Get your SIFERE Web deducciones through an API

What you can build on SIFERE Web

• Get deductions suffered in a period

  Build this

  Reads the retenciones, percepciones and recaudaciones bancarias reported by agents for one CUIT and period, by jurisdiction, in the Módulo Consultas.

  Takes

  CUIT, period (year and month)

  Returns

  Jurisdiction, deduction type, source system, agent, date, amount

• List monthly returns and their state

  Build this

  Reads SIFERE > Mensuales in the Módulo Consultas: the DDJJ mensuales presented for one CUIT in the periods you choose.

  Takes

  CUIT, first period, last period

  Returns

  Period, form (CM03 or CM04), sequence, presentation date, state, amount per jurisdiction

• Get payments by period and jurisdiction

  Build this

  Reads SIFERE > Pagos in the Módulo Consultas: the monthly payments made for one CUIT, period and jurisdiction.

  Takes

  CUIT, period, jurisdiction (optional)

  Returns

  Period, jurisdiction, payment date, payment network, amount

• Generate the VEP for a presented return

  Build this

  Opens a presented DJ in the Módulo DDJJ, runs Generar Pago de DJ, marks the jurisdictions to pay, picks the red de pago and sends the VEP.

  Takes

  CUIT, period, jurisdictions to pay, payment network

  Returns

  Period, jurisdictions, amount per jurisdiction, payment network, VEP state

Automate SIFERE Web with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• New retenciones and percepciones, for each CUIT

  Build this

  Starts

  Every weekday at 8:00, Buenos Aires time

  Step 1

  For each CUIT you name, get the deductions suffered in the current period.

  Step 2

  Keep the deductions that were not there on the last run.

  Step 3

  Email you the new ones, grouped by CUIT and jurisdiction, with agent, type and amount.

• Returns not yet presented after the vencimientos

  Build this

  Starts

  Every month on the 21st at 9:00, Buenos Aires time

  Step 1

  For each CUIT, list the DDJJ mensuales for last month's period.

  Step 2

  Keep the CUITs with no CM03 or CM04 presented for that period.

  Step 3

  Email you the CUITs that are missing a return.

• Monthly payments, posted to your accounting system

  Build this

  Starts

  Every month on the 22nd at 10:00, Buenos Aires time

  Step 1

  For each CUIT, get the payments for last month's period, by jurisdiction.

  Step 2

  Stop when there are none.

  Step 3

  Post CUIT, period, jurisdiction, payment date, network and amount to your ERP webhook.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get deductions suffered in a period” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "www.ca.gob.ar/get_deductions_suffered",
    "input": {
      "cuit": "30-12345678-9",
      "period": "2026-10"
    }
  }'

{
  "status": "completed",
  "data": {
    "cuit": "30-12345678-9",
    "period": "2026-10",
    "deductions": [
      {
        "jurisdiction": "902 Buenos Aires",
        "type": "Recaudación bancaria",
        "source": "SIRCREB",
        "agent": "Northwind Bank",
        "date": "2026-10-14",
        "amount": 18240.55
      }
    ],
    "currency": "ARS"
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

SIFERE Web’s own options

The Comisión Arbitral's SIFERE pages describe the web application and no API for taxpayers. Inside SIFERE Web you can import a DJ's alícuotas, bases imponibles and ajustes from an XML or Excel file, load deductions by lote and export them, and download each DJ as PDF.

Read on November 12, 2026: SIFERE frequently asked questions, Advantages of an XML or Excel file, Basic steps to prepare a DJ (PDF).

Signing in to SIFERE Web

You enter SIFERE Web at www.ca.gob.ar/sifere or from ARCA's site with your CUIT and Clave Fiscal, once the SIFERE WEB DDJJ and Consultas services are added for the CUIT. It then lists the CUITs your user may work on. With Fous you sign in once through that sign-in with your own account, and the login is sealed with AES-256 and never returned by the API.

Worth knowing

Deductions arrive day by day

Deductions are updated daily from the returns agents present. Percepciones aduaneras (SIRPEI) usually arrive after the 7th of each month and SIRTAC around the 12th.

Not every withholding is listed

Some jurisdictions (901, 902, 908, 913 and 924) are not in SIRCAR, 904 only since June 2016, and not every agent reports there. Missing ones are added by hand or by lote.

Include deductions before closing

Whatever the method of loading, deductions reach the DJ only after you press Incluir Deducciones en DJ. Coefficient edits are allowed only when no DJ is in borrador.

Due dates follow the CUIT's last digit

For 2026, the CM03 and CM04 for each anticipo fall due on four dates by verifier digit, for October from 13 to 18 November 2026. The CM05 for 2025 was due on 30 June 2026.

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