Many expatriates living in Portugal face the same problem every year: the Portuguese IRS filing deadline arrives before their foreign tax information is finalized.
This is particularly common for taxpayers receiving income from the United States, Canada, the United Kingdom, Australia, Germany, the Netherlands, and other countries where tax returns, assessments, or tax certificates are often issued after Portugal’s standard filing deadline.
What many taxpayers do not realize is that Portuguese tax law contains a little-known provision that may allow them to postpone the submission of their Portuguese tax return until 31 December.
Understanding this rule can help avoid errors, unnecessary amendments, and potential disputes with the Portuguese Tax Authority.
Can You Extend the Portuguese Tax Return Deadline?
Yes.
Article 60(3) of the Portuguese Personal Income Tax Code (CIRS) allows certain taxpayers with foreign income to benefit from an extended filing deadline.
The extension is specifically designed for situations where the taxpayer is entitled to claim relief from international double taxation, but the amount of foreign tax paid is not yet known by the normal filing deadline.
In these circumstances, the deadline for filing the Portuguese Modelo 3 tax return may be extended from 30 June to 31 December.
Who Can Benefit From This Extension?
The extension may apply to Portuguese tax residents who receive foreign-source income and intend to claim a foreign tax credit in Portugal.
Typical examples include:
- US citizens and Green Card holders living in Portugal
- British retirees receiving UK pension income
- Canadian residents receiving investment income
- Dutch pension recipients
- Foreign property owners receiving rental income abroad
- Investors earning foreign dividends and interest
- Taxpayers reporting foreign capital gains
The Three Legal Requirements
To qualify for the extension, three conditions generally need to be met.
1. You Receive Foreign Income
The income must originate outside Portugal and be reportable in the Portuguese tax return.
Common examples include:
- Foreign pensions
- Social Security benefits
- Employment income
- Self-employment income
- Dividends
- Interest
- Rental income
- Capital gains
2. You Are Entitled to Double Tax Relief
The extension only applies when the taxpayer is entitled to claim a foreign tax credit under Article 81 of the CIRS.
This usually means that:
- Tax has been paid or may be payable in the source country; and
- Portugal must provide relief to prevent double taxation.
This is particularly relevant where a Double Tax Treaty exists between Portugal and the source country.
3. The Foreign Tax Amount Is Not Yet Determined
This is the most important requirement.
The law does not merely refer to missing foreign income information.
Instead, it specifically requires that the amount of foreign tax available for credit in Portugal has not yet been determined.
Examples include:
- The foreign tax return has not yet been filed.
- The foreign tax assessment has not yet been issued.
- Final withholding tax certificates are unavailable.
- Foreign accountants are still preparing the return.
- The taxpayer is awaiting confirmation of foreign tax paid.
This distinction is crucial because many taxpayers incorrectly assume that any delay in obtaining foreign information automatically qualifies them for the extension.
How to Notify the Portuguese Tax Authority
The extension is not automatic.
Article 60(4) of the CIRS requires taxpayers to notify the Portuguese Tax Authority (Autoridade Tributária e Aduaneira) before the normal filing deadline expires.
The notification must generally include:
- The type of foreign income received.
- The source country.
- Confirmation that the foreign tax amount has not yet been determined.
- Confirmation that the taxpayer expects to claim a foreign tax credit.
Notification Deadline
The communication must be submitted by 30 June.
Missing this deadline may prevent the taxpayer from relying on the extended filing period.
New Filing Deadline: 31 December
Once the notification has been properly submitted, the taxpayer may file the Portuguese tax return once the foreign tax information becomes available.
The filing deadline is extended until:
31 December of the same year
This provides an additional six months to obtain foreign tax documents and accurately calculate any available foreign tax credits.
Why Filing Too Early Can Be Risky
Many taxpayers submit their Portuguese tax returns before receiving their final foreign tax information.
This often leads to:
- Incorrect foreign tax credits
- Overpayment of Portuguese tax
- Amendments to the tax return
- Delays in tax assessments
- Additional correspondence with the Tax Authority
In many cases, using the Article 60 extension can be the safer and more efficient approach.
Common Examples We See at GoalSeek
The extension is particularly useful for:
US Expats in Portugal
Many Americans finalize their US federal tax return after the Portuguese filing season has already begun. The final foreign tax credit position is often not known by June.
Canadian Residents in Portugal
Canadian tax slips and assessments may be issued after the Portuguese deadline, making it difficult to calculate foreign tax credits accurately.
International Investors
Taxpayers receiving dividends, interest, or capital gains from multiple countries frequently experience delays in receiving final tax certificates.
Retirees Receiving Foreign Pensions
Where foreign tax withholding needs to be confirmed before claiming relief in Portugal, the extension can provide valuable additional time.
Final Thoughts
Article 60 of the Portuguese Personal Income Tax Code provides an important compliance tool for taxpayers with international income.
However, the extension is not available simply because foreign information is missing. The legislation specifically requires that the foreign tax credit amount remains undetermined and that the taxpayer is entitled to claim relief from double taxation.
For many expatriates, retirees, investors, and internationally mobile professionals, understanding this distinction can prevent costly filing mistakes and unnecessary amendments.
If you receive foreign income and are unsure whether you qualify for the extended filing deadline, professional advice should be obtained before the standard 30 June deadline expires.
How GoalSeek Can Help
GoalSeek specialises in Portuguese taxation for expatriates, international investors, retirees, freelancers, and cross-border families.
We assist clients with:
- Portuguese IRS tax returns
- Foreign income reporting
- Double taxation relief claims
- US–Portugal tax coordination
- UK–Portugal tax planning
- Canadian–Portugal tax matters
- NHR and IFICI regimes
- International tax compliance
If you are unsure whether Article 60 applies to your situation, contact GoalSeek for a professional assessment before filing your Portuguese tax return.
Disclaimer: This article is for general informational purposes only and does not constitute legal or tax advice. Tax treatment depends on the specific facts of each case and should be reviewed individually.
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