Mexico

For Dual Citizens and U.S. Residents with Mexican Ties

Mexican-American dual citizens and foreign nationals who have moved to the U.S. often retain business interests, financial accounts, and retirement savings in Mexico. The U.S.-Mexico tax treaty provides a framework for cross-border income, but treaty benefits do not eliminate the reporting and compliance obligations that attach to Mexican holdings once a person is a U.S. tax resident. We work with clients who moved from Mexico to the U.S. and retained holdings there, dual nationals managing ongoing Mexican business interests, and individuals planning to relocate to the U.S. who want to understand and restructure their Mexican positions before arrival.

The U.S.-Mexico Tax Treaty

The U.S. and Mexico have a comprehensive income tax treaty that covers employment income, business profits, pensions, and other income categories. Key provisions relevant to U.S. residents with Mexican-source income:

• Reduced withholding rates on dividends, interest, and royalties paid from Mexico to U.S. residents
• Tie-breaker rules for determining tax residency when both countries assert residency
• Provisions for government and social security income
• Savings clause: the U.S. retains the right to tax its citizens and green card holders on worldwide income regardless of the treaty, with limited exceptions
• Form 8833 must be filed to claim treaty-based positions that override the Internal Revenue Code

The treaty does not eliminate U.S. filing or reporting obligations. It adjusts how certain Mexican-source income is taxed and can reduce withholding on cross-border payments.

Mexican Entity Reporting

U.S. persons with ownership interests in Mexican businesses have annual reporting obligations that apply regardless of where they live:

• SA de CV (Sociedad Anónima de Capital Variable) — treated as a foreign corporation for U.S. tax purposes. U.S. shareholders meeting ownership thresholds must file Form 5471 annually. If the SA de CV is a controlled foreign corporation (CFC), Subpart F income and GILTI inclusions may apply each year even if the company makes no distribution.
• S de RL de CV (Sociedad de Responsabilidad Limitada de Capital Variable) — typically treated as a foreign partnership, triggering Form 8865 requirements for U.S. partners. Entity classification elections (Form 8832) may be available to change the U.S. tax treatment.
• Branches and disregarded entities — U.S. persons operating through a Mexican branch or a foreign disregarded entity file Form 8858.
• CUFIN tracking — for clients with SA de CV interests, Mexico’s CUFIN account (the tax-exempt earnings pool) is relevant to the U.S. treatment of dividends paid from previously-taxed earnings.
• Penalties for failure to file Forms 5471 or 8865 start at $10,000 per form per year, with potential reduction of foreign tax credits for extended non-compliance.

U.S.-Mexico Social Security Totalization

The U.S. and Mexico have a Totalization Agreement that coordinates social security contributions between the two countries. This is relevant for clients who worked in Mexico and accrued Mexican social security credits, and for those who continue to have self-employment income from Mexican sources:

• The agreement prevents paying social security taxes to both countries simultaneously
• Periods of coverage in both systems can be combined to qualify for benefits
• A Certificate of Coverage documents which country’s system applies
• Self-employed U.S. persons with Mexican-source income should confirm whether the totalization agreement applies to their situation

We coordinate the totalization analysis as part of Mexico-related engagements when relevant.

Mexican Bank Accounts and Financial Reporting

U.S. persons with Mexican bank accounts, brokerage accounts, or other financial accounts are subject to U.S. foreign account reporting regardless of where they live:

• FBAR (FinCEN 114): required if aggregate foreign account balances exceed $10,000 at any point during the year
• FATCA (Form 8938): required if foreign financial assets exceed applicable thresholds
• Mexican financial institutions report U.S. account holders to the IRS under FATCA intergovernmental agreements
• Penalties for non-compliance are significant, and willful failures carry criminal exposure

We prepare both forms as part of the annual compliance stack for clients with Mexican financial accounts.

AFORE — Mexican Pension Reporting for U.S. Residents

AFORE (Administradora de Fondos para el Retiro) is Mexico’s mandatory employer-funded pension system. For U.S. residents who accumulated AFORE balances while working in Mexico — including dual citizens and those who have since relocated to the U.S. — the U.S. tax treatment requires careful attention:

• AFORE accounts are not currently treated as tax-deferred under U.S. law in the same way as a U.S. qualified plan
• Contributions made by employers during Mexican employment may need to be reported depending on account type and applicable treaty provisions
• FBAR reporting applies to the account if it constitutes a foreign financial account
• The correct treatment of AFORE income and distributions continues to evolve and requires analysis on a facts-and-circumstances basis

We review AFORE treatment as part of Mexico-related engagements.

Pre-Immigration Planning for Mexican Nationals

Individuals and families moving from Mexico to the U.S. need to address their Mexican holdings before they become U.S. tax residents. Once U.S. residency begins — through a green card, visa, or the substantial presence test — worldwide income and foreign assets become reportable. Key steps before the move:

• Entity restructuring — SA de CV or S de RL de CV ownership becomes reportable from the first U.S. tax year. If the company is closely held, CFC rules may apply. Restructuring, distributing retained earnings, or liquidating entities before arrival can avoid ongoing Subpart F, GILTI, and Form 5471 complexity.
• Asset valuation — establishing the fair market value of Mexican real estate, business interests, and financial assets before arrival sets the correct U.S. cost basis going forward.
• AFORE review — understanding the U.S. treatment of existing AFORE balances before the move avoids surprises on the first U.S. return.
• PFIC analysis — Mexican investment funds and certain financial products may be classified as Passive Foreign Investment Companies under U.S. law, triggering complex annual reporting and punitive tax treatment on gains. Liquidating these before becoming a U.S. person avoids the problem.
• Bank account inventory — identifying all Mexican financial accounts and their balances before arrival ensures FBAR and FATCA compliance from day one.

Who This Is For

This page fits Mexican-American dual citizens living in the U.S., Mexican nationals who have relocated to the U.S. and retained business interests or financial accounts in Mexico, and individuals planning immigration from Mexico who want to understand the full compliance picture before arrival. It also covers those behind on Mexican entity reporting — Forms 5471, 8865, or 8858 — who need to address prior-year obligations.