🇲🇽 Tax residency in Mexico

Mexico is one of the countries where counting days gives you the wrong answer. The 183-day figure gets quoted everywhere, but day count is not the primary test here. The SAT decides residency on your centre of vital interests: whether your home, and the core of your personal and economic life, is in Mexico. You can be resident on far fewer days, and conversely a long stay does not by itself settle the question the way it does in strict day-count countries.

What ties the SAT weighs: a home in Mexico, especially one you live in as your main base rather than rent out. A spouse or children living in Mexico. The bulk of your income arising from Mexican sources, or a business registered or managed there. The SAT looks at the totality of your circumstances; it wants to know where you live, not where you slept for a few months.

If you do become resident, Mexico taxes your worldwide income. Income from foreign clients is not out of reach just because it never touches a Mexican bank account. The system is progressive, with a top marginal rate of 35%; lower brackets take the first slices, but a full-time remote income can climb well into the upper rates, and local social security applies on top if you are employed in Mexico.

There is no special tax regime for digital nomads. No reduced rate, no foreign-income shelter for remote workers; the general resident rules apply. Running income through a Mexican company changes the picture to corporate taxation, which is its own subject and not a shortcut around personal residency.

On double taxation: Mexico has an income tax treaty in force with the United States. US citizens file US returns on worldwide income wherever they live; the treaty and the US foreign tax credit rules are what prevent the same income being taxed twice, with Mexican tax paid typically creditable on the US side. For the UK, Germany, or any other home country, relief depends on the specific treaty in force between that country and Mexico; check the official treaty lists rather than assuming, since residency definitions in a treaty can differ from domestic law.

A local accountant is worth the money when your position is genuinely uncertain: significant time in Mexico with a home there, mixed income streams (freelance, investments, rental), property, or a Mexican business. An adviser who knows SAT practice can document your residency position and keep you compliant, which is far cheaper than defending an assessment after the fact.

Mexico looks at where your life is centred, not at your flight stamps.

This information is for educational purposes only and does not constitute legal or tax advice.