Portugal Tax Deadlines 2027: Everything You Need to File on Time

If you are a tax resident in Portugal, the annual tax return deadline is not the only date that matters.

Before the 2027 filing season begins, there are several steps that can affect your tax return, including checking invoices, updating your household information and reviewing the deductions recorded by the Portuguese Tax Authority.

The tax return submitted in 2027 generally covers income received between 1 January and 31 December 2026.

For international residents, preparation can be particularly important when income, investments, property or bank accounts are held outside Portugal.

Here are the key Portugal tax deadlines for 2027 and what you should prepare before filing.

Portugal Tax Deadlines 2027 at a Glance

Portugal’s annual personal income tax return is known locally as IRS. The standard filing period runs from 1 April to 30 June.

As of September 2026, the Portuguese Tax Authority has not yet published its complete operational calendar for 2027. This means some practical February deadlines should be confirmed once the official 2027 calendar is released.

15 February 2027: Certain Long Term Rental Communications

Property owners with qualifying long term residential rental agreements may need to communicate information about the duration or termination of those contracts to the Portuguese Tax Authority.

The standard deadline is 15 February.

This requirement is particularly relevant to landlords with permanent residential rental agreements lasting two years or more.

End of February 2027: Check Your e Fatura

One of the most important steps before filing your Portuguese tax return is reviewing your expenses in e-Fatura.

The Portuguese Tax Authority requires taxpayers to check and validate invoices relating to the previous year by the end of February.

You should check:

• whether any invoices are missing
• whether invoices require additional information
• whether expenses have been placed in the correct category
• whether invoices related to professional activity have been correctly identified
• whether expenses recorded under your NIF are accurate

This matters because qualifying expenses can affect the deductions available when your final tax liability is calculated.

If you are self-employed, it is also important to identify which expenses are related wholly or partly to your professional activity.

Because 28 February 2027 falls on a Sunday, taxpayers should confirm the final operational deadline once the Portuguese Tax Authority publishes its 2027 calendar.

End of February 2027: Update Your Household Information

Your household information should also be reviewed before filing season.

You may need to update your details if something changed during 2026, including:

• marriage
• divorce
• birth of a child
• death of a household member
• changes involving dependents
• shared custody arrangements
• changes to permanent residence

The information should reflect your position as of 31 December 2026.

If you do not update your household information, the Portuguese Tax Authority may rely on information already held from the previous tax year.

This can be particularly important for taxpayers whose tax return can be generated automatically.

Other Information That May Need to Be Reported by the End of February

Depending on your circumstances, there may be other information to communicate before filing.

For example, this can include:

• certain education expenses
• expenses connected with studying away from home
• qualifying rental costs related to moving permanent residence to certain areas
• foreign healthcare or education expenses in qualifying jurisdictions
• Modelo 44 for certain landlords who do not issue electronic rent receipts

The exact obligations depend on your personal situation.

16 to 31 March 2027: Check Your Tax Deductions

Once invoice information and data received from other organizations have been processed, taxpayers can review the deductions calculated by the Portuguese Tax Authority.

The standard review period runs from 16 to 31 March.

This gives you the opportunity to check expenses relating to areas such as:

• healthcare
• education
• housing
• general household expenses
• nursing homes
• certain VAT related deductions

It is worth checking this separately from e Fatura because some information is communicated directly to the Tax Authority by third parties.

This may include information from insurance companies, universities, banks or other organizations.

What if Your Tax Deductions Are Wrong?

The method for correcting a deduction depends on the type of expense.

For general household expenses and certain VAT related expenses, taxpayers can submit a complaint during the relevant March review period.

For categories including healthcare, education, property expenses and nursing homes, corrections can generally be made when completing the annual tax return through the relevant annex.

If you replace the values communicated to the Tax Authority, you should keep the documents that support the expenses you declare.

31 March 2027: Tax Allocation Deadline

Taxpayers can choose to allocate part of their Portuguese personal income tax to an eligible organization.

The advance selection can be made through the Portal das Finanças until the end of March.

This does not increase the amount of personal income tax you pay when you allocate the permitted percentage of the tax itself.

The rules are different if you choose to allocate the VAT deduction, which can affect the amount refunded or payable. This allocation can also be done on the tax return itself. 

1 April 2027: Tax Return Filing Season Opens

Portugal’s annual personal income tax filing period begins on:

1 April 2027

The return filed during this period generally covers income earned during 2026.

Returns must be submitted electronically through the Portal das Finanças.

The standard filing period runs from 1 April to 30 June.

30 June 2027: Portugal Tax Return Filing Deadline

The standard deadline for submitting your 2026 Portuguese personal income tax return is:

30 June 2027

This gives taxpayers three months to prepare and submit their return.

However, particularly for international taxpayers, it can be useful to start gathering information well before April.

Foreign tax documents, investment statements and information from overseas financial institutions may not always arrive at the same time as Portuguese documentation.

Who Needs to File a Portuguese Tax Return?

Whether you need to submit a Portuguese tax return depends on your tax status, income and any exemptions available under Portuguese law.

Not every person living in Portugal will necessarily have the same filing obligations.

However, Portuguese tax residents are generally subject to Portuguese personal income tax on their worldwide income.

This means that becoming a tax resident in Portugal can create reporting obligations beyond income earned inside Portugal.

International Residents and Foreign Income

For international residents, one of the most important parts of preparing a Portuguese tax return is identifying foreign income.

Portuguese tax residents must generally declare income obtained both in Portugal and abroad.

Foreign income can include:

• employment income
• pensions
• dividends
• interest
• rental income
• capital gains
• investment income
• business income
• professional income

Foreign income is generally reported through Annex J of the Portuguese personal income tax return.

Reporting foreign income does not automatically mean that the same income will be taxed twice.

Where applicable, foreign tax paid may be taken into account through Portugal’s international double taxation rules and relevant tax treaties.

Foreign Bank and Investment Accounts

Annex J is not only about income.

Portuguese tax residents may also have to identify certain bank or securities accounts held with financial institutions outside Portugal.

These accounts may need to be reported even when they have not generated taxable income during the year.

This can apply where the taxpayer is the account holder, beneficiary or authorized to operate the account.

This is one reason why international residents should review their financial arrangements before starting their Portuguese tax return.

What if Your Foreign Tax Is Not Final by 30 June?

Portugal has a specific rule for taxpayers receiving foreign income when the final tax due abroad has not yet been determined.

If the taxpayer is entitled to a foreign tax credit and the final amount of foreign tax cannot be established before the normal Portuguese filing deadline, the tax return filing deadline can, in certain circumstances, be extended until: 31 December 2027

However, this is not a general automatic extension.

The taxpayer must communicate the situation to the Portuguese Tax Authority within the normal filing period and identify the nature of the income and the country from which it originated.

This can be particularly relevant when another country’s tax calendar does not align with Portugal’s April to June filing period.

Automatic Tax Returns: Check Before You Confirm

Some taxpayers qualify for an automatically generated tax return.

The system uses information already available to the Portuguese Tax Authority to create a provisional return and tax calculation.

If the information is correct, the taxpayer can confirm the return.

However, it is still important to review the information before confirming it.

Check:

• income
• tax withheld
• deductions
• household information
• bank details
• applicable tax benefits

If the provisional return is incomplete or incorrect, you should not simply confirm it.

Instead, the correct tax return should be submitted within the normal filing period.

For taxpayers with foreign income or more complex international arrangements, additional reporting may be required.

Should You File as Soon as 1 April?

You do not have to submit your tax return as soon as the filing period opens.

In some cases, waiting until all the necessary information is available can be more sensible than filing immediately.

Before submitting, check that you have received all relevant documents and that pre filled information on the Portal das Finanças is accurate.

For international residents, this is especially relevant where income has been received in more than one country.

The objective should not simply be to file early. It should be to file correctly and within the deadline.

What Documents Should You Prepare?

Before filing your 2027 Portuguese tax return, consider gathering:

• Portuguese employment income statements
• pension statements
• self-employment records
• rental income information
• dividend statements
• interest statements
• brokerage and investment statements
• documents relating to the sale of investments
• documents relating to property sales
• cryptocurrency transaction records where relevant
• foreign income statements
• evidence of foreign taxes paid
• details of foreign bank accounts
• details of foreign securities accounts
• documents supporting deductible expenses
• information relating to applicable Portuguese tax benefits

The documents required will depend on your sources of income and personal circumstances.

31 August 2027: Refund or Tax Payment

For tax returns submitted within the normal filing period, the standard deadline associated with the refund or payment process is: 31 August 2027

The Portuguese Tax Authority may issue refunds earlier.

The exact timing depends on the return, the information submitted and whether additional checks are required.

If your tax assessment results in tax to pay, the standard payment deadline is generally 31 August where the assessment has been completed within the relevant legal period.

What Happens if You Miss the 30 June Deadline?

A late tax return can result in penalties and may delay any refund due.

The consequences will depend on factors including how late the return is submitted, whether tax remains payable and whether the taxpayer corrects the situation voluntarily.

If you realize that you have missed the deadline, it is generally better to regularize the position rather than leave the return outstanding.

The same applies if you discover after filing that income or other relevant information was omitted.

Depending on the circumstances, a replacement return may be required.

A Simple 2027 Tax Return Checklist

Before filing your Portuguese tax return:

1. Check your household information.
2. Review and validate your 2026 invoices.
3. Check your tax deductions in March.
4. Gather your Portuguese income documents.
5. Gather documents for any foreign income.
6. Check foreign bank and investment accounts.
7. Confirm the amount of foreign tax actually paid where relevant.
8. Review whether you need Annex J or other tax return annexes.
9. Check any applicable tax benefits or special regimes.
10. Review all pre filled information before submitting.
11. Submit your return by 30 June unless a specific legal extension applies.
12. Keep your supporting documents after filing.

Key Portugal Tax Dates to Save for 2027

15 February 2027

Certain long term rental communications.

End of February 2027

Check and validate e Fatura, update your household information and complete any other applicable pre filing communications.

16 to 31 March 2027

Review your tax deductions and correct qualifying discrepancies.

31 March 2027

Deadline for advance tax allocation.

1 April 2027

Portugal tax return filing season opens.

30 June 2027

Standard deadline for filing your 2026 Portuguese personal income tax return.

31 August 2027

Standard refund or payment deadline for returns submitted within the normal filing period.

31 December 2027

Possible extended tax return filing deadline for qualifying foreign income cases where the final foreign tax amount was not available by 30 June.

Preparing for the 2027 Tax Season

For many taxpayers, preparing a Portuguese tax return is relatively straightforward.

For international residents, the situation can become more complex when income, companies, investments, property or financial accounts are spread across different countries.

The most important thing is not to wait until 30 June to work out what needs to be reported.

Review your Portuguese information early, gather foreign documentation and identify any cross-border reporting issues before the filing deadline approaches.

The Portuguese Tax Authority is expected to publish its detailed 2027 tax calendar closer to the beginning of the year. Any operational deadline that has not yet been formally confirmed should therefore be checked against the final 2027 calendar.