Before you leave Taiwan, record your travel dates and list every financial account you hold. After you land in Phoenix, set up payroll, benefits, banking and tax withholding — then review the cross-border tax filings for your move year with qualified U.S. and Taiwan professionals.
Before departure
Build the two-country inventory before you change anything
List your Taiwan bank, brokerage, pension, insurance, property and business interests together with any U.S. accounts you already hold — with ownership, currency, cost information and the income each produces. Do not close or transfer accounts simply to make the list shorter.
Record your expected travel, immigration and work dates too. Arrival dates, immigration status and days in the United States can affect federal tax residency, Arizona applies its own residency rules, and once you are a U.S. person your Taiwan accounts can raise U.S. income-tax and reporting questions.
So keep the assignment letter, the travel calendar and the worldwide account list together, and start qualified cross-border advice before any large transfer or sale. With the inventory set, the first month in Phoenix has its own to-do list.
- Passport, immigration and work-authorization dates
- Taiwan and U.S. financial accounts
- Property and lease obligations
- Relocation benefits and repayment clauses
- Expected payroll start and first bonus
- Family health and insurance needs
First 30 days
Set up the U.S. machinery everything else runs on
Secure a U.S. mailing address, taxpayer documentation, bank access and a reliable cash reserve. Credit history may take time to establish, and that affects housing, vehicles and deposits.
Expect a messy first paycheck: relocation amounts, new benefit deductions and withholding elections can all land while you are paying deposits, transportation and temporary housing — and your Taiwan interests keep running in the background. A cash forecast in both currencies helps, as does dividing the work clearly among your advisor, a U.S. tax professional and a Taiwan tax or legal professional, so no one provider is asked to answer every cross-border question.
Complete your federal and Arizona withholding elections using realistic household income. Arizona says new employees subject to state withholding should complete Form A-4 within five days — then you can turn to the benefits enrollment itself.
TSMC Arizona benefits
Enroll from the Arizona documents, not Taiwan assumptions
Benefit design differs by region. Review the Arizona enrollment guide for medical coverage, the 401(k), employer contributions, insurance and any stock or bonus program available to you.
Choose beneficiaries that work with your cross-border estate picture. A U.S. beneficiary form and a Taiwan will or family arrangement should be read together, not in isolation.
The first tax year
Expect two filing systems in the move year
Your move year can involve Taiwan income, U.S. wages, foreign accounts, currency movements and part-year Arizona residency. Decide early who will prepare each return and how information will be shared.
An advisor familiar with TSMC Arizona can organize the cash flow, benefits and investments while cross-border tax and legal professionals handle the jurisdiction-specific advice.
Your landing plan
What the first 90 days should leave you with
By day 90 you want stable account access, documented residency facts, adequate U.S. cash, correct payroll elections and a complete list of accounts in both countries. Do not close Taiwan accounts merely to simplify the list, and do not assume a TSMC benefit you used in Taiwan applies to the Arizona employee group.
Read this checklist as preparation, not as individualized advice — current TSMC Arizona documents control your U.S. benefits, and qualified professionals in both countries should confirm the tax treatment of your move.
- Record every U.S. arrival, departure and work date
- Keep the assignment and relocation agreements
- List Taiwan and U.S. accounts with their legal ownership
- Establish U.S. banking, credit and an emergency reserve
- Review your TSMC Arizona elections and both tax systems with qualified professionals
- Before departureBuild the two-country inventory
List every Taiwan and U.S. account and record your travel, immigration and work dates — before changing anything.
- First 30 daysSet up the U.S. machinery
Mailing address, taxpayer documentation, bank access and a cash reserve. Arizona says new employees subject to state withholding should complete Form A-4 within five days.
- First paycheckExpect a messy one
Relocation amounts, new benefit deductions and withholding elections can all land at once.
- By day 90Land with the essentials in place
Stable account access, documented residency facts, adequate U.S. cash, correct payroll elections and a complete two-country account list.
Frequently asked questions
Questions employees ask next
When should I begin financial planning for a TSMC transfer to Arizona?
Before you sell assets, close accounts or receive major relocation payments — residency and reporting may affect all three.
Should I close Taiwan accounts when moving to Phoenix?
Not automatically. Review access, reporting, tax, currency and your long-term plans before making changes.
Do Taiwan and Arizona TSMC employees receive identical benefits?
Do not assume so. Use the current Arizona enrollment and participant documents for your U.S. benefits.
Primary sources
What this guide is based on
You understand the issue
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Semiconductor Wealth connects employees with financial advisors who can help coordinate employer benefits, taxes, cash flow and investments into a clear sequence of decisions.