Concept
U.S. international tax reporting is not limited to foreign corporations. A U.S. person may need separate forms for a foreign partnership, a foreign disregarded entity, a foreign branch or a transfer of property to a foreign corporation. The compliance risk is that local legal labels do not match U.S. tax classifications, so a structure that looks ordinary abroad can carry three different U.S. returns.
These forms sit alongside the CFC analysis in U.S. CFC rules and the wider asset-reporting layer: Form 5471 for controlled foreign corporations, Form 8938 and the FBAR for foreign accounts and financial assets, and Form 8621 for PFIC holdings. Once the corporate side is mapped, partnerships, branches and transfers fill in the rest of the entity perimeter. This is general legal information, not individual tax advice, and it does not replace work with a U.S. international tax CPA or tax attorney.
Classification first
Before choosing a form, classify each entity for U.S. tax purposes. Some foreign companies are corporations by default, while other eligible entities may be treated as corporations, partnerships or disregarded entities. The IRS page for Form 8832 is the starting point for entity classification elections.
The working file should include the legal form, country, owners, percentage interests, U.S. classification, election history, accounting period, functional currency, bank accounts and whether the entity owns other entities.
The three forms
Each form maps to a different fact pattern. Read them together, because one structure can trigger more than one.
Form 8865 — foreign partnership
Form 8865 is used by certain U.S. persons with interests in foreign partnerships. It can apply to controlled foreign partnerships, transfers to foreign partnerships, acquisitions, dispositions and changes in interests. A family investment partnership, a founder holding partnership or a fund vehicle can create Form 8865 work even when no U.S. partnership exists. Do not assume a partnership is low risk because it is transparent locally — U.S. reporting may require capital accounts, partner allocations and schedules that the foreign accounts never produced.
Form 8858 — disregarded entity or branch
Form 8858 is used for certain foreign disregarded entities and foreign branches. It often appears after a check-the-box election, a single-member foreign company, a branch of a U.S. business, or an entity owned through a tiered group. The key task is to reconcile local financial statements to U.S. tax categories. The branch or disregarded entity may not have a separate local tax return, but the U.S. owner still needs books that support the U.S. filing.
Form 926 — transfer to a foreign corporation
Form 926 can apply when a U.S. transferor moves property into a foreign corporation. It is relevant in cross-border formations, IP migrations, share-for-share reorganizations, capitalization of a foreign company and founder restructurings. The transfer analysis should be prepared before signing — once shares, cash, IP, receivables or business assets move into a foreign corporation, the reporting and tax consequences may already be fixed.
Filing tests and thresholds
Form 8865 runs on four filer categories. Category 1 is a U.S. person who controlled the partnership, meaning more than a 50% interest, at any time in its tax year. Category 2 is a U.S. person holding at least 10% while U.S. persons each holding 10% or more controlled the partnership, and it falls away once a Category 1 filer exists. Category 3 covers a U.S. person who contributed property for a partnership interest and either held at least 10% afterward or contributed more than $100,000. Category 4 is the reportable event: an acquisition, a disposition, or a change in proportional interest.
Form 8858 follows a foreign disregarded entity or a foreign branch held directly, or through a controlled foreign corporation or partnership. It usually surfaces after a check-the-box election turns a foreign company into a disregarded entity, or where a single-member foreign LLC sits in the structure. The work itself is reconciling local accounts to U.S. tax categories, even when the entity files nothing separately abroad.
Form 926 is triggered when a U.S. transferor moves property to a foreign corporation and, immediately after, holds at least 10% of its vote or value, or when that person and related parties moved more than $100,000 in cash during the 12 months ending on the transfer date. The $100,000 figure is statutory and does not index to inflation, so an ordinary funding round can cross it long before anyone thinks of it as a transfer.
What a missed form costs
For the section 6038 forms, 8865 and 8858, a failure opens at $10,000 per form for each year. After the IRS sends notice, another $10,000 accrues for every 30-day period, up to an additional $50,000, and the foreign tax credit can be cut by 10%. The Form 8865 contribution category carries its own charge under section 6038B: 10% of the value of the contributed property, generally capped at $100,000 unless the omission was intentional, on top of any gain recognized on the contribution.
Form 926 also sits under section 6038B. The penalty is 10% of the fair market value of the transferred property, capped at $100,000 unless the failure was due to intentional disregard, with a reasonable-cause exception. A transfer can recognize gain under section 367 at the same time, so the reporting failure and the substantive tax tend to arrive together.
Assessment authority is unsettled
Whether the IRS can assess these penalties itself, instead of suing to collect them, is openly contested. In Farhy the Tax Court held that section 6038(b) grants no assessment power, a position it has repeated into 2025. The D.C. Circuit reversed that reading in May 2024 and upheld administrative assessment, and appeals for U.S. persons living abroad run to the D.C. Circuit, so for many cross-border filers the Service's assessment power currently stands. The Mukhi line now heads toward the Eighth Circuit and may push the question to the Supreme Court.
The practical reading is narrow. The dispute is about collection procedure, not about whether the obligation exists, and it leaves the section 6038B penalty on Form 926 untouched. Treating a late form as a litigation position rather than a problem to cure is the wrong bet. The durable protection is an accurate, timely filing, and a documented cleanup where the history is missing.
Checklist
- Build a full entity list before filing season.
- Classify each entity for U.S. tax purposes and document any Form 8832 elections.
- Match each entity to Form 5471, 8865, 8858, 926, 8938 and FBAR where relevant.
- Confirm who owns, controls or transfers property, not only who signs the local accounts.
- Translate accounts into U.S. dollars and retain the exchange-rate method.
- Keep formation documents, registers, transfer agreements, bank statements and tax returns in one file.
- Review the reporting map after capital contributions, liquidations, redomiciliations and trust transfers.
Common mistakes
- Treating a foreign partnership as a local-law issue only.
- Making a check-the-box election without tracking the new Form 8858 obligation.
- Transferring IP or shares to a foreign company without Form 926 review.
- Forgetting indirect ownership through a holding company or trust.
- Filing the income tax return while leaving international information returns for later.
- Using local accounts that cannot support U.S. categories or owner allocations.
Advisor trigger
Bring in a U.S. international tax advisor before any new foreign entity, election, contribution, merger, liquidation, fund subscription, family partnership or IP transfer. If older forms are missing, use enforcement and cleanup before filing isolated late forms.
Q&A
Which form applies to a foreign partnership interest
Form 8865, for certain U.S. persons with interests in foreign partnerships. It can reach controlled foreign partnerships, transfers, acquisitions, dispositions and changes in interests, and may require capital accounts and partner allocations that the foreign accounts do not contain.
What is Form 8858 for
Foreign disregarded entities and foreign branches. It commonly follows a check-the-box election or a single-member foreign company. The main work is reconciling local statements to U.S. tax categories, even when the entity files no separate local return.
When does Form 926 come up
When a U.S. transferor moves property — shares, cash, IP, receivables or business assets — into a foreign corporation. It appears in cross-border formations, IP migrations and reorganizations, and the analysis should be done before signing because the consequences can fix at the moment of transfer.
Why does classification have to come first
Because the U.S. form follows the U.S. tax character of the entity, not its foreign legal label. The same local company can be a corporation, a partnership or a disregarded entity for U.S. tax, and that answer decides whether Form 5471, Form 8865 or Form 8858 applies.