Mexico is the most popular destination for American expats in the world, and its tax system is the most complex of any country in the region for US citizens. Mexico taxes residents on worldwide income. The US taxes its citizens on worldwide income. Both systems apply simultaneously — and managing the overlap is the central tax planning challenge for Americans in Mexico.
The good news: the US-Mexico tax treaty provides mechanisms to avoid true double taxation. Foreign tax credits and the Foreign Earned Income Exclusion reduce the practical burden for most Americans. The bad news: “reduced” is not the same as “eliminated,” and Mexico’s top rate of 35% makes it a high-tax environment by regional standards.
Does Mexico Tax Foreign Income?
Yes. Mexico’s ISR (Impuesto Sobre la Renta) applies to the worldwide income of Mexican tax residents. This includes foreign dividends, foreign interest, foreign rental income, and income from remote work for foreign employers. There are no blanket foreign income exemptions for new residents.
However, the US-Mexico tax treaty allows you to credit taxes paid to the US against your Mexican liability (and vice versa), preventing true double taxation. The net amount you owe Mexico depends on your specific income mix and what you have already paid to the US.
Tax Residency
You become a Mexican tax resident if you spend 183 or more days in Mexico in a 12-month period (consecutive or not). The 12-month period does not need to align with the calendar year. Once established, you are treated as a resident for the full year in which residency is triggered.
Mexican residency for tax purposes is separate from immigration residency. You can be in Mexico on a tourist visa and become a tax resident purely through day count.
You can also establish Mexican tax residency by having your “base of operations” — your primary home and center of economic activities — in Mexico, even without 183 days.
ISR Rates
Mexico’s income tax rates are progressive:
- Up to MXN $8,952/year (≈ $450 USD): 1.92%
- Gradually increasing brackets through the middle range
- Above MXN $3,000,000/year (≈ $150,000 USD): 35%
The effective rate for a resident earning $80,000 USD equivalent in Mexico is approximately 20–25%. For someone earning $200,000 USD, the effective rate climbs toward 30–32%.
The US-Mexico Tax Treaty
Mexico is one of only a handful of Latin American countries with a comprehensive US income tax treaty. The treaty covers:
- Elimination of double taxation: Income taxed in one country generates a credit against the other country’s tax on the same income
- Dividend treatment: Reduced withholding rates on cross-border dividends
- Business income: Business profits are taxed where the permanent establishment is located
- Pensions: Treatment of US pensions received in Mexico
Canada and the UK also have tax treaties with Mexico, making Mexico one of the best-covered countries in the region for treaty benefits.
The FEIE and Mexico
Americans in Mexico can potentially use the Foreign Earned Income Exclusion (FEIE) to exclude up to approximately $126,000 (2025) of foreign-earned income. FEIE applies to “earned income” — wages, salaries, net self-employment income — not to passive income like dividends, interest, or capital gains.
If you work in Mexico for a Mexican employer or run a business in Mexico, FEIE can shelter a significant portion of that income from US taxation (while Mexico taxes it at local rates, generating credits). For retirees on investment income, FEIE is less relevant.
Crypto Tax Rules
Mexico’s SAT (tax authority) treats cryptocurrency disposals as taxable events. Crypto gains are included in income and taxed at standard ISR rates. Mexican exchanges are required to report transactions. For casual crypto investors, the impact depends on the size of gains relative to the treaty credit situation.
Exiting Mexican Tax Residency
To exit Mexican tax residency, you must spend fewer than 183 days in Mexico and ensure your primary home and economic activities are no longer based there. You must also notify the SAT and update your RFC (tax ID) status. The notification process requires filing a final return for the portion of the year you were resident.
Important: merely leaving Mexico does not automatically end your tax residency status. You must formally notify the SAT.
Practical Reality for Most Americans
Most Americans living in Mexico on relatively modest income — Social Security, a small pension, rental income from a US property — will find that their US tax obligations consume most or all of their total tax budget, with Mexico collecting little additional due to treaty credits. Americans with larger incomes, particularly business income or high investment returns, need more careful planning around the treaty interaction.
Or explore our Mexico Residency service.
Mexico Tax Planning Starts With Residency
Do not begin with a rate table. First determine whether Mexico considers you tax resident under its current tests, then classify salary, services, pensions, dividends, rent, and capital gains separately. The treaty with the United States can coordinate taxing rights, but it does not erase filing or reporting obligations in either country.
Keep evidence of where work is performed, where a business is managed, and where your family and economic interests are located. A US bank account or US customer does not automatically make services foreign-source if the work is performed from Mexico. Conversely, a Mexican account does not make every receipt Mexican-source.
Common Errors to Avoid
- Confusing immigration residency with tax residency.
- Assuming the treaty means no Mexican filing is required.
- Ignoring payroll, VAT, social-security, or local-business obligations.
- Using an old exchange rate or threshold without checking the current SAT guidance.
Use our Mexico residency guide for immigration planning and obtain current advice before changing your work location or entity structure.
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