Mexico tax deadlines 2026.

Use this skill whenever asked to prepare, review, or classify transactions for a Mexico IVA (Impuesto al Valor Agregado) return or classify transactions for Mexican VAT purposes. Trigger on phrases like "prepare IVA return", "Mexican VAT", "declaracion de IVA", "CFDI classification", "SAT filing", or any request involving Mexico value-added tax. Also trigger when classifying transactions from CFDI XML files, bank statements, or invoices for Mexican IVA purposes. This skill contains the complete Mexico IVA classification rules, CFDI 4.0 requirements, rate determination (16%/0%/exempt), border zone treatment, withholding rules, deductibility rules, and filing deadlines required to produce a correct return. ALWAYS read this skill before touching any Mexico IVA-related work.

Use this skill whenever asked about Mexico transfer pricing rules, documentation requirements, or precios de transferencia compliance. Trigger on phrases like "transfer pricing Mexico", "Mexican TP documentation", "precios de transferencia Mexico", "master file Mexico", "local file Mexico", "CbCR Mexico", "APA Mexico", "SAT transfer pricing", "maquiladora safe harbor", "Article 76 LISR", or any question about intercompany pricing for Mexican entities.

Use this skill whenever asked about Mexican IMSS social security for self-employed individuals. Trigger on phrases like "IMSS", "seguro social Mexico", "regimen voluntario", "incorporacion voluntaria", "IMSS freelancer", "aseguramiento voluntario", "Modalidad 40", or any question about voluntary IMSS enrollment, contribution calculation, or benefits for self-employed persons in Mexico. Covers voluntary inscription (Modalidad 40, regimen voluntario), contribution bases, health/maternity/retirement/disability benefits, and tax deductibility. ALWAYS read this skill before touching any Mexican IMSS work.

Mexican VAT return (IVA -- Impuesto al Valor Agregado, Declaracion Mensual) for self-employed individuals. Covers the standard 16% rate, zero rate (tasa 0%), exempt activities, monthly filing via SAT portal, DIOT informative declaration, CFDI electronic invoicing, and IVA acreditable computation. Primary source: Ley del IVA (LIVA).

Use this skill whenever asked about Mexican CFDI electronic invoicing. Trigger on phrases like "CFDI", "factura electronica", "PAC", "complemento de pago", "comprobante fiscal", "SAT factura", "CFDI 4.0", "timbrado", "cancelacion CFDI", or any question about issuing, receiving, or managing electronic invoices in Mexico. Covers CFDI 4.0 structure, PAC certification, complemento de pago, uso de CFDI, cancellation rules, and SAT obligations. ALWAYS read this skill before touching any Mexican CFDI work.

Use this skill when onboarding a Mexican persona física con actividad empresarial or RESICO freelancer. Trigger on phrases like "Mexico freelance", "SAT registration", "persona física", "actividad empresarial", "RESICO", "régimen fiscal México", "RFC", "CFDI", "ISR provisional", "declaración anual México", or any initial client conversation involving a Mexican self-employed individual. This skill collects essential information to determine the correct tax régimen, validates SAT compliance, and routes to the appropriate computation skill. ALWAYS read this skill before beginning any Mexican freelance intake.

Use this skill whenever asked about Mexico cryptocurrency or virtual asset taxation. Trigger on phrases like "crypto tax Mexico", "Bitcoin Mexico", "impuesto criptomonedas", "ISR crypto", "SAT crypto", "activos virtuales Mexico", "Bitso tax", "staking Mexico", "mining income Mexico", "NFT tax Mexico", "Ley Fintech crypto", "declaración anual crypto", "CFDI crypto", or any question about the income tax, ISR, or IVA treatment of cryptocurrency, tokens, or digital assets for Mexican tax residents or Mexico-source crypto income. Covers SAT treatment of virtual assets, ISR rates, cost basis, CARF reporting, and Ley Fintech classification. ALWAYS read this skill before touching any Mexico crypto work.

Use this skill whenever asked about Mexican individual income tax (ISR) for self-employed individuals (personas físicas con actividades empresariales y profesionales). Trigger on phrases like "how much tax do I pay in Mexico", "ISR", "Declaración Anual", "pagos provisionales", "actividades profesionales", "honorarios", "RESICO", "deducciones personales", "deducciones autorizadas", "retenciones", "RFC", "income tax return Mexico", "SAT", "CFDI honorarios", "comprobante fiscal", or any question about filing or computing income tax for a self-employed or freelance client in Mexico. This skill covers the Declaración Anual PF (Personas Físicas), pagos provisionales (monthly estimated payments), progressive ISR brackets, deducciones autorizadas and personales, retenciones on professional CFDI, and the RESICO regime. ALWAYS read this skill before touching any Mexican income tax work.