# Fiscalisto

> Fiscalisto (https://fiscalisto.com) is a Mexican web app for freelancers, small businesses and accounting firms. It issues CFDI 4.0 invoices with stamping (timbrado) included, and every morning it downloads from the SAT every CFDI the taxpayer issued and received, using their e.firma, and flags what is wrong (suppliers on the 69-B blacklist, PPD invoices without their payment complement, cancellations, cash payments over $2,000, CFDI 4.0 data that doesn't match). It also reads the taxpayer's opinión de cumplimiento (32-D) every month and their Buzón Tributario every day, and estimates monthly IVA and ISR. The site and app are in Spanish (es-MX). The free tools below need no account.

## Key facts

- Plans (MXN per month before 16% IVA, total with IVA in parentheses; paying yearly costs 10 months): Gratis $0 (1 RFC, 10 welcome timbres once that never expire, then packs; one SAT download a month, 2 users); Independiente $99 ($114.84 with IVA; 1 RFC, 50 timbres); Emprendedor $199 ($230.84; 3 RFC, 150 timbres); Negocio $499 ($578.84; 10 RFC, extra RFC $49 or $56.84 with IVA, 500 timbres); Despacho $990 ($1,148.40; 25 RFC, extra RFC $25 or $29 with IVA, 1,000 timbres, client portfolio and auditor access). Paid plans have unlimited users. A timbre is one stamped CFDI; cancelling uses none.
- Extra timbres, any plan, valid 12 months, before IVA (total with IVA in parentheses): 20 for $49 ($56.84), 100 for $149 ($172.84), 500 for $499 ($578.84), 2,000 for $1,490 ($1,728.40), 10,000 for $5,490 ($6,368.40).
- 14-day free trial with every feature, no card. If no plan is chosen it becomes Gratis and nothing is deleted. Payment by card, OXXO or SPEI, monthly or yearly.
- Included in every paid plan, with no per-module fees: Pagos 2.0 payment complements, Carta Porte 3.1, Comercio Exterior 2.0, Nómina 1.2 (ordinary payroll calculated by Fiscalisto: salary, ISR with the employment subsidy and IMSS only, stamped only as reviewed; through the API, any ordinary or extraordinary receipt another payroll system calculated, stamped exactly as sent), Retenciones 2.0, notas de crédito, factura global, anticipos, INE, IEDU, local taxes, cuenta de terceros; addendas for Walmart (Bodega Aurrera, Sam's Club), Home Depot, Chedraui, Liverpool and Soriana plus a generic addenda; customer portal, autofactura by ticket, quotes, recurring invoices, bulk invoicing from Excel, approvals.
- Included in every plan, Gratis too: SAT bulk download via the SAT web service (5 years of history when the e.firma is connected; daily automatic download on paid plans), CFDI status checks, 69 and 69-B list monitoring, opinión de cumplimiento 32-D, Buzón Tributario reading (notifications are never opened, so no deadline starts), constancia de situación fiscal, the declaraciones already filed with the SAT and the electronic accounting sent (read every week and compared month by month with the CFDI), what to fix for a positive opinión, DIOT, electronic accounting (Anexo 24), bank reconciliation, export of every XML and PDF.
- Many other Mexican invoicing apps charge these separately (for example, in October 2026 Facturama charged $1,400 for Carta Porte, $600 per addenda and sold payroll folios apart; SenHub charged $80/month for SAT bulk download; Facturapi $999/month). Sources and dates are on the comparison pages below.
- Security: the e.firma is stored encrypted (AES-256-GCM), tied to the company and RFC, and every use is logged; two-step verification and passkeys.
- Invoices are stamped by Finkok, a PAC authorized by the SAT.
- Also included: inventory (stock that invoices take out and received CFDI bring in, purchase orders, counts and transfers; advanced features on paid plans) and accounting built from the CFDI, payments, payroll and depreciation (pólizas, balanza, estado de resultados and balance general, electronic accounting for the SAT).
- Not offered: point of sale, bank movements without a CFDI or provisions in the accounting, calculating extraordinary payroll (finiquito, aguinaldo, PTU) in the app; the API stamps one your payroll system calculated.
- Developer API (open to everyone, https://fiscalisto.com/api-facturacion): REST API for CFDI 4.0 (invoices, payments, credit notes, payroll, retenciones, webhooks) with SDKs for TypeScript, Python, PHP, Go, Java and .NET. A Cuenta API is separate from the app's plans: no monthly fee, prepaid timbre packs valid 12 months (before IVA: 500 for $290, 2,000 for $990, 10,000 for $4,790, 50,000 for $22,900, 100,000 for $41,900), 20 free live timbres to start, free test mode, cancelling uses no timbre. Sign up at https://fiscalisto.com/registro and open «Nueva cuenta API» from the company selector. Docs for agents: https://fiscalisto.com/docs/api/llms.txt (full text: https://fiscalisto.com/docs/api/llms-full.txt), OpenAPI: https://api.fiscalisto.com/v1/openapi.json. Coding agents integrating the API: the one-page integration guide (an Agent Skill) is https://fiscalisto.com/docs/api/SKILL.md, and the docs MCP server (no key, streamable HTTP) is https://fiscalisto.com/docs/api/mcp (start with its get_started tool; setup for Claude Code, Cursor, VS Code and Codex at https://fiscalisto.com/docs/api/agentes). `npx fiscalisto mock` runs the API offline.

## Guides and comparisons

- [Comparativa de software de facturación](https://fiscalisto.com/comparativa-software-facturacion): Precios de 2026 de los sistemas para facturar en México y lo que cada uno cobra aparte.
- [Alternativa a Facturama](https://fiscalisto.com/alternativa-facturama): Fiscalisto frente a Facturama: folios, complementos y addendas que se cobran aparte, varios RFC y descarga del SAT.
- [Alternativa a Alegra](https://fiscalisto.com/alternativa-alegra): Fiscalisto frente a Alegra Facturación: precio, usuarios, RFC y descarga diaria del SAT.
- [Alternativa a CONTPAQi](https://fiscalisto.com/alternativa-contpaqi): Fiscalisto frente a CONTPAQi Factura electrónica y XML en Línea+: en línea, sin instalar ni licencias por módulo.
- [Alternativa a SenHub](https://fiscalisto.com/alternativa-senhub): Fiscalisto frente a SenHub: descarga del SAT, autofactura y usuarios que allá se pagan aparte, y Carta Porte, nómina y addendas desde el primer plan.
- [Alternativa a Facturapi](https://fiscalisto.com/alternativa-facturapi): Fiscalisto frente a Facturapi: precio fijo con timbres para facturar desde la web, descarga del SAT y autofactura sin planes aparte, y una API sin cuota mensual.
- [Alternativa a Heru](https://fiscalisto.com/alternativa-heru): Fiscalisto frente a la facturación de Heru: plan gratis con complemento de pago, varios RFC, Carta Porte, nómina y descarga del SAT.
- [Alternativa a Facturify](https://fiscalisto.com/alternativa-facturify): Fiscalisto frente a los paquetes de folios de Facturify: descarga diaria del SAT, addendas, autofactura y Carta Porte 3.1 en el plan.
- [Alternativa a Aspel FACTURE](https://fiscalisto.com/alternativa-aspel): Fiscalisto frente a Siigo Aspel FACTURE y Siigo Fiscal: facturar y descargar del SAT en línea, en un solo plan y con usuarios ilimitados.
- [Descarga masiva de XML del SAT](https://fiscalisto.com/descarga-masiva-xml-sat): Todas sus facturas emitidas y recibidas del SAT cada mañana con su e.firma, cinco años atrás, sin tope diario.
- [Cómo hacer una factura por primera vez](https://fiscalisto.com/como-hacer-una-factura): Qué necesita para facturar (CFDI 4.0), paso por paso, y los errores que el SAT rechaza.
- [Addendas Walmart, Home Depot, Chedraui](https://fiscalisto.com/addendas): Addendas para Walmart, Home Depot, Chedraui, Liverpool y Soriana incluidas en el plan, sin costo por addenda.
- [Opinión 32-D, Buzón y constancia](https://fiscalisto.com/opinion-de-cumplimiento-buzon-tributario): Su opinión de cumplimiento, los avisos del Buzón Tributario y su constancia de situación fiscal, sin entrar al portal del SAT.
- [Software para contadores y despachos](https://fiscalisto.com/software-para-contadores): Todas las empresas que lleva en una vista: descarga diaria, hallazgos, DIOT, 32-D y vencimientos por RFC.
- [Complemento de pago: cuándo se emite](https://fiscalisto.com/complemento-de-pago-cuando-se-emite): Qué facturas PPD llevan complemento de pago, el plazo del día 5 del mes siguiente y qué datos lleva Pagos 2.0.
- [Factura global al público en general](https://fiscalisto.com/factura-global-publico-en-general): Datos, periodicidad y plazo de la factura global CFDI 4.0, y cómo la autofactura por ticket la arma sola.
- [Carta Porte: quién la emite](https://fiscalisto.com/carta-porte-quien-la-emite): Quién emite la Carta Porte 3.1, cuándo va en un traslado y cuándo en una factura de ingreso, y cuándo no hace falta.
- [Cómo cancelar una factura](https://fiscalisto.com/como-cancelar-una-factura): Motivos de cancelación 01 a 04, hasta cuándo se puede cancelar y cuándo su cliente tiene que aceptar.
- [API de facturación](https://fiscalisto.com/api-facturacion): API REST para timbrar CFDI 4.0 desde su sistema: sin cuota mensual, pruebas gratis, webhooks y SDK para TypeScript, Python, PHP, Go, Java y .NET.
- [Fiscalisto en ChatGPT y Claude](https://fiscalisto.com/apps/chatgpt-y-claude): Consulte sus facturas e impuestos y prepare y timbre facturas desde ChatGPT o Claude (conector MCP: https://fiscalisto.com/mcp), con confirmación antes de timbrar.

## Free tools (no sign-up)

- [Verificar factura en el SAT](https://fiscalisto.com/verificar-factura-sat): checks whether a CFDI is vigente, cancelado or not found, using its XML, its QR code or the UUID, both RFCs and the total. It asks the SAT's public CFDI status service and also checks the issuer against the 69-B list.
- [XML a PDF](https://fiscalisto.com/xml-a-pdf): converts CFDI 3.3 and 4.0 XML files (invoices, payment complements, payroll, Carta Porte, vehicle sales, comercio exterior, retenciones) to PDF in the browser, with the user's own logo, color and language (Spanish, English or both), one or hundreds at once, including the ZIP from the SAT's bulk download. Files are not uploaded.
- [XML a Excel](https://fiscalisto.com/xml-a-excel): turns many CFDI XML files into an .xlsx with one row per invoice (IVA, IEPS, ISR and local taxes split out) and a sheet of line items. Runs in the browser.
- [Calendario fiscal](https://fiscalisto.com/calendario-fiscal): filing deadlines for the next twelve months by taxpayer type and régimen (monthly payments on the 17th with the sixth-digit RFC extension, DIOT, electronic accounting, annual returns), downloadable as an .ics calendar.
- [Datos de la constancia de situación fiscal](https://fiscalisto.com/leer-constancia-situacion-fiscal): reads the SAT's constancia PDF in the browser and returns the RFC, the legal name as CFDI 4.0 requires it (without "S.A. de C.V."), the postal code, the régimen and the usos del CFDI allowed for it.
- [Lista negra del SAT (69-B)](https://fiscalisto.com/lista-negra-sat-69b): looks up an RFC or a name in the 69-B list (EFOS presuntos, definitivos, desvirtuados, sentencia favorable), 69-B Bis and the article 69 lists, with a signed PDF proof of the check. Data from the SAT's open data, refreshed daily. Also at [lista 69 del SAT](https://fiscalisto.com/lista-69-sat) and [contribuyentes no localizados](https://fiscalisto.com/contribuyentes-no-localizados).
- [Calculadora de sueldo neto](https://fiscalisto.com/calculadora-sueldo-neto): gross to net pay (and net to gross) for a Mexican salary in 2026: ISR with the art. 96 tariff, subsidio para el empleo and the employee's IMSS quotas, monthly, biweekly or weekly.
- [Calculadora de aguinaldo](https://fiscalisto.com/calculadora-aguinaldo): Christmas bonus (minimum 15 days, prorated), its 30 UMA ISR exemption and the ISR both with art. 96 LISR and art. 174 RLISR.
- [Finiquito y liquidación](https://fiscalisto.com/calculadora-finiquito): severance under the Ley Federal del Trabajo (prorated aguinaldo and vacations, prima vacacional, 3 months, 20 days per year, prima de antigüedad) with its ISR.
- [Calculadora de IVA y retenciones](https://fiscalisto.com/calculadora-iva): adds or removes IVA (16%, 8% border, 0%) and computes ISR/IVA withholdings for professional fees, rent, RESICO, freight and digital platforms.
- [Recargos y actualización](https://fiscalisto.com/calculadora-recargos-sat): inflation adjustment (INPC, CFF art. 17-A) and late-payment surcharges (2.07% monthly in 2026, 1.47% before) for a tax paid late to SAT.
- [Calcular RFC y CURP](https://fiscalisto.com/calcular-rfc-curp): computes a person's RFC with homoclave and CURP from name and birth date with SAT's procedure, and validates any RFC or CURP (format, date, check digit).
- [Tipo de cambio del DOF](https://fiscalisto.com/tipo-de-cambio-dof): the USD FIX exchange rate published in the Diario Oficial (and Banxico's EUR, CAD, GBP, JPY) for the day before any invoice or payment date, as CFF art. 20 requires.
- [Validar CLABE](https://fiscalisto.com/validar-clabe): checks an 18-digit CLABE's check digit and tells the bank, branch and account.
- [Uso del CFDI por régimen](https://fiscalisto.com/uso-cfdi-regimen-fiscal): which UsoCFDI values SAT accepts for each receptor's régimen fiscal in CFDI 4.0 (catCFDI 2026-10-01).
- [Buscador de claves SAT](https://fiscalisto.com/buscador-claves-sat): searches SAT's c_ClaveProdServ (52,000+ product and service codes, with SAT's synonyms) and c_ClaveUnidad by everyday words or code.
- [ISR de personas físicas](https://fiscalisto.com/calculadora-isr-personas-fisicas): monthly ISR for RESICO (1% to 2.5% of income, art. 113-E LISR, minus the 1.25% withheld by companies) and the provisional payment of actividad empresarial y profesional (art. 106 LISR, 2026 accumulated tariffs of Anexo 8 RMF).
- [Complemento de pago](https://fiscalisto.com/complemento-de-pago): reads a PPD invoice's XML in the browser and shows what its Pagos 2.0 payment complement carries for one payment: installment, previous balance, ImpPagado, saldo insoluto, the DR taxes in proportion to the payment, the Totales node and the deadline (5th of the next month).
- [Cuotas IMSS del patrón](https://fiscalisto.com/calculadora-cuotas-imss): 2026 employer and employee social security contributions by branch (IMSS, retiro, cesantía y vejez with the 2026 reform rates, Infonavit), from the salary, with the SBC and the employer's total cost.
- [Impuesto sobre nómina](https://fiscalisto.com/calculadora-impuesto-sobre-nomina): state payroll tax (ISN) on a payroll with each of the 32 states' 2026 rates, with one page per state.
- [Deducciones personales](https://fiscalisto.com/calculadora-deducciones-personales): a salaried person's annual return (ejercicio 2025 or 2026): deducciones personales with the global limit (lesser of 5 annual UMA or 15% of income), colegiaturas and retirement contributions outside it, the art. 152 annual tariff and the refund or balance due.
- [Calculadora de PTU](https://fiscalisto.com/calculadora-ptu): a worker's profit sharing (10% of renta gravable, half by days and half by salary), the 2021 cap (three months of salary or the three-year average), the 15 UMA ISR exemption and the ISR.
- [Validar e.firma](https://fiscalisto.com/validar-efirma): reads a SAT .cer in the browser and tells whether it is an e.firma (FIEL) or a CSD, its RFC, holder, certificate number and expiry; optionally checks that the .key and password match, without uploading them.
- [Lista 69-B por mes](https://fiscalisto.com/lista-69b-mensual): who SAT published each month in the 69-B list (presuntos, definitivos, desvirtuados, sentencia favorable), with RFC, name and oficio, one page per month, refreshed daily.

## Product

- [Inicio y precios](https://fiscalisto.com/): what the app does, an interactive demo and the plans.
- [Herramientas gratis](https://fiscalisto.com/herramientas): every free tool on one page.
- Contact: hola@fiscalisto.com