The IRS Form 8983 Guide: Tax-Exempt Partner Certification

Introduction – What Is Form 8983?

IRS Form 8983, titled Certification of Partner Tax-Exempt Status for Modification Under IRC Section 6225(c)(3), is a specialized federal tax compliance document administered by the Internal Revenue Service (IRS) and the U.S. Department of the Treasury. It operates under the centralized partnership audit regime created by the Bipartisan Budget Act of 2015 (BBA).

When the IRS audits a partnership governed by BBA rules and proposes tax adjustments, it calculates a default tax bill known as an “imputed underpayment.” Form 8983 is a sworn certification signed by a tax-exempt partner—such as a charity, university endowment, pension fund, or governmental entity—verifying its non-taxable status so the partnership can legally reduce or eliminate its audit assessment.

Purpose of the Form – Why Does Form 8983 Exist?

Under default BBA audit rules, the IRS computes a partnership’s imputed underpayment by multiplying all net adjustments by the highest statutory federal tax rate (typically the top individual rate of 37 percent). This calculation assumes that every partner is a taxable individual, ignoring the reality that non-profit organizations and institutional investors are often partners in the business.

If the partnership paid tax on income allocable to a tax-exempt partner, that non-profit entity would indirectly bear a tax burden from which it is statutorily exempt. Internal Revenue Code Section 6225(c)(3) solves this problem by allowing the partnership to request a “modification” to remove the tax on adjustments allocated to exempt partners. Form 8983 provides the official proof required by the IRS, certifying that the partner was legally tax-exempt during the audited year and confirming that the income was not subject to Unrelated Business Taxable Income (UBTI).

Who Needs to File This Form?

Form 8983 is completed by tax-exempt organizations that held an ownership interest in an audited BBA partnership. You must complete and execute Form 8983 if your organization meets the following criteria:

• Reviewed-Year Partner: Your organization was a direct partner (or an indirect partner through a tiered pass-through entity) during the partnership tax year audited by the IRS (the “reviewed year”).
• Legally Tax-Exempt: Your entity is recognized as tax-exempt under Internal Revenue Code Section 501(a), Section 115 (state and local government entities), or foreign government exemption rules.
• Partner in an Audited Entity: The partnership received a Notice of Proposed Partnership Adjustment (NOPPA) and is filing Form 8980 to request a tax-exempt modification under Section 6225(c)(3).
• Exemption from UBTI: The audit adjustments allocated to your organization do not constitute Unrelated Business Taxable Income under Section 511.

Who Is Exempt / Not Required to File?

Many entities that invest in partnerships do not file Form 8983. An organization is exempt or not required to complete this form if:

• Taxable Partners: Standard taxable individuals, C corporations, and taxable trusts never file Form 8983 (corporate partners seeking lower rates use separate modification procedures).
• 100 Percent UBTI Allocations: If the partnership’s audit adjustments represent income from an active commercial trade or debt-financed property that is fully taxable to the exempt organization as UBTI, the partner cannot claim exemption on Form 8983.
• No Modification Requested: The partnership agrees to pay the imputed underpayment at the entity level without requesting modifications, or opts for a Section 6226 push-out election (Form 8986).
• BBA Opt-Out Partnerships: Partnerships that made a valid election under Section 6221(b) to opt out of the centralized audit rules.

When to File Form 8983

Form 8983 is an event-driven certification governed by the partnership’s statutory modification timeline. Under Section 6225(c)(7), the partnership has 270 calendar days from the date the IRS mails the Notice of Proposed Partnership Adjustment (NOPPA) to submit its complete modification request on Form 8980.

Because the Partnership Representative must compile all supporting partner schedules before submitting Form 8980, the tax-exempt partner must complete Form 8983 and deliver it to the Partnership Representative well before the 270-day deadline expires (or before the end of any approved extension under Form 8984).

Where and How to File

Crucial Rule: The tax-exempt partner does not mail Form 8983 directly to an IRS service center. Form 8983 is submitted through a coordinated two-step process:

• Step 1 (Partner to Representative): An authorized officer of the tax-exempt entity signs Form 8983, attaches a copy of the entity’s IRS exemption determination letter, and delivers the package directly to the Partnership Representative (PR).
• Step 2 (Representative to IRS): The Partnership Representative attaches Form 8983 to master Form 8980 and submits the entire package to the assigned IRS audit group via the IRS BBA digital portal or to the designated IRS address as per instructions on the NOPPA.

Step-by-Step Instructions to Fill Form 8983

Form 8983 is a two-page certification that establishes the partner’s legal exemption, reviews the nature of the partnership adjustments, and collects a sworn declaration.

Header Information

Enter the legal name of the audited partnership, its Employer Identification Number (EIN), the audited tax year(s) under review, and the exact mailing date of the NOPPA from the IRS.

Part-by-Part Section Breakdown

Part & Section	Form Focus	Filing Directions
Part I	Tax-Exempt Partner Profile	Enter the legal name of the tax-exempt entity, its EIN, mailing address, telephone number, and the contact information of the primary officer or trustee.
Part II	Exemption Grounds & UBTI	Identify the specific tax code section granting exemption (e.g., Section 501(c)(3) or Section 115). Enter the date of the IRS exemption determination letter. Certify that the exemption was active during the audited year and declare whether any adjustments are subject to UBTI.
Part III	Allocation of Adjustments	Report the total dollar amount of audit adjustments allocated to the partner, the portion that is completely exempt from federal tax, and the portion (if any) subject to UBTI.
Part IV	Perjury Declaration	An authorized officer or trustee of the tax-exempt entity signs and dates the form under penalties of perjury, certifying that all statements and attached exhibits are true and complete.

Required Documents and Information Needed Before Filling

To substantiate your tax-exempt status during an IRS examination, assemble the following records before completing Form 8983:

• IRS Exemption Determination Letter: The official letter issued by the IRS recognizing the organization’s tax-exempt status under Section 501(a) or relevant code sections.
• Form 886-A (Explanation of Items): The audit schedule from the NOPPA detailing the specific items and dollar amounts adjusted by the IRS.
• Reviewed-Year Form 990 / Form 990-T: Copies of the organization’s annual information returns filed for the audited year to verify reporting consistency and UBTI history.
• Partnership Schedule K-1: The original Schedule K-1 issued to the tax-exempt partner for the audited year.
• Signing Authority Records: Documentation verifying that the individual signing Part IV holds the legal authority to bind the non-profit organization.

Common Mistakes to Avoid

Errors on Form 8983 can cause the IRS to reject the modification, costing the partnership substantial tax savings. Watch out for these frequent mistakes:

• Mailing Directly to the IRS: Sending Form 8983 to an IRS service center as an isolated document. Form 8983 must be delivered to the Partnership Representative to be attached to Form 8980.
• Ignoring the UBTI Restriction: Claiming a full exemption when the partnership income was derived from debt-financed property or an active business trade. Any portion of the adjustment subject to UBTI is taxable and cannot be excluded from the imputed underpayment.
• Missing the Exemption Letter: Forgetting to attach a copy of the official IRS tax-exempt determination letter. Without documentation of exemption, the IRS will reject the schedule.
• Missing the 270-Day Window: Failing to deliver Form 8983 to the Partnership Representative in time for the PR to submit Form 8980 before the statutory modification window closes.
• Unauthorized Signatures: Having an outside tax preparer or unauthorized staff member sign Part IV. The form must be signed by an officer, director, or trustee of the exempt organization.

Penalties for Non-Filing or Errors

While Form 8983 is a voluntary certification that does not carry direct administrative fines for non-filing, the financial fallout of failing to submit it is severe:

• Disallowance of Tax-Exempt Relief: If Form 8983 is missing or rejected, the IRS will calculate the imputed underpayment as if the tax-exempt partner were a high-earning individual taxed at the top 37 percent rate.
• Depletion of Partnership Value: Forcing the partnership to pay taxes on behalf of an exempt partner reduces the partnership’s capital and cash reserves, directly diminishing the value of the non-profit’s investment.
• Perjury Sanctions: Form 8983 is signed under penalties of perjury. Falsifying tax-exempt standing or concealing UBTI liabilities constitutes a federal crime under Title 18 of the United States Code.

Related Forms and Schedules

Form 8983 functions within a coordinated group of BBA partnership audit forms:

• Form 8980: Partnership Request for Modification of Imputed Underpayments Under IRC Section 6225(c) (the master modification request to which Form 8983 is attached).
• Form 8982: Affidavit for Partner Modification Under IRC Section 6225(c)(2) (used when taxable partners amend returns or pay tax).
• Form 8984: Extension of the Taxpayer Modification Submission Period Under Section 6225(c)(7).
• Form 990-T: Exempt Organization Business Income Tax Return (used by exempt entities to report and pay tax on UBTI).
• Form 1065 / Schedule K-1: Partner’s Share of Income, Deductions, Credits, etc.

Frequently Asked Questions

Why does a charity or endowment need to complete Form 8983?

Under BBA audit rules, the IRS taxes all partnership audit adjustments at the highest rate by default. Form 8983 allows the tax-exempt organization to certify its status so the partnership does not pay taxes on income that belongs to a non-taxable entity.

Does the tax-exempt partner send Form 8983 directly to the IRS?

No. The tax-exempt partner must complete Form 8983 and send it directly to the Partnership Representative. The representative packages all partner certifications with master Form 8980 and submits them to the IRS examination team.

What happens if some of the partnership’s income is subject to UBTI?

The partner must disclose the taxable portion in Part III. The portion subject to Unrelated Business Taxable Income remains in the partnership’s imputed underpayment calculation, while the truly exempt portion is excluded.

What types of entities qualify to use Form 8983?

Qualifying entities include Section 501(c)(3) charities, private foundations, educational endowments, qualified employee pension trusts under Section 401(a), state and municipal government entities under Section 115, and qualifying foreign exempt entities.

Can a foreign government or foreign pension fund use Form 8983?

Yes. Foreign governments and qualifying foreign pension funds that are exempt from U.S. tax under Section 892 or applicable international tax treaties can complete Form 8983 to certify their tax-exempt status.

What happens if our organization misses the 270-day deadline?

If Form 8983 is not submitted before the partnership’s 270-day modification period expires, the IRS cannot grant the modification. The partnership will be forced to pay the full imputed underpayment at the maximum 37 percent rate.

Conclusion – Key Takeaways Summarized

IRS Form 8983 is an essential legal shield that protects tax-exempt organizations from indirectly paying federal income taxes resulting from a partnership audit. By formally certifying tax-exempt status under Section 6225(c)(3), it allows the partnership to remove non-taxable adjustments from its imputed underpayment.

To ensure your exemption is granted, review the audit adjustments for potential UBTI, attach your official IRS determination letter, ensure an authorized officer executes the perjury declaration, and deliver Form 8983 to your Partnership Representative well before the 270-day modification window closes.