Containn delivers the hotel's books in the format the SAT (Mexico's tax authority) requires: the electronic accounting XML defined in Anexo 24 (the SAT's technical annex for electronic accounting), version 1.3. It's a public format: any accountant can review it and any system that reads it can use it.
What comes out of Containn
| File | File name | What it contains |
|---|---|---|
| Chart of accounts (section A) | RFC + year + month + CT.xml | Every active account with its grouping code, number, description, parent account, level and normal balance. |
| Trial balance (section C) | RFC + year + month + BN.xml | Every lowest-level account with a balance or activity: opening balance, debits, credits and closing balance for the month. |
| Journal entries for the period | RFC + year + month + PL.xml | Every póliza (journal entry) of the month with its lines and the UUID (folio fiscal) of the tax invoices for its date. |
The RFC is the hotel's Mexican taxpayer ID. The chart of accounts and the trial balance are downloaded from Containn → Entrega al SAT (SAT filing): type the month in the Mes field (year-month, for example 2026-09) and press each file's button, which carries its name. The screen shows how many accounts each file holds and, for the trial balance, total debits and credits.
Journal entries, when the SAT asks for them
Entries aren't filed every month: they're delivered when the SAT requires them, in an audit or in a refund or offset procedure. Containn builds the XML of the period's entries from the same general ledger, with the UUID (the folio fiscal, a CFDI's unique ID; a CFDI is Mexico's electronic invoice) already stored with each daily entry (Journal entries in XML).
What it looks like inside
One chart of accounts line and two trial balance lines, with sample data:
<?xml version="1.0" encoding="UTF-8"?> <catalogocuentas:Catalogo xmlns:catalogocuentas="www.sat.gob.mx/esquemas/ContabilidadE/1_3/CatalogoCuentas" Version="1.3" RFC="AAA010101AAA" Mes="09" Anio="2026"> <catalogocuentas:Ctas CodAgrup="101.01" NumCta="101-01" Desc="Caja del hotel" SubCtaDe="101" Nivel="2" Natur="D"/> </catalogocuentas:Catalogo>
<?xml version="1.0" encoding="UTF-8"?> <BCE:Balanza xmlns:BCE="www.sat.gob.mx/esquemas/ContabilidadE/1_3/BalanzaComprobacion" Version="1.3" RFC="AAA010101AAA" Mes="09" Anio="2026" TipoEnvio="N"> <BCE:Ctas NumCta="101-01" SaldoIni="15000.00" Debe="84250.00" Haber="79100.00" SaldoFin="20150.00"/> <BCE:Ctas NumCta="208-01" SaldoIni="12480.00" Debe="0.00" Haber="9600.00" SaldoFin="22080.00"/> </BCE:Balanza>
Before you file
- The files come out unsigned. Your accountant signs them with the hotel's e.firma (the advanced electronic signature issued by the SAT) and submits them through the Buzón Tributario (the SAT's online taxpayer mailbox). Containn doesn't store the e.firma or send anything to the SAT.
- They carry the RFC the hotel invoices under. It's taken from the invoicing tax data; without it, the files aren't generated.
- The trial balance is a regular filing. Today the screen doesn't generate a supplementary trial balance.
- The chart of accounts goes with the first trial balance and again whenever an account changes.
What doesn't export from Containn today
Beyond those files, nothing in Containn downloads today: entries, account detail, the on-screen trial balance, the financial statements, accounts payable, payroll and fixed assets are viewed on screen, with no PDF, Excel or CSV download button. There's also no entries file to import into another accounting system.
What you can download from other screens
- Finances: Reports, Operating income, Trial balance, Movement journal and Guest balances, in Excel and PDF; Accounts receivable and OTA reconciliation, in CSV.
- Spider Data → Advanced Reports: Night Audit Totals, Daily Movement Detail, Daily Revenue, Tax Report, Channel P&L, AR Aging, Cashier Audit and Guest Ledger & Master Accounts, in Excel and PDF.
- Invoicing (if the hotel invoices from the platform): each invoice's PDF and XML under Invoices, and the invoicing reports in PDF and Excel.