INPC (Índice Nacional de Precios al Consumidor) (National Consumer Price Index)EEN-pay-say
INPC (Índice Nacional de Precios al Consumidor) is Mexico's official consumer price index published by INEGI that measures the average change in prices of a basket of goods and services representative of household consumption. In real estate transactions, ISR Law Article 124 requires the INPC to adjust the acquisition cost basis when calculating capital gains tax, often substantially reducing taxable gains on long-held property.
By Daniel Ortega · Last reviewed 12 November 2026
How it works
When a property owner sells real estate in Mexico, the notary uses the INPC to inflate the original purchase price from the month of acquisition to the month before the sale, which reduces the taxable capital gain. Article 124 of the ISR Law requires the cost basis be restated by multiplying by the INPC quotient (INPC of sale month divided by INPC of acquisition month). The INPC for October 2026 is 147.026 points, based on the second 2 weeks of July 2018 = 100. For example, a property bought in January 2020 for 3,000,000 pesos (INPC 105.206) and sold in October 2026 (INPC 147.026) has an inflation-adjusted cost basis of 4,192,710 pesos (3,000,000 × 147.026 ÷ 105.206), cutting the taxable gain by nearly 1.2 million pesos. Improvement costs are also inflation-adjusted using the INPC from the date the improvement was completed. INEGI publishes the INPC biweekly and monthly, with each monthly value published around the second week of the following month.