Header
The name of the partnership and its employer identification number (EIN).
1065 Sch. B-1
Information on Partners Owning 50% or More of the Partnership
- Agency
- IRS
- Revision
- Rev. August 2019
- Fillable fields
- 65
- Pages
- 2
- Official source
- IRS form page
- Checked
- October 21, 2026
Schedule B-1 (Form 1065): Information on Partners Owning 50% or More of the Partnership
Schedule B-1 (Form 1065), Information on Partners Owning 50% or More of the Partnership, is a one-page schedule a partnership attaches to Form 1065, U.S. Return of Partnership Income. The IRS About page says partnerships use it to provide information applicable to certain entities, individuals, and estates that own, directly or indirectly, an interest of 50% or more in the profit, loss, or capital of the partnership.
The instructions on page 2 say it is filed by all partnerships that answer Yes to question 2a or question 2b on Form 1065, Schedule B (question 3a or 3b for 2009 through 2017). Part I lists entity owners and Part II lists individuals and estates, each with the maximum percentage they own.
The current revision is August 2019. You can fill out Schedule B-1 free in your browser on this page and download it without an account.
What's on Schedule B-1 (Form 1065)
Part I: entities owning 50% or more
Columns (i) to (v): name of entity, EIN (if any), type of entity, country of organization, and maximum percentage owned in profit, loss, or capital.
Part II: individuals or estates owning 50% or more
Columns (i) to (iv): name of individual or estate, identifying number (if any), country of citizenship, and maximum percentage owned in profit, loss, or capital.
Page 2: instructions
Purpose of the form, who must file, and specific instructions for Parts I and II.
Page 2: two worked examples
Example 1 shows indirect ownership through another partnership. Example 2 shows when family attribution does not apply.
How to fill out Schedule B-1 (Form 1065)
- 1
Start from Schedule B
Complete Part I if the partnership answered Yes to question 2a and Part II if it answered Yes to question 2b. Ownership is measured at the end of the tax year.
- 2
Part I entries
Enter each entity's name, EIN, type (corporation, partnership, trust, tax-exempt organization or foreign government), country of organization and maximum percentage owned. For a tax-exempt organization, enter tax-exempt organization in column (iii).
- 3
Part I special cases
List the parent corporation rather than subsidiary members of a consolidated group, and the entity owner rather than a disregarded entity. If the disregarded entity's owner is an individual, list that person in Part II.
- 4
Part II entries
Enter each individual's or estate's name, social security or employer identification number, country of citizenship and maximum percentage owned. For an estate, the country of citizenship is that of the decedent.
- 5
Count indirect ownership
In Example 1, Corporation A owns 15% of Partnership C directly and 35% indirectly through Partnership B, so C lists Corporation A at 50% and Partnership B at 70%.
- 6
Family attribution
In Example 2, A owns 50% of Partnership X and A's daughter B owns no interest. The partnership lists A at 50% in Part II and does not list B.
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Where it goes and what to know
Attach to Form 1065
The schedule says to attach it to Form 1065, the partnership's return.
Who must file
The instructions say all partnerships that answer Yes to question 2a or 2b on Form 1065, Schedule B, file it.
Older returns
For 2009 through 2017 returns, the matching Schedule B questions are 3a and 3b instead of 2a and 2b.
More information
The form points to www.irs.gov/Form1065 for the latest information, and to the Instructions for Form 1065 for the Paperwork Reduction Act Notice.
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Who fills out Schedule B-1 (Form 1065)?
The partnership completes Schedule B-1 and attaches it to its Form 1065, which goes to the IRS. The partnership identifies the owners in Parts I and II.
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Questions about Form 1065 Sch. B-1
Who files Schedule B-1 (Form 1065)?
The instructions say it is filed by all partnerships that answer Yes to question 2a or question 2b on Form 1065, Schedule B, and attached to Form 1065.
Does a partner who owns 50% file Schedule B-1?
The instructions say partnerships file it with Form 1065. A partner owning 50% or more is listed on it by the partnership.
Does indirect ownership count toward 50%?
Yes. The schedule asks about interests owned directly or indirectly. In Example 1, a 15% direct interest plus 35% held through another partnership adds up to 50%.
What goes in the maximum percentage column?
The maximum percentage the owner holds, directly or indirectly, in the profit, loss, or capital of the partnership.
What country of citizenship is entered for an estate?
The instructions say to enter the citizenship of the decedent.
How is a disregarded entity reported?
The partnership lists the entity owner of the disregarded entity rather than the disregarded entity itself. If that owner is an individual, the individual goes in Part II.