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Estate planning for cross-border families: what Texans with Mexican ties should know

On Behalf of | Jan 9, 2026 | Firm News |

Many families in Texas maintain deep roots in Mexico. You might own a rancho in Michoacán or have family living in Monterrey. Managing assets across the border comes with unique legal considerations. Without a clear plan, your loved ones could face high taxes and long court delays. Understanding the rules in both the United States and Mexico is the first step toward a secure legacy.

Navigating tax laws and treaties

The U.S. and Mexico have different ways of taxing wealth. The U.S. taxes its citizens on their worldwide assets. Meanwhile, Mexico primarily taxes income and property transfers within its borders. Fortunately, a tax treaty exists between the two nations to help prevent double taxation. Keep these specific tax issues in mind as you plan:
  • Treaty benefits: You can often claim credits for taxes paid in one country to offset liabilities in the other
  • Estate tax gaps: Mexico does not have a federal estate tax, but the U.S. does for large estates
  • Asset reporting: You must report foreign bank accounts and property to the IRS to avoid heavy fines
These tax strategies work best when you coordinate them with your legal documents. Because each country uses a different legal framework, you must bridge the gap between two distinct systems.

Bridging the legal divide

Texas follows common law, but Mexico uses a civil law system. This difference affects how courts view your instructions. For instance, Mexico has “forced heirship” rules that might require you to leave parts of your estate to specific family members. A standard Texas will might not be enough to handle your Mexican property. Use the following legal tools to stay in compliance:
  • Dual wills: Consider having a separate will for each country to speed up the probate process
  • Mexican trusts: Use a fideicomiso to hold coastal or border property in Mexico safely
  • U.S. trusts: A trust in Texas can help protect your American assets from public probate court
Using these legal tools allows you to move assets more freely. It also helps you manage more complex holdings that often come with high-value estates.

Protecting high-value assets

High-net-worth individuals often face more scrutiny. Safeguarding a luxury home or a family business requires precise structures. You should ensure that your powers of attorney are valid in both jurisdictions. This allows a trusted person to manage your affairs if you become unable to do so.
Planning early helps your heirs receive their inheritance without stress. It keeps your private matters out of the public eye. Most importantly, it ensures your wishes are followed on both sides of the Rio Grande.

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