Living abroad opens up a whole world of opportunities. New cultures, career growth, maybe even better weather. But it also opens up a can of worms with tax compliance that most people never see coming.
You’d think moving to another country would simplify your tax situation. Instead, you often end up dealing with two sets of tax rules, forms you’ve never heard of, and deadlines that don’t make sense. The complexity hits harder when you realize that ignoring it isn’t really an option.
Most expats learn this the hard way during their first tax season abroad.
Where You Live vs Where You Pay Taxes
Tax residency determines which countries can tax your income. But residency for tax purposes doesn’t always match where you actually live.
The US taxes citizens on worldwide income regardless of where they live. So moving to Germany doesn’t automatically get you out of US tax obligations. You still need to file US returns even if you owe nothing.
Other countries have different rules. Some tax based on physical presence. Others look at where your economic ties are strongest. A few countries consider you a tax resident if you spend more than 90 days there.
You can end up being a tax resident of multiple countries at once. Which creates the fun problem of potentially owing taxes to everyone.
Remote Work Breaks Traditional Income Rules
Different types of income get sourced to different countries under various rules. Your salary might be sourced to where you physically work. Investment income could be sourced to where the investment is held. Rental income usually gets sourced to where the property sits.
Remote work makes this even messier. If you live in Spain but work for a US company, where is that income sourced? What if you travel frequently for work?
Some countries have specific rules for digital nomads. Others are still figuring it out.
Tax Treaties Can Save You Money
Tax treaties between countries help prevent double taxation. But you need to actively claim treaty benefits. They don’t happen automatically.
Treaties often reduce withholding taxes on investment income. They might exempt certain types of business income. Some have provisions for students or temporary workers.
Reading treaty language feels like decoding ancient texts. But knowing what’s available can save significant money.
When Professional Help Makes Sense
Many expats eventually turn to professional expat tax services that specialize in cross-border tax issues, especially when dealing with complex situations involving multiple countries or significant assets.
The rules change frequently. Treaties get updated. Countries modify their tax codes. Keeping up with everything while managing your actual life and career becomes overwhelming.
Plan Before You Pack
Smart tax planning before you move can prevent problems later. Knowing the tax implications of different countries helps you make better decisions about where to live and work.
Some moves create immediate tax consequences. Others don’t hit until years later when you sell investments or change jobs.
The Reality Check
International tax compliance isn’t going away. It’s getting more complex as countries share more information and update their rules.
The key is knowing your obligations early and staying on top of them. Pretending they don’t exist usually makes things worse and more expensive to fix later.

