Portugal IRS Filing Deadlines 2026: Modelo 3 + Auto-IRS

Every Portuguese tax resident files an annual IRS declaration between April 1 and June 30. The system has two modes - Auto-IRS (a one-click pre-filled version that suits ~60% of filers) and the full Modelo 3 (the universal form that handles every situation). Most expats default-pick the wrong one for their situation.

This guide walks through both, explains when to choose which, and covers the parts that confuse first-time filers.

Who has to file

Situation	File required?
PT tax resident any part of the year	✅ Yes
Single source of income, employee, no extras, gross < €8,500	❌ Exempt (mínimo de existência)
Freelancer (any income)	✅ Yes
Mixed-source (Cat A + Cat B)	✅ Yes
Non-resident with PT-source income	✅ Yes (using Modelo 3 manually)
Just arrived in PT mid-year	✅ Yes - for the months you were resident

Married couples / unión de facto registered ≥2 years choose between joint filing (with the family quotient) or separate filing.

Auto-IRS vs Modelo 3 - which to use

Auto-IRS

A pre-filled declaration AT generates from data they already have:

• Salary from your employer’s monthly DMR
• Bank interest from PT bank reports
• Health, education, housing receipts auto-categorized via Portal e-Fatura
• Retentions already withheld

Right for you if all of the following are true:

• ✅ You have ONLY Cat A (employee) salary income
• ✅ All your e-Fatura receipts are correctly categorized
• ✅ You have NO foreign-source income
• ✅ You’re not claiming special deductions like court alimony, donations, or pre-2012 mortgage interest
• ✅ You’re not on NHR / IFICI

One-click: log in, review the pre-fill, accept. Done.

Modelo 3 (the full form)

Required if any of:

• ❌ You have Cat B (freelance) income - even €1 of it
• ❌ You have foreign-source income
• ❌ You’re on NHR / IFICI (file the Anexo L)
• ❌ You want to claim deductions e-Fatura missed
• ❌ You want to optimize joint vs separate filing
• ❌ You have rental income, capital gains, crypto

Most expats end up filing Modelo 3 because they have at least one foreign-source income line, freelance work, or NHR/IFICI status.

The Auto-IRS walkthrough (3 steps)

portaldasfinancas.gov.pt

Portal das Finanças NIF · 123 456 789

Cidadãos › IRS › Declaração 2026 › IRS Automático

IRS Automático - Resumo da declaração

Rendimento bruto Cat A

€42,000.00

Dedução específica

€4,587.09

Rendimento coletável

€37,412.91

IRS calculado

€8,943.16

Retenções já efectuadas

€9,840.00

Reembolso esperado

€896.84

Alterar Confirmar

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

Auto-IRS submission time

3 minutes

The full Modelo 3 walkthrough

This is the universal form. Has multiple Anexos (annexes) - you fill the ones relevant to your income types:

Anexo	What it’s for
Rosto (front page)	Personal info, marital status, dependents, residence
Anexo A	Cat A - employment income
Anexo B	Cat B - freelance / self-employment (simplified regime)
Anexo C	Cat B - organized accounting (above €200k)
Anexo E	Cat E - capital income (interest, dividends)
Anexo F	Cat F - rental income
Anexo G	Cat G - capital gains (real estate, securities)
Anexo H	Deductions à coleta + tax credits
Anexo J	Foreign-source income
Anexo L	NHR / IFICI status declaration

Fill Rosto + whatever Anexos apply. Most expat freelancers fill: Rosto + Anexo B + Anexo H. NHR holders also fill Anexo L.

portaldasfinancas.gov.pt

Portal das Finanças NIF · 123 456 789

IRS › Declaração Modelo 3 › Rosto

Rosto da Declaração - dados pessoais e Anexos

Estado civil

Casado(a) ▾

Tributação

Conjunta

NIF do cônjuge

234 567 890

Dependentes a cargo

2 dependentes

Anexo A (Cat A - emprego)

Selecionado

Anexo B (Cat B - atividade)

Selecionado

Anexo H (deduções)

Selecionado

Voltar Próximo: Anexo A

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

What happens after submission

Timeframe	What
Same day	Declaration filed. Provisional liquidação status: “Em apreciação” (under review).
2-4 weeks	AT processes. Most simple declarations clear quickly.
By July 31	Liquidação final published in your conta-corrente.
By August 31	Refund deposited (if owed) OR payment notice issued (if you owe).
September	If you owe, payment due via Multibanco reference or direct debit.

Missed the June 30 deadline? File anyway

The portal doesn’t lock. You submit the exact same Modelo 3 at Portal das Finanças - there’s no separate “late” form. What changes is the fine and the timeline.

The fine (coima)

Late filing is an infraction under Article 116.º of the RGIT: €150 to €3,750 for an individual. But the law rewards fixing it yourself before the tax office comes asking:

When you act	What you pay
Within 30 days of the deadline (by ~July 30), on your own initiative, before any AT notice	Reduced coima - in practice the €25 minimum (Art. 30.º + 26.º RGIT)
Later, but still before AT opens a case	Reduced tiers still possible - consumer bodies cite roughly €37.50-€112.50, though the exact figure depends on your case
After AT notifies you or during an inspection	The full €150-€3,750 range, no reduction

Two things people get wrong:

• The fine applies even if you owe nothing - or are owed a refund. It’s a penalty for the missing declaration, not for missing tax.
• The reduction is conditional on actually submitting AND paying the reduced coima within 30 days of being notified of it.

Your refund moves to the slow track

On-time filers get assessed by July 31 and refunded (or billed) by August 31. Late filers fall into a different legal timeline: assessment by November 30, refund or payment by December 31 (Art. 77.º and 97.º CIRS). Filing two weeks late can mean waiting four extra months for your refund - a bigger cost than the €25 for most people.

Couples: joint filing is off the table

The option for joint taxation had to be exercised by June 30. File late and AT treats you as separate filers by default - if the family quotient was saving you money, that saving is gone for this year.

If you never file at all

AT eventually issues an ex-officio assessment (liquidação oficiosa): it sends a registered letter giving you 30 days to comply, and after that assesses you on the income third parties reported - generally without your deductions, and with the default 0.75 coefficient if you’re a simplified-regime freelancer. It’s always a worse number than filing yourself. The oficiosa assessment lands by November 30.

Bottom line: if you missed June 30, file this week. Inside the 30-day window the realistic cost is €25 and a delayed refund. Outside it, the numbers only get worse.

Common mistakes that delay refunds

Wrong IBAN. AT can only refund to a Portuguese IBAN. If yours is foreign or outdated, you get a paper check that takes weeks longer.

Marital status doesn’t match civil registry. If you got married mid-year and the registry hasn’t communicated to AT, joint filing throws an error. Update at Conservatória, then refile.

Dependents not pre-registered. Each dependent needs to be registered on AT’s system before you file. If you list a child by NIF that isn’t in AT’s family-composition record, the deduction is rejected.

Missing the e-Fatura validation window. Receipts auto-categorize but ~10-15% land in the wrong category. If you don’t reclassify by February 25 of the year you’re filing for, AT keeps the wrong category for the IRS calculation. You can’t fix this in Modelo 3 - has to be done on e-Fatura before filing.

Foreign-source income missed on Anexo J. If you got even €100 of interest from a foreign bank, you need Anexo J. Skipping it triggers a multi-month review.

Special situations

First-year freelancer

If you opened activity in the year you’re filing for, Quadro 17 of Anexo B triggers the year-1 IRS coefficient reduction (50%). AT auto-applies this if eligibility is met (no Cat A, no prior activity in 5 years). See first-year guide.

Mid-year arrival in Portugal

If you became a tax resident mid-year, you only declare income from when you were resident. The form has a quadro for arrival/departure dates. Worldwide income from before residence date is NOT taxed in PT.

Just left Portugal

If you ceased PT residence during the year, file for the months you were resident. After ceasing residence, you only need to file for PT-source income going forward (Modelo 3 with Anexo J marker).

Couples with one PT resident, one non-resident

Complicated. The PT resident files alone in most cases. If both elect joint filing, both get treated as PT residents for the year - has implications for the non-resident’s tax obligations. Talk to a contabilista.

When to use a contabilista

DIY filing is fine for:

• Pure employees with simple deductions
• Freelancers in simplified regime, single source

Hire a contabilista if:

• You have foreign-source income across multiple countries
• You’re transitioning IN or OUT of NHR/IFICI
• You have capital gains on crypto, securities, or property
• You earn above €100k with mixed income types
• You have an audit notice from previous years

Typical fees: €100-€300 for a one-time filing, €40-€100/month for ongoing accounting if you’re a freelancer with regular needs.

Run your numbers first

Before you sit down with Modelo 3, run your scenario in the calculator - get a number you expect to see at the end of the form. If the AT-computed IRS comes out very different, something’s mis-categorized.

For most filers the calculator’s number matches AT’s to within ~€100 - the residual is usually rounding or a deduction we don’t yet model (couples with high individual deductions, foreign tax credits, etc.).

Sources

• Portal das Finanças - IRS Modelo 3
• CIRS - full code
• Doutor Finanças - Como entregar IRS
• RGIT Art. 116.º - coima for late declarations
• RGIT Art. 30.º - reduced coimas for voluntary regularization
• CIRS Art. 77.º and 97.º - assessment and refund deadlines