How do I know if I actually owe U.S. taxes while living abroad?

It depends on your income level, where you live, and how that country’s tax system interacts with the U.S. Importantly, filing a U.S. tax return does not automatically mean you owe money to the IRS. Many expats file but end up owing nothing.

In general, you may have a U.S. tax liability if your income exceeds the Foreign Earned Income Exclusion (FEIE) limit and you pay less tax in your country of residence than you would in the U.S.

However, if you live in a higher-tax country, such as many in Western Europe, you will often owe little to no U.S. tax. This is because the Foreign Tax Credit (FTC) allows you to offset U.S. taxes with the taxes you’ve already paid abroad.

The FEIE tends to be more beneficial in lower-tax countries, as it allows you to exclude a portion of your earned incomefrom U.S. taxation. The FTC tends to be more useful in higher-tax countries, where the foreign taxes you already paid may reduce or eliminate what you owe to the IRS.

In short: you may still need to file a U.S. tax return, but with the right exclusion or credit, you may not actually owe anything.