Portal das Finanças: First Login and Registration Guide

• You need a NIF before you can register — the portal is built around it.
• Chave Móvel Digital gives instant access; an AT password by post takes 5-10 business days.
• Services are grouped by profile: individual, business (Categoria B/IRC), or non-resident.
• Every payment routes through a DUC (Multibanco reference), payable several ways including MB WAY.

www.portaldasfinancas.gov.pt is the Autoridade Tributária's (AT) official digital channel for filing returns, paying tax, checking your fiscal situation, and communicating with the tax authority. Almost everything else in the Portuguese tax system — Modelo 3, e-Fatura, IMI, opening activity — happens through it.

How to get set up

1. 1
   Get your NIF first

   The portal is built around your tax number — you can't register without one. See our NIF guide if you don't have one yet.

2. 2
   Choose how you'll log in

   An AT password (senha), Cartão de Cidadão with a reader or the Autenticação.gov app, or Chave Móvel Digital (CMD) — a phone number and PIN, no card reader needed.

3. 3
   Request your AT password, if that's your route

   Request it online at portaldasfinancas.gov.pt — it's mailed to your registered fiscal address, taking 5–10 business days. CMD gives you instant access instead, if you're eligible for it.

4. 4
   Log in and set your preferences

   Choose your preferred service language, and confirm your fiscal address is current — several deadlines (household confirmation, IRS notifications) depend on it.

5. 5
   Find the service for your situation

   The portal is organised by taxpayer profile — individual, business (Categoria B/IRC), or non-resident — each with a different set of core services.

What you can do, by profile

The portal's services are grouped by taxpayer type:

• Individual taxpayer: file Modelo 3, check assessments, opt into englobamento, confirm your household (by 15 February), validate e-Fatura invoices, pay IUC and IMI, request certificates, and enrol in IRS Jovem / NHR / IFICI.
• Business (Categoria B / IRC): declare início/alteração/cessação de atividade, file VAT returns and Modelo 30, submit Modelo 22 (annual IRC), file IES (by 15 July), submit DMR (by the 10th of each month), and manage e-Fatura/SAF-T reporting.
• Non-resident: file Modelo 21-RFI (double-tax treaty relief), Modelo 22-RFI and 23-RFI (refund claims), update your fiscal representative, and request tax-residency certificates.

Paying what you owe

The portal generates a DUC (Documento Único de Cobrança) with a Multibanco reference for any payment. You can pay via Multibanco, homebanking, MB WAY (up to €1,000), Payshop, CTT, or in person at a Serviço de Finanças — and IMI or IRS balances can be split into instalments through the same system.

Key dates worth bookmarking

• 15 February — confirm your household and fiscal address for the year
• 25 February — validate e-Fatura invoices
• 1 April – 30 June — the Modelo 3 filing window
• 31 July — pay any IRS still due