What to Do With Your US Bank Accounts, 401(k), and Mail When You Move Abroad

The boring logistics are what end moves. Not visas, not housing — the accounts, taxes, and mail that keep running in the US while your life happens somewhere else.

Most people ignore these until month three, when a payment bounces, a letter goes missing, or a tax deadline passes without notice. A few hours of planning before you leave saves months of phone calls from abroad.

This post is planning guidance, not legal, tax, or financial advice — every item below is a thing to research, and the tax and retirement items are things to research with licensed professionals who work with expats.

Bank accounts: keep both, for different jobs

Most expats keep a US bank account and a local one. They do different jobs:

• US account: loan payments, direct deposits, US credit cards, tax payments, and anything denominated in dollars.
• Local account: everyday spending in local currency, local rent, local bills.

A few rules that save real money:

• Check foreign transaction fees before you leave — on debit and credit cards. Three percent on everything you spend abroad is a tax on your entire move.
• Call your bank and flag your travel. Cards get frozen for “unusual activity” all the time. A five-minute call prevents a two-week freeze.
• Don’t close everything. Closing your US accounts complicates loan payments, US income, and any future return. Keep at least one solid US account open — just make sure it doesn’t charge you for a foreign address. Some banks are expat-hostile and close accounts without warning; call ahead and ask their policy.
• Decide how money moves between accounts before you need it. Currency conversion and transfer fees cost you twice — once in fees, once in the exchange-rate spread.

Your visa category affects some of this — residency processes often want proof of local banking or insurance, so the local account isn’t optional in some countries. Our visa categories guide shows which requirements apply where.

Credit cards: one no-fee card, plus a backup

• Carry at least one card with no foreign transaction fees. If your current cards all charge 3%, get one before you leave.
• Carry a backup card on a different network (Visa and Mastercard, for example). When one gets frozen or declines, the other keeps working.
• Set up autopay before you leave — for every US bill — with enough in the US account to cover it. Missed payments from abroad damage credit quietly and expensively.
• Keep the credit limit low on any card you don’t need. The card you carry abroad is the one that gets skimmed.

401(k) and retirement: keep it where it is

Moving abroad does not force a withdrawal from your 401(k). In most cases, the right move is to leave retirement accounts exactly where they are and let them keep growing.

What you should not do is withdraw early to “fund the move.” Withdrawals before 59½ typically trigger penalties on top of income tax, and the timing of a move is a terrible reason to pay them. If you do need to touch retirement money — for a down payment on a house abroad or to bridge a gap — understand the tax consequences first.

This is planning guidance only, not tax advice: Roth vs. traditional changes everything here. Roth accounts were funded with after-tax dollars, so qualified withdrawals are generally tax-free — but only if you understand the rules. Traditional accounts defer tax, which means withdrawals are taxed at whatever rate applies when you take them, and your expat status can change that math. This is exactly the situation where people make expensive mistakes — so it’s exactly where you pay a CPA who works with expats.

Taxes: the part nobody warns you about

US citizens are taxed on worldwide income — no matter where they live, no matter how long they’ve been gone. The US is one of the few countries that does this, and it surprises more expats than anything else.

Two tools exist to reduce double taxation, and you should understand both before you leave:

• Foreign Earned Income Exclusion (FEIE): may exclude a portion of foreign earned income from US tax.
• Foreign Tax Credit (FTC): may credit foreign taxes paid against US tax owed.

Which applies — and how — depends on your income type, your employer, and the countries involved. That’s why this stays planning context and not advice: hire a CPA who works with expats before you move, not after your first April 15 abroad.

And the filing requirement everyone forgets: if your foreign accounts exceed $10,000 in total at any point during the year, you must file an FBAR (FinCEN Form 114). The threshold is combined across accounts, and it’s per calendar year, not per day you’re abroad. Missing it is expensive to fix.

Mail and domicile: the address that still matters

Your US address does more work than you think. Banks, credit cards, the IRS, and your voter registration all send things to it.

• Mail forwarding: a trusted family member, or a mail-forwarding service that scans and forwards. Either way, someone should open, sort, and forward your mail — starting the week you leave.
• Legal domicile: your domicile is where you intend to return, and it drives voting, state taxes, driver’s license, and insurance. Some people keep a family member’s address; others use a forwarding service that supports domicile arrangements. Some states make this easier than others — and a few states have no income tax, which changes the math.
• Digital mail: many services scan envelopes and email you the contents, which beats asking a relative to describe every piece of mail.

Domicile is a legal concept with real consequences, so treat it as a research item with professional help — this is planning guidance, not advice.

SSN and Medicare: short notes

Your Social Security number doesn’t change when you move. What changes is how you use it.

For Medicare: if you’re 65 or approaching it, moving abroad does not remove the need to make enrollment decisions — there are deadlines and late-enrollment penalties tied to your timeline. The right answer depends on whether you’ll return and what your employer coverage looks like. Add it to your planning list; check with professionals before you make a call. Our FAQ covers the common expat questions people ask at this stage.

The pre-departure checklist

Don’t learn this the expensive way

Every item on this list is a month-three problem that costs far less to solve in month negative-two. You don’t need to become an expert — you need a plan, and the money runway to survive the gap while you figure out the rest. Our post on how much runway you need before moving abroad is where the money math starts.

The free 27-question readiness audit covers Money & Runway, Documents & Legal, Income & Work, Healthcare & Insurance, and Life, Logistics & Community — the five sections where moves actually fall apart. Take it before you start making calls.

And when you’re ready to close the gaps, book a free strategy call — we’ll tell you honestly which of these you can handle yourself and which are worth paying for. Our services page shows the done-with-you options if you’d rather not go it alone.

Planning guidance only — not legal, tax, or immigration advice. Verify requirements with licensed professionals for your situation.