Taxes

US-Mexico tax obligations — guide for Mexican diaspora

Cross-border US-Mexico taxation: tax treaty, FBAR for Mexico accounts, FATCA implications, non-resident withholding, dual nationality.

Flag: Alex Covarrubias, 9 April 2006. Based on the arms by Juan Manuel Gabino Villascán. · Public domain · via Wikimedia Commons

US-Mexico tax obligations

If you’re a Mexican citizen living in the US or US citizen with assets in Mexico, you have cross-border tax obligations with two systems: US IRS and Mexico tax authority. This guide covers main points.

Official IRS tax treaty status — verified data

Official source: IRS — US Income Tax Treaties A-Z

Verified on: 2026-05-25

✅ Mexico HAS a tax treaty with the US confirmed on the official IRS list.

Treaty documents: https://www.irs.gov/businesses/international-businesses/mexico-tax-treaty-documents

US-Mexico Income Tax Convention (1992, amended 2002)

Latin American countries with US tax treaty

Only 3 Latin American countries have a tax treaty with the US (IRS data 2026):

Chile (signed 2010, in force 2016)
Mexico (signed 1992, amended 2002)
Venezuela (signed 1999 — limited use due to sanctions)

Without treaty: what happens

If Mexico has NO tax treaty:

Mexico income is subject to US tax if you’re a US tax resident
NO reduced withholding rates on dividends/interest
Can claim Foreign Tax Credit (Form 1116) to avoid double taxation

Your Mexico tax ID

In Mexico, the tax ID is called RFC (Federal Taxpayer Registry). If you worked or had income in Mexico, you should have one.

Your US tax ID

If you have SSN: use it
If you don’t have SSN: you need ITIN from IRS — see ITIN complete guide
ITIN allows fulfilling US tax obligations without work authorization

✅ US-Mexico tax treaty

The US and Mexico signed a tax treaty in 1992 reducing double taxation and withholding on certain income types.

Treaty benefits:

Reduced withholding on interest + dividends (typically 10-15% vs 30% without treaty)
Tax credit available for taxes paid to receiving country
Pensions: generally only taxed in country of residence
Wages: non-resident employees with limited presence exempt in some cases

How to apply treaty benefits:

Form W-8BEN for non-residents (bank/employer US)
Form 8833 Treaty-Based Return Position Disclosure on your federal return
Form 1116 Foreign Tax Credit for cross-credits

FBAR (FinCEN 114) — accounts in Mexico

If you’re a “US Person” (US citizen, permanent resident, or tax resident via Substantial Presence) and have bank accounts in Mexico whose combined balances exceeded $10,000 USD at any point in the year, you MUST file FBAR (FinCEN Form 114) annually.

Deadline: April 15 (automatic extension to October 15)
Cost: FREE (electronic via bsaefiling.fincen.treas.gov)
Penalties: $10,000-$100,000+ for non-filing

See: FBAR complete guide

FATCA (Form 8938) — assets in Mexico

If your Mexico financial assets (bank accounts, stocks, funds) exceed FATCA thresholds, you must file Form 8938 with your federal IRS return.

Thresholds (US Persons living in US):

Single: $50,000 at year-end
Married filing jointly: $100,000 at year-end

See: FATCA complete guide

US + Mexico dual nationality

Mexico allows dual nationality with US. If you naturalize as US citizen, you keep Mexican nationality (verify Mexico’s current rules).

Dual nationality tax implications:

Still tax with IRS on worldwide income (US taxes by citizenship)
Still tax with Mexico tax authority on income generated in Mexico (tax residency)
Cross Tax Credits (US Form 1116 + equivalent Mexico credits) mitigate double taxation

Currency and conversion

Mexico: MXN (Peso mexicano). When reporting Mexican income to IRS, you must convert to USD using IRS-published annual average exchange rate or December 31 rate.

If you have a business (Self-Employment / Independent Contractor)

If you live in US with ITIN and have freelance/business income:

Schedule C (business profit/loss)
Schedule SE (Self-Employment Tax 15.3%)
1099-NEC from your US clients
FEIE does NOT apply (you’re IN the US, not abroad)

See: Filing taxes with ITIN

Official source: IRS International Taxpayers · FinCEN FBAR

Cross-border tax obligations are complex — consult a CPA or tax attorney with international experience.

Last verified: 2026-05-25.

General procedural information for educational purposes. Not legal, tax, or immigration advice. Laws and fees change — verify with the issuing agency before taking action. For case-specific guidance, consult a licensed immigration attorney or other appropriate professional.

ITIN — file federal taxes without SSN — required for federal and most state filings
ITIN-friendly business banking — for self-employment income
Form an LLC to structure business income — pass-through tax treatment under ITIN
Driver’s license requirements by state (DMV) — residency for state tax purposes
Find legal help for tax issues — VITA + low-income tax clinics

Frequently asked questions

Do the US and Mexico have a tax treaty?

Yes. Mexico has an income-tax treaty with the US (the US-Mexico Income Tax Convention), confirmed on the official IRS treaty list. A treaty can reduce withholding on some income and helps define which country taxes what — but you still generally report worldwide income to the IRS if you are a US tax resident.

Do I have to report my income from Mexico on my US taxes?

If you are a US tax resident (a citizen, green-card holder, or someone who meets the substantial-presence test), you generally report your worldwide income to the IRS — including income earned in Mexico. Non-residents are taxed only on US-source income. The Foreign Tax Credit or the Foreign Earned Income Exclusion can prevent double taxation.

Do I have to report my Mexico bank accounts (FBAR/FATCA)?

If the combined value of your foreign financial accounts — including accounts in Mexico — exceeds $10,000 at any point in the year, you must file an FBAR (FinCEN Form 114) electronically. Higher-value foreign assets may also require Form 8938 (FATCA) with your tax return. These are reporting forms, not extra taxes.

How do I avoid being taxed twice by the US and Mexico?

Two main tools: the Foreign Tax Credit (Form 1116) credits taxes you paid to Mexico against your US tax, and the Foreign Earned Income Exclusion (Form 2555) can exclude a large amount of foreign-earned wages if you live abroad. You generally choose the one that lowers your total tax — a cross-border preparer can confirm which fits your situation.

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General information, not legal advice. MigrantUSA is an independent publisher and is not a law firm; using this site does not create an attorney-client relationship, and this content is not a substitute for advice from a licensed attorney about your specific situation. US federal, state, and local government procedures, fees, and forms change. Always verify current details directly with the relevant agency before acting. For immigration, tax, or other legal matters specific to your situation, consult a licensed attorney or BIA-accredited representative.