# Containn

> Your hotel’s night audit, turned into double-entry bookkeeping balanced to the cent, on a chart of accounts already set up for the SAT, Mexico’s tax authority.

## Pages
- [Home](https://www.containnsoft.com/en/)
- [Product](https://www.containnsoft.com/en/producto)
- [Journal entries and general ledger](https://www.containnsoft.com/en/producto/polizas): One journal entry per signed-off day, and none that don’t balance.
- [Financial statements](https://www.containnsoft.com/en/producto/estados): Income statement, balance sheet and trial balance, from the general ledger.
- [SAT compliance](https://www.containnsoft.com/en/producto/sat): Annex 24 electronic accounting, from your books.
- [Accounts payable](https://www.containnsoft.com/en/producto/proveedores): The supplier invoice, with its creditable VAT (IVA) where it belongs.
- [Payroll](https://www.containnsoft.com/en/producto/nomina): Payroll in the books, with withholdings kept separate.
- [Fixed assets](https://www.containnsoft.com/en/producto/activos): Monthly straight-line depreciation, no spreadsheet needed.
- [Banking and reconciliation](https://www.containnsoft.com/en/producto/bancos): Your bank statement against your books, with matches already suggested.
- [Month-end and year-end close](https://www.containnsoft.com/en/producto/cierre): A closed month is a month that no longer changes.
- [CFDI invoicing](https://www.containnsoft.com/en/producto/facturacion): CFDI 4.0 invoices, each linked to its journal entry.
- [Audit and internal control](https://www.containnsoft.com/en/producto/auditoria): Every peso has a name, a date and someone responsible.
- [For the accountant](https://www.containnsoft.com/en/para-quien/contador)
- [For the general manager](https://www.containnsoft.com/en/para-quien/gerente)
- [For the owner](https://www.containnsoft.com/en/para-quien/dueno)
- [For hotel groups](https://www.containnsoft.com/en/para-quien/grupos)
- [Compare](https://www.containnsoft.com/en/comparar)
- [Pricing](https://www.containnsoft.com/en/precios)
- [Roadmap](https://www.containnsoft.com/en/roadmap)
- [Security](https://www.containnsoft.com/en/seguridad)
- [Contact](https://www.containnsoft.com/en/contacto)

## Documentation
- [What Containn is](https://www.containnsoft.com/en/docs/que-es-containn): Hotel accounting that starts from each day's close: double-entry pólizas, financial statements and SAT filings, all on the same books.
- [How it connects to hotel operations](https://www.containnsoft.com/en/docs/como-se-conecta-con-la-operacion): From the front desk to the póliza: how each charge, payment and deposit of the day reaches the books without anyone keying it in again.
- [Setup: the six first-day steps](https://www.containnsoft.com/en/docs/instalacion-primer-dia): From an empty chart of accounts to the first póliza: load accounts, review them, map concepts and taxes, sign the day and check it posted.
- [Glossary of accounting and hotel terms](https://www.containnsoft.com/en/docs/glosario): The terms used in Containn and in these docs, from póliza to day cutoff, explained in a line or two.
- [If you are the hotel's accountant](https://www.containnsoft.com/en/docs/ruta-contador): Your path in Containn: chart of accounts, mapping, manual pólizas, month-end close, SAT files and the permissions you need.
- [If you are the general manager](https://www.containnsoft.com/en/docs/ruta-gerente-general): Review and sign the day, watch reopenings and read the month's statements: your path through the day close and Containn.
- [If you are the night auditor](https://www.containnsoft.com/en/docs/ruta-auditor-nocturno): Run the close, review the day's reports and sign: what your signature does in the books and what to do when something is off.
- [If you work at the front desk](https://www.containnsoft.com/en/docs/ruta-recepcion): Folio charges and payments, deposits and the shift close: what you enter at the desk ends up in the books, and how to get it right.
- [If you are the owner](https://www.containnsoft.com/en/docs/ruta-dueno): Know how the month is going before it ends: what to read in the statements, what to watch and which permissions only you grant.
- [If you are coming from another accounting system](https://www.containnsoft.com/en/docs/si-vienes-de-otro-sistema): Feature by feature, where to find what you already know, how to start with your opening balances and what Containn does not do.
- [The base chart of accounts for Mexico, account by account](https://www.containnsoft.com/en/docs/catalogo-base-mexico): The 36 accounts Containn loads in one step, with their SAT grouping code and normal balance, and what your accountant still needs to add.
- [Account roles: what each one does](https://www.containnsoft.com/en/docs/papeles-de-cuenta): A role tells Containn which account to use when it writes an entry on its own: guests, taxes, deposits, suppliers and the year-end close.
- [How to add your own account without breaking the journal entry](https://www.containnsoft.com/en/docs/agregar-cuenta-propia): Adding an account field by field, the example of the account for the year-end close, and what to watch so the daily journal entry keeps coming out.
- [The SAT grouping code, explained](https://www.containnsoft.com/en/docs/codigo-agrupador-sat): What the Anexo 24 grouping code is, how Containn suggests it when loading the chart, and why its first digit decides where each account shows up.
- [What a concept is and why it exists](https://www.containnsoft.com/en/docs/que-es-un-concepto): A concept is the code your accountant uses to recognize each line of the daily close. It is the bridge between hotel operations and the books.
- [How to map your codes to your accounts](https://www.containnsoft.com/en/docs/mapear-conceptos): A one-time setup: which account each hotel concept goes to. With it, every signed day becomes a journal entry without anyone keying it in.
- [Concepts without an account: what it means and how to fix it](https://www.containnsoft.com/en/docs/conceptos-sin-cuenta): One line without an account leaves the day without a journal entry: Containn never writes half an entry. How to spot it, fix it, and handle days already signed.
- [Taxes: one account per tax](https://www.containnsoft.com/en/docs/una-cuenta-por-impuesto): Each hotel tax can have its own account so the journal entry doesn't lump IVA and ISH together. Which lines are split today and which go to the general account.
- [Folio charge categories](https://www.containnsoft.com/en/docs/categorias-de-cargo): Every folio charge carries a category, and every category needs a revenue account, through its concept or its role. Early departure is not included.
- [The daily póliza, line by line](https://www.containnsoft.com/en/docs/poliza-del-dia): How the sheet your night auditor signs becomes a balanced revenue póliza: which account each line hits and what the póliza keeps.
- [Manual pólizas](https://www.containnsoft.com/en/docs/polizas-manuales): How to capture an opening, adjustment, accrual or reclassification póliza, and the rules checked before it is saved.
- [Canceling a póliza](https://www.containnsoft.com/en/docs/cancelar-una-poliza): A póliza is never deleted: what canceling means, what happens today with each kind of póliza, and how to fix a wrong manual póliza.
- [Why a póliza is not generated: the eleven reasons](https://www.containnsoft.com/en/docs/por-que-no-se-genera-una-poliza): The eleven reasons a signed day ends up without a póliza, where you see it on screen, and how to fix each one.
- [Póliza numbering and the accounting period](https://www.containnsoft.com/en/docs/consecutivo-y-periodo): How pólizas are numbered, which month each one lands in based on its date, and what happens to the number of a canceled póliza.
- [Income statement](https://www.containnsoft.com/en/docs/estado-de-resultados): What the hotel earned or lost in the month or year to date, by category, calculated from the same general ledger that is delivered to the SAT.
- [Balance sheet](https://www.containnsoft.com/en/docs/balance-general): What the hotel owns and owes at a month end: assets, liabilities and equity, with the year's result in its place and the balance check in plain sight.
- [Cash flow statement, direct method](https://www.containnsoft.com/en/docs/flujo-de-efectivo): How Containn builds the cash flow statement: the direct method of NIF B-2, classified by offsetting account and checked against the balance sheet.
- [Trial balance](https://www.containnsoft.com/en/docs/balanza-de-comprobacion): Every account with its opening balance, the period's activity and its closing balance: the accountant's worksheet, one click from the account ledger.
- [Account ledger](https://www.containnsoft.com/en/docs/auxiliar-de-cuenta): An account's movements, one by one, with their date, póliza, description and running balance. To find out what left a balance where it is.
- [Accounts payable](https://www.containnsoft.com/en/docs/cuentas-por-pagar): Record the supplier invoice with its creditable IVA, pay it in full or in part, and see what you owe by supplier, every movement with its póliza.
- [Payroll](https://www.containnsoft.com/en/docs/nomina): Enter the payroll your payroll firm calculated: Containn creates the three-account póliza and the payment one. It books payroll, it does not calculate it.
- [Fixed assets and depreciation](https://www.containnsoft.com/en/docs/activos-fijos): Register what the hotel bought to last for years and run its straight-line depreciation every month, with its póliza and no spreadsheet.
- [Banks and reconciliation](https://www.containnsoft.com/en/docs/bancos-y-conciliacion): Paste the bank statement, confirm what Containn suggests against supplier payments and OTA deposits, and tie the bank out to your books.
- [Month-end close](https://www.containnsoft.com/en/docs/cierre-de-mes): What Containn checks before it lets you close a month, how you close it, and what can no longer happen in a closed period.
- [Year-end close](https://www.containnsoft.com/en/docs/cierre-de-ejercicio): How Containn zeroes out the income statement accounts at year end and moves the year's profit or loss to the equity account you choose.
- [Reopening: when, who, and what gets recorded](https://www.containnsoft.com/en/docs/reaperturas): Reopening a signed day, a month or a fiscal year: the special permission each one needs, the order they reopen in, and what gets recorded.
- [Electronic accounting: what you file and when](https://www.containnsoft.com/en/docs/contabilidad-electronica): Which Anexo 24 files the SAT requires, the deadlines, which ones Containn produces, and who signs and submits them.
- [Chart of accounts in XML](https://www.containnsoft.com/en/docs/catalogo-xml): The chart of accounts file with the SAT grouping code on every account: what it contains, when it is filed and how to download it.
- [Trial balance in XML](https://www.containnsoft.com/en/docs/balanza-xml): The monthly Anexo 24 trial balance: opening balance, debits, credits and closing balance for each account, computed from the hotel's ledger.
- [Pólizas in XML](https://www.containnsoft.com/en/docs/polizas-xml): When the SAT requests your journal entries: the Anexo 24 file with each póliza, its lines and the UUID of the linked invoices.
- [What Containn does NOT do, and why](https://www.containnsoft.com/en/docs/que-no-hace-containn): Today's limits, stated plainly: no sealing or submitting to the SAT, no tax returns, no payroll calculation, no supplier XML import, no bank feed.
- [Stamping a CFDI 4.0 invoice](https://www.containnsoft.com/en/docs/timbrar-cfdi): How to issue the invoice for a stay, a master account or a standalone invoice, sealed with your hotel's digital seal.
- [Cancelling an invoice](https://www.containnsoft.com/en/docs/cancelar-comprobante): How to ask the SAT to cancel a CFDI: which reason to choose, what signs the request and how to tell whether it went through.
- [Guest self-invoicing](https://www.containnsoft.com/en/docs/autofacturacion): Guests invoice their own stay from a link or from the hotel's website, without going through the front desk. Deadlines, split invoices, cancellation.
- [Payment complement](https://www.containnsoft.com/en/docs/complemento-de-pago): Invoices on credit (PPD) and their payments: how each payment is recorded with its installment number, prior balance and remaining balance.
- [The digital seal certificate: how to upload it and where it lives](https://www.containnsoft.com/en/docs/certificado-de-sello-digital): What the CSD is, how it differs from the e.firma, how to upload it, and why its private key is not stored in Containn's database.
- [Why a signed day is never recalculated](https://www.containnsoft.com/en/docs/dia-firmado-no-se-recalcula): When the close is signed, Containn freezes the day's figures. A later correction shows up on the day it was made and never rewrites what was signed.
- [Accrual versus cash: why they don't match, and shouldn't](https://www.containnsoft.com/en/docs/devengado-contra-flujo): What the hotel earned and what came into the drawer are two different numbers on the same day. Why Containn reports them separately, and which the books use.
- [The deposit ledger](https://www.containnsoft.com/en/docs/libro-de-depositos): An advance deposit collected before arrival is a liability, not a payment on the folio. How Containn records it, and why its transfer is a dated transaction.
- [The business date and its cutoff](https://www.containnsoft.com/en/docs/dia-de-operacion-y-corte): Your accounting day starts at the hour you close, not at midnight. How to set the cutoff, and why a miscalculated window looks like a number, not an error.
- [Why a póliza is never edited](https://www.containnsoft.com/en/docs/poliza-nunca-se-edita): An entry that can be edited isn't an entry. How to correct a mistake in Containn without touching what was already recorded.
- [Precision and rounding: where rounding happens, and why only once](https://www.containnsoft.com/en/docs/precision-y-redondeo): How Containn avoids the one-cent difference: the net is stored to six decimals and rounding happens only once, when charging and when posting.
- [The five accounting permissions](https://www.containnsoft.com/en/docs/cinco-permisos): View, configure, record, close the month and reopen it: what each Containn permission allows, who grants it, and how to separate duties.
- [Audit trail](https://www.containnsoft.com/en/docs/rastro-de-auditoria): What Containn records, and how to follow a peso from the trial balance to the person or process that recorded it.
- [Safeguarding your information](https://www.containnsoft.com/en/docs/resguardo-de-la-informacion): What Containn keeps and what it doesn't: the digital seal, the e.firma, bank accounts, permissions and how each hotel's information is kept separate.
- [The entry doesn't balance](https://www.containnsoft.com/en/docs/la-poliza-no-cuadra): Why an unbalanced entry is never saved, how to find the line that breaks it, and what to do with each message on screen.
- [Cash flow doesn't tie to the balance sheet](https://www.containnsoft.com/en/docs/el-flujo-no-cuadra): When the cash drawer, Bancos or your bank statement disagree with the balance sheet: which number rules and where the gap opens.
- [A day shows no activity](https://www.containnsoft.com/en/docs/dia-sin-movimientos): Why a day has no entry or shows up empty in your books, how to tell whether it was signed, and what to do in each case.
- [The tax landed in the general account](https://www.containnsoft.com/en/docs/impuesto-en-cuenta-general): Why IVA or ISH on the daily entry fell into the general output-tax account, and how to send each tax to its own account.
- [Bank reconciliation suggests nothing](https://www.containnsoft.com/en/docs/conciliacion-no-propone): Why a bank statement line shows no matches in Bancos, what Containn looks for to suggest one, and what to do with lines that get no suggestion.
- [Financial reports catalog](https://www.containnsoft.com/en/docs/catalogo-de-reportes): The financial reports at hand: where each one lives, which question it answers and the basis it's calculated on.
- [Export formats](https://www.containnsoft.com/en/docs/formatos-de-exportacion): Which files come out of Containn and in what format: chart of accounts, trial balance and entries in Anexo 24 XML, plus downloads on other screens.
- [Frequently asked questions](https://www.containnsoft.com/en/docs/preguntas-frecuentes): Short answers to what accountants, general managers and owners ask most about Containn, each linked to the article with the full explanation.

## Full content
- [llms-full.txt](https://www.containnsoft.com/llms-full.txt)