The monthly close already knows what's missing.

Iurefficient downloads each taxpayer's CFDI, computes income tax and VAT for seven regimes and compares the result with what was filed. Each client's close is a plan with owners and dates.

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Where does each client's close live?

At most firms, in separate spreadsheets and in the memory of whoever handles it.

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Today

Invoices are downloaded from the SAT by hand, one taxpayer at a time
Each regime is computed in a different spreadsheet
Nobody compares what was filed with what was computed
The close lives in someone's head

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With Iurefficient

SAT download with each taxpayer's e.firma
Income tax and VAT for seven regimes with one engine and each year's rate table
You record what was filed and paid; the difference is obvious
Each close is a plan with tasks, owners and due dates

Tax work, in one place

For firms that handle many taxpayers, each with their own regime.

SAT download

With each taxpayer's e.firma: issued and received, CFDI 3.3 and 4.0.

Taxes by regime

Income tax and VAT for regimes 601, 603, 605, 606, 612, 625 and 626, carrying forward VAT credit.

Filed versus computed

Drop the filing receipt and payment PDFs and what was filed is recorded, monthly and annual.

Classified deductions

Rules per line item and AI for what doesn't match; you confirm.

CFDI 4.0 invoicing

Several issuers, each with its own certificate and PAC, plus VAT and income tax withholding.

Accounting exports

Excel, CONTPAQi and Aspel COI with the chart of accounts.

The modules an accounting firm uses

Tax system (Mexico) Downloads, taxes by regime and filed versus computed. CFDI 4.0 invoicing Invoice on behalf of each client with their own certificate. Projects and PMO Each client's close as a plan with owners and dates. Case file AI assistant Ask about a client's documents and get the citation. Client portal The client uploads documents and sees pending items without emails. Timesheet Hours per client, to know what serving them costs.

See it in one minute

What changes at the firm

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Closes without surprises

The gap between computed and filed shows up before the SAT sees it.

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Every client in their file

Invoices, filings, documents and tasks for the same taxpayer together.

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Visible hours

You know which client takes the firm's time.

Your data, wherever you decide

Your project documents stay wherever you put them.

On your servers or in the cloud

Installed on your infrastructure, or on a dedicated instance we operate on Google Cloud.

Encrypted files

Every file is encrypted with AES-256-GCM and a per-project key; connections run over TLS.

Audit log

Key actions are logged with user, date, IP and device.

AI privacy

Enterprise APIs that don't train on your data, or a local model on your infrastructure.

Our security standards

🔐AES-256 encryption

📜Audit log

🏢On your servers or in the cloud

🤖Your documents don't train models

Learn more about our security

Frequently asked questions

Which regimes does it compute?

601 (companies), 603 (non-profits), 605 (salaries), 606 (rentals), 612 (business and professional activity), 625 (platforms) and 626 (RESICO). The calculation is an estimate to reconcile against what the accountant files; it doesn't replace them.