US-Mexico Tax Treaty: What Americans Abroad Need to Know

The US-Mexico tax treaty is designed to prevent double taxation and provide rules for resolving tax conflicts between the two countries. But the saving clause preserves the US right to tax its citizens, which means most Americans in Mexico still owe US tax on their worldwide income.

Key Treaty Provisions

The US-Mexico tax treaty covers:

• Income from employment — Taxed where the work is performed
• Dividends — Reduced withholding rates
• Interest — Reduced withholding rate
• Royalties — Reduced withholding rate
• Pensions — Generally taxed only in the country of residence
• Social Security — Taxed only by the paying country

The Saving Clause

The saving clause preserves the US right to tax its citizens and residents as if the treaty did not exist. This means you still file a US tax return and owe US tax on worldwide income even if you live in Mexico.

Residency Tie-Breaker Rules

If you are considered a tax resident of both the US and Mexico, the treaty provides tie-breaker rules:

1. Permanent home
2. Center of vital interests
3. Habitual abode
4. Nationality
5. Mutual agreement

Pensions & Retirement Income

Under the treaty, pensions are generally taxed only in the country of residence. For Americans in Mexico:

• US Social Security is generally taxable only in the US
• US pensions and IRAs are generally taxable only in the US
• Mexican pensions are taxable only in Mexico

Totalization Agreement

There is no U.S.-Mexico Social Security agreement in force. If you are self-employed in Mexico, the totalization agreement may exempt you from US self-employment tax.

What the Treaty Does NOT Do

• Does not exempt US citizens from US tax (saving clause)
• Does not eliminate FBAR or FATCA reporting
• Does not change your US filing obligations

Practical Implications for Americans in Mexico

The treaty's main practical benefit is reduced withholding on Mexican-source income and clear pension taxation rules. For most Americans in Mexico, FEIE and FTC remain the primary tools for reducing US tax.

When to Get Professional Help

You should consider professional help if you have questions about treaty benefits, pension taxation, or cross-border income.

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FileAbroad explains U.S. federal tax and U.S. international information-reporting consequences of documented foreign facts. It does not provide foreign-country legal or tax representation, valuation opinions, banking or remittance advice, or advice on what a foreign authority will accept.

Scope statement reviewed 2026-08-30 · FileAbroad product/content owner