US Citizens: LLCs & Cross-Border Tax
Moving to Madeira does not end your relationship with the IRS.
The United States taxes its citizens on worldwide income wherever they live, so from your first resident year your returns travel in pairs: a Portuguese filing and an American one, each with its own logic, and a set of credits and treaty rules deciding how much tax survives in total.
Why are Americans a special case, and what does that change?
Citizenship-based taxation makes the planning question different from every other nationality on this site. A German or Canadian who becomes a Portuguese tax resident largely swaps one tax home for another; an American adds one.
Every Portuguese choice you make (the IFICI regime, how you draw income, what you invest in, whether your business lives in an LLC or a Portuguese company) has a shadow answer on the US return, through the foreign tax credit, the earned income exclusion and the treaty.
The planning discipline that follows is simple to state and decisive in effect: no Portuguese decision is final until its US consequence has been priced. That is how we work, in standing coordination with US CPAs and enrolled agents; we prepare and defend the Portuguese side and the structure, and we do not prepare US federal returns, which is exactly the division your file wants.
IFICI for Americans: the 20% rate and the credit mechanics
The IFICI regime (the successor to the NHR, covered in full on its own page) offers eligible professionals a 20% Portuguese rate on qualifying employment and self-employment income, with a registration deadline that does not wait for your US extension. For Americans the analysis has a second stage: US tax still applies, and the interaction between the Portuguese 20%, the foreign tax credit and the exclusion determines your true combined rate.
The result is usually favourable and occasionally surprising in both directions, which is why we model the stack before you rely on it, income line by income line. The arrival-year timing (Portuguese split-year facts against the US calendar year, state exit included) is handled with the First Tax Year work; Americans leaving high-tax states have one extra departure to plan, because some states are slower to let go than the federal government.
Thousands of American professionals arrive owning a US LLC, and the first Portuguese question is characterisation: what is this entity for Portuguese tax purposes, and how are its distributions taxed in the hands of a Portuguese resident? The answer is not intuitive and has been addressed in Portuguese administrative rulings, applied case by case to the specific LLC’s features; in the configurations most common among independent professionals, distributions have been treated as investment income of the member rather than as transparent business income, with everything that follows for rates, credits and IFICI eligibility.
The practical consequences are real: whether to keep the LLC, restructure how you are paid by it, or interpose or substitute a Portuguese vehicle is a design decision with a materially different tax bill in each direction. We analyse the LLC you actually have (operating agreement, election history, activity) rather than the LLC of the blog posts, and our full technical article on the subject is linked for the long version.
Two traps define investing for Americans in Europe, and they point in opposite directions. The PFIC trap: most European funds and ETFs (including ordinary Portuguese and UCITS funds) are passive foreign investment companies to the IRS, taxed under a punitive default regime with heavy annual reporting; the golden visa fund route has this problem in concentrated form, as our guide explains.
The access trap: EU rules make it difficult for European brokers to sell US-domiciled ETFs to residents, so the simple answer of keeping everything American needs the right custody arrangements to survive your change of residence. Between the two sits a genuinely plannable space (US-domiciled assets held through the right accounts, direct securities, and fund structures that support the elections your US adviser needs), and one rule we repeat until it sticks: for an American, no European investment product is bought before its US tax character is known.
We are not investment advisers and sell no products; our work is the tax character, the Portuguese treatment and the coordination with your US side before the money moves.
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MCS
US Citizens: LLCs & Cross-Border Tax
Your American retirement accounts move to Madeira with you, and Portugal has its own opinion about them. Distributions from traditional IRAs and 401(k)s are generally within the Portuguese net once you are resident, with the treaty and credits deciding where the tax lands; the characterisation of each account and each kind of distribution deserves case-by-case care rather than assumption.
The sharpest edge is the Roth mismatch: the US-side exemption of qualified Roth distributions is an American concept that Portuguese law does not automatically mirror, so the tax-free pillar of many American retirement plans may not be tax-free here. None of this argues against the move; all of it argues for sequencing (what to convert, draw or defer, and when, relative to your residence date), which is precisely the kind of one-time planning that pays for itself for years.
Life in Madeira adds Portuguese reporting without removing American reporting. On the US side: the FBAR for foreign accounts once their aggregate value crosses the threshold, FATCA reporting at higher thresholds, PFIC forms where relevant, and the LLC’s own filings.
On the Portuguese side: the annual return with foreign income annexes and the disclosure of foreign account identifiers, as covered on our Personal Income Tax Compliance page. The two stacks describe the same life to two governments that exchange information automatically, which is why they must be consistent with each other, not merely each internally correct. In our engagements, the Portuguese filing is prepared after the US filing is completed as definitive and final, as per Portuguese tax law.
How do we work with Americans and with your US adviser?
What we do:
Portuguese tax residence and IFICI work
The LLC and structure analysis
The Portuguese treatment of your income
Investments and retirement accounts
The annual Portuguese compliance
The arrival sequencing
All in English, from Funchal, where MCS has worked with international clients since 1995.
What we deliberately do not do: Prepare US federal or state returns.
Americans are best served by a pair of specialists in standing contact, and we work that way as a matter of course, with your existing CPA. If your spouse is an EU citizen, their simpler path is on our EU citizens page; the household plan covers both.
Frequently asked questions about US Citizens in Portugal (or Madeira Island)
Do US citizens still file American taxes after moving to Madeira?
Yes. The United States taxes citizens on worldwide income wherever they live, so you file both a Portuguese and a US return every year. Credits, the exclusion and the treaty prevent most double taxation, but only when the two filings are planned together.
Can I keep my US LLC after becoming Portuguese resident?
Often yes, but its Portuguese treatment must be established first: administrative rulings have characterised distributions from common configurations as investment income of the member, which changes rates, credits and IFICI interaction. Keep, restructure or replace is a design decision we analyse on your actual LLC, not a default.
Does IFICI’s 20% rate help me if the US taxes me anyway?
Usually, yes: the combined outcome depends on how the Portuguese 20% interacts with the foreign tax credit and the exclusion on your US return. We model the stack line by line before you rely on it.
What is the PFIC problem?
Most European funds and ETFs are PFICs to the IRS, taxed punitively by default with heavy reporting. Americans in Madeira invest around it: US-domiciled assets through the right custody, direct securities, or funds that support the elections your US adviser needs, with the US tax character checked before purchase.
Are my IRA and 401(k) taxed in Portugal?
Distributions are generally within the Portuguese net once you are resident, with treaty and credit rules deciding the final split, and each account type deserves case-by-case characterisation. The Roth mismatch is the point to plan for: US-side tax-free treatment is not automatically mirrored here.
What extra reporting should I expect?
On the US side, FBAR above the threshold, and other forms at higher thresholds and PFIC forms where relevant; on the Portuguese side, foreign income annexes and foreign account disclosure. The two stacks must tell one consistent story.
Do you prepare my US tax return too?
No, and deliberately: we prepare and defend the Portuguese side and the structure, in standing coordination with your US CPA. Two specialists in contact beat one generalist in the middle of the Atlantic.