The US taxes you on your worldwide income. Not where you earned it. Not where you live. On all of it.

Most Americans who move abroad don't realize they're still filing US tax returns for the rest of their lives, or until they renounce citizenship. The IRS follows you. What changes when you leave isn't your obligation. It's how you structure it.

What we're going to do here is go deeper. Not scare you, because there's enough of that floating around in expat forums. The goal is to give you a clear, functional understanding of how the tax picture actually works for Americans living in the Western Hemisphere destinations that show up most often in the GSS framework: Panama, Costa Rica, Belize, Colombia, and the Dominican Republic.

This is educational context, not tax advice. Your specific situation, including income sources, timeline, family structure, and destination country, determines what this looks like for you. Before you make any decisions based on anything in this post, sit down with an international tax advisor who specializes in US expat returns. That's not a disclaimer thrown in to cover myself. It's the actual correct next step.

The Foundation: You Still File. Always.

US citizens file a federal tax return every year regardless of where they live. This is non-negotiable and it doesn't go away when you board a plane. What changes when you move abroad is what tools become available to you, tools that can dramatically reduce what you actually owe.

There are three primary ones. Understanding how they work and how they interact is the core of expat tax planning.

Tool One: The Foreign Earned Income Exclusion (FEIE)

The FEIE is the tool most people have heard of, and for good reason. It allows you to exclude up to approximately $130,000 of foreign-earned income from US federal income tax entirely. For a married couple where both spouses qualify, that's potentially $260,000 combined excluded from US tax.

To use it, you have to qualify through one of two tests.

The Bona Fide Residence Test says you've been a genuine resident of a foreign country for an uninterrupted period that includes a full tax year. It's more flexible but harder to prove if the IRS challenges it, because it's based on the totality of your intent and circumstances rather than a specific day count.

The Physical Presence Test is more mechanical: you were physically present in a foreign country for at least 330 full days during any 12-month period. The 12 months don't have to align with the calendar year. Most expat tax professionals prefer this test because it's straightforward to document.

One critical thing the FEIE does not cover: Social Security, pension income, investment income, dividends, capital gains, and passive rental income. If your income is primarily from these sources, which is common for retirees, the FEIE is less relevant to you than Tool Two.

Tool Two: The Foreign Tax Credit (FTC)

The Foreign Tax Credit gives you a dollar-for-dollar credit against your US tax bill for income taxes you've paid to a foreign government. If you paid $5,000 in income tax to Costa Rica, you can reduce your US tax liability by $5,000, subject to certain calculations and limitations.

When is the FTC better than the FEIE? When you're living somewhere that actually taxes you, like Trinidad and Tobago, which taxes residents on worldwide income. Or when your income exceeds the FEIE limit. Or when your income is passive, such as investments, pensions, or rentals, which the FEIE doesn't cover.

The most common mistake expats make is trying to use both tools on the same income. You can use the FEIE on earned income and the FTC on passive income in the same year, but they cannot overlap on the same dollars. This is the kind of interaction that a general CPA who doesn't specialize in expat returns will often miss, and it can cost you.

For the Western Hemisphere destinations in the GSS framework: Panama, Costa Rica, Belize, and the Dominican Republic all operate on territorial tax systems, so they don't tax foreign-sourced income at all. In those destinations, the FEIE is typically the primary tool. Colombia taxes residents on worldwide income after a certain period of residency, which makes the FTC more relevant there. Every destination is different, and the tool selection is destination-specific.

Tool Three: The Foreign Housing Exclusion

This one gets missed constantly, and even when people do know about it they don't fully understand how the math works.

Here's the simple version. The IRS knows that everyone spends something on housing no matter where they live, so they build in a baseline amount that doesn't count toward the exclusion, roughly $20,800 for 2025. You can only exclude what you spend above that baseline. Think of it as the IRS saying: the first $20,800 of your housing costs are just life, but anything beyond that, we'll let you shelter.

So if you're paying $2,000 a month in rent plus $400 in utilities, that's $28,800 a year in housing costs. Subtract the $20,800 baseline and you're left with $8,000. That $8,000 gets excluded from your US taxable income on top of whatever the FEIE is already sheltering. That's real additional tax reduction that most people filing without a specialist never claim.

The higher your housing costs, the bigger the exclusion. Which is why the Dominican Republic's notoriously high electricity bills, $600 or more a month, actually work in your favor here. Painful in the monthly budget, but they push your housing costs higher and increase what you can exclude.

This exclusion is only available if you also qualify for and claim the FEIE. And what counts as housing costs includes rent, utilities, renters insurance, and internet, but not mortgage principal, furniture, or domestic help.

FBAR and FATCA: The Reporting Obligations That Aren't Optional

These are not tax tools. They are mandatory reporting requirements, and the penalties for ignoring them are severe enough that they deserve their own section.

FBAR, the Foreign Bank Account Report, must be filed if you have more than $10,000 in foreign bank accounts at any point during the year, combined across all accounts. The filing deadline is April 15 with an automatic extension to October 15. A non-willful violation starts at $10,000 per account per year. A willful violation is significantly worse.

FATCA, Form 8938, must be filed if your foreign assets exceed $200,000 at year-end or $300,000 at any point during the year. It's a separate filing from FBAR and covers a broader range of foreign financial assets.

Most people moving abroad open a local bank account within their first few months. Most of them don't know FBAR exists until someone mentions it in a Facebook group a year later. By then they've already missed a filing they didn't know they were required to make.

File it. Every year. No exceptions.

How the Destination Country's Tax System Affects Your Planning

This is where the planning gets destination-specific, and why the conversation about taxes has to happen alongside the conversation about where you're going, not separately from it.

Panama. Territorial tax system. No tax on foreign-sourced income. FEIE reduces US tax. Strong combination.

Costa Rica. Territorial tax system. Same structure as Panama. FEIE is the primary tool.

Belize. QRP holders pay zero Belizean taxes on foreign income. No capital gains tax. No inheritance tax. FEIE reduces US tax. No US-Belize tax treaty as of this writing.

Dominican Republic. Territorial system. No tax on foreign-sourced income for residents. FEIE reduces US tax. The DR's high electricity costs actually increase your Foreign Housing Exclusion benefit, which is a real silver lining in a painful budget line.

Colombia. More complex. Colombia taxes residents on worldwide income after a certain period of residency. The FTC becomes more relevant. This is one of the destinations where the tax planning conversation has to happen early and with someone who knows the Colombian system specifically.

What You Need to Have Sorted Before You Move

This is the part that almost no one does correctly, because the instinct is to figure out the tax situation once you arrive. By then you've already made decisions that affect your filing: when accounts were opened, when income started, which residency test you're trying to meet.

  • Get an international tax advisor who specializes in US expat returns before you move. Not after. Before. Specifically someone who knows the destination country's tax system alongside the US side, because both matter.
  • Confirm which residency test you're going to use for the FEIE and start documenting from day one. The Physical Presence Test requires 330 days, and that clock starts when you land.
  • Know your FBAR threshold and set a calendar reminder to file before October 15 every year. If you open a foreign account with more than $10,000 at any point, the obligation exists.
  • Understand your income sources and which tools apply to each. Earned income, passive income, pension, Social Security: each one interacts differently with the FEIE, the FTC, and the Housing Exclusion.
  • Budget for a specialist. A CPA who does expat returns properly costs more than a standard filing. It costs significantly less than the mistakes, missed elections, and penalties that come from filing incorrectly.

The Bottom Line

The tax picture is not a reason not to move internationally. For a lot of people it's actually one of the strongest arguments for it. The tools available to Americans living abroad are genuinely powerful when used correctly. But they have to be set up intentionally, with the right professional, before the move happens.

That's the difference between a move that works financially and one that creates problems you spend years cleaning up.

Figures such as the FEIE limit and the housing baseline change every year. Confirm the current numbers with your tax advisor.

Check your Relocation Readiness. It's free, and it takes less time than the last Facebook thread you scrolled: globalsystemsstudio.com/tools

Disclaimer: I am not an international tax advisor or an international attorney. Always consult a licensed professional who specializes in your destination country before making any financial or legal decisions.