Ongoing Reporting Obligations

When this pack is relevant

In practice, reporting obligations often arise across jurisdictions before the full reporting structure has been mapped across systems.

What this pack maps

This pack maps where Taiwan and U.S. tax systems diverge in the treatment of cross-border information reporting obligations — obligations that attach based on ownership status and entity classification rather than transaction activity.

The structural pressure point in this domain is that reporting obligations accumulate silently — each year without the correct form filed keeps the entire tax year open indefinitely. Where structures are identified without the related reporting obligations, exposure accumulates across filing periods.

Reporting exposure is not defined by forms. It reflects how structures are interpreted across systems.

Where structural risk typically appears

• 01 Form 5471 — foreign corporation reporting — Reporting obligations attach based on ownership thresholds rather than transactional activity. A U.S. person who acquires a Taiwan company triggers annual Form 5471 requirements regardless of whether the entity earns income, with a $10,000 base penalty per unfiled return per year
• 02 FBAR — foreign financial account reporting — The obligation attaches based on aggregate account balances at any point during the year, not on income earned. A U.S. person with multiple Taiwan accounts below individual thresholds may still be required to file FinCEN 114 once balances are aggregated
• 03 PFIC — passive foreign investment company exposure — Taiwan mutual funds and investment trusts are frequently classified as PFICs under U.S. tax law regardless of how they are characterized under Taiwan financial regulation. The structural divergence between product classification and PFIC status is among the most common sources of unreported exposure
• 04 Taiwan CFC and Subpart F interaction — Taiwan CFC rules effective 2023 and U.S. Subpart F rules can apply simultaneously to the same entity held by a person with dual Taiwan–U.S. status. Deemed income recognized under one system does not automatically satisfy the other
• 05 FATCA — Form 8938 foreign asset reporting — Form 8938 operates independently of FBAR, applying different thresholds and covering a broader asset class. The two obligations are not substitutes — both may apply to the same assets within the same reporting period

What this pack contains

Structural reference depth for practitioners. Maps structural interaction and points of irreversibility.

How this pack is used in practice

Packs are typically used by practitioners preparing for Taiwan–U.S. cross-border matters or internal case review. Typical professional uses include:

• Preparing for cross-border situations where reporting obligations have not been mapped
• Internal case review discussions between Taiwan-side and U.S.-side practitioner teams
• Identifying where specialist input may be required before structural action is taken
• Aligning tax, legal, and cross-border practitioner teams on the structural interaction between systems
• Understanding Taiwan-side exposure for U.S. practitioners who lack Taiwan tax familiarity
• Understanding U.S.-side exposure for Taiwan practitioners working with U.S.-connected families

This pack sits in the reporting layer of the Taiwan–U.S. cross-border lifecycle — following structural formation and preceding historical remediation.

• Reference document
• Ongoing reporting obligations framework
• Taiwan and U.S. compliance interaction
• Illustrative scenarios
• Appendix A — Quick Reference
• Appendix B — Glossary
• April 2026

Other packs in the series