Last Updated: January 16, 2026 | International tax CPA firm with Big Four experience
Key Takeaways
- Section 721(c) applies to partnerships formed on or after January 18, 2017
- Triggered when a U.S. person contributes built-in gain property to a partnership with related foreign partners
- Default rule: Immediate gain recognition on contribution
- Gain Deferral Method: Allows deferral if specific requirements are met
- Schedule G reports Section 721(c) property and gain deferral method application
- Schedule H reports acceleration events that trigger gain recognition
- Remedial allocation method required for 721(c) property using gain deferral
Table of Contents
What Is a Section 721(c) Partnership?
Section 721(c) partnerships involve specific rules that can override the general tax-free treatment of property contributions to partnerships. Understanding when these rules apply is essential to avoid unexpected gain recognition.
Direct Answer: A Section 721(c) partnership is a partnership formed on or after January 18, 2017, where a U.S. person contributes property with built-in gain (fair market value exceeds basis), and a related foreign person is also a partner. Under the default rule, the U.S. person must recognize the built-in gain immediately. The gain deferral method provides an alternative that postpones recognition if specific requirements are met.
When Section 721(c) Applies
Three Conditions
Section 721(c) applies when all three conditions are met:
- Partnership formed on or after January 18, 2017
- U.S. person contributes property with built-in gain
- Fair market value exceeds adjusted basis
- Even $1 of built-in gain can trigger the rules
- Related foreign person is a partner
- Directly or indirectly
- “Related” under Section 267(b) or 707(b)(1)
Why These Rules Exist
Before Section 721(c), a U.S. person could contribute appreciated property to a foreign partnership, and the built-in gain could effectively be shifted to foreign partners through partnership allocations. Section 721(c) closes this planning opportunity.
Default Rule vs. Gain Deferral Method
Default Rule: Immediate Recognition
Without the gain deferral method election, the U.S. transferor must recognize the built-in gain immediately upon contribution. The contribution is treated as if the property were sold at fair market value.
Example:
- Property FMV: $1,000,000
- Adjusted basis: $400,000
- Built-in gain: $600,000
- Result under default rule: Recognize $600,000 gain immediately
Gain Deferral Method: Postponing Recognition
The gain deferral method allows the U.S. transferor to defer the built-in gain if the partnership meets ongoing compliance requirements. The gain isn’t forgiven. It’s tracked and recognized over time through partnership allocations.
Same example with gain deferral method:
- Built-in gain: $600,000
- Result: No immediate recognition
- Ongoing: Built-in gain tracked and allocated to U.S. transferor as partnership earns income or sells property
Gain Deferral Method Requirements
The gain deferral method isn’t automatic. The partnership must satisfy specific requirements annually.
Requirement 1: Remedial Allocation Method
The partnership must adopt the remedial allocation method (under Section 704(c)) for all Section 721(c) property. This ensures the built-in gain is allocated to the contributing partner rather than shifted to other partners.
The remedial method creates notional tax items that:
- Allocate built-in gain to the contributing U.S. person
- Allocate offsetting deductions to other partners
- Prevent any built-in gain from shifting to foreign partners
Requirement 2: Consistent Reporting
All related U.S. transferors must apply the gain deferral method consistently. The partnership agreement must include provisions supporting the method’s requirements.
Requirement 3: Annual Reporting
The U.S. transferor must file Form 8865 with Schedule G every year the gain deferral method applies. This continues until:
- All built-in gain is recognized
- The partnership disposes of the property
- An acceleration event occurs
- The partnership terminates
Schedule G: Section 721(c) Partnership Information
Schedule G reports the application of the gain deferral method. It’s required for the year of contribution and each subsequent year until the method no longer applies.
Schedule G Structure
Part I: Section 721(c) Property
Report each item of Section 721(c) property:
- Property description
- Whether it’s Section 197(f)(9) property (certain intangibles)
- Whether it’s ECI property
- Fair market value at contribution
- Adjusted basis at contribution
Part II: Remaining Built-in Gain, Remedial Income, and Gain Recognition
Track the built-in gain annually:
- Beginning remaining built-in gain
- Remedial income allocated to U.S. transferor
- Gain recognized during the year
- Ending remaining built-in gain
Part III: Allocation Percentages
Report allocation percentages for:
- U.S. transferor
- Related foreign persons
- Other partners
Part IV: Allocation of Items to U.S. Transferor
Detail the specific allocations made to the U.S. transferor for the tax year, coordinating with Schedule K-1.
Parts V and VI: Supplemental Information
Report additional information required by the regulations, including any exceptions or special circumstances.
Filing Timing
- Year of contribution: File Schedule G with Form 8865
- Annual basis: File for each year gain deferral method applies
- Final year: File when property is fully depreciated, sold, or acceleration event occurs
Schedule H: Acceleration Events
Schedule H reports events that trigger gain recognition under the gain deferral method.
What Is an Acceleration Event?
An acceleration event is any event that would:
- Reduce the remaining built-in gain under the gain deferral method, OR
- Defer recognition of remaining built-in gain beyond what the method intended
When an acceleration event occurs, the U.S. transferor may need to recognize the remaining built-in gain immediately.
Types of Acceleration Events
Termination Events (Reg. 1.721(c)-5(b))
- Partnership terminates
- U.S. transferor’s interest terminates
- Section 721(c) property ceases to exist
Partial Acceleration Events (Reg. 1.721(c)-5(d))
- Partial dispositions of 721(c) property
- Events affecting a portion of the built-in gain
Successor Events (Reg. 1.721(c)-5(c))
- Transfer of 721(c) property to another partnership
- Certain restructurings
Partnership Interest Dispositions (Reg. 1.721(c)-5(f))
- Taxable disposition of portion of partnership interest
- May trigger partial gain recognition
Section 367 Transfers (Reg. 1.721(c)-5(e))
- Direct or indirect transfer of 721(c) property to a foreign corporation under Section 367
Elective Acceleration
The U.S. transferor may affirmatively choose to treat any event as an acceleration event. This might be advantageous when:
- Current tax rates are favorable
- Losses are available to offset gain
- Administrative burden of continued tracking is high
Consequences of Acceleration
When an acceleration event occurs, the U.S. transferor recognizes gain equal to the remaining built-in gain (or a portion for partial events). This gain is treated as occurring immediately before the event.
Connection to Schedule O
Schedule O and Schedule G both apply to property contributions, but they serve different purposes.
Schedule O: Documenting the Contribution
Schedule O reports the basic facts of the property contribution:
- What property was transferred
- When it was transferred
- Fair market value and basis
- Section 704(c) allocation method
Schedule O is required for all Category 3 filers meeting the thresholds.
Schedule G: Documenting Gain Deferral Method
Schedule G reports the application and ongoing tracking of the gain deferral method:
- Detailed 721(c) property information
- Annual built-in gain tracking
- Allocation percentages
- Compliance with method requirements
Schedule G is required specifically for Section 721(c) property using the gain deferral method.
When You Need Both
If you contribute appreciated property to a Section 721(c) partnership:
- Schedule O: Required (documents the contribution)
- Schedule G: Required if using gain deferral method
Related: Form 8865 Schedule O Property Transfer Guide
Practical Considerations
When Gain Deferral Method Makes Sense
Consider the gain deferral method when:
- You plan long-term partnership investment
- Property has substantial built-in gain
- You can maintain ongoing compliance
- Immediate recognition would create significant tax burden
When Default Recognition May Be Better
Consider recognizing gain immediately when:
- Built-in gain is relatively small
- Current tax rates are low
- Losses available to offset
- Administrative burden of tracking is disproportionate
- Near-term exit from partnership planned
Compliance Burden
The gain deferral method requires:
- Annual Schedule G filing
- Ongoing built-in gain tracking
- Coordination with partnership accounting
- Monitoring for acceleration events
For partnerships with multiple 721(c) properties or complex structures, this can be substantial.
Frequently Asked Questions
What is a Section 721(c) partnership?
A Section 721(c) partnership is one where a U.S. person contributes built-in gain property (FMV exceeds basis) to a partnership formed on or after January 18, 2017, and a related foreign person is a partner. This triggers special rules potentially requiring immediate gain recognition.
What triggers Section 721(c)?
Three conditions together: (1) partnership formed on or after January 18, 2017, (2) U.S. person contributes property with built-in gain, and (3) a related foreign person is a partner.
Can I avoid immediate gain recognition?
Yes, through the gain deferral method. This requires the partnership to use the remedial allocation method for 721(c) property and annual Schedule G reporting. The gain is tracked and allocated over time rather than recognized immediately.
What is the remedial allocation method?
The remedial allocation method is a Section 704(c) method that creates notional tax items to ensure built-in gain is fully allocated to the contributing partner. It prevents any shifting of built-in gain to other partners, including foreign partners.
How long do I need to file Schedule G?
File Schedule G annually until the gain deferral method no longer applies. This continues until all built-in gain is recognized (through allocations, property sale, or acceleration event).
What happens if I miss a Schedule G filing?
Failing to file Schedule G can be treated as failing to comply with the gain deferral method requirements. This could trigger recognition of remaining built-in gain. Penalty relief may be available for reasonable cause.
What is an acceleration event?
An acceleration event is any event that would reduce remaining built-in gain or defer its recognition beyond what the gain deferral method intended. Examples include partnership termination, property disposition, and transfers to foreign corporations.
Do these rules apply to domestic partnerships?
Section 721(c) can apply to domestic partnerships if they have related foreign partners. The “foreign partnership” label isn’t required. The rules focus on preventing gain shifting to related foreign persons.
Next Steps
Section 721(c) involves complex ongoing compliance. Before contributing appreciated property to any partnership with related foreign partners, analyze whether the gain deferral method is feasible and advisable for your situation.
Need Help With Section 721(c)?
Section 721(c) involves complex ongoing compliance requirements. Evaluate your options with a CPA experienced in international partnership taxation before contributing appreciated property.
Related Form 8865 Resources
- Complete Form 8865 Guide for Foreign Partnerships
- Form 8865 Categories of Filers Guide
- Form 8865 Penalties and Relief Options
- Schedule O: Property Transfer Reporting
- Constructive Ownership Rules Explained
- Form 8865 vs Form 1065: Key Differences
- Schedule K-2 and K-3 Requirements
Sources
- IRS Form 8865 Instructions (2025)
- 26 CFR § 1.721(c)-1 through 1.721(c)-7 – Contributions of property to partnerships with related foreign partners
- Treasury Final Regulations T.D. 9814 (January 2017)
- IRS About Form 8865
Disclaimer: This article is for general informational purposes only and does not constitute tax, legal, or financial advice. Each taxpayer’s situation is unique and requires individual analysis. Consult with a qualified CPA for advice specific to your circumstances.
