Mobility & Jurisdictional Exit

How changes in tax residency across Taiwan and the U.S. are characterized across systems during mobility and exit

Most relevant at the mobility stage, where relocation or changing jurisdictional status creates timing-sensitive exposure.

Tier reflects structural intensity, not importance — all packs address consequential decision points.

April 2026

Structural reference for practitioners working across Taiwan–U.S. cross-border systems.

Situation fit

When this pack is relevant

In practice, cross-border mobility often occurs before a stable residency position is established across systems.

Relevant when

Taiwan national departing Taiwan to establish U.S. residency
U.S. citizen or green card holder ending U.S. tax residency
Departure-year filing positions or dual-status year questions
Continued ownership of Taiwan or foreign entities across residency transition
Exit tax screening for long-term U.S. residents or citizens
Cross-border relocation with unrealized Taiwan asset appreciation

May not be necessary when

No change in residency status occurring
Entry into cross-border status (see Pack 01)
Expatriation already completed and exit tax filed
Purely ongoing annual compliance (see Pack 05)

Structural focus

What this pack maps

This pack maps the structural layer where residency transitions between Taiwan and the United States create departure-year filing positions, overlapping obligations on assets held across both jurisdictions, and exit tax exposure that neither jurisdiction's advisors typically address in full.

A person moving between Taiwan and the United States does not exit one tax system and enter another in a single moment. The transition period creates a structural window where obligations under both systems overlap — and where actions taken before, during, and after departure determine the structural outcome.

Mobility risk does not arise from movement alone. It depends on when and how transitions occur.

Primary exposure areas

Where structural risk typically appears

01 Residency termination date and departure-year structure — The date on which U.S. or Taiwan tax residency terminates is a structural determination — not merely a travel fact — that governs the income characterization, deduction availability, and filing obligations for the entire departure year
02 Dual-status year filing structure — The departure year may result in both resident and non-resident periods within the same tax year, each with different income characterization rules, different deduction limitations, and different filing requirements
03 Exit tax under IRC §877A — U.S. citizens and long-term residents who expatriate are subject to a mark-to-market exit tax on all property — with covered expatriate thresholds based on net worth, average tax liability, and 5-year compliance certification
04 Retained Taiwan entity at departure — A U.S. person who departs while retaining ownership of a Taiwan company continues to have Form 5471, Subpart F, and CFC obligations as a non-resident — a structural position that is often not identified at departure
05 FBAR obligations across the transition — FBAR obligations attach based on U.S. person status during any portion of the calendar year — the departure year creates FBAR obligations for accounts held during the resident period even if non-resident status is established before December 31

Contents

What this pack contains

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

Structural overview of the Taiwan–U.S. mobility and residency transition domain

Taiwan and U.S. framework comparison — separate jurisdiction analysis

Cross-system divergence points and structural interaction map

Irreversibility triggers — decisions that are difficult to reverse

Illustrative scenarios drawn from recurring practice patterns

Common professional misinterpretations observed in cross-border practice

Filing orientation for both Taiwan and U.S. jurisdictions

Advisor coordination framework — structural questions for pre-action review

Professional use

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 uses include:

Preparing for cross-border situations where residency transition or departure-year exposure has not been mapped
Internal case review between Taiwan-side and U.S.-side practitioners
Identifying where specialist input may be required before structural action is taken
Aligning tax, legal, and filing teams on the structural interaction between systems
Mapping Taiwan-side exposure for practitioners whose primary practice is in the United States
Mapping U.S.-side exposure for practitioners whose primary practice is in Taiwan

Professional boundary

Structural reference — not advice

Decision Packs are structural reference publications. They do not provide tax, legal, or financial advice and do not create an advisory or client relationship of any kind.

The material maps structural interaction points between Taiwan and U.S. tax systems. Applying these structural reference materials to a specific client requires independent professional judgment based on specific facts in both jurisdictions.

Readers remain solely responsible for their own professional judgment and any advice provided to their clients.

Reference contents