Capital Gains When Selling Mexican Property

Most foreign owners of Mexican property first think seriously about capital gains tax when a buyer is already at the table. By then, the most valuable decisions have been made — years earlier, usually by whether receipts were kept. This article explains how the tax is calculated and collected, and which choices still change the outcome.

The notary collects the tax, not you

In a Mexican property sale, the notario público is a quasi-public official responsible for calculating, withholding and remitting the seller’s income tax at closing. The tax is effectively prepaid out of the sale proceeds before the seller receives them, and the new deed is recorded on that basis. This matters for planning: there is no later filing in which a foreign seller can straightforwardly re-argue the calculation, and recovering an overpayment afterwards is administratively difficult and slow.

Two calculation methods

Mexican law generally offers non-resident individuals two methods. The first applies a flat rate to the gross sale price with no deductions at all. The second applies a higher rate, on a sliding scale, but only to the net gain — the sale price less the inflation-adjusted acquisition cost and documented improvements. In most transactions with a well-documented cost basis, the net-gain method produces a substantially lower tax.

Which method applies is largely a documentation question. Claiming the net-gain method generally requires an RFC, often a Mexican tax representative, and valid facturas supporting every cost claimed. Notaries apply the rules conservatively: items that are not properly invoiced are excluded from the cost basis, and where records are incomplete the gross method becomes the practical default.

The primary residence exemption — and why it usually does not apply

Mexican law does provide an exemption on the sale of a primary residence, subject to conditions including a holding requirement and a limit on how frequently it can be claimed. The critical point for foreign owners is that it generally requires Mexican tax residency and registration with the tax authority. Having used the property personally, even for many years, does not qualify a non-resident. This is one of the areas where a residency determination made well in advance of a sale can change the economics materially — though it is a decision with consequences well beyond the transaction, since Mexican tax residents are taxed on worldwide income.

Everything is calculated in pesos

Mexican real estate transactions are recorded in pesos regardless of the currency in which the property was negotiated, purchased or sold. Where the peso has moved significantly between acquisition and sale, this can produce a peso-denominated gain that does not correspond to the seller’s economic result in dollars — or, occasionally, the reverse. Sellers who model their outcome purely in USD are frequently surprised at closing.

What to do before listing

• Locate and organize the facturas for your acquisition and for every improvement — this single step drives the difference between the two methods.
• Confirm whether you hold a valid RFC, and obtain one if you plan to sell within the coming year.
• Have your residency position determined, since it governs access to the exemption.
• Model the outcome in pesos, not only in your home currency.
• Confirm how Mexican tax paid will be credited on your home-country return, so the same gain is not taxed twice in economic terms.
• Raise the calculation with the notary early, rather than at signing, so any missing documentation can still be produced.

Conclusion

Capital gains on Mexican property is not an area where sophisticated planning produces most of the value. Ordinary record-keeping and a properly timed conversation do. The tax is collected at the closing table, and the leverage exists entirely before it.

FAQ

How is capital gains tax collected when I sell property in Mexico?

The notary calculates, withholds and remits it at closing, deducting it from your proceeds before you receive them.

Which calculation method will apply to me?

It depends on your documentation. With an RFC and valid facturas for your cost basis and improvements, the net-gain method is generally available; without them, the gross method typically applies by default.

Can I use the primary residence exemption as a foreigner?

Generally only if you are a Mexican tax resident with an RFC and meet the other statutory conditions. Non-residents typically do not qualify.

Do I pay tax again in the United States or Canada?

The gain is generally reportable at home, but foreign tax credits normally offset Mexican tax paid. The net result depends on your circumstances and should be reviewed with a cross-border advisor.

Do I need an RFC to sell?

It is not strictly required to complete a sale, but without one your options narrow considerably and the withholding is usually higher.

Speak with a bilingual advisor before you list. Tax Art reviews cost basis documentation, residency position and expected withholding for foreign sellers in Los Cabos and across Mexico, while the outcome can still be improved.