On January 1, 2026, Mexico\u2019s new regulations on withholding taxes by digital platforms officially took effect. The most significant change isIncluding legal entities in the scope of coverage for the first time<\/strong>. Prior to this, the platform\u2019s withholding requirements primarily applied to individual sellers; following the implementation of the new regulations, sellers operating Mercado Libre stores as local Mexican companies are now also subject to the platform\u2019s withholding requirements.<\/p>\n For sellers, determining how much has been withheld depends on just one factor: whether it is linked to the platform's system.Valid RFC Tax ID Numbers<\/strong>. An RFC is not simply a matter of \u201dhaving one\u201d; tax ID numbers marked by SAT as expired, suspended, or with mismatched information are treated as nonexistent in the system.<\/p>\n At the same time, the platform\u2019s obligations are also increasing:<\/p>\n This means that tax payments are no longer a closed loop where \u201dsellers file their own returns and the platform is unaware,\u201d but ratherPlatform Data Connected Directly to the Tax Authority<\/strong>The<\/p>\n When you look at these three scenarios together, the differences are very clear:<\/p>\n In other words, a single RFC tax ID determines whether an order leaves you with 89.51 TP3T or only 641 TP3T. This isn\u2019t a matter of the size of the \u201dtax optimization window\u201d; rather, it\u2019sWill this business be viable?<\/strong>The issue. Based on the commission range circulating in industry media in Mexico (according to industry sources, approximately 8%\u201318%, approximately 14%\u201317% for Category 3C, subject to the platform\u2019s official rates), the cumulative effect of these fees means that the lack of RFC status virtually erodes the entire gross profit.<\/p>\n Even if a user already holds a valid RFC, the platform must still, in either of the following two situations, 100% IVA<\/strong> Automatic Deduction:<\/p>\n These two conditions are quite clear: the tax authorities want to see that \u201dsales, payment collection, and tax payment\u201d all take place within the same tax jurisdiction. Many Chinese sellers typically operate by having a local Mexican company accept orders while the payment is remitted back to accounts in China or Hong Kong; under the new regulations, the costs associated with this approach will rise sharply.<\/p>\n Therefore, the selection of payment channels must be addressed during the store\u2019s initial design phase, rather than waiting until the cash flow is running smoothly to make adjustments.<\/p>\n One thing needs to be made clear: platform-mediated deductions are merelyAdvance Payment<\/strong>...does not mean you are already in compliance. The taxpayer is still responsible for handling the difference after withholding, deductible input taxes, and monthly and annual tax filings.<\/p>\n In practice, we recommend proceeding in the following order:<\/p>\n Registering an RFC isn't difficult in itself; the challenge lies in the decisions you make before registering:<\/p>\n The problem for many sellers isn\u2019t that they \u201dcan\u2019t register,\u201d but rather that they lack the ability to file tax returns after registration, which results in a negative record with the SAT.<\/p>\n Qicaiying has an on-the-ground team in Mexico specializing in RFC registration and local tax filing, which can assist with applying for tax ID numbers, registering business addresses and business activities, filing monthly IVA\/ISR returns, and verifying and archiving withheld CFDI documents. Specific solutions will be evaluated on a case-by-case basis depending on the seller\u2019s corporate structure and payment receipt channels.<\/p>","protected":false},"excerpt":{"rendered":" Effective January 1, 2026, Mexico\u2019s new withholding tax regulations for digital platforms will, for the first time, extend coverage to legal entities. As a result, the tax burden for sellers on Mercado Libre Mexico will be divided into two tiers based on their RFC tax ID number: Legal entities with a valid RFC are subject to a withholding rate of 50% for VAT plus 2.5% for income tax (ISR), totaling approximately 10.5%; Legal entities without an RFC or with an expired RFC will have 100% in VAT and 20% in ISR withheld, totaling approximately 36%. Cross-border sellers also face two high-risk scenarios\u2014payment accounts and goods flow\u2014that result in a tax rate increase to 1,001 TP3T IVA. Additionally, the platform must provide real-time transaction data to SAT and issue CFDI forms for withheld taxes. This article breaks down the details of these rules and outlines five actionable steps.<\/p>","protected":false},"author":10,"featured_media":17537,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,17,18,127],"tags":[2015,2016,1475,1412,1301],"class_list":["post-17538","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","category-allguide","category-recomguide","category-mexican-meikeduo","tag-2015","tag-ivaisr","tag-1475","tag-rfc","tag-1301"],"yoast_head":"\n\n
With RFC vs. Without RFC: A 25.5-percentage-point Gap<\/h2>\n
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The Two Most Common Pitfalls for Cross-Border Sellers<\/h2>\n
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Withholding does not mean the tax has been paid<\/h2>\n
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Three Prerequisites for Registering an RFC<\/h2>\n
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