IRS Form 15091 Guide: Benefit Assurance Plan Termination

1. Introduction: What is Form 15091?

IRS Form 15091, officially titled Benefit Assurance, is an administrative compliance certification published by the Internal Revenue Service (IRS). It is governed by Employee Plans (EP), an operating branch within the IRS Tax Exempt and Government Entities (TE/GE) Division.

This form is used during the formal termination of a qualified retirement plan, such as a defined benefit pension plan or defined contribution plan. Form 15091 serves as an official written certification that an employer or plan administrator signs under penalties of perjury to confirm that all plan liabilities owed to participants and beneficiaries have been completely satisfied through the purchase of guaranteed annuity contracts or the payout of lump-sum distributions.

2. Purpose of the Form: Why Does Form 15091 Exist?

Under federal pension law and Internal Revenue Code Section 401(a)(2), a qualified retirement plan trust must be maintained for the exclusive benefit of workers. An employer is legally prohibited from taking back any remaining retirement funds until every single employee and retiree has received their full accrued retirement benefits.

When an employer terminates a retirement plan—especially an overfunded defined benefit plan—excess assets may remain after all benefit promises are funded. Form 15091 exists to verify that the employer did not take an illegal reversion and to coordinate tax compliance:

• Certifying Full Benefit Satisfaction: It provides a binding legal statement to IRS review staff that all participant accounts have been paid out or transferred to irrevocable commercial annuity contracts.
• Tracking Employer Asset Reversions: If excess pension assets revert to the employer after all benefits are paid, the employer must disclose the exact date and dollar amount on Form 15091.
• Enforcing Section 4980 Excise Taxes: Employer reversions are subject to a steep 20% or 50% federal excise tax under Internal Revenue Code Section 4980. Form 15091 alerts the IRS to verify that the employer reported this income and paid the required excise tax.

3. Who Needs to File This Form?

Form 15091 is not a routine tax filing for active businesses. It is required in specific plan termination situations:

• Employers, business owners, and plan administrators who are terminating a qualified retirement plan and have been requested by IRS Technical or Review Staff to provide benefit assurance.
• Plan sponsors who filed IRS Form 5310 (Application for Determination for Terminating Plan) and received Letter 1132 requesting Form 15091 as a condition of receiving a favorable termination letter.
• Sponsors of defined benefit plans that experienced an asset reversion, where surplus funds returned to the employer after satisfying all participant liabilities.
• Authorized plan fiduciaries closing out a terminated plan’s affairs with the IRS Employee Plans division.

4. Who Is Exempt / Not Required to File?

Because Form 15091 is an audit-level closing document, many retirement plans and employers do not need to submit it:

• Ongoing Retirement Plans: Active 401(k), pension, or profit-sharing plans that are continuing regular operations have no reason to use this form.
• Terminating Plans Without an IRS Request: If an employer terminates a defined contribution plan (such as a standard 401(k) plan with zero reversions) and does not apply for a determination letter, Form 15091 is not automatically required unless requested by the IRS.
• Individual Plan Participants: Employees and retirees receiving distributions never complete or sign Form 15091.
• Governmental and Church Plans: Certain non-electing church plans and governmental plans that are exempt from private-sector funding and reversion rules do not use this form.

5. When to File: Deadlines and Frequency

Form 15091 is an event-based, one-time closing certification rather than an annual recurring tax return. It is completed only after all participant benefits have been fully distributed.

The form is typically enclosed with IRS Letter 1132 during the review of a plan termination. The plan sponsor must complete and return Form 15091 to the IRS within the response window specified in the letter (typically 30 calendar days, or as soon as final asset distributions and annuity purchases are finalized). Because the form requires the sponsor to certify that all liabilities have been satisfied, it must be signed only after all lump sums have cleared or annuity contracts have been executed.

6. Where and How to File

Form 15091 is a specialized document that is routed directly to IRS Employee Plans review teams rather than standard tax return processing centers:

• Paper Mailing: The completed, signed Form 15091 must be mailed directly to the specialized IRS Tax Exempt and Government Entities unit at the designated IRS address as per instructions (specifically the CPC:C&CA Referrals Group in Dallas, Texas).
• Separate from Form 5500: Do not attach Form 15091 to your final Form 5500 or Form 5500-SF. Form 5500 is filed electronically through the Department of Labor’s EFAST2 system, while Form 15091 is mailed directly to the IRS.
• Proof of Delivery: Always send the form via certified mail with return receipt requested to maintain verified proof that the certification was delivered to the IRS review staff.

7. Step-by-Step Instructions to Fill Form 15091

Form 15091 is a concise, single-page certification document. While brief, every entry must tie directly to the plan’s final distribution ledgers and corporate resolutions. The table below outlines each section of the form.

Section	Field Description	Required Information & Records
Header	Plan & Sponsor Details	Date, Employer Identification Number (EIN), Document Locator Number (DLN), and address.
Contact Info	Representative Contact	Name of the person to contact and direct telephone number for audit inquiries.
Plan Info	Plan Identification	Exact legal plan name and 3-digit plan sequence number (e.g., 001).
Event Dates	Termination & Reversion	Date of termination, date(s) excess assets were received, and exact dollar amount.
Benefit Payouts	Annuities & Lump Sums	Dates and amounts for purchased guaranteed annuities and paid lump-sum distributions.
Certification	Execution Block	Signature, corporate title, and execution date certifying full benefit satisfaction.

Part 1: Plan Sponsor and Case Identification

Enter the current date and the plan sponsor’s nine-digit Employer Identification Number (EIN). Provide the Document Locator Number (DLN) if one was pre-printed on your IRS correspondence. Enter the legal business address, the name of a primary contact person (such as the benefits manager or CFO), their direct telephone number, the formal legal plan name, and the three-digit plan number.

Part 2: Plan Termination and Excess Assets (Reversions)

This section documents when the plan ended and whether the employer received surplus funds:

• Date of Termination: Enter the official termination date adopted in the corporate board resolution or plan amendment.
• Excess Assets Received: If the plan had surplus funds that reverted to the employer after funding all benefits, enter the date(s) the funds were transferred to the company and the exact dollar amount. If no excess assets reverted, enter zero or “N/A.”

Part 3: Annuity Purchases and Lump-Sum Distributions

You must specify how participant liabilities were satisfied:

• Guaranteed Annuity Contracts: Enter the date(s) commercial annuity contracts were purchased from an insurance carrier and the total dollar amount paid.
• Lump-Sum Distributions: Enter the date(s) lump-sum cash distributions or direct rollovers to IRAs were disbursed to participants and the total dollar amount paid.

Part 4: The Benefit Assurance Certification

The core of Form 15091 is a sworn legal statement: “I certify that the above plan’s liabilities to all plan participants have been satisfied by the purchase of guaranteed annuity contracts or the payment of lump sum distributions.” An authorized corporate officer, plan administrator, or trustee must sign, provide their professional title, and date the form. Signing this form without having distributed all benefits constitutes federal perjury.

8. Required Documents and Information Needed Before Filling

Before completing Form 15091, assemble the following retirement plan closing records:

• The formal board of directors resolution or corporate amendment establishing the plan termination date.
• Contracts and binding binders from commercial life insurance carriers proving the purchase of guaranteed irrevocable annuity contracts.
• Trustee bank ledgers, wire transfer receipts, and check registers verifying that all lump sums and rollovers were disbursed.
• Actuarial valuation reports showing the calculation of final plan liabilities and excess assets (for defined benefit plans).
• A copy of IRS Letter 1132 or correspondence from the IRS Employee Plans specialist handling your case.
• A signed Form 2848 (Power of Attorney) if an ERISA attorney or consulting actuary is submitting the form on your behalf.

9. Common Mistakes to Avoid

Failing to handle Form 15091 properly can delay your plan’s final determination letter or trigger an audit. Watch out for these frequent mistakes:

• Signing Before All Funds Are Disbursed: You cannot sign Form 15091 if outstanding distribution checks remain uncashed or if missing participants have not been resolved. All liabilities must be completely satisfied before certification.
• Treating Form 15091 as a Substitute for Form 5500: Form 15091 does not replace your annual reporting requirements. You must still file a final Form 5500 indicating that all plan assets have been reduced to zero.
• Failing to Report Reversions on Form 5330: Reporting an excess asset reversion on Form 15091 without filing Form 5330 to pay the Section 4980 excise tax triggers automatic IRS audit referrals and substantial penalty notices.
• Mailing to the Wrong IRS Processing Center: Form 15091 must be mailed to the specialized TE/GE Referrals Group in Dallas, Texas. Sending it to a general IRS tax processing center will result in lost records.
• Unauthorized Signatures: Form 15091 must be signed by an authorized plan administrator or corporate officer. Signatures by unauthorized third parties lacking power of attorney will be rejected.

10. Penalties for Non-Filing or Errors

Failing to submit Form 15091 when requested or misstating asset reversions carries severe financial and legal penalties:

• Denial of Favorable Determination Letter: If the IRS requested Form 15091 under Letter 1132 and you fail to return it, the IRS will refuse to issue a favorable determination letter on plan termination, leaving the plan’s qualified status uncertain.
• Section 4980 Excise Tax Penalties: Failing to report an employer asset reversion triggers a mandatory 20% or 50% excise tax under Section 4980, plus failure-to-file and failure-to-pay penalties under Section 6651.
• Plan Disqualification: If an employer takes an asset reversion before all participant benefits are fully funded, the plan violates the exclusive benefit rule under Section 401(a)(2), which can disqualify the plan retroactively and eliminate past employer tax deductions.
• Federal Perjury Charges: Falsely certifying on Form 15091 that all liabilities were satisfied when participants were unpaid is a federal crime punishable under 26 U.S.C. Section 7206.

11. Related Forms or Schedules

Form 15091 operates within an interconnected system of federal pension termination and compliance documents:

• Form 5310: Application for Determination for Terminating Plan (the primary application used to request IRS approval of plan termination).
• Form 5500 / Form 5500-SF: Annual Return/Report of Employee Benefit Plan (filed as the final return once assets hit zero).
• Form 5330: Return of Excise Taxes Related to Employee Benefit Plans (used to calculate and pay the Section 4980 excise tax on asset reversions).
• Form 1099-R: Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc.
• IRS Letter 1132: Proposed Favorable Determination Letter on Plan Termination.
• Form 2848: Power of Attorney and Declaration of Representative.

12. Frequently Asked Questions (FAQs)

1. What is the difference between Form 15091 and Form 5310?

Form 5310 is a comprehensive application that plan sponsors submit to request an IRS ruling that a plan termination does not adversely affect its tax-qualified status. Form 15091 is a closing certification submitted later to prove that all liabilities were actually paid and to report any employer asset reversions.

2. Does filing Form 15091 replace our plan’s final Form 5500?

No. Form 15091 is an internal IRS certification and does not replace Form 5500. The plan sponsor must continue filing Form 5500 annually until all plan assets have been completely distributed, at which point a final Form 5500 is filed.

3. What is an “employer reversion” on Form 15091?

An employer reversion occurs when an employer terminates a defined benefit pension plan that has more money in its trust than needed to satisfy all benefit obligations. Any remaining surplus cash that returns to the employer is a reversion and must be reported on Form 15091.

4. What are guaranteed annuity contracts?

Guaranteed annuity contracts are group annuity policies purchased from an authorized commercial insurance company. Once purchased, the insurance company assumes the permanent legal obligation to pay monthly pension benefits directly to retirees, relieving the employer of further liability.

5. What happens if a participant cannot be located during plan termination?

Under federal guidelines, an employer cannot simply take the missing participant’s funds. The plan administrator must make diligent search efforts and either transfer the benefit to the Pension Benefit Guaranty Corporation (PBGC) Missing Participants Program, establish an individual rollover IRA, or follow Department of Labor unclaimed benefit rules before certifying full benefit satisfaction.

6. Can Form 15091 be submitted electronically?

Currently, Form 15091 is submitted on paper directly to the IRS Tax Exempt and Government Entities referrals office in Dallas, Texas, as specified in the form’s instructions.

13. Conclusion: Key Takeaways

IRS Form 15091 provides the final regulatory assurance that a terminating retirement plan has met all legal obligations to its workforce. By certifying under penalties of perjury that all participant benefits have been satisfied through annuity purchases or lump-sum distributions, plan sponsors complete the termination process and verify proper handling of surplus assets.

Because plan terminations involve complex actuarial computations, strict fiduciary standards, and severe excise taxes on employer reversions, employers should work closely with experienced ERISA attorneys, actuaries, and third-party administrators when completing and executing Form 15091.