Hey,
There's a window open right now that most people living abroad aren't paying attention to.
The dollar is strong against almost every currency your life is priced in.
Peso. Baht. Rupiah. Colón. Sol. Euro.
Every dollar you earn buys more of all of them than it did two years ago. And that gap, between what you earn and what everything costs, is wider right now than it's been in years.
Most expats just let this happen passively. They earn in dollars, spend in local currency, and assume the exchange rate is just whatever it is.
The ones winning right now are actively working the gap.
Here's exactly how.
◆ // THE PLAY
Currency Arbitrage, Working the Gap Actively
Currency arbitrage means actively managing the difference between what you earn in dollars and what things cost in local currency, instead of just letting the exchange rate happen to you. Most people think of currency arbitrage as something hedge funds do. It's not. It's something you do every time you decide when and how to convert your dollars.
THE CONVERSION TIMING PLAY
Exchange rates move on news, Fed decisions, and market sentiment. When the dollar is unusually strong, convert more than you need in that moment. Example: the dollar spikes after a Fed announcement. Instead of converting just enough for this month, you convert three months' worth of expenses at once. You lock in the strong rate before it has a chance to weaken again, and the next two months are already covered at today's price.
THE BANK ARBITRAGE PLAY
Most banks charge hidden fees on currency conversion, 2-4% worse than the real market rate. On $2,000 a month that's $40-80 disappearing every single month. The fix: use Wise (https://go.expatbuildr.com/wise) for all conversions. Real rates, transparent fees. The difference adds up to $500-1,000 a year.
THE INCOME CURRENCY PLAY
If you have any control over how you invoice, invoice in USD. Always. When you invoice in a client's local currency, you're the one absorbing every dip if the exchange rate moves against you before the payment clears. Invoice in USD and that risk becomes the client's problem, not yours. Let the client absorb the conversion cost, not you.
THE SAVINGS CURRENCY PLAY
Keep your savings in USD, not local currency. Local currencies in expat destinations tend to depreciate against the dollar over time, so money sitting in pesos or baht slowly loses value even if the number in the account stays the same. The fix: keep one to two months of actual living expenses, rent, food, bills, in local currency so it's ready to spend. Everything beyond that stays in dollars.
◆ // THE NUMBER
2-4%
That's the typical hidden markup banks charge above the real mid-market exchange rate. A few different currency researchers landed on roughly the same range when I looked into it, banks just don't itemize it as a fee, it's baked straight into the rate they hand you.
Run the math on a real expat budget. Convert $2,000 a month through a typical bank at a 3% markup, and you're losing $60 a month, $720 a year, to a cost you never actually see written down anywhere. Convert through a real mid-market rate service instead, and that $720 stays in your pocket.
That's just one conversion habit. Add wrong-currency invoicing or savings sitting in a depreciating local currency, and the real number climbs well past that.
◆ // THE TOOL
This is the one tool in the currency stack that does the most work. Real exchange rates, transparent fees, and it's what I use for every conversion between what I earn and what I spend.
Setting it up takes about 10 minutes:
Go to go.expatbuildr.com/wise and create your account
Verify your identity with a government ID, passport works fine
Add your USD bank account as your funding source
Open a multi-currency balance for whatever local currency you're spending in
Link your Wise debit card if you want to spend directly from it, optional but useful
Avoid this pitfall: sign up using the country you actually live in right now, not the country you're planning to move to, and not wherever you happen to be on vacation when you remember to do it. Wise ties your account to your current residency, and setting it up from the wrong country can cause verification headaches or limit which currency balances you can open. If you're mid-move, wait until you've actually landed before creating the account.
Set it up once, use it forever. The difference versus a bank shows up in the first transfer. And whichever of the 15 arbitrage countries you're in or headed to, Southeast Asia, LatAm, or Europe, Wise works in all of them.
If you're running an actual business on this income, not just spending it, the deeper breakdown on structuring this properly is here → expatbuildr.com/blog/market-arbitrage/currency-strategy-founders-usd-sea
◆ // THE MOVE
This week, calculate your currency leak.
Pull your last 3 months of bank statements. Find every international transfer or currency conversion. Compare the rate you got to the real rate on XE.com that day.
The difference is your leak. Multiply it by 12. That's your annual currency tax.
If it's over $500, open a Wise account today (https://go.expatbuildr.com/wise) and route your next conversion through it.
Tag me on Instagram or X with your leak number → @ExpatBuildr. The most surprising one gets featured next issue.
◆ // PROMPT OF THE WEEK
Paste this into any AI chat, swap in your real numbers:
"I spend $[amount] a month converting USD to [local currency]. Banks typically markup the exchange rate 2-4% above the real mid-market rate. Calculate what that markup is costing me annually, then tell me exactly how much I'd save per year switching to a service like Wise that charges under 1%. Give me the dollar amount, not just the percentage."
Run it, then DM me on Instagram @ExpatBuildr and tell me your number. Best one gets featured next issue.
— Galaxy (Tony Long II) 🌏
Building from Cebu. Earning in USD. Sharing the math.
P.S. — Free forever → newsletter.galaxyarbitrage.com/subscribe
P.P.S. — Move the dollars right → https://go.expatbuildr.com/wise