What Is an ERISA Prohibited Transaction?

A transaction can be priced fairly, approved by a committee and still be prohibited.

ERISA does not regulate retirement-plan conflicts only by asking whether the plan lost money. Section 406 blocks specified transactions with insiders and separately restricts fiduciary self-dealing. If the transaction falls inside a prohibition, the next question is whether a statutory or administrative exemption applies.^[1][2]

That sequence matters:

Identify the counterparty → classify the transaction → test the exemption → run the fiduciary-duty analysis

Skipping the exemption step produces false positives. Skipping the final fiduciary step produces false comfort.

Key Takeaways

• ERISA prohibited transactions fall into two broad groups:
• specified dealings between a plan and a party in interest
• fiduciary self-dealing and conflicts of interest.^[1][2]
• A sale at fair market value can still be prohibited if it is between the plan and a party in interest and no exemption applies.
• Service providers are parties in interest. Ordinary recordkeeping, legal, accounting and similar arrangements are possible because ERISA contains exemptions—not because the service provider falls outside the prohibited-transaction rules.^[3][7]
• ERISA's party in interest and the Internal Revenue Code's disqualified person are overlapping concepts used in different statutory frameworks.^[3][4][6]
• A participant loan can avoid prohibited-transaction treatment when the statutory exemption and plan-loan requirements are satisfied.^[8]
• Disclosure is not a blanket cure for fiduciary self-dealing.
• An exemption from Section 406 does not eliminate the separate duties of prudence and loyalty.
• IRC Section 4975 generally imposes an initial excise tax of 15% of the amount involved for each year or part of a year in the taxable period, with a possible additional 100% tax if the transaction is not corrected within the taxable period.^[5][6]
• Correction generally means undoing the transaction to the extent possible and putting the plan in a financial position no worse than it would have occupied under the highest fiduciary standards.^[5][6]
• DOL's Voluntary Fiduciary Correction Program, updated in 2025, can provide a structured correction path for specified fiduciary violations; the current program also contains a self-correction component for limited categories.^[9][10]

The Four-Question Transaction Test

Before deciding that a retirement-plan transaction is permissible, answer four questions.

1. Who is on the other side?

Is the counterparty:

• sponsoring employer
• fiduciary
• service provider
• union
• significant owner
• officer
• specified relative
• another party in interest or disqualified person?

2. What is the transaction?

Is the plan:

• buying or selling property
• leasing property
• lending money
• extending credit
• receiving services
• providing services
• transferring plan assets
• allowing plan assets to be used for someone else's benefit?

3. Is there an exemption?

A transaction inside Section 406 is not automatically dead.

Check the actual exemption and every condition.

4. Is the fiduciary process still prudent and loyal?

Passing the exemption test does not answer:

• Was the price reasonable?
• Was the provider properly selected?
• Was the conflict handled correctly?
• Did the fiduciary act solely for participants and beneficiaries?

The exemption and fiduciary-duty analyses overlap, but they are not substitutes.

Section 406(a): Transactions With Parties in Interest

DOL describes one prohibited-transaction category as dealings between the plan and a party in interest.^[1]

The principal restrictions include direct or indirect:

• sale, exchange or lease of property
• lending or other extension of credit
• furnishing of goods, services or facilities
• transfer to, or use by or for the benefit of, a party in interest of plan income or assets.^[1][2]

Employer-security and employer-real-property rules add another specialized layer.

The basic concern is structural.

A party close to the plan can have incentives that differ from participants' interests.

ERISA does not wait for proof that the deal was unfair before imposing the transaction rule.

Fair Market Value Is Not a Universal Exemption

Suppose the sponsoring employer owns a building worth:

$2 million

An independent appraisal supports the value.

The 401(k) plan buys the building from the employer for exactly:

$2 million

It is tempting to say:

"No harm. The plan paid fair value."

That misses the first legal question.

A sale of property between the plan and a party in interest falls within the prohibited-transaction framework.^[1][2]

Fair value can matter to:

• exemption conditions
• fiduciary analysis
• correction
• damages

It does not create a universal permission slip.

If no exemption covers the sale, an accurate appraisal alone does not make the transaction permissible.

Section 406(b): Fiduciary Self-Dealing

The second category is more personal.

A fiduciary generally cannot use plan authority to benefit itself, act for a party whose interests conflict with the plan in the same transaction, or receive personal consideration from someone dealing with the plan in connection with plan business.^[1][2][4]

Examples can include:

• directing plan business to generate a personal benefit
• using plan assets in the fiduciary's own interest
• taking a payment from a vendor tied to a plan transaction
• representing both sides where interests are adverse

These rules address the fiduciary's divided loyalty.

Example: Vendor Referral Payment

Assume a committee member selects a new retirement-plan vendor.

The vendor pays the committee member personally:

$25,000

because the plan signed the contract.

Even if:

• vendor pricing is competitive
• service quality is strong
• participants suffer no obvious loss

the personal payment creates a serious Section 406(b) problem.

The issue is not merely whether $25,000 was disclosed.

The issue is that a fiduciary received personal consideration connected with plan business.

Disclosure Identifies a Conflict; It Does Not Erase It

Conflict disclosure is valuable because hidden incentives are worse than visible ones.

But ERISA's prohibited-transaction rules do not operate on the premise:

"Anything is permissible if disclosed."

A fiduciary cannot assume that:

• advance committee approval
• participant disclosure
• contract language
• board consent

automatically cures self-dealing.

The transaction still needs a legal basis.

Party in Interest

ERISA uses party in interest for specified people and entities sufficiently connected to the plan.^[2][3]

Common examples include:

• sponsoring employer
• union
• plan fiduciary
• plan service provider
• specified owners and officers
• certain relatives and related entities.^[2][3]

A counterparty can be a party in interest without having done anything wrong.

The status tells you which transaction rules to test.

It is not an accusation.

Disqualified Person

Internal Revenue Code Section 4975 uses the term:

disqualified person

for the federal excise-tax prohibited-transaction regime.^[4][6]

The group includes categories such as:

• fiduciaries
• plan service providers
• covered employers
• covered employee organizations
• certain 50%-or-more owners
• specified family members and related entities.^[6]

The concepts overlap heavily with ERISA's party-in-interest rules.

They are not labels to swap casually because:

• ERISA creates fiduciary and civil-enforcement consequences
• the Code creates the Section 4975 excise-tax framework
• statutory definitions are not word-for-word identical

For a real transaction, identify which law is being applied.

Why Ordinary Service Contracts Look Prohibited at First

A recordkeeper provides services to the plan.

A service provider is a party in interest.

Section 406(a) restricts furnishing services between the plan and a party in interest.^[1][2]

If analysis stopped there, plans could barely function.

They need:

• recordkeepers
• accountants
• lawyers
• custodians
• administrators
• investment services

ERISA Section 408(b)(2) solves that problem through a statutory exemption for qualifying service arrangements.^[7]

The 408(b)(2) Service-Provider Exemption

At a high level, the exemption requires a service arrangement to involve:^[7]

• services necessary for the establishment or operation of the plan
• a reasonable contract or arrangement
• no more than reasonable compensation

For covered retirement-plan service-provider arrangements, compensation and conflict disclosures help the responsible plan fiduciary evaluate those conditions.^[7]

That is why fee disclosure is not administrative clutter.

It supports the legal basis for the service arrangement.

Example: Recordkeeper Contract

Assume a 401(k) hires a recordkeeper for:

$90 per participant per year

The recordkeeper also receives indirect compensation from investment providers.

The right analysis is not:

"The recordkeeper is a party in interest, so the contract is prohibited."

Nor is it:

"Everyone hires recordkeepers, so there is no prohibited-transaction issue."

Ask:

• Are the services necessary?
• Is the contract or arrangement reasonable?
• Were required compensation disclosures made?
• Is total direct and indirect compensation reasonable?
• Did the fiduciary evaluate conflicts?

If the Section 408(b)(2) conditions are met, the exemption can permit the arrangement.^[7]

The fiduciary still has to prudently select and monitor the provider.

Missing Service-Provider Disclosures Matter

DOL maintains a specific Fee Disclosure Failure Notice process for situations in which a covered service provider fails to provide information required under the 408(b)(2) regulation.^[7]

That detail shows how central disclosure is to the exemption structure.

A responsible fiduciary cannot simply say:

"We do not know how the vendor is paid."

Compensation information is part of determining whether the arrangement remains reasonable.

Participant Loans Are Another Exemption Story

A plan loan to a participant is a transaction between the plan and someone who can fall within the prohibited-transaction framework.

Yet 401(k) loans are common and can be lawful.

Why?

ERISA contains a conditional exemption for participant loans.^[8]

IRS guidance identifies conditions that include:

• availability under the plan
• reasonably equivalent access
• specific plan provisions
• reasonable interest
• adequate security
• compliance with applicable loan limits and repayment rules.^[8]

A compliant plan loan is not evidence that prohibited-transaction rules do not apply.

It is evidence that exemptions matter.

Example: Owner Takes a Plan Loan

Assume a business owner participates in the company 401(k).

The plan permits participant loans.

The owner takes a loan under the same written program available to other participants, with:

• permitted amount
• reasonable interest
• adequate security
• compliant repayment schedule

That can fit within the participant-loan exemption.

Now change the facts:

• owner takes a much larger loan than plan rules permit
• no repayment schedule
• favorable terms unavailable to employees
• loan remains unpaid

Calling it a "401(k) loan" does not rescue it.

The exemption depends on conditions.

Exemption Is Not the Same as Fiduciary Approval

This distinction is easy to lose.

Suppose a service contract satisfies Section 408(b)(2).

That means the prohibited-transaction restriction can be satisfied through the exemption.

It does not necessarily prove that:

• the fiduciary compared enough vendors
• the fiduciary understood the fees
• the service was worth the price
• the provider was properly monitored
• conflicts were handled prudently

DOL's exemption materials repeatedly preserve the separate Section 404 fiduciary duties.

Think of the exemption as:

permission for the transaction category

not:

certification that every fiduciary decision surrounding it was prudent.

Statutory, Class and Individual Exemptions

DOL describes three practical forms of prohibited-transaction relief.^[1][2]

Statutory exemption

Congress places the relief directly in ERISA or the Internal Revenue Code.

Examples include qualifying:

• plan service arrangements
• participant loans

Class exemption

DOL grants relief for a class of transactions when the specified conditions are satisfied.

Individual exemption

DOL can grant relief for a specific transaction or applicant under its exemption procedures.

Conditions matter in every case.

A transaction is not "under an exemption" merely because the exemption sounds similar.

Exemptions Are Condition-Driven

Suppose a class exemption requires:

• independent approval
• advance written authorization
• specified disclosures
• arm's-length terms

Missing one material condition can destroy the relief.

This is why sophisticated prohibited-transaction analysis is often less about naming the exemption and more about proving the conditions.

What About Employer Securities?

ERISA contains special rules for:

• employer securities
• employer real property

A 401(k) can therefore hold qualifying employer stock under applicable rules even though transactions involving employer interests are heavily regulated.

The fact that an asset is the employer's stock does not make every transaction involving it prohibited.

The fact that a plan is allowed to own employer stock does not make every acquisition, valuation or fiduciary decision prudent.

Specialized ESOP and employer-security rules should be analyzed separately rather than folded into the basic party-in-interest test.

Delayed Employee Contributions Can Create a Prohibited-Transaction Problem

When a 401(k) contribution is withheld from a participant's paycheck, the employer cannot treat that money as working capital indefinitely.

DOL requires participant contributions to be forwarded to the plan as soon as they can reasonably be segregated from employer assets.^[9][10]

For small plans with fewer than 100 participants, DOL provides a seven-business-day safe harbor for qualifying participant contributions and loan repayments.^[9][10]

When the employer retains participant money beyond the permitted period, the issue can become a fiduciary violation and prohibited use of plan assets.

The 15th Business Day Is Not a Universal Safe Harbor

DOL guidance states an outside rule for participant contributions, but the operative standard is earlier:

as soon as the money can reasonably be segregated from the employer's assets.

For small plans, the seven-business-day safe harbor supplies clearer protection.^[10]

A large employer that can transmit payroll deductions in three days should not assume it automatically gets to wait until the outside monthly date.

Operational capability matters.

Correction Is Not an Exemption

If a prohibited transaction happened, correction can limit the damage.

It does not rewrite the historical fact and transform the original transaction into an exempt one.

This distinction matters for:

• excise tax
• DOL enforcement
• participant claims
• Form 5500 reporting
• correction-program eligibility

Use the right verb.

Exemption asks whether the transaction was permitted.

Correction asks how to repair a transaction that was not.

IRC Section 4975 Excise Tax

For covered plans and transactions, the Internal Revenue Code generally imposes an initial prohibited-transaction excise tax of:

15% of the amount involved

for each year or part of a year in the taxable period.^[5][6]

If the transaction is not corrected within the taxable period, an additional tax of:

100% of the amount involved

can apply.^[5][6]

Form 5330 is used to report the Section 4975 tax.^[6]

The precise taxpayer depends on the statutory disqualified-person rules and the person's role in the transaction.

Do not assume the retirement plan itself simply pays the penalty from participant assets.

What Is the "Amount Involved"?

IRS guidance generally defines the amount involved as the greater of:^[5][6]

• money plus fair market value of property given
• money plus fair market value of property received

For services, the amount involved generally focuses on excess compensation.^[5]

That distinction matters.

A $1 million service contract does not automatically create a $1 million prohibited-transaction tax base merely because $10,000 of compensation was excessive.

The actual Section 4975 calculation is transaction-specific.

The Tax Can Repeat Across Years

Ongoing use of:

• money
• property
• loans
• leases

can create prohibited-transaction exposure across successive tax years under the Form 5330 rules.^[6]

That makes delay expensive.

A prohibited loan left outstanding is not necessarily a one-day historical issue.

What Counts as Correction?

IRS guidance describes correction as undoing the prohibited transaction to the extent possible while placing the plan in a financial position no worse than it would have occupied if the disqualified person had acted under the highest fiduciary standards.^[5][6]

Depending on the transaction, that can require:

• returning property
• repaying money
• paying lost earnings
• restoring profits
• unwinding an arrangement
• correcting pricing

Writing a check for the original dollar amount may not be enough if the plan lost investment earnings or someone profited from the use of plan assets.

DOL's Voluntary Fiduciary Correction Program

DOL's Voluntary Fiduciary Correction Program, or VFCP, provides defined correction methods for specified ERISA violations.^[9][10]

The current program covers categories including:

• delinquent participant contributions and loan repayments
• improper loans
• purchases and sales involving parties in interest
• improper plan expenses
• excessive or unnecessary compensation
• certain valuation problems.^[10]

Successful use of the program depends on the transaction, eligibility, complete correction and required documentation.

The 2025 VFCP Update Matters

DOL's latest major VFCP update became effective:

March 17, 2025.^[9][10]

It added a self-correction component for two categories:

• qualifying delinquent participant contributions and participant loan repayments
• eligible inadvertent participant-loan failures.^[9][10]

For delinquent contributions and loan repayments, the current self-correction component includes conditions such as:

• lost earnings of $1,000 or less
• remittance within 180 calendar days of withholding or receipt
• calculation and restoration of lost earnings
• required notice and record retention
• no applicable investigation disqualifying use of the program.^[10]

Those limits are specific.

"VFCP allows self-correction" is too broad.

PTE 2002-51 and Excise-Tax Relief

DOL's related PTE 2002-51 can provide conditional relief from certain Section 4975 excise taxes for specified transactions corrected through the VFCP when every requirement is met.^[10]

The current exemption covers six transaction categories described by DOL, including qualifying:

• late participant contributions or loan repayments
• certain loans to disqualified persons
• certain purchases or sales
• specified sale-leaseback transactions
• certain illiquid-asset transactions
• certain improper settlor-expense payments.^[10]

VFCP correction and excise-tax relief are related but not identical.

Confirm both.

Five Transactions That Deserve Immediate Scrutiny

1. Plan buys property from employer or owner

Do not stop at the appraisal.

Identify the exemption.

2. Fiduciary receives personal compensation from a plan vendor

Self-dealing rules are directly implicated.

3. Employer holds employee deferrals in operating cash

Check deposit timing immediately.

4. Owner or executive receives special loan terms

Compare the participant-loan exemption conditions and written plan terms.

5. Service provider compensation is opaque

The responsible fiduciary needs enough direct and indirect compensation information to evaluate the 408(b)(2) arrangement.^[7]

These are transaction-specific problems. Generic conflict policies do not answer them.

Party-in-Interest Transaction vs. Fiduciary Self-Dealing

The two sections can apply to the same facts.

A Transaction Can Pass One Test and Fail Another

Suppose:

• plan hires a service provider
• service is necessary
• contract is reasonable
• compensation is reasonable
• Section 408(b)(2) conditions are satisfied

Now assume the fiduciary choosing the provider secretly receives a personal kickback.

The service arrangement may satisfy one prohibited-transaction exemption.

The fiduciary's personal payment raises a separate self-dealing problem.

Compliance is not a single checkbox.

Questions Participants Actually Ask

Can a 401(k) do business with the employer?

Sometimes, but transactions involving the employer fall within strict ERISA rules. An applicable statutory or administrative exemption must cover the transaction when Section 406 applies.^[1][2]

Is a transaction legal if the plan paid fair market value?

Not automatically. Fair market value does not by itself exempt a sale, lease, loan or other transaction with a party in interest.

Why can the plan pay a recordkeeper if the recordkeeper is a party in interest?

Because ERISA Section 408(b)(2) can exempt qualifying necessary services under a reasonable arrangement for no more than reasonable compensation.^[7]

Is a 401(k) participant loan a prohibited transaction?

A plan loan can fall within the prohibited-transaction framework, but a statutory exemption permits qualifying participant loans when the applicable requirements are met.^[8]

What is self-dealing?

It is fiduciary conduct involving use of plan authority or assets for the fiduciary's own interest, or other conflicted conduct restricted by ERISA Section 406(b).^[1][2]

Does disclosure cure self-dealing?

No. Disclosure can be required and useful, but it is not a universal exemption from ERISA's conflict rules.

What is the initial prohibited-transaction excise tax?

IRC Section 4975 generally imposes 15% of the amount involved for each year or part of a year in the taxable period on the liable disqualified person.^[5][6]

What happens if the transaction is not corrected?

An additional tax equal to 100% of the amount involved can apply under Section 4975.^[5][6]

What is Form 5330?

It is the IRS form used to report several employee-plan excise taxes, including the Section 4975 prohibited-transaction tax.^[6]

Can a prohibited transaction be corrected voluntarily?

Potentially. DOL's VFCP provides correction methods and enforcement relief for specified eligible violations; the exact requirements depend on the transaction.^[9][10]

The Test That Matters

When plan money touches an insider, do not begin with:

"Was the deal fair?"

Begin with:

"Why is the plan legally allowed to enter this transaction with this person?"

Then ask whether the price, process and conflict handling were prudent.

That order catches the mistake that causes many prohibited-transaction analyses to fail: treating commercial reasonableness as though it were the exemption.

It is not.

Sources & References

1. U.S. Department of Labor: Exemption Procedures under Federal Pension Law
2. U.S. Department of Labor: ERISA Fiduciary Advisor — Prohibited Transactions
3. U.S. Department of Labor: Retirement Responsibilities for Employers — Avoid Prohibited Transactions
4. IRS: Retirement Topics — Prohibited Transactions
5. IRS: Retirement Topics — Tax on Prohibited Transactions
6. IRS: Instructions for Form 5330
7. U.S. Department of Labor: Fee Disclosure Failure Notice — ERISA 408(b)(2)
8. IRS: 401(k) Plan Fix-It Guide — Participant Loans
9. U.S. Department of Labor: Voluntary Fiduciary Correction Program
10. U.S. Department of Labor: Fact Sheet — Voluntary Fiduciary Correction Program

Educational Disclaimer

ROIStreet publishes educational content about retirement-plan fiduciary and tax rules. This article is not legal, tax, fiduciary or compliance advice. Prohibited-transaction analysis is fact-specific; an exemption may depend on transaction structure, counterparty status, compensation, disclosures, timing, plan documents and other conditions.

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