AGT e-invoicing for Sage X3
The module that connects Sage X3 to the AGT webservices: series, invoice submission, validation and rejections, under Presidential Decree 71/25 and Executive Decree 683/25. Contracted per document pack per year.
QR and AGT number generated when the invoice is posted
- 01
Direct connection to the AGT
Invoices sent to the AGT webservices, one by one or in batches, with an immediate response.
- 02
Certified by the AGT
Module certified by the AGT for e-invoicing, certificate no. FE/146/AGT/2026.
- 03
About the Angolan localisation
Works with Sage X3 Local Angola, which already handles VAT, SAF-T and certification.
How it works
From Sage X3 to the AGT, invoice by invoice
The path the module follows for each invoice, under the rules of the AGT technical specification.
- 01Authorised series
Document series are requested from the AGT in Sage X3 and are only used once authorised.
- 02Invoice posted
When the invoice is posted, Sage X3 generates the AGT number and the QR code.
- 03Two signatures
Each request carries the software’s signature and the issuing company’s signature, both RS256 (RSA with SHA-256).
- 04Submission
Over an encrypted channel, one invoice at a time or in batches, manually or through an automatic Sage X3 process.
- 05Validation
Sage X3 checks the status: green if valid, orange if rejected, with the AGT’s reason so it can be corrected and resent.
- Certified by the AGT
- Certificate no. FE/146/AGT/2026, for e-invoicing.
- Each company’s keys
- Private keys are tied to each company, in the customer’s own Sage X3.
- Encrypted channel
- All communication with the AGT runs over HTTPS.
- A trail for every submission
- The request ID, the data sent and the AGT’s response are all recorded.
In summary
- What it is
- E-invoicing module for Sage X3, developed and maintained by Sevways, additional to Sage X3 Local Angola.
- Legal basis
- Presidential Decree 71/25 (Legal Regime for Invoices) and Executive Decree 683/25 (technical specifications and communication with the AGT).
- Deadlines
- Mandatory since 1 January 2026 for large taxpayers, State suppliers and transactions above 25 million kwanzas; from 1 January 2027 for the general VAT regime.
- Prerequisites
- Sage X3 version 12, patch 35 or later, with Sage X3 Local Angola, and a stable network to communicate with the AGT.
- Contracting
- Annual subscription per Sage X3 installation, in one of five document tiers, from 1,000 to 100,000 a year.
Who it is for
Large taxpayers and State suppliers
Already required since 1 January 2026.
General VAT regime companies
Required from 1 January 2027, and need six to ten weeks to prepare.
Sage X3 partners in Angola
That want to offer e-invoicing to their clients without developing it.
In the finance team’s day-to-day
What the module does
The functions that Executive Decree 683/25 requires, inside Sage X3.
Series
Advance notification of series to the AGT, which assigns them, and management of the assigned series.
Submission
Transmission to the AGT webservices, invoice by invoice or in batches, with confirmation or structural error on the spot.
Two-phase validation
Structure validation on submission and later retrieval of the content validation result.
Rejections
Rejected invoices handled in Sage X3, with the reason given by the AGT.
Query
History of reported invoices and document validation, with two months of query.
Tiers by document volume
Annual subscription per Sage X3 installation. The price of each tier comes with the proposal. If the company goes over the document limit, it moves to the next tier.
Starter
Up to 1,000 documents per year.
Standard
Up to 3,000 documents per year.
Advanced
Up to 9,000 documents per year.
Premium
Up to 25,000 documents per year.
Enterprise
Up to 100,000 documents per year.
E-invoicing timeline
- 01
20 March 2025
Presidential Decree 71/25 makes e-invoicing and the reporting of invoices to the AGT mandatory.
- 02
22 August 2025
Executive Decree 683/25 defines the data structure, the webservices and the procedures.
- 03
1 January 2026
Mandatory for large taxpayers, State suppliers and transactions above 25 million kwanzas.
- 04
1 January 2027
Mandatory for all taxpayers in the general VAT regime; afterwards, for the simplified regime.
To get started
- Choosing the tierby the number of invoices and equivalent documents the company issues per yearin the proposal
- Sage X3 versionconfirm version 12, patch 35 or later, and Sage X3 Local Angolain the assessment
- Series, customer data and trainingthe work on the company's side, while operations continue6 to 10 weeks
- Activationseries notification and first submissions to the AGTbefore the company’s deadline
The six to ten weeks are those of e-invoicing preparation in Angola, in projects we have supported.
How to buy
Annual subscription per Sage X3 installation, in one of the five tiers. The price covers the e-invoicing module only; the Sage X3 Local Angola localisation and the Sage X3 contract stay as they are. Companies with seasonal volumes can ask for their own terms. Sage X3 partners can take out the module for their customers.
Sage Business Partner. Sevways has developed the Sage X3 Local Angola localisation since 2019; SGSI, in Luanda, represents it before the AGT.
Quote
Choose the tier for your company
Tell us how many invoices you issue a year in Angola and which Sage X3 version you run. We reply with the tier, the price and the activation date.
Frequently asked questions
Which tier should I choose?
The one that covers the invoices and equivalent documents the company issues in a year. If you go over the limit, you move to the next tier; with seasonal peaks, we agree specific terms.
Why aren’t the prices on the website?
The price depends on the tier and on what the company already has in Sage X3. With the details from your request we reply with the proposal, usually within two working days.
Do I need Sage X3 Local Angola?
Yes. The module adds to the Angolan localisation, which already handles VAT, SAF-T (AO) and invoice signing.
Which Sage X3 version is needed?
Version 12, patch 35 or later. On earlier versions, the upgrade comes first.
What happens if the AGT rejects an invoice?
Sage X3 shows the rejected invoice with the reason given by the AGT, so you can correct it and send it again.
What changes on 1 January 2027?
The obligation extends to all taxpayers in the general VAT regime. Preparation takes six to ten weeks, so it is best to start in the last quarter of 2026.
Got a project? Let us talk.
Answer within 24 working hours.