Not tax advice. Computation tools only. Have a professional review before filing.
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tax-calendar/mx/mx-annual-return-april-30
MXAll residentsSelf-employed

Annual ISR Return (RESICO and Individuals)

Mexico's annual personal income tax return for 2025. RESICO (Régimen Simplificado de Confianza) and regular individuals file together.

Filing deadline

April 30, 2026

Country
Mexico
Tax year
2025
Official
Tax authority

What is this deadline?

SAT annual return for individuals. RESICO taxpayers file a specific section for their simplified regime.

How to file

What people miss

  • RESICO — flat 1-2.5% depending on income bracket, simpler than general regime
  • CFDI invoicing discipline matters — missing CFDIs break deduction chains
  • IVA (VAT) monthly declarations separate from annual ISR

Prepare this return with open-source skills

These skills are in the OpenAccountants repo. Clone them into Claude, Cursor, or any AI agent and they handle the computation.

mexico-iva.mdMX

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.

This page is informational only and not tax advice. Verify dates and requirements against the official tax authority before filing.

All Mexico deadlinesGlobal calendar