Returning to Taiwan After TSMC Arizona: What to Do With U.S. Accounts

TSMC-specific foundation

A return to Taiwan does not automatically require closing U.S. accounts

A former TSMC Arizona employee may be able to keep a workplace plan balance, IRA, brokerage or bank account after returning to Taiwan, but each provider can apply its own foreign-address and service policies. Existing holdings may remain while new purchases or account changes are restricted. The answer should come from the provider in writing, not from a general assumption about expatriates.

Inventory the TSMC 401(k), IRAs, brokerage, bank and credit accounts, HSA, insurance and any equity compensation. Record beneficiaries, contact information, tax forms and authentication methods.

Ask each provider whether it services residents of Taiwan, permits a foreign address and restricts purchases or account changes. Obtain written policy where possible.

A former employee may be able to keep a qualifying balance in the plan, roll to another eligible U.S. account or take a distribution. The plan controls availability, and residence can affect administration and withholding.

IRS guidance says distributions to foreign payees generally face 30% withholding unless valid documentation establishes U.S.-person status or another exception. Taiwan is not on the IRS list of U.S. income-tax treaties in force as of this review, so do not assume a reduced treaty rate. Review status and documentation before requesting a payment.

How the pieces interact

Check provider policy and tax status before changing addresses or taking distributions

Retirement-plan distributions to a foreign payee generally face 30% U.S. withholding unless documentation establishes U.S.-person status or another exception. Taiwan is not on the IRS list of income-tax treaties in force, so a Taiwan resident should not assume a reduced treaty pension rate. A rushed cash-out can therefore combine withholding, tax, reinvestment risk and loss of plan features.

A brokerage may allow existing holdings but limit new purchases for a foreign resident. Banking access, phone authentication and card renewals can also become harder after a U.S. address ends.

Review gains, dividends, interest, cost basis and any transfer plan with U.S. and Taiwan tax professionals. Do not sell solely because an account will use a foreign address.

Preserve a U.S. taxpayer-identification record, final pay statements, Forms W-2 and 1099, plan documents and immigration travel history. Update beneficiaries and trusted contacts.

An advisor can organize the account and investment plan, while qualified U.S. and Taiwan professionals determine residency, reporting and tax treatment.

Put the guide to work

Complete the account-access plan before departure

Before the U.S. phone number and address change, preserve authentication, tax records, beneficiary details and a reliable way to receive documents. Decide which accounts remain, which move and which close only after both provider operations and cross-border tax consequences are understood.

Use the sequence below as preparation, not as individualized advice. Current TSMC documents control employer benefits, and qualified tax or legal professionals should confirm decisions in their areas.

• Ask every provider for its Taiwan-resident policy
• Update secure authentication before the move
• Determine future U.S. tax status and withholding forms
• Review gains and distribution consequences before selling
• Preserve W-2, 1099, plan and travel records