Tax Return Portugal 2026: Deadline and How to File

IRS 2026 deadline: key dates at a glance

These dates apply to all tax-resident individuals filing their Modelo 3 IRS return for the 2025 tax year. Missing the 30 June deadline results in an automatic penalty — even if no tax is owed.

Who must file an IRS return in Portugal?

You are required to file if, during 2025, you were a Portuguese tax resident and you received:

• Employment income (Category A) — even if your employer withheld tax at source
• Business or self-employment income (Category B / recibos verdes)
• Rental income (Category F)
• Investment income — dividends, interest, capital gains (Categories E & G) — unless already subject to final withholding tax at a flat 28% rate and you do not wish to aggregate
• Pension income (Category H)

You are a tax resident if you spent more than 183 days in Portugal in 2025, or if you maintained a habitual residence here on 31 December 2025.

Married couples or de facto partners may choose to file jointly (tributação conjunta) or separately. Filing jointly is usually advantageous when one partner earns significantly less.

IRS Automático — the simplified pre-filled return

Introduced progressively and expanded under Decreto Regulamentar 5-A/2026, IRS Automático allows eligible taxpayers to validate a pre-filled return rather than completing the form manually. AT cross-references your employment records, bank data, and registered deductions.

You are eligible for IRS Automático if:

• You have only employment or pension income (Category A or H)
• You have no foreign income to declare
• Your employer submitted all required reports to AT (DMR)

If AT presents you with an IRS Automático proposal, you can accept it (one click, done), reject it and file a full return manually, or simply let the deadline pass (not recommended — this is treated as non-filing).

Self-employed workers, landlords, and taxpayers with foreign income are not currently eligible for IRS Automático and must complete the full Modelo 3.

How to file your IRS return: step-by-step

1. Get access to Portal das Finanças. You need your NIF and AT password, or your Chave Móvel Digital (CMD). If you do not have a CMD, you can activate one at any Finanças office or online via Autenticação.gov.pt.
2. Log in at portaldasfinancas.gov.pt. Navigate to Cidadãos → Entregar → IRS → Declaração de IRS.
3. Select the tax year 2025 and choose whether you are filing individually or jointly.
4. Complete the annexes. Annex A (employment income), Annex B (self-employment), Annex F (rental income), etc. AT pre-fills some fields automatically.
5. Enter your deductions. Health expenses (collected via e-fatura), education, housing loan interest, pensions paid to dependants, and charitable donations are the most common.
6. Simulate and submit. Use the simulation tool to check whether you owe tax or are owed a refund, then submit.
7. Keep the submission receipt (comprovativo). This is your proof of filing.

IRS tax brackets 2026 (income earned in 2025)

Portugal uses a progressive system. Your effective rate is lower than the marginal rate because each bracket only applies to the income within that range.

Expats in Portugal: IFICI / NHR regime

If you moved to Portugal recently and registered under the IFICI regime (which replaced NHR in January 2024), your Portuguese-source employment and self-employment income may be taxed at a flat 20% rate for up to 10 years, rather than at progressive IRS rates.

Foreign-source income may be exempt from Portuguese IRS under IFICI, depending on the type of income and the country of origin.

You must declare your IFICI status on your IRS return and include the relevant annex. Incorrect filing can result in losing the benefit for that year.

Read the full guide: IFICI / NHR Replacement — Complete Guide for New Residents →

Thinking of setting up a company in Portugal as an expat? How to open a company in Portugal as a foreigner →

Penalties for late or missing IRS filing

Do not ignore the deadline. The Portuguese Tax Authority applies automatic penalties for late filing:

• Filed within 30 days after deadline: penalty reduced to €25
• Filed 31–90 days late: penalty between €200 and €600
• Filed more than 90 days late: penalty between €200 and €2,500
• Never filed (omissão): AT may issue an assessed return (liquidação de ofício), usually less favourable than self-reported figures, plus maximum penalties

If you owe tax and file late, interest (juros compensatórios) accrues at 4% per year from the payment due date.

Documents you need to file your Portuguese tax return

• NIF (Número de Identificação Fiscal) — your Portuguese tax number
• AT password or Chave Móvel Digital credentials
• Annual employment income statement from your employer (declaração anual de remunerações)
• Bank statements for investment income (dividends, interest, capital gains)
• Rental income records (lease contracts, receipts issued via Portal das Finanças)
• Health and education expense receipts (usually pre-loaded from e-fatura)
• Housing loan statement showing interest paid in 2025 (if applicable)
• Any foreign income documents — payslips, foreign tax returns, double taxation certificates

Frequently asked questions

What is the IRS deadline in Portugal 2026?

The IRS filing deadline for the 2025 tax year is 30 June 2026. The filing window opened on 1 April 2026.

Do expats living in Portugal need to file a tax return?

Yes. All tax residents must file, including expats. If you spent more than 183 days in Portugal in 2025 or maintained a habitual residence here, you are a tax resident and must declare all worldwide income.

What is IRS Automático?

IRS Automático is a pre-filled, simplified return offered by AT for taxpayers with only employment or pension income. Eligible taxpayers can confirm the return with a single click. Expanded under Decreto Regulamentar 5-A/2026.

What documents do I need to file IRS in Portugal?

Your NIF, AT password or CMD, annual income statement from employer, bank statements for investment income, health and education receipts, and any foreign income documentation.

What happens if I miss the IRS deadline?

Penalties range from €25 (if filed within 30 days) to €2,500 for very late filing. Interest also applies on any tax owed. File as soon as possible — do not ignore the missed deadline.

Do I need to declare foreign income in Portugal?

Yes. Tax residents must declare worldwide income. Double taxation treaties may reduce or eliminate Portuguese tax on income already taxed abroad, but the income must still be reported.

Related guides

• Portugal Tax for Foreigners 2026 — Complete Guide — tax residency, IFICI regime, IRS rates, fiscal representation, capital gains
• IFICI / NHR 2.0 Tax Regime Explained
• NIF Portugal — How to Get Your Tax Number