Mexico's tax authority has unveiled new tariffs targeting goods from Asian countries, a move that could significantly impact popular online retailers Shein and Temu, as the country strengthens its surveillance of international ecommerce.

The measures, announced by Mexico's tax authority SAT on Tuesday, will impose a 19 per cent duty on goods entering Mexico via courier companies from countries that lack international treaties with Mexico, including China, where both Shein and Temu are headquartered.

For shipments from Canada and the United States, which are part of the United States-Mexico-Canada trade agreement, a 17 per cent duty will apply to goods valued between $50 and $117.

The tax authority stated the new tariffs will strengthen the "fight against abusive practices," marking a significant shift from previous policies where duties were not required on goods of these values.

These changes, effective from 1 January, follow a broader decree issued on 19 December by president Claudia Sheinbaum's administration that increased import duties to as much as 35 per cent on various consumer goods, including clothing, home textiles, and outdoor equipment.

The timing of these measures is particularly significant, coming just weeks before the inauguration of US president-elect Donald Trump, who has proposed implementing a 25 per cent tariff on imports from both Canada and Mexico.

Industry experts suggest these new regulations could substantially impact Mexico's IMMEX programme, which has traditionally allowed foreign companies to import goods tax-free for manufacturing and assembly purposes, particularly when selling directly to US consumers.

The move represents a significant shift in Mexico's trade policy, with government officials earlier this month stating that the measures aim to prevent tax evasion, ensure fair competition for Mexican companies, and protect domestic jobs in the sector.

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