US Expat Tax Services in Portugal
US expat tax services in Portugal help US-connected taxpayers assess their Portuguese residence position alongside their US filing obligations. We review residence under Article 16 of the CIRS and identify which article of the 1994 US-Portugal treaty applies to each agreed income or gain.
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Who Needs US Expat Tax Services in Portugal
- You are a US-connected taxpayer living in Portugal and need your Portuguese residence position reviewed.
- You have income or gains connected with both countries and need the relevant treaty and domestic provisions identified.
- You hold Portuguese or other non-US financial accounts and need the US information-reporting questions reviewed.
- You need Portuguese and US filing work mapped for the same income, assets and tax periods.
You need only US domestic tax work with no Portuguese residence, income, asset, account or filing connection; your case falls outside this Portugal engagement.
What's Included in US Expat Tax Support
You get a quote in writing before any work starts.
- Portuguese residence analysis. A certified accountant reviews your position under Article 16 of the CIRS.
- US filing review. A certified accountant identifies the US return questions that require IRS and taxpayer-specific analysis.
- Treaty analysis. A certified accountant identifies the applicable US-Portugal treaty article for each agreed income or gain.
- US information-reporting review. A certified accountant maps the foreign-account, asset and entity facts that require IRS analysis.
- Portuguese gains analysis. A certified accountant reviews relevant disposals under Article 10 of the CIRS.
- Dual filing support. A certified accountant prepares the agreed Portuguese work and maps the US records and dates for the relevant period.
What You'll Need to Provide
- Citizenship and residence timeline
- Your citizenship or status, dates in each country, homes, household facts and Portuguese tax registration.
- Income schedule
- Employment, pension, investment, rental, business and other income by country and tax year.
- Account and asset inventory
- Relevant financial accounts, investments, entity interests and other assets held outside the United States.
- Tax and withholding records
- US and Portuguese assessments, withholding statements, payment evidence and notices.
- Disposal records
- Purchase, improvement, valuation, sale and transaction-cost documents for relevant assets.
- Prior filings
- US and Portuguese returns, information reports and correspondence for the periods under review.
How US Expat Tax Work Is Handled in Portugal
A certified accountant handles the filings the engagement requires and flags treaty, double-tax, account-reporting, gains and wealth-planning questions along the way.
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Portuguese residence review
A certified accountant maps your presence, homes and household facts against Article 16 of the CIRS.
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US filing and reporting inventory
A certified accountant identifies the returns, accounts, assets and entity interests that need IRS review.
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Income and gains classification
A certified accountant separates each amount by category, source, payment date and relevant tax period.
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US-Portugal treaty analysis
A certified accountant identifies the treaty article relevant to each agreed income or gain.
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Portuguese tax work
A certified accountant applies the verified residence and gains rules to the agreed Portuguese calculation and filing.
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Dual-calendar filing map
The agreed Portuguese work and the US filing information that requires IRS review are mapped.
Timing and Possible Delays
Set by the residence facts and filing periods
The work is planned around your residence history, income, accounts, assets, disposals and relevant Portuguese and US filing periods.
What delays it
The work takes longer when travel dates, account records, income statements, acquisition costs, tax payments or prior returns are incomplete.
What to prepare now
You gather your citizenship, residence, income, account, asset, tax-payment and prior-filing records before the work begins.
Residence Evidence, Account Records and Dual Filing
Residence file for a dual-country review
You keep a dated travel calendar, home records, household evidence and Portuguese tax registrations for every period under review. A certified accountant uses that file to test residence without treating a mailing address as the complete position.
Account and entity records for US reporting
You identify each relevant account, asset and entity interest by owner, institution, country, currency and reporting period. A certified accountant can then connect the documented holding to the IRS question that needs analysis.
Reconciliation across two filing calendars
You keep each income statement, withholding record, assessment and payment receipt with the return period to which it belongs. A certified accountant reconciles the currencies and tax periods before preparing the agreed Portuguese work and mapping the related US information.
Set out your US-Portugal tax position
Describe where you lived, what income and assets you hold, which accounts are relevant and which returns have been filed.
Common questions
Do US filing obligations require an individual review after a move to Portugal?
Which US-Portugal treaty document applies?
How is Portuguese tax residence determined?
Does the treaty apply identically to every income category?
Do foreign accounts and assets create US reporting questions?
How are Portuguese capital gains reviewed?
When is a US return generally due?
Which Portuguese filing date applies?
Which documents support a US expat tax review?
How is US expat tax work handled?
What to Expect From the Service
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One team for the whole case.
The residence, treaty, income, gains, account-reporting and filing questions all run through one team.
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English or Portuguese.
English or Portuguese, whichever you are most comfortable in.
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A quote in writing before work starts.
You get a quote in writing before any work starts. You are told plainly if a case falls outside the service.
What clients say about working with our founding team
Reviews from clients who worked with our founding team at their previous firm.
1–3 of 13
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Samuel T. Google review, c. 2024 “I decided to partner with [the firm] for the establishment of multiple subsidiary companies in different jurisdictions. The entire process was streamlined and I felt well-supported throughout. I continue to collaborate with them in these countries and would highly recommend their services!”
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Joseph V. Google review, c. 2016 “Our company has used the services of [the firm] for the purpose of conducting a thorough Due Diligence on a number of mining titles, the preparation of complicated, cross jurisdictional purchase contracts as well as the incorporation of a local subsidiary... All work was completed to a high standard, on budget and on time.”
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Joe M. Google review, c. 2022 “Expanding our operations in Colombia has been challenging to say the least... Their years of experience, professionalism and most importantly their patience(!) have been vital to our success... [They] honestly feel like an extension of our team.”
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Amy D. Google review, c. 2019 “The team at [the firm's Ecuador office] has helped streamline our accounting and other administrative tasks flawlessly between two countries and between staff and vendors in multiple locations... Highly recommended.”
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Kunal D. Google review, c. 2022 “[The founder and the team] have always demonstrated a prudent, distinct and rapid ways of resolving issues and can tailor the needs as per our requirements... Their quick and error free approach has been instrumental.”
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Julian A. Google review, c. 2022 “I emailed them and it was not more than a couple of hours when they emailed me back... I cannot be more satisfied with how [the firm] handled the process of registering my business in the country.”
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George T. Google review, c. 2016 “The team is knowledgable, experienced and extremely professional, whilst being very approachable and friendly. If you want to do business in Mexico, there is no one better, in my opinion.”
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Priscila O. Google review, c. 2024 “The group is fantastic! Contact [the founder] and the group if you require assistance with the incorporation of your small business!!!”
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Christopher W. Google review, c. 2015 “I was pleased to find all the staff that worked with us to be not only attentive and responsive, but aware of our specific needs. Although we were unable to proceed due to our own financial situation, it did not stop [the firm], and more specifically... [the founder], from trying to find ways to make the effort work.”
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Hassan J. Google review, c. 2024 “Very much appreciated the opportunity to speak directly with [the founder] when I reached out. The information provided was clear and in contact. Highly recommended!!!”
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Simon T. Google review, c. 2020 “A great service. Very efficient. [The founder] was professional and organised everything we needed”
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Janete C. Google review, c. 2024 “Thanks for everything... An excellent experience and highly recommended!!!”
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Sean W. Google review, c. 2025 “[The founder] and Team [at the firm] provided our company quick, accurate & relevant advice to our company for a proposal in Costa Rica. Recommend their services to anyone...”
Text in [brackets] replaces names used in the reviews. The original reviews are on Google.
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Every request is read in house. The requirements are assessed, and a reply by email sets out the appropriate next steps.
Every enquiry is read in house, and the aim is a reply within one business day.
The information on this page is checked against official sources and reviewed regularly. It is corrected when the law or official guidance changes, as the Editorial Standards describe.