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

Before departure

Give every U.S. account a job before you board

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

Then ask each provider — in writing where possible — whether it services residents of Taiwan, permits a foreign address and restricts purchases or account changes. Existing holdings may be allowed to remain while new activity is restricted, and the provider’s written answer beats any general assumption about expatriates. Your retirement accounts deserve the closest look.

401(k) and IRA

Keep, consolidate or distribute — without defaulting to cash-out

You 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 what is available, and your residence can affect both 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 — and 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. A rushed cash-out can stack that withholding on top of tax, reinvestment risk and the loss of plan features. Review your status and documentation before requesting any payment.

Brokerage and banking

What gets harder once your U.S. address ends

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

Review the gains, dividends, interest, cost basis and any transfer plan with U.S. and Taiwan tax professionals. Do not sell solely because an account will carry a foreign address — and do not leave the paperwork below for after the move.

Departure sequence

The records to lock down while you are still stateside

Preserve your U.S. taxpayer-identification record, final pay statements, Forms W-2 and 1099, plan documents and immigration travel history. Update beneficiaries and trusted contacts while it is still easy.

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

Before you fly

Finish the account-access plan before departure day

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

Take this as preparation, not as individualized advice — current plan documents control your 401(k) options, and cross-border professionals should confirm the withholding before any distribution.

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