ALCE FiscalALCE Fiscal · 100% free · No sign-up

Validate and Manage Your CFDI in Minutes

Tax tools for Mexico: CFDI 4.0 validator, bulk download, accounting reconciliation and more. Clear explanations for every SAT error.

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Nuevo:Devolución de IVA ante el SAT+52 999 955 7721 — WhatsApp
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Devolución de IVA ante el SAT

Genera el expediente completo para tu trámite en minutos. Clasificación automática de CFDIs PUE/PPD, cálculo del saldo a favor, scoring de riesgo y expediente ZIP listo para presentar.

  • Clasifica CFDIs PUE, PPD y REP automáticamente
  • Calcula saldo a favor con 15+ validaciones SAT
  • Score de riesgo fiscal 0–100
  • Exporta PDF, Excel y ZIP para el trámite
Preparar expediente

Requiere CFDIs descargados del SAT. Usa Descarga Masiva primero.

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CFDIs validated

10

Free tools

200+

SAT rules verified

Why ALCE Fiscal?

Errors in plain language

We don't just flag errors: we explain what they mean, why they matter, and how to fix them.

Automatic correction

We fix arithmetic and catalog errors instantly. Download your corrected XML ready to stamp.

Bilingual Spanish / English

Ideal for foreign subsidiaries in Mexico and the nearshoring boom. Reports and UI in both languages.

100% free

No sign-up, no daily limits, no tricks. Professional tools accessible to everyone.

VAT refund working papers

Generate the complete dossier for your SAT refund request: classify PUE/PPD CFDIs, calculate your credit balance, detect risks and export PDF, Excel and ZIP ready to submit.

What makes us different

We're not just another generic validator. ALCE Fiscal is designed to help you understand your tax situation, not just process files.

Clear explanations of technical errors

Every error, every line of your VAT filing, every reconciliation discrepancy — explained like an accountant would, not as a cryptic SAT code.

Automatic PUE vs PPD distinction

Your VAT is calculated correctly based on the actual payment moment. No free tool makes this distinction that SAT requires.

Smart alerts

We alert you when you have PPD invoices without payment complements, foreign currency CFDIs without exchange rates, or suppliers on the SAT blacklist.

CFDI-by-CFDI breakdown

Every number in your VAT filing is clickable. You see exactly which invoices compose it and why they were included.

Bilingual reports for nearshoring

Foreign companies operating in Mexico need reports their CFOs can understand. Everything works in both Spanish and English.

No installation, no hidden costs

Not a $10,000 desktop software. It's a free web platform that works from your browser.

Unique in Mexico: VAT refund dossier ready to submit

No free tool gives you the complete VAT refund dossier: automatic CFDI classification, fiscal risk score, SAT validations and a ZIP ready to attach to your refund request.

Our Tools

CFDI Validator

Upload your XML file and validate that your CFDI meets all SAT requirements. Get a detailed error and warning report.

Go to Validator

EFOS Monitor

Check if an RFC appears on the SAT blacklist (Art. 69-B). Individual or bulk vendor verification.

Check EFOS

Payment Complement Assistant

Generate the Payment Complement (REP) XML from your PPD invoice. Calculate installments and taxes automatically.

Generate REP

SAT Code Search

Find the correct ClaveProdServ and ClaveUnidad for your invoice. Database with 52,000+ SAT products.

Search codes

ISR/IVA Calculator

Calculate your ISR and IVA in seconds. RESICO, general regime and corporations with updated tables.

Calculate ISR

RFC Verifier

Verify if an RFC is active and current with SAT. Check name and taxpayer status.

Verify RFC

Tax Reconciliation

Compare your accounting records against issued and received CFDIs to detect discrepancies.

Go to Reconciliation

VAT Declarations

Pre-calculate your monthly provisional VAT filing with CFDI breakdown and clear explanations.

Go to Declarations

Mass Download

Download all your CFDIs from the SAT portal in bulk, organized and ready to use.

Go to Mass Download
Nuevo

VAT Refund

Generate working papers for your VAT refund request with SAT. Calculate the credit balance, classify PUE/PPD CFDIs, detect risks and export the complete dossier.

Prepare dossier

Guide: 10 most common CFDI errors

Learn to identify and fix the errors SAT rejects. Practical guide based on thousands of real validations.

Download free guide

Why ALCE Fiscal?

Compare features and pricing against CONTPAQi, XPD.mx, ValidaCFDI and more. Discover why we're the best option.

View comparison

Frequently Asked Questions

What tax tools does ALCE Fiscal offer?▼
ALCE Fiscal offers 10 free tax tools for Mexico: CFDI 4.0 validator, bulk invoice download from SAT with e.firma, tax reconciliation, provisional VAT declarations, VAT refund working papers, EFOS blacklist monitor, payment complement assistant (REP), SAT product code search, ISR/IVA calculator, and RFC verifier.
Is CFDI validation free on ALCE Fiscal?▼
Yes, the ALCE Fiscal CFDI validator is 100% free with no limits. You can validate CFDI 4.0 and 3.3 invoices (income, expense, payroll, payment complement, transfer) without creating an account. Beyond structure validation, we verify the cryptographic seal, CSD certificate, SAT status, and specific complements like Pagos 2.0 and Nómina 1.2.
Does ALCE Fiscal detect errors and suggest corrections?▼
Yes. When we detect an error in your CFDI, we explain what it means, why it matters, and how to fix it. For arithmetic and catalog errors, we automatically generate a corrected XML you can download ready for stamping with your PAC.
Can I download my invoices from SAT with ALCE Fiscal?▼
Yes. With your e.firma (FIEL), you can request bulk download of all your issued and received CFDIs directly from SAT web services. ALCE Fiscal connects to the official SAT download service, organizes your files, and notifies you by email when they're ready.
What makes ALCE Fiscal different from other CFDI validators?▼
ALCE Fiscal is the only platform that combines multi-stage validation with clear error explanations, automatic XML correction, SAT bulk download, tax reconciliation, and VAT declarations — all free and bilingual (Spanish/English). Other tools only validate basic structure or charge for advanced features.
Does ALCE Fiscal work for nearshoring companies?▼
Yes. The entire platform works in Spanish and English, including tax reports, VAT declarations, and error messages. It's ideal for foreign subsidiaries operating in Mexico that need their international finance teams to understand the tax situation.
What are VAT refund working papers?▼
They are the documents SAT may request to review and approve a VAT refund: CFDI classification by payment method (PUE/PPD), list of payment complements (REP), credit balance calculation, credit note and withholding analysis. ALCE Fiscal generates them automatically from CFDIs downloaded from SAT.
Can I file a VAT refund directly with ALCE Fiscal?▼
ALCE Fiscal generates the working papers and a ZIP dossier with all supporting documents. The formal filing with SAT (through the SAT portal or with a PAC) is the accountant's responsibility. The papers include the credit balance calculation, risk alerts, and the checklist of required documents for the process.
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