Free tools for CFDI and the SAT.
Calculate the VAT and withholdings on an invoice, verify a CFDI with the SAT and look up the official catalogs. Free, no sign-up.
Calculators and verification
- VAT (IVA) calculatorAdd or back out Mexican VAT at 16% or the 8% border-region rate, to the cent.
- Withholding calculatorISR and VAT withheld on professional fees, rent, RESICO and freight, with the legal basis.
- Verify a CFDI with the SATCheck whether an invoice is active or canceled using the SAT's public service.
Catalogs and guides
- SAT catalogsProduct and service keys, units, tax regimes, CFDI uses and the rest of the official catalogs.(opens in a new tab)
- Validate an RFCCheck the structure and check digit of an RFC (Mexican tax ID) before invoicing.(opens in a new tab)
- How to fill out a CFDI 4.0Field-by-field guide to the invoice, with the catalogs that apply to each one.(opens in a new tab)
- CFDI use by tax regimeWhich CFDI uses each recipient tax regime accepts.(opens in a new tab)
On catalogoscfdi.com, our SAT catalogs site.
Issue your CFDI online, since 2008.
10 free stamps, no credit card. Ultra-fast stamping, valid with the SAT.
Issue CFDI 4.0 online, since 2008.
10 free stamps, no credit card.