US Taxes on Mexican Land: What to Report, What to Ignore

Ask a US buyer about US taxes on Mexican property and the conversation turns quickly to forms with forbidding numbers: 114, 8938, 5471, 3520. Almost all of them are irrelevant to someone who simply bought a lot. The ones that do apply are ordinary, and none of them is a reason to hesitate.

Here is the whole shape of it. Buying land in Mexico is not a US taxable event, and there is no annual US tax on foreign land. The IRS cares at a few specific moments — when money sits in a foreign bank account, when the property earns rent, when you sell at a gain, and when you die with a very large estate. Everything else is fear of forms that do not apply.

The short version

US taxes on Mexican land: the short version

The whole obligation fits in four sentences. First, if your foreign financial accounts — most likely a Mexican bank account — total more than US$10,000 at any point in the calendar year, you file an FBAR. Second, if you rent the property out, the net income goes on your US return, in dollars, with a credit for the Mexican tax already paid. Third, when you sell, the gain is reported to the IRS even though Mexico taxes the sale first. Fourth, if your estate is large enough — well over US$10 million in 2026, confirm the current number — the estate tax can reach Mexican land.

Notice what is missing: no form for the purchase, no annual tax on the land itself, no reporting of the escritura to Washington. The lot sits in your name, pays its predial to the Mexican municipio, and the IRS never hears about it until one of the four moments above arrives.

The IRS does not tax land. It taxes income, gains, and very large estates — and a vacant lot on the Oaxaca coast produces none of the first two.

At the purchase

Buying a lot: nothing to file

When you sign the promesa de compraventa, appear before the notario, and walk out with your escritura — the deed — nothing gets reported to the US government. You are spending after-tax dollars on an asset, and the IRS is not at the closing. There is no "foreign real estate purchase" line on any US form.

What the closing does produce is your cost basis. The Mexican costs of buying — the ISAI acquisition tax, the notario's fees, the registry — add to what you paid; none of it is deductible. Keep the escritura, the closing statement, the receipts. If you paid in pesos, the exchange rate on the day you paid matters, and keeping track of your dollar cost basis starts at the closing, not at the sale.

One structure worth naming. If your lot sits inside the restricted zone — within 50 kilometres of the coast, which covers most of what we sell — the title runs through a fideicomiso, a bank trust. For US tax purposes, buyers are generally treated as the owners of the property behind the trust, and for a typical buyer it creates no annual US filing of its own. If an adviser tells you otherwise, ask a CPA who handles expat files.

FBAR

FBAR: the form that actually bites

The one form that earns its reputation is the FBAR — FinCEN Form 114, filed not with the IRS but with the Financial Crimes Enforcement Network. It applies when the aggregate value of your foreign financial accounts exceeds US$10,000 at any point in the calendar year. Read those words closely: aggregate, at any point. Two accounts of US$6,000 each trigger it, and a balance over US$10,000 for a single day triggers it. The land itself never appears on the form — FBAR is about accounts, and a lot is not an account.

What counts is a foreign financial account, and the Mexican bank account is first among equals. If you opened one to pay the predial, receive rent, or hold the deposit for your build, it is exactly what FBAR watches for. The practical side — whether a tourist can open one and what documents you need — is in our guide to opening a Mexican bank account as a foreigner.

Three things to know about filing. FBAR is a report, not a tax: nothing is owed on the balance, however large. It is filed separately from your 1040, with an automatic extension into October. And the penalties are why the form bites — civil fines for careless non-filing are bad enough, and willful non-filing is a different category entirely. If you have held an account for years without filing, the fix is to file late; it costs far less than waiting to be asked.

FATCA

Form 8938: higher thresholds, fewer filers

Form 8938, born of FATCA, covers ground similar to the FBAR, but it is filed with your 1040 and it reaches "specified foreign financial assets" rather than just accounts. The thresholds depend on where you live and how you file: a single filer living abroad crosses the line at a lower balance than a married couple filing jointly at home, and the numbers start as low as US$50,000. Confirm yours rather than guessing.

In practice, fewer buyers are caught by 8938 than by FBAR. The thresholds sit higher for most people, and the form counts assets rather than accounts — it can reach foreign securities that FBAR ignores. For the land buyer the shape is the same: watch the Mexican bank account; the lot itself is not a specified foreign financial asset.

Here are all the forms this guide mentions, and when each one might cross your desk.

Form	When it applies	Threshold	Notes
FinCEN 114 (FBAR)	You hold foreign financial accounts	Aggregate value over US$10,000 at any point in the year	Filed separately with FinCEN, not with your 1040. A report, not a tax.
Form 8938	You hold specified foreign financial assets	Depends on where you live and how you file; as low as US$50,000	Filed with your 1040. The land itself is not a specified asset.
Schedule E	You rent out the property	Any year with rental activity	Net income reported in US dollars; predial, maintenance and management offset it.
Form 1040 (Schedule D)	You sell the land at a gain	Any gain over your dollar cost basis	Mexico taxes the sale first; the foreign tax credit stops the double tax.
Forms 709 / 706	Gifts of the property; estates at death	Gift: the annual per-recipient exclusion. Estate: an exemption well over US$10 million — confirm the current number	Only the largest estates pay. Most buyers never file either form.

Rental income

Renting it out: report the net, in dollars

Renting changes the picture from owning an asset to running a small business with a beach view. The income goes on Schedule E of your US return, reported in US dollars, and you report the net — rent received minus the expenses of producing it. Predial, the property manager, maintenance, utilities while guests are in: these offset the income the way they would for a cabin in Colorado.

The tax you pay in Mexico does not disappear — it becomes a credit. Renting in Mexico means ISR, the impuesto sobre la renta, Mexico's income tax, withheld by a platform or paid to the SAT, the Mexican tax authority, when you file. On your US return you claim it as a foreign tax credit, so the same income is not taxed twice. Your contador in Mexico and your US CPA each see half of the picture; the credit joins the halves.

Two small notes. Convert everything to dollars at the exchange rate on the day it happened, and keep receipts in both currencies. And if you rent for only a week or two a year, special rules may let you leave the income off entirely — ask a professional before building a Schedule E around a fortnight of guests.

The sale

Selling: capital gains and the foreign tax credit

Selling is where the US system shows up in person. The sale of your Mexican lot is a capital-gain event for the IRS, full stop — the fact that the land sits in another country changes nothing, because you are a US person and the gain is yours. Report it on Schedule D in the year of the sale. Hold the lot for more than a year and the gain is long-term, at the preferential rates; sell sooner and it is short-term, taxed as ordinary income.

Mexico taxes the sale first, at the notario's office, and the ISR withheld there — Mexico's own capital-gains tax at the exit, which we walk through in our guide to selling land in Oaxaca — becomes a foreign tax credit on your US return. In most cases the credit absorbs the US bill, because the Mexican rate on the gain is not shy. What the IRS wants is the reporting: sale price converted to dollars on the day of sale, minus your basis — the dollar cost you have been tracking since the escritura — and the difference is the gain.

One honest warning. Sellers sometimes discover their basis paperwork is thin, and a thin basis means a fat gain on paper. This is the moment the folder from the closing pays for itself.

Death and taxes

Estate tax: a rich person's problem

US estate tax follows US citizens and residents around the world, so Mexican land is in reach — in theory. In practice the exemption is enormous: well over US$10 million in 2026, and confirm the current number, because it moves with the law. Below that line, an estate pays nothing and files nothing. For nearly every buyer of a coastal lot, this is a footnote, not a filing.

Two adjacent points, briefly. Gifting the land while you are alive is a gift for US purposes, and gifts above the annual per-recipient exclusion are reported on Form 709 — the exclusion changes, so confirm the number then. And when the owner dies, Mexico runs its own succession through the notario, separate from any US estate question. The two countries do not share a single probate, and your heirs will want professionals on both sides of the border.

What to ignore

What to ignore, with confidence

Now the list that saves the most worry. You file nothing when you buy, and nothing each year just for holding the land — the predial bill is a Mexican matter, paid to the municipio in pesos, and it is small. The IRS has no annual tax on foreign land and no form asking about it. Holding a lot is, from Washington's point of view, an event that never happened.

You generally cannot deduct the interest on a Mexican mortgage taken to buy the lot. The rules are narrow, they usually stop at the border for a foreign lot, and for most buyers the standard deduction swallows the question anyway. If a lender or a neighbour tells you the interest is deductible, treat it as a claim to verify with a CPA, not a line to assume.

Ignore the forms that belong to other people's situations: the 5471 family if you did not buy through a Mexican corporation, the 3520 if no one made you a large foreign gift, the 8621 if no foreign fund is involved. And ignore the dread that Washington will find out about the land. There is nothing to find — until one of the four moments arrives.

One last thing, said plainly. This is information, not tax advice, and the rules change; the numbers here are the honest ones as of writing, with the places to confirm flagged along the way. Your situation is specific, and the US-Mexico tax conversation has edges this page did not touch. A CPA who handles expat filings is worth the fee — we would rather you pay an accountant than trust a real-estate website with your return.