Printable Form 2026

IRS Form 1065 (Schedule B-1)

IRS Form 1065 (Schedule B-1) – In the complex world of partnership taxation, ensuring compliance with IRS requirements is essential for avoiding penalties and audits. One key component is IRS Form 1065 Schedule B-1, which focuses on disclosing information about partners who own 50% or more of the partnership. This article provides a comprehensive overview, including who must file, how to complete it, and important rules, drawing from official IRS guidelines to help partnership owners navigate this form effectively.

What Is IRS Form 1065?

IRS Form 1065, known as the U.S. Return of Partnership Income, is the primary tax return filed by partnerships to report their income, gains, losses, deductions, and credits to the IRS. Unlike corporations, partnerships are pass-through entities, meaning they don’t pay income tax themselves—their profits and losses flow through to the partners’ individual tax returns via Schedule K-1. This form must be filed annually by most domestic partnerships, including limited liability companies (LLCs) taxed as partnerships, with deadlines typically falling on March 15 for calendar-year partnerships (or the 15th day of the third month after the tax year ends).

Form 1065 includes several schedules, each serving a specific purpose. Schedule B, for instance, contains a series of yes/no questions about the partnership’s structure, ownership, and operations. If certain questions in Schedule B are answered “Yes,” additional schedules like B-1 may be required.

Understanding Schedule B-1: Purpose and Overview

Schedule B-1 (Form 1065), titled “Information on Partners Owning 50% or More of the Partnership,” is an attachment to Form 1065 used to disclose details about any entities, individuals, or estates that own—directly or indirectly—50% or more of the partnership’s profit, loss, or capital. This schedule promotes transparency in ownership structures and helps the IRS identify potential related-party transactions or control issues under rules like section 267(c) of the Internal Revenue Code.

The form is divided into two main parts:

  • Part I: Focuses on corporations, partnerships, trusts, tax-exempt organizations, or foreign governments owning 50% or more.
  • Part II: Addresses individuals or estates with similar ownership levels.

This disclosure is crucial for partnerships with concentrated ownership, as it ensures accurate reporting and compliance with constructive ownership rules.

Who Needs to File Schedule B-1?

Not all partnerships must file Schedule B-1. It is required only if the partnership answers “Yes” to specific questions on Schedule B of Form 1065:

  • Question 2a (or 3a for tax years 2009–2017): Did any foreign or domestic corporation, partnership (including entities treated as partnerships), trust, tax-exempt organization, or foreign government own, directly or indirectly, an interest of 50% or more in the profit, loss, or capital of the partnership?
  • Question 2b (or 3b for tax years 2009–2017): Did any individual or estate own, directly or indirectly, an interest of 50% or more in the profit, loss, or capital of the partnership?

If either question is “Yes,” attach Schedule B-1 to Form 1065. Failure to file when required can lead to penalties or increased IRS scrutiny. Partnerships should review their ownership percentages at the end of the tax year to determine the maximum interest held in profit, loss, or capital.

How to Fill Out Schedule B-1: Step-by-Step Guide?

Completing Schedule B-1 involves listing ownership details accurately, applying constructive ownership rules where applicable. Always use the highest percentage owned in profit, loss, or capital for the year. Attach additional sheets if more space is needed, formatted similarly to the form.

Part I: Entities Owning 50% or More

Complete this part if “Yes” to Question 2a. For each qualifying entity:

  • Name and EIN: Enter the entity’s name and Employer Identification Number (EIN).
  • Type of Entity: Specify if it’s a corporation, partnership, trust, tax-exempt organization, or foreign government.
  • Country of Organization: If foreign, note the country.
  • Maximum Percentage Interests: Report the highest percentage owned (directly or indirectly) in profit, loss, or capital at year-end.

For disregarded entities (like single-member LLCs), list the owner instead of the entity itself.

Part II: Individuals or Estates Owning 50% or More

Complete this if “Yes” to Question 2b. For each individual or estate:

  • Name and SSN/EIN: Provide the name and Social Security Number (SSN) or EIN.
  • Country of Citizenship: For individuals, enter the country; for estates, use the decedent’s citizenship.
  • Maximum Percentage Interests: As in Part I, report the highest percentage in profit, loss, or capital.

Constructive Ownership Rules

Ownership isn’t always direct—use section 267(c) rules (excluding 267(c)(3)) to calculate indirect interests:

  • Entity Attribution: Ownership in an entity is proportionately attributed to its owners.
  • Family Attribution: Interests owned by family members (spouse, children, grandchildren, parents, grandparents, siblings) may be attributed, but only if the attributed party already has a direct or indirect interest.

For example, if Corporation A owns 40% of the partnership and Partnership B owns 30% (with Corporation A owning 100% of Partnership B), Corporation A has 70% indirect ownership through B and must be reported.

Common Examples of Schedule B-1 Reporting

To illustrate:

  • Corporate Ownership: A corporation owns 60% directly—list it in Part I with 60%.
  • Individual Through Entity: An individual owns 100% of a corporation that owns 55% of the partnership—report the individual in Part II with 55% indirect ownership.
  • Family Scenario: A parent owns 40%, and their child owns 20%—if attribution applies, the parent may be deemed to own 60%.

Always calculate based on year-end percentages and consult IRS Publication 541 for more on partnerships.

Where to Download IRS Form 1065 Schedule B-1?

The official PDF for Schedule B-1 is available directly from the IRS website: https://www.irs.gov/pub/irs-pdf/f1065sb1.pdf. For the latest instructions, refer to the Instructions for Form 1065, which cover Schedule B-1 in detail. As of 2025, the form remains revised from August 2019, but always check for updates on IRS.gov.

Tips for Compliance and Avoiding Errors

  • Double-Check Ownership: Use partnership agreements and capital account statements to verify percentages.
  • Electronic Filing: Many tax software programs, like TaxSlayer, integrate Schedule B-1 automatically if triggered by Schedule B answers.
  • Penalties: Incomplete or inaccurate reporting can result in fines under IRC section 6698.
  • Professional Help: Partnerships with complex ownership should consult a tax advisor to ensure proper application of constructive rules.

By properly filing IRS Form 1065 Schedule B-1, partnerships maintain transparency and compliance, reducing the risk of IRS inquiries. This guide is for informational purposes—always refer to official IRS resources or a tax professional for personalized advice.