Short answer
You may need to file Portuguese IRS if Portugal treats you as tax resident, if you had Portugal-source income as a non-resident, or if your situation requires a Modelo 3 declaration to report income, deductions, household details, or special tax treatment. The exact annexes depend on what happened during the tax year.
What should I check first?
- Tax residence: residents normally review worldwide income. Non-residents normally focus on Portugal-source income.
- Income categories: salary, pension, self-employment, rental income, investments, capital gains, and foreign income point to different annexes.
- Foreign accounts: foreign bank, deposit, securities, or brokerage accounts can create Anexo J questions even without much income.
- Deductions and benefits: many Portuguese expenses are pre-filled, but some deductions or benefits can still make Anexo H relevant.
- Special regimes: NHR or IFICI can change how income is taxed, not whether the income needs to be reviewed.
Which annexes does this usually point to?
Everyone starts from the Modelo 3 declaration. The annexes then describe the type of income or treatment: Anexo A for Portuguese employment or pension income, Anexo B for self-employment, Anexo F for rental income, Anexo G or G1 for certain gains, Anexo H for deductions and benefits, Anexo J for foreign income and accounts, and Anexo L for special resident regime treatment.
The Simples quiz asks routing questions only: what kinds of income, accounts, household details, and regimes apply. It does not need your salary, IBAN, NIF, or exact amounts to produce the annex checklist.
What is usually pre-filled?
Portuguese salary, pension, withholding, social security, and many e-Fatura expenses may already appear in Portal das Financas. That does not mean the return is complete. Pre-filled data can miss foreign income, foreign accounts, special regime treatment, or facts that are not automatically known to the tax portal.
Common mistakes
- Assuming "I paid tax abroad" means the income is irrelevant in Portugal.
- Ignoring a foreign brokerage account because it did not generate much income.
- Using NHR as a reason not to report income, instead of checking the correct treatment.
- Submitting pre-filled data without checking whether all annexes are present.
FAQ
Do Portuguese residents report worldwide income?
Usually yes. If you are tax resident in Portugal, foreign income and accounts should be reviewed as part of the annual IRS filing route.
Does pre-filled data mean I do not need to review the return?
No. Treat pre-filled data as a starting point. You still need to check whether the right annexes and facts are included.
Can a non-resident still need to file in Portugal?
Yes. Non-residents may need to file when they have Portugal-source income that must be declared.