So here's something that catches a lot of people off guard when they start working abroad. The US has this pretty unique tax situation compared to most countries in the world. While most nations only tax income earned within their borders, the US taxes its citizens on their worldwide income no matter where they live or earn money. Honestly, only a couple of other countries do this - it's not exactly common practice.

This creates a real problem if you're living and working overseas. Say you move to Mexico or Thailand and get a job there. You still owe US taxes on that income, and you'll need to file a US tax return reporting everything. But here's where it gets messy - the country you're actually living in probably wants to tax that same income too. So you could end up paying tax to two different governments on the same earnings.

The good news is the US tax code has some built-in protections to help with this double taxation issue. The Foreign Earned Income Exclusion is one of the main ones. If you qualify, you can exclude a certain amount of your foreign income from your US taxes. Back in 2023, that threshold was $120,000. You need to meet specific requirements though - either you're a bona fide resident of a foreign country for a full tax year, or you're physically present abroad for at least 330 days in any 12-month period.

There's also the Foreign Housing Exclusion if you qualify. This lets you deduct what you actually pay for housing overseas, though there are limits - your place can't be considered too luxurious, and the deduction can't exceed your foreign income exclusion amount.

Another route is the Foreign Tax Credit. Basically, if you paid taxes to a foreign country, the US generally lets you take a credit for those taxes rather than paying double. This usually works better than itemizing foreign taxes separately.

Now here's something important for digital nomads and remote workers - if you're earning US-based income while living abroad, you're definitely paying US taxes on that. But you might still owe taxes to your country of residence too. Most countries define residency as spending 183 days or more per year there, and they'll tax all your income regardless of where it comes from. Though some countries do use a territorial tax system where they only tax income earned within their borders.

The takeaway? Do other countries pay taxes differently than the US? Absolutely. Some use territorial systems, others use residency-based systems. The specifics matter a lot for your situation. If you're working internationally or planning to, you really need to sit down with a tax professional who understands cross-border income. The rules can get complicated fast, and getting it wrong gets expensive.