Understanding IRS Form 921-P: Consent Fixing Period of Limitation on Assessment for TEFRA Partnerships

1. Introduction – What is Form 921-P?

IRS Form 921-P, officially titled “Consent Fixing Period of Limitation on Assessment of Income and Profits Tax,” is a specialized tax agreement used by partnerships subject to TEFRA (Tax Equity and Fiscal Responsibility Act of 1982) audit rules. It establishes a formal legal agreement between a partnership and the Internal Revenue Service (IRS).

The form is governed by the IRS, an agency of the U.S. Department of the Treasury. Signed by the Tax Matters Partner (TMP), Form 921-P extends the time limit for the IRS to assess income tax deficiencies related to estimated future common improvement expenses in real estate development projects.

2. Purpose of the Form – Why Does Form 921-P Exist?

Real estate development partnerships often sell residential lots or commercial properties before all common project infrastructure—such as roads, utilities, drainage systems, or community centers—is fully built. Under Revenue Procedure 92-29, partnerships can elect the “alternative cost method,” which allows them to include estimated future common improvement expenses in the cost basis of sold properties, lowering immediate taxable gains passed to partners.

Because these future expenses are based on estimates, the IRS requires adequate time to audit actual expenses after the real estate project is completed. Under TEFRA audit rules, partnership-level items are reviewed in a unified proceeding rather than through separate partner audits.

Form 921-P extends the statute of limitations under Internal Revenue Code Section 6229(b)(1) for assessing tax attributable to TEFRA partnership items related to the alternative cost method. This allows real estate partnerships to claim immediate basis adjustments while giving the IRS sufficient time to audit final project expenses later.

3. Who Needs to File This Form

Form 921-P is executed on behalf of a partnership rather than by individual partners. You will need to execute Form 921-P if your business meets the following criteria:

• TEFRA Partnerships: Partnerships governed by TEFRA consolidated audit rules (generally applying to tax years beginning prior to January 1, 2018).
• Real Estate Developers Using Rev. Proc. 92-29: Partnerships electing to use the alternative cost method to allocate estimated future common improvement expenses to sold property cost bases.
• Tax Matters Partner Execution: Partnerships where the Tax Matters Partner (TMP) is requested by an IRS official to enter into a consent agreement regarding estimated expense allowances.

4. Who Is Exempt / Not Required to File

Form 921-P is limited strictly to TEFRA partnerships operating under real estate alternative cost rules. Your business is exempt from filing Form 921-P if any of the following apply:

• BBA Partnerships: Partnerships governed by the Bipartisan Budget Act of 2015 audit regime (generally tax years 2018 and later) use Form 921-M instead.
• Non-TEFRA Flow-Through Entities: S-Corporations and non-TEFRA pass-through entities execute Form 921-A.
• Individual Investors: Individual partners in non-TEFRA partnerships sign Form 921-I in their personal capacity.
• Sole Proprietorships: Individual developers operating without a partnership structure execute Form 921.
• Standard Accounting Method Users: Partnerships that calculate basis using actual expenses as paid or incurred without estimating future costs.

5. When to File

Form 921-P is an event-driven agreement executed at key milestones during a real estate project rather than an annual recurring tax filing.

The form is completed when the TEFRA partnership requests permission to use the alternative cost method under Revenue Procedure 92-29 or when requested by an IRS agent during return examination. Form 921-P extends the assessment statute under Section 6229(b)(1) up to a specified date, typically one year after the partnership files its tax return for the tax year of expected project completion. If a notice of final partnership administrative adjustment is mailed before that date, the time frame is extended further by statute.

6. Where and How to File

Form 921-P is a formal legal agreement requiring valid signatures from the designated Tax Matters Partner (or authorized representative) and an authorized IRS official. It cannot be filed through standard electronic tax return software.

Partnerships submit Form 921-P via paper mail or secure electronic channels directly to the IRS representative managing their file. You must return the signed document to the specific IRS address as per instructions provided in your official IRS correspondence or examination letter. Do not send Form 921-P to general tax return processing centers unless explicitly directed.

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

Form 921-P requires precise details regarding the partnership, the Tax Matters Partner, and the real estate development project. The table below outlines the core lines on the form.

Form Section	Field Name	Instruction / Description
Header Section	Partnership Name & Address	Enter the full legal name and current mailing address of the TEFRA partnership.
Identification	Employer Identification Number (EIN)	Provide the partnership’s official nine-digit EIN.
TMP Details	Tax Matters Partner Name	Enter the full legal name and address of the designated Tax Matters Partner.
Project Section	Real Estate Project Covered	Provide the official name, physical location, and legal property description covered under Rev. Proc. 92-29.
Tax Period	Expected Completion Date	State the ending tax year date when common project improvements are scheduled for completion.
Signatures	TMP & IRS Signatures	Requires the signature, title, and date of the Tax Matters Partner and the authorized IRS executive.

Detailed Filling Steps

1. Identify the TEFRA Partnership: Complete the header with the legal name, main business address, and EIN of the partnership.
2. Provide TMP Details: Fill in the name and address of the designated Tax Matters Partner authorized to bind the partnership under TEFRA rules.
3. Describe the Real Estate Project: Clearly state the project name and location to ensure the agreement is restricted solely to those operations.
4. Enter Target Completion Year: Specify the expected completion tax year for all common improvements.
5. Sign and Return: The Tax Matters Partner must sign and date the form. Attach Form 2848 if an external representative is authorized to assist.

8. Required Documents/Information Needed Before Filling

Before filling out Form 921-P, gather the following records and tax documents:

• Partnership Identification: Partnership legal name, address, and Employer Identification Number (EIN).
• Tax Matters Partner Designation: Formal documentation verifying the appointment of the Tax Matters Partner under TEFRA provisions.
• Revenue Procedure 92-29 Election: Copy of the partnership’s election statement to use the alternative cost method.
• Real Estate Project Contracts: Property plans, legal land descriptions, and itemized estimated cost schedules for future common improvements.
• Form 2848 (Power of Attorney): Required if a CPA or tax attorney is executing the document on behalf of the Tax Matters Partner.

9. Common Mistakes to Avoid

Submitting an improper Form 921-P can lead to administrative complications or loss of estimated expense deductions. Watch out for these common mistakes:

• Unauthorized Signer: Allowing a general partner to sign who has not been properly designated as the Tax Matters Partner under TEFRA rules.
• Using the Wrong Form: Signing Form 921-P for post-2017 BBA partnerships instead of Form 921-M, or for non-TEFRA entities requiring Form 921-A.
• Incomplete Project Information: Leaving property description fields vague, which creates uncertainty about which real estate assets are covered.
• Incorrect Tax Identification Numbers: Entering partner Social Security Numbers instead of the partnership’s Employer Identification Number.
• Assuming General Audit Extension: Misinterpreting the form as a general extension for all partnership items, when it is strictly limited to alternative cost method items.

10. Penalties for Non-Filing or Errors

Form 921-P is a voluntary consent agreement, so there are no direct monetary late-filing fees. However, refusing to execute Form 921-P when using the alternative cost method carries significant tax consequences:

• Disallowance of Alternative Cost Method: The IRS will disallow estimated future common improvement expenses from the property’s cost basis.
• Increased Partner Tax Liabilities: Reduced property basis increases partnership taxable gains, resulting in immediate deficiency assessments passed through to individual partners on Schedules K-1.
• Interest and Penalties: Partners will owe statutory interest accrued retroactively from the original tax return due date, along with potential accuracy-related penalties.

11. Related Forms or Schedules

Partnerships managing Form 921-P frequently deal with these related federal tax forms:

• Form 921: Consent to Extend the Time to Assess Income Tax (for sole proprietors).
• Form 921-A: Consent Fixing Period of Limitation on Assessment of Income and Profits Tax (for non-TEFRA entities).
• Form 921-I: Consent Fixing Period of Limitation on Assessment of Income and Profits Tax (for pass-through investors).
• Form 921-M: Consent Fixing Period of Limitation to Make Partnership Adjustments (for BBA partnerships).
• Form 1065: U.S. Return of Partnership Income.
• Schedule K-1: Partner’s Share of Income, Deductions, Credits, etc.
• Form 2848: Power of Attorney and Declaration of Representative.

12. Frequently Asked Questions

1. What is the primary purpose of IRS Form 921-P?

Form 921-P extends the statute of limitations under Section 6229(b)(1) for the IRS to assess income taxes attributable to estimated future real estate improvement expenses under Revenue Procedure 92-29 for TEFRA partnerships.

2. Who is authorized to sign Form 921-P?

Form 921-P must be signed by the designated Tax Matters Partner (TMP) or an authorized tax representative holding a valid Power of Attorney (Form 2848).

3. How does Form 921-P differ from Form 921-M?

Form 921-P applies to TEFRA partnerships (generally pre-2018 tax years), while Form 921-M applies to partnerships subject to the Bipartisan Budget Act (BBA) audit regime (2018 and later tax years).

4. What is a TEFRA partnership?

A TEFRA partnership is a partnership governed by unified audit rules created under the Tax Equity and Fiscal Responsibility Act of 1982, where partnership items were audited at the entity level through a designated Tax Matters Partner.

5. What happens if a TEFRA partnership refuses to sign Form 921-P?

If the partnership refuses to sign Form 921-P, the IRS will deny the election to use the alternative cost method. Estimated future expenses will be removed from property cost basis, resulting in immediate tax deficiencies for all partners.

6. Can Form 921-P be submitted electronically through standard tax software?

No. Form 921-P must be submitted via paper mail or secure digital delivery directly to the IRS agent handling the partnership’s consent agreement.

13. Conclusion – Key Takeaways

IRS Form 921-P is a crucial administrative agreement for TEFRA partnerships involved in real estate development that elect the alternative cost method under Revenue Procedure 92-29. By executing Form 921-P, Tax Matters Partners enable their partnerships to claim upfront cost basis adjustments for estimated future common improvement expenses, lowering immediate taxable gains allocated to partners. In exchange, the partnership grants the IRS an extended time frame under Section 6229(b)(1) to verify actual costs after project completion. Ensuring that Form 921-P is properly signed by the Tax Matters Partner and submitted on time protects the partnership’s tax elections and avoids unexpected back tax assessments.