the sponsor has to show it routinely followed those procedures in day-to-day operations.⁶

Reasonable Scope and a Real Business Purpose

A bona fide plan covers a meaningful group of employees and exists for a genuine business reason. A benefit arrangement built exclusively for the owner-employee, or one where nearly all the benefits flow to a handful of executives, invites immediate scrutiny. Terms must be commercially reasonable too. Contributions that are wildly disproportionate to the actual cost of providing the stated benefits look like disguised compensation.

Legitimate business purposes include attracting talent, retaining staff, or providing meaningful health coverage. Tax efficiency can be a byproduct. It cannot be the plan’s reason for existing.

The Economic Substance Backstop

Behind these requirements sits a broader rule. Congress codified the economic substance doctrine at 26 U.S.C. § 7701(o), which imposes a two-part test on transactions where the doctrine applies. The arrangement must meaningfully change the taxpayer’s economic position apart from federal income tax effects, and the taxpayer must have a substantial non-tax purpose for entering into it.⁷ A plan that fails either prong loses favorable tax treatment regardless of how well it’s documented.

Regulators apply the test on a facts-and-circumstances basis. They look at whether contributions are proportionate to the cost of benefits, whether the arrangement serves a genuine business need, and whether operation matches the promises on paper. When it doesn’t, the contributions get reclassified as taxable income.

Rules That Apply to Specific Plan Types

Beyond the four general requirements, several categories of plans have their own statutory tests that decide whether the tax benefits hold up. If you’re running or joining one of these, that’s usually where the fight over bona fide status actually happens.

Self-Insured Medical Reimbursement Plans

Section 105(h) requires self-insured medical plans to pass both an eligibility test and a benefits test. The eligibility test looks at how many employees are covered. The benefits test requires that every benefit available to a highly compensated individual be available on the same terms to all other participants, including for dependents. Executive-only dental coverage, for example, breaks the plan.⁸⁹

When the eligibility test fails, each highly compensated individual is taxed on a share of benefits proportional to what all HCIs received. When the benefits test fails, the executive-only benefits become fully taxable to the executives. Rank-and-file employees keep tax-free treatment either way. The pain falls on the people the plan was designed to favor.

Cafeteria Plans

Section 125 plans have their own nondiscrimination rules. Highly compensated participants can’t exclude benefits from income if the plan discriminates in their favor on eligibility or on the value of contributions and benefits. A separate test targets key employees: if qualified benefits provided to key employees exceed 25% of the aggregate qualified benefits provided to all employees, every key employee loses the tax exclusion on those benefits.¹ A small company where the owner and a few managers absorb most of the cafeteria plan benefits will almost certainly fail the 25% test. These tests have to be run every year, not just at plan inception.

Nonqualified Deferred Compensation

Section 409A imposes strict rules on when deferred compensation can be distributed, how elections are made, and whether payments can be accelerated. When a plan violates these rules, the entire vested-but-unpaid amount becomes taxable in the current year. The participant also owes an additional 20% excise tax on that amount, plus interest at the IRS underpayment rate plus one percentage point, calculated as if the compensation should have been included in income when it first vested.¹⁰ All of it falls on the participant. For an executive with years of accumulated deferrals, a single 409A violation can trigger a six-figure tax bill in one year.

Davis-Bacon Fringe Benefits

Contractors on federally funded construction projects face a separate bona fide standard. To take credit for fringe benefits against prevailing wage requirements, the benefits must be common in the construction industry and delivered through a plan that meets legal requirements, including ERISA compliance, IRS rules, and applicable state insurance laws.¹¹

Funded plans require contributions that are irrevocable, made to an unaffiliated trustee or third party at least quarterly, with no ability for the contractor to recapture or divert funds. Unfunded plans paid from general assets face tighter scrutiny: the plan must be communicated in writing, represent an enforceable commitment, be backed by set-aside funds sufficient to cover benefits, and receive prior approval from the Department of Labor before the contractor can take Davis-Bacon credit for those costs.¹¹

What It Costs When a Plan Fails

Losing bona fide status hits both sides of the employment relationship, and it can reach back through several open tax years.

For Participants

Amounts previously excluded from gross income — employer contributions to health coverage, deferred compensation, fringe benefits — become taxable, often retroactively. Participants may need to file amended returns and pay back taxes plus interest. For nonqualified deferred compensation, the 20% excise tax under Section 409A compounds the damage significantly.¹⁰ Group health plans that fail applicable requirements can also trigger an excise tax of $100 per day per affected individual for the entire period of noncompliance.¹²

For Employers

Once a plan is disqualified, the employer loses the ability to deduct contributions when they’re made. Instead, the employer can only deduct contributions when the amounts are actually included in the employee’s gross income, which may be years later, or never, depending on vesting.¹³ That timing shift creates cash flow problems, since deductions were already reported on prior returns and back taxes plus interest come due on the disallowed amounts. ERISA adds its own layer: failing to file the required Form 5500 can result in civil penalties adjusted annually by the DOL for inflation, and these amounts can accumulate to more than the underlying tax liability.⁵

Fixing Problems Before They Get Worse

Catching a problem early matters. Both agencies run voluntary correction programs that let sponsors fix errors before an audit turns them into penalties.

The IRS allows self-correction for many operational mistakes under EPCRS without filing forms or paying a fee. Eligible errors include failing to follow plan terms, excluding eligible participants, missing promised contributions, and loan administration mistakes. The sponsor has to show established procedures were in place and that the error came from an oversight in applying them, not from having no procedures at all. Insignificant failures can be self-corrected at any time; significant failures have to be corrected within a set timeframe based on the share of plan assets involved, participants affected, how long the error persisted, and how quickly it was addressed. Document failures, where the plan document itself doesn’t comply with tax law, are not eligible for self-correction and require a formal submission to the IRS.⁶

The Department of Labor’s Voluntary Fiduciary Correction Program covers 19 categories of fiduciary violations, including late participant contributions, prohibited loans to parties in interest, purchases or sales of plan assets at improper prices, excessive compensation, and improper plan expenses. A completed correction produces a no-action letter for the specific transactions corrected.¹⁴

Neither program is a blank check. They work only for sponsors who come forward before regulators arrive. Once an audit or investigation opens, these options are generally off the table and the penalties escalate.

1
Office of the Law Revision Counsel. 26 US Code 125 – Cafeteria Plans
2
U.S. Department of Labor. Plan Information
3
eCFR. 29 CFR 2520.102-3 – Contents of Summary Plan Description
4
Office of the Law Revision Counsel. 29 USC 1132 – Civil Enforcement
5
U.S. Department of Labor. Fact Sheet – Adjusting ERISA Civil Monetary Penalties for Inflation
6
Internal Revenue Service. Retirement Plan Errors Eligible for Self-Correction
7
Office of the Law Revision Counsel. 26 USC 7701 – Definitions
8
Office of the Law Revision Counsel. 26 US Code 105 – Amounts Received Under Accident and Health Plans
9
Internal Revenue Service. Self-Insured Medical Reimbursement Plans
10
Office of the Law Revision Counsel. 26 US Code 409A – Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
11
U.S. Department of Labor. Fact Sheet 66E – The Davis-Bacon and Related Acts – Compliance with Fringe Benefit Requirements
12
Office of the Law Revision Counsel. 26 USC 4980D – Failure to Meet Certain Group Health Plan Requirements
13
Internal Revenue Service. Tax Consequences of Plan Disqualification
14
U.S. Department of Labor. Fact Sheet – Voluntary Fiduciary Correction Program