Form 8865 Foreign Partnerships

Form 8865 Category 4: Large Foreign Partnership Interests

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Written byLipai WangFounder · IRS-registered tax professional

Key Takeaways

Category 4: triggered by acquisitions, dispositions, or proportional changes around 10% threshold
Acquisition: crossing above 10% ownership
Disposition: dropping below 10% ownership
Proportional changes of 10%+ percentage points also trigger reporting
Changes can occur without buying/selling — e.g., other partners entering or exiting

Form 8865 Category 4: Reportable Events

Category 4 is the strictest filing category — it is triggered by specific reportable events involving changes in your interest in a foreign partnership. These events center around the 10% ownership threshold: crossing it in either direction or experiencing significant changes in your proportional interest.

Three Types of Reportable Events

Acquisitions: you acquire a 10% or more direct interest when you previously held less than 10%. Dispositions: you reduce your direct interest below 10% when you previously held 10% or more. Proportional changes: your direct interest increases or decreases by more than 10 percentage points since your last reportable event, even without buying or selling.

For example, if you own 25% of a foreign partnership and another partner exits, causing your interest to increase to 40%, the 15-percentage-point change is a reportable event even though you did not acquire any additional interest.

Frequently Asked Questions

What if my interest changes by exactly 10%?

The trigger is a change of more than 10 percentage points. A change of exactly 10% does not trigger a reportable event.

How do I track my proportional interest?

Your proportional interest is calculated based on your share of capital, profits, or losses relative to the total partnership. Changes in other partners' interests can affect your proportional share even if your absolute interest stays the same.

form 8865foreign partnershipinternational tax

IRS Form 8865 Instructions

Official IRS source on irs.gov

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