US-Mexico Tax Treaty and Real Estate Capital Gains: What Buyers Must Know

The Convention Between the United States and Mexico for the Avoidance of Double Taxation, signed in 1992 and in force since 1994, governs how income (including capital gains) earned by residents of one country from sources in the other is taxed. For American buyers of Mexican real estate, the treaty is relevant—but it does not do what many buyers hope it does.

The treaty does not eliminate Mexican tax on the sale of your Baja California property. Both countries retain taxing rights on real estate gains under Article 13. What the treaty does provide—indirectly—is a framework under which the foreign tax credit mechanism of US law prevents true double taxation in most cases.

Article 13: Capital Gains from Real Property

Article 13 of the US-Mexico treaty governs gains from the "alienation of property." Paragraph 1 states that gains from the alienation of immovable property (real estate) situated in the other contracting state may be taxed in that state.

In plain terms:

• Mexico can tax the gain when an American sells Mexican property. ✓
• The US can also tax the same gain (US citizens are taxed on worldwide income). ✓

The treaty does not create an exemption; it merely confirms that both countries have taxing authority. The mechanism for avoiding double payment is not the treaty itself—it is the US foreign tax credit under Section 901 of the Internal Revenue Code, which is available to US taxpayers regardless of treaty provisions.

What the Foreign Tax Credit Actually Does

When you sell a Panorama by Viento condo and Mexico withholds ISR at closing, that withheld tax qualifies as a creditable foreign income tax on your US federal return (Form 1116). You claim a dollar-for-dollar credit against your US federal income tax liability, up to the amount of US tax attributable to the foreign-source income.

For most American sellers of Baja California property who entered at pre-sale pricing, the Mexican ISR—even calculated on Method 2 (net gain)—equals or exceeds the US long-term capital gains tax on the same gain. The credit fully offsets the US liability, resulting in zero additional US federal tax on the sale.

Unused foreign tax credits can be carried back one year and forward ten years under Section 904(c).

Tie-Breaker and Residency Provisions

Article 4 of the treaty contains tie-breaker rules for individuals who qualify as residents of both countries simultaneously. For Americans who have obtained Mexican Temporary or Permanent Residency and spend most of their time in Mexico, dual-residency status can complicate the picture:

• If you are a dual resident and the tie-breaker deems you a Mexico resident, your worldwide income may be taxed by Mexico as well as the US
• US citizens are always subject to US tax on worldwide income, regardless of where they are deemed resident under the treaty
• Mexico's rules for taxing worldwide income of Mexican residents apply if you are established as a Mexican fiscal resident

For most buyers who maintain their primary ties in the US and use their Baja California property as a vacation home or investment, dual-residency complications are unlikely. But buyers who relocate full-time should discuss their residency status with both a US and a Mexican tax professional before the year of the sale.

The Savings Clause: US Rights Are Preserved

Article 1, Paragraph 3 of the US-Mexico treaty contains a saving clause: the US retains the right to tax its citizens and residents as if the treaty had not come into effect, with certain exceptions. This means the treaty cannot reduce US tax below what the US domestic law imposes on US citizens.

For American real estate investors, the practical effect is that the treaty does not offer a "loophole" to avoid US capital gains tax on Mexico property. The US will tax the gain under domestic law, and the foreign tax credit is your relief mechanism.

Rental Income: A Different Treaty Article

While capital gains are covered under Article 13, rental income from Mexican property is covered under Article 6 (Income from Real Property) and Article 21 (Other Income). Rental income from a Mexican fideicomiso:

• Is taxable in Mexico (typically at 25% of gross for non-residents, or at graduated rates for registered Mexican residents)
• Is also taxable in the US on Schedule E
• May be offset by the foreign tax credit, but only to the extent of the US tax attributable to the foreign rental income

For buyers operating their Viento oceanfront residence as a short-term rental, understanding both the rental income and eventual capital gains tax picture requires modeling before you commit.

Estate and Gift Tax: The Treaty Does Not Cover These

The US-Mexico treaty is an income tax treaty. It does not address:

• US estate tax on Mexican property (the US estate taxes worldwide assets of US citizens; Mexico has no federal inheritance tax)
• Gift tax if you transfer Mexican property to family members
• Generation-skipping transfer tax

These remain governed entirely by US domestic law and, where applicable, Mexican state inheritance rules.

Practical Implications for Panorama by Viento Buyers

For the majority of American buyers at Km 104 Carretera Tijuana–Ensenada:

1. At sale, Mexico withholds ISR (25% gross or ~35% net gain)
2. The US taxes the same gain under domestic law
3. The foreign tax credit on Form 1116 offsets US tax with the ISR already paid
4. Net result: One layer of effective taxation, not two

The treaty confirms Mexico's right to collect first (via withholding). The foreign tax credit ensures you do not pay again in the US.

To discuss how this applies to a specific unit at Panorama by Viento—including projected ISR calculations and total return modeling—contact our team to arrange a private visit. We are located at Km 104 Carretera Tijuana–Ensenada, 90 minutes from San Diego, and are available via WhatsApp to connect you with our bilingual tax advisors before you make any decisions.