How it works
In self-billing (autofaturação), the buyer (your company) issues the invoice on the supplier’s behalf. ARQTA automates the whole cycle and keeps every document in line with AT’s rules.
Record the payments to your service providers
Enter payments one by one or import them in bulk (CSV). ARQTA calculates the VAT automatically (from an amount including or excluding tax, at the rate of the tax region: Mainland, Azores or Madeira, or exempt with its reason code) and the withholding tax (IRS) on the taxable base.
The supplier authorises - just once
Each supplier receives an e-mail invitation with a personalised step-by-step guide to register the prior self-billing agreement (acordo prévio de autofaturação) in the Portal das Finanças (≈3 minutes, no passwords shared). ARQTA checks with AT automatically when the agreement becomes active and sends reminders to those who have not finished yet.
Series registered with AT, with ATCUD
As soon as the agreement exists, ARQTA registers the document series (FT and NC) through AT’s webservice and receives the validation code that forms part of each document’s ATCUD. No manual steps.
Invoices issued and signed automatically
Invoices are generated with sequential numbering, an RSA signature chain (Portaria 363/2010), a QR code (Portaria 195/2020) and the certified program statement. Payments recorded before the supplier is ready wait in a queue and are issued on their own the moment the agreement is confirmed.
Reporting to AT and SAF-T
Every document is reported to e-Fatura; the SAF-T (PT) export per supplier comes out ready to submit, including cancelled documents and credit notes with the required references.