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PortugalPublic sector2020 – ongoing

Tax and Customs Authority

cATia taxpayer-service chatbot

Portugal's tax authority said cATia resolved queries for over 87% of its users without staff assistance

WorkingCompany's own claimOfficial ↗

Problem

Taxpayers needed accessible explanations of tax matters outside office visits and staffed service hours.

Approach

The authority launched cATia in May 2020 and developed it further during its open-government action plan. It used interaction statistics and satisfaction surveys to adjust the service. A later authority presentation identified its deployed taxpayer chatbot as an AI system with escalation to human agents.

Results

over 87%share of cATia users whose queries were resolved without staff assistance by August 2023, according to authority representativesCompany's own claim[1]
close to 30,000taxpayers who accessed cATia by August 2023, according to authority representativesCompany's own claim[1]

Takeaway

The authority reported substantial self-service resolution. The open-government review found no evidence yet of improved tax compliance or reduced litigation.

Categories

Business function
Customer service
Innovation type
Process innovation
Evidence
Company's own claim

Sources

  1. Virtual Assistance in Tax Portal (PT0010)
    Open Government Partnership2024Research paper or report
  2. AI Chatbot for Taxpayer Service
    Tax and Customs Authority26 Mar 2025Company publication

Source summaries

[1]Open Government Partnership2024

The review reported authority representatives' figures of close to 30,000 users and over 87% resolving queries without staff assistance. It found no evidence yet of improved compliance or reduced litigation.

[2]Tax and Customs Authority26 Mar 2025

The authority described its deployed AI chatbot on Portal das Finanças. It explained escalation to human agents through 3CX and monitoring of interactions.

Full details are in the original sources.

Added 1 Nov 2026 · Updated 1 Nov 2026
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