How to Update Your Fiscal Address in Portugal (Mudança de Morada Fiscal)

If you move within Portugal - even within the same city - you need to update your morada fiscal (fiscal address) at Portal das Finanças. The address registered with AT is used for all official mail (IRS notices, IUC bills, certidões), all SEPA correspondence, and all eligibility checks for things like NHR district-specific rules and IMI calculation.

The whole update takes 5 minutes online and is free. This guide walks through it.

Why this matters more than people realize

The fiscal address determines:

• Where AT mails your senha if you ever request a new one
• Where IRS payment notices arrive if you owe
• Which Repartição de Finanças is your local office (matters for in-person help)
• IMI calculation is partly based on parish (freguesia)
• Eligibility for some local benefits (e.g., interior-region tax incentives)
• Residency continuity for citizenship applications

Address mismatches between AT, AIMA (residency authority), and your bank are a common cause of bureaucratic friction during permit renewals.

When you don’t need to update

• Short-term travel (vacation, work trip under 3 months) - no update needed
• Living between two PT addresses - pick one as primary fiscal address; update if the primary changes
• Moving abroad - different process: declare emigration via Anexo J on next IRS, request “alteração de residência fiscal para o estrangeiro”

For a domestic move within Portugal, this guide applies.

The walkthrough

portaldasfinancas.gov.pt

Portal das Finanças NIF · 123 456 789

Cidadãos › Identificação › Dados Pessoais Relevantes

Alterar morada fiscal

Tipo de morada

Morada permanente em Portugal

Código postal

1100-000

Localidade

Lisboa

Rua / Avenida

Av. da Liberdade

Número de porta

100

Andar / Fração

3.º Esq.

Data de início da nova morada

01-04-2026

Cancelar Confirmar alteração

Schematic - actual UI may differ. Illustrates layout, not exact pixels.

What happens next

Surface	When updated
Portal das Finanças	Immediate
Future AT mail	Goes to new address from confirmation date
In-flight mail (already sent)	Forwarded by Correios to your old address until you set up forwarding
IRS Modelo 3 next year	Auto-pulls new address
Certidões de não dívida	Show new address from update date forward
AIMA residency permit	Does NOT auto-update - separate process at AIMA
Your bank, utilities, employer	Don’t auto-update - you must inform each separately

Setting up Correios mail forwarding

If you’re worried about mail in-flight (especially senha re-issuance, IRS notices) during the transition, set up redirecionamento de correspondência with CTT:

• Visit any CTT post office, or ctt.pt → Particulares → Redirecionamento
• Choose 1, 3, or 6-month forwarding period
• Pay €15-€40 depending on duration
• All mail addressed to your old address gets forwarded to the new one

Useful as a 30-day safety net.

Common mistakes

Forgetting Segurança Social. Updating only AT means AT mail goes to the new address but SS continues to mail to the old one. Update both same-day.

Wrong postal code. AT pre-fills locality based on postal code; if the postal code is wrong, the locality is wrong. Double-check from your CTT-issued correspondence (utility bill at the new address, if you have one).

Updating before actually moving. AT lets you set a future “data de início” but if you set it BEFORE you actually move, you’ll be officially registered at an address you don’t yet occupy. Doesn’t usually matter but technically wrong.

Not updating bank/utilities. AT update doesn’t propagate to private institutions. Update your bank, energy provider, water company, internet, mobile phone, and employer separately. Easy to miss one for months.

Forgetting AIMA. If you have a residency permit (TR, Golden Visa, D7, D8), the address on it must also be updated at AIMA. Separate process, more bureaucratic. Plan to do this within 60 days of moving.

Sources

• Portal das Finanças - Comunicação de morada
• Segurança Social Direta - Alterar morada
• CIRS art. 19 - Domicílio fiscal
• CTT - Redirecionamento de correspondência