Buying a Property Below Market Value in Mexico: When a Bargain Can Create an Extra Tax

Finding a property at a great price can feel like the perfect real estate opportunity. But in Mexico, buying a property significantly below its appraised value can have unexpected tax consequences.

This is something buyers — especially foreigners unfamiliar with the Mexican tax system — should understand before signing a purchase agreement or paying a deposit.

When is a property considered “too cheap”?

Mexican tax law establishes an important rule.

If the official appraisal value of a property is more than 10% higher than the purchase price, the difference may be considered income for the buyer for Mexican income tax purposes.

This rule comes from Article 125 of Mexico’s Income Tax Law (Ley del Impuesto sobre la Renta).

In other words, the tax authority may consider that the buyer received an economic benefit by purchasing the property substantially below its appraised value.

An example

Imagine you find a house in Querétaro and negotiate the following:

Purchase price: $2,500,000 MXN

Appraised value: $3,000,000 MXN

The difference is:

$500,000 MXN

Since the appraisal is 20% higher than the purchase price — exceeding the 10% threshold established by law — this difference can be treated as income for the buyer.

The applicable provisional income tax payment is generally 20% of the difference between the appraisal value and the purchase price. The regulation specifically instructs the notary or other authorized official handling the transaction to calculate this payment when the conditions are met.

In our example:

$500,000 difference × 20% = $100,000 MXN

So that amazing $2.5 million deal may come with an additional $100,000 MXN provisional ISR payment for the buyer.

And this is important: it is not 20% of the entire purchase price. It is 20% of the difference between the qualifying appraisal value and the agreed purchase price.

And what happens in Querétaro?

There is another tax to consider.

When purchasing real estate in Querétaro, the buyer also pays the local Impuesto sobre Traslado de Dominio (Property Transfer Tax).

For this tax, the taxable base is generally the higher amount between the purchase price and the commercial value determined by the applicable appraisal.

This means that simply writing a lower price into the purchase agreement does not necessarily reduce your acquisition taxes.

For example, if you buy a property for $2.5 million but its recognized commercial value is $3 million, the local acquisition tax may be calculated using the higher value rather than the $2.5 million purchase price.

This is why I always recommend talking to the notary first

In Mexico, the notary plays a fundamental role in a real estate transaction. Before closing, the notary reviews the documentation and calculates the taxes associated with the purchase.

When there is a significant difference between the negotiated price and the property’s appraisal or relevant tax value, I always recommend asking the notary for a preliminary tax calculation before committing to the transaction.

Sometimes negotiating an extremely low purchase price looks very attractive on paper, but once taxes and closing costs are calculated, the savings may be smaller than expected.

My advice when buying property in Mexico

Before paying a deposit or signing a purchase agreement, ask your real estate advisor and notary to review:

* the agreed purchase price;

* the property’s appraisal and applicable tax values;

* the estimated Property Transfer Tax;

* whether the difference could generate ISR for acquisition of property;

* and the total estimated closing costs.

A good real estate deal isn’t simply about negotiating the lowest possible price.

It’s about knowing what the property will actually cost you once taxes, notary fees and closing expenses are included.

This information is provided as a general guide. Every real estate transaction is different, and taxes should always be calculated and confirmed by the notary handling the transaction.

Pavla de la Parra

RE/MAX Capital | Relocation & Real Estate in Querétaro