A few years ago I logged into our company account and the balance was zero.
The night before, it had over $250,000 in it.
The bank had frozen everything overnight.
Why?
Because the final page of a rental contract we uploaded weeks earlier was missing.
One missing page, and a bank decided that was enough. It took weeks to get access back (the full story is here).
That’s how fast access can vanish when you bank across borders.
I’ve made plenty more mistakes since I left Germany in 2020. Six of the more expensive ones are here.
The pattern behind all of them is the same.
Banking abroad has rules that don’t apply at home, and most people find out about those rules the hard way.
I talk to people who are about to leave their home country every week (find out more here).
Most are about to make the same banking mistakes without knowing it.
Which is why I put some common ones in this article, so you can know about them (and avoid doing them yourself).
We’ll cover:
Seven banking mistakes that you should know about (and avoid)
Where each one shows up (US bank, new country, and the fintech in between)
The account setup that fixes most of them at once (and only takes a few weeks)
Let’s start.
Mistake #1: Keeping all your money in one country
Most Americans move abroad with every dollar still sitting in one place.
All of it in the same banks and brokerage they’ve used for decades, in the country they’re about to leave.
It feels safe because the setup is familiar.
But when one country holds all your money, one government and one banking system stand between you and everything you’ve saved.
If that system freezes accounts or changes the rules overnight, you find out with no warning. Ask anyone who banked in Cyprus in 2013 (the country seized 47.5% of deposits over €100,000 to keep its banks alive).
Spreading your money across more than one country is simple risk management.
You stop handing a single system the power to cut you off.
I made the full case for a second home for your wealth here.
Takeaway: One country holding all your money is a bad idea.
Mistake #2: Assuming all US banks work fine from abroad
The plan most people have is “no plan”.
Keep the same US accounts and carry on as if nothing changed.
Then the letter arrives.
In 2025, US banks and brokerages closed an estimated 340,000 expat accounts. Wells Fargo stopped opening brokerage accounts for people living outside the US back in 2021, and Merrill Lynch, Morgan Stanley, Vanguard, Fidelity, and USAA have all restricted or closed accounts for Americans with a foreign address. At many banks, a single login from a foreign IP triggers a review.
The same thing happened to me while I was living in Cyprus.
My German broker decided overnight to stop serving clients across most of the EU.
I had 30 days to close every position and move the money out.
Thirty days.
Some of my stocks were down, but it didn’t matter.
The policy changed, and I was simply an inconvenience to get rid of.
The fix is boring (but it works).
Keep a US account, but choose one that accepts foreign residents. Charles Schwab and Interactive Brokers are the two names that come up most in expat circles. Tell them you’re moving, ask in writing (!) whether you can stay on as a non-resident.
I broke down the US home base account as part of the “3-Account-Setup” here.
Takeaway: Confirm your US bank will keep you as a non-resident before you move, not after the closure letter arrives.
Mistake #3: Treating your local account as a place to store wealth
You need a local account.
It lets you access payment systems where you live, paying rent and tapping the QR code at the corner restaurant.
Always get a local account.
But a spending account and a place to store wealth are two different things.
Your new country has its own ways of making your financial life harder.
Argentina froze every bank account in December 2001 and capped cash withdrawals at 250 pesos a week, the “corralito.” Dollar accounts stayed locked unless you agreed to convert them to pesos.
Greece capped ATM withdrawals at €60 a day in 2015 and kept the banks shut for three weeks while it blocked money from leaving the country.
Those are just two examples. There are plenty more, across Europe and beyond.
My two Thai accounts handle rent and everyday spending, and the balances stay small on purpose (my savings live nowhere near them).
Any foreign account over $10,000 also puts you on the hook for US reporting via FBAR (with Form 8938 being relevant once your foreign assets get larger), explained in full here.
Takeaway: Use your local bank for groceries but keep your wealth somewhere else.
Mistake #4: Treating bank selection as a one-time transaction
At home, opening a bank account is “an errand”.
Fill in a form, get a card, and never speak to the bank again.
That works fine in the US, where the system runs on sheer scale. Bank branches are everywhere and a standard process for everything.
Nobody at the bank needs to know who you are for your money to move.
Cross a border and the relationship becomes the actual product. When a wire gets held for review, or a compliance officer wants to know where $80,000 came from, you are “a stranger” emailing a general inbox in a different time zone.
I learned what that costs.
When that company account got frozen over a missing contract page, the mistake was ours.
What made it brutal was having no one between us and the bank.
No guide, no one who could deal with the institution on our behalf. So it took weeks (instead of an afternoon).
Banking has been drifting toward ongoing advisor relationships and away from one-off transactions for years.
But cross-border, the relationship that matters goes through whoever placed you at the bank.
They handled the compliance, they know your file, and they talk to the bank so you don’t have to. For someone running money across two or three countries, that is worth more than a tenth of a percent on a savings rate.
So when you set up money abroad, treat it as an ongoing relationship.
Work with someone who keeps it running long after the account is open.
Takeaway: Set up the account and the relationship behind it.
Mistake #5: Holding everything in one currency
Currency risk is one that you might be aware of already.
There are two versions of the mistake:
Holding everything in dollars when your rent and groceries are priced in euros or another currency, so a weak dollar affects your savings.
Converting your whole nest egg into the local currency the month you arrive, then watching that currency slide.
I paid for this one directly.
In 2023 I needed 60,000 euros converted to baht to buy a condo in Thailand.
The baht was sitting at 35 to the euro (normally around 37 to 38). I needed the money that month, so I converted at 35 and moved on. That timing cost me about 180,000 baht, close to 5,000 euros, on a single transfer.
The fix is to stop being forced into bad timing. Hold more than one currency so you are never trapped converting everything at the worst moment.
Move money in lump sums when the rate is in your favor.
A multi-currency account lets you park dollars, convert to euros or baht when the rate is good, and earn interest on whichever one you hold.
If you want the mechanics of multi-currency accounts and how fintechs handle this, I covered it here.
Takeaway: There is no way to control exchange rates, but you can avoid being forced to convert everything at the worst possible time.
Mistake #6: Expecting it to work like opening an account at Chase
In the US, opening an account takes 20 minutes and an ID. Walk in, sign, done.
People assume the rest of the world works the same way (it does not).
International banks ask for things American banks (almost) never do.
They want proof of where your money came from, a bank reference, sometimes a local tax number or an in-person visit you have to fly in for.
Many set minimums in the tens or hundreds of thousands. And thanks to FATCA, plenty of foreign banks reject American clients outright rather than deal with the US paperwork.
The “source of funds” question alone stops people cold, because most have never had to prove, on paper, where their savings came from.
Offshore banking gets called secretive, but the truth is actually the opposite. The compliance is stricter than anything you deal with at home.
None of this means you did something wrong.
Banks default to caution with a foreign client they don’t know, so the burden of proof lands on you. Show up unprepared and you wait months (or get rejected and start over somewhere else).
The fix is, as you might have guessed, preparation.
Have your documentation ready before you apply. Proof of source of funds, certified ID, the lot.
Much of it overlaps with the document stack you should have ready before you move anyway.
This is also where working through someone who handles the KYC for you earns its keep, because they know what each bank wants and assemble it before the bank has to ask.
Takeaway: Abroad, the account goes to whoever shows up with the paperwork already done.
Mistake #7: Wiring money every time you need cash
Plenty of people run their life abroad one wire at a time.
Need money this month?
Send a wire.
Need more in three weeks?
Send another.
Each one costs you.
A traditional bank charges $25 to $50 per international wire. Do that every few weeks and you bleed thousands a year, all of it invisible because no single transfer feels big.
The steady drip of small transfers can also draw the kind of compliance attention you don’t want.
The fix is to move money in set amounts on a schedule.
One larger transfer each quarter to your local spending account instead of a dozen small ones, and a fintech bridge converts at favorable rates.
Takeaway: Set up how your money moves abroad once, and you stop paying for it every few weeks.
The account that removes the most risk
Almost all of these come back to one thing.
Money sitting inside your home country and your new one, and nowhere else.
What’s missing is one account that sits outside both countries.
Adding one won’t erase the whole list.
You still have to tell your US bank you’re moving, prepare your documents, and time your conversions. But no single step removes more risk at once.
I call it the “fourth account”, sitting on top of the three most people already have:
US home base
Fintech bridge
Local spending account.
I made the full case in The Bank Account They Can’t Touch, so I’ll keep it short here.
What that one account covers:
Money stops sitting under a single government (mistakes 1 and 3)
Holds several currencies so you can convert on good days (mistake 5)
Works as the funded backup if a US bank drops you (mistake 2)
Lets you run your spending off one quarterly transfer instead of a dozen wires (mistake 7).
Set it up through the right people and the compliance and the relationship come with it (mistakes 4 and 6).
Most international banks won’t open these accounts for Americans. FATCA makes US clients expensive to serve, so they pass.
That’s the part I help with.
I work through a Swiss-based family office that manages around $7 billion and holds relationships with more than 50 banks across Panama, the Bahamas, and the Caribbean.
I put the whole setup into a guide.
Download it here for free.
Conclusion
That’s it.
Seven mistakes, and almost all of them come back to where your money sits.
One thing that you can do today:
List every account you hold, which country it sits in, and how fast you can access your money if something happens.
The answer tells you whether you need to make a change.
Appreciate having you here,
— Ben
PS: If you want to open up your own fourth bank account, check out this video. And below the video, there is an option to book a call to get things started.
A useful reminder that international banking can come with unexpected challenges. Knowing these common mistakes beforehand can save a lot of time, money, and stress.
A perfect piece of advice. Thanks 🙏