Serviços Portugal
Taxes

Portal das Finanças (Tax Authority Portal)

Submit your IRS tax return, check tax debts, pay taxes and access your tax status through the official Tax Authority portal.

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What you need before you start

  • NIF (Tax Identification Number / Número de Identificação Fiscal)
  • Portal das Finanças access password
  • Or Chave Móvel Digital (CMD / Digital Mobile Key)
  • Or Cartão de Cidadão (Citizen Card) with card reader

Step by step

  1. Go to www.portaldasfinancas.gov.pt

  2. Click 'Autenticar' (Sign in) in the top right corner

  3. Enter your NIF and access password (or use CMD)

  4. In the main menu, select the desired area (e.g. 'Cidadãos' / Citizens)

  5. For IRS tax return: click 'IRS' then 'Entregar Declaração' (Submit Return)

  6. Review the pre-filled data or make any necessary corrections

  7. Submit the return and save the confirmation receipt

Tip: If in doubt, always contact the official service directly.

Editorial review

Useful context before opening the official portal

This section highlights the practical details that usually cause mistakes or delays. For the final decision, always confirm the official source.

Last reviewed: March 28, 2026

Official sources checked
Typical processing time

Portal access is immediate after sign-in. IRS submissions are normally confirmed right after you submit them.

Costs and official fees

There is no fee to access the portal itself. Any amount due depends on the tax, fine or filing obligation involved.

Mistakes worth avoiding
  • Submitting for the wrong tax year or accepting pre-filled IRS data without reviewing it.
  • Leaving the portal without saving the submission or payment receipt.
  • Trying an outdated password when Digital Mobile Key already works for your account.
Frequently asked questions

Can I sign in with Digital Mobile Key?

Yes. Portal das Financas accepts CMD, and for many users it is the fastest way to log in without relying on an older password.

Is automatic IRS safe to approve without checking?

No. Always review dependants, deductions, bank details and the selected tax regime before confirming the declaration.

Help us keep this guide accurate

If you notice a change on the official portal, send us a correction so we can review this guide quickly. Portal das Finanças (Tax Authority Portal)

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