The premise sounds simple: keep a US paycheck, live in Lisbon or Berlin, pay less tax on the difference between American salaries and European costs. The mechanics are not. A US citizen who moves to Europe without changing their legal employment structure creates three separate tax problems at once — for themselves, for their US employer, and for the country they land in — and each one has a different fix. This guide walks through the four legal structures that actually work for anyone moving to Europe and keeping a US job, what each costs in tax, what it triggers on the employer side, and how the US totalization agreements with Portugal, Spain, and Germany change the social-security math.
The four structures at a glance
There are essentially four legal ways to keep working for a US company from Europe. Each is a different combination of who employs the worker on paper and where the payroll runs:
- US W-2 remote. The employer keeps running US payroll and does nothing else. Simple for the employer, risky for both parties.
- Employer of Record (EOR). A third-party payroll provider becomes the legal employer in the destination country and invoices the US company for salary plus employer costs.
- Foreign contractor with your own entity. The individual registers as self-employed or sets up a local company in the destination country and invoices the US employer as a vendor.
- Dual employment / split contract. The US company opens (or already has) a legal entity in the destination country, and the worker becomes a joint employee of both.
Which one fits depends less on personal preference than on three variables: how many days the US role requires stateside, whether the employer already has a European entity, and whether the destination offers a special inbound tax regime.
Structure 1: Keep the W-2, cross your fingers
This is what most people try first: fly to Europe, keep the direct-deposit US paycheck, and never tell anyone. It is legal for a US citizen — Americans are taxed on worldwide income regardless of residency — but it does not stop being illegal for the employer or for the destination country.
Once the individual becomes a tax resident of Portugal, Spain, or Germany (the trigger is the same 183-day threshold, augmented by center-of-vital-interests tests), that country expects to tax their worldwide employment income at its own rates. Portugal's progressive scale runs to 48% plus a 2.5–5% solidarity surcharge. Spain's runs from 19% to 47% at the state level, with regional add-ons that push effective top rates above 50% in autonomous communities like Catalonia and Valencia. Germany's tops out at 45% plus a 5.5% solidarity surcharge on the tax itself and, for anyone registered with a church, church tax on top.
The US side is manageable with the Foreign Earned Income Exclusion (FEIE — approximately $130,000 for 2025 and inflation-indexed annually; verify the current IRS figure) or the Foreign Tax Credit. The destination side is not. Running foreign payroll or filing local income tax as a W-2 employee whose employer has no local entity means self-reporting, quarterly payments in the local currency, and — critically — social-security contributions that ordinarily an employer would remit.
Then the employer problem: a US-payroll employee working from a fixed home office in Munich for a year can create a permanent establishment (PE) for the US company in Germany, exposing US corporate profits allocable to that employee's activity to German corporate tax at roughly 30% combined. That is not a theoretical risk. See how remote employees create PE exposure for the mechanics.
Structure 2: Employer of Record (EOR)
An EOR is a third-party company that already has legal entities in the destination country. The US employer signs a service agreement, the EOR employs the individual locally on a fully compliant contract, and the US company pays a wrapped invoice: gross salary plus employer social security plus EOR margin (typically several hundred dollars per month per employee).
From the individual's perspective, the paycheck now looks like a local paycheck. Portuguese, Spanish, or German income tax and employee social security are withheld at source. The individual files as a normal tax resident. On the US side, they still owe US tax on worldwide income, but the Foreign Tax Credit generally offsets it dollar-for-dollar because European rates exceed US rates on comparable earned income.
The main cost is the employer-side social-security wedge. Germany's total employer contribution runs roughly 20% of gross salary; Spain's is around 30%; Portugal's is 23.75%. Plus the EOR margin. A $150,000 US salary rewrapped through a Berlin EOR often costs the US company somewhere in the $185,000–$200,000 range all-in, and the employee's take-home in euro terms depends heavily on whether a special inbound regime is available. See EOR vs contractor — the tax trade-offs for a side-by-side.
The upside is legal clarity. EORs are how most compliant remote-first US companies solve this today. The downside is that the employer's cost roughly matches — and often exceeds — the cost of hiring a European directly, without the benefit of the local network or physical presence.
Structure 3: Foreign contractor with your own entity
Instead of being employed in the destination country, the individual becomes self-employed there and invoices the US company as a vendor. In Portugal this is trabalhador independente; in Spain it is autónomo; in Germany it is Freiberufler or Gewerbetreibender.
This is often cheaper for the US employer — no employer social-security match, no EOR margin — and can be cheaper for the individual if a special regime applies. Portugal's IFICI ("NHR 2.0") regime, for instance, taxes qualifying Portuguese-source self-employment income at a flat 20% for 10 years, versus the 48% top marginal rate that would otherwise apply. Eligibility is narrow: the activity must sit in scientific research, innovation, tech, or higher education (EQF Level 6 with 3+ years' experience, or Level 8/PhD), and anyone who was Portuguese tax resident in any of 2021–2025 is excluded. The predecessor NHR regime closed to new applicants on 1 January 2024. See the IFICI regime explained.
Spain's Beckham Law does not cover self-employed autónomos — it is a Spanish-source employment-income regime only. This matters because it constrains the structuring choice: an American who wants Beckham's flat 24% on Spanish-source earned income up to €600,000 must be a formal employee of a Spanish entity (which loops back to Structure 2 or 4), not an invoice-issuing contractor.
Germany has no comparable special regime. A Freiberufler pays standard progressive rates.
The traps are real. Most European tax authorities apply substance-over-form tests: if the individual has one client, works fixed hours, uses employer equipment, and cannot subcontract, the tax office may reclassify the arrangement as employment and collect back employer social security from — depending on jurisdiction — the individual, the US company, or both. And the contractor still owes US self-employment tax (12.4% Social Security up to an annual wage base plus 2.9% Medicare — the wage base is indexed each year) unless a totalization agreement exempts them.
Structure 4: Dual employment
If the US employer already has a European entity — or is willing to set one up — the individual can hold two employment contracts simultaneously: one with the US parent for US-based responsibilities (paid in dollars into a US account) and one with the European subsidiary for time physically worked in Europe (paid in euros, taxed locally).
This is the cleanest structure when the role is genuinely split — say, a US-based team lead who spends three months per quarter in Madrid. It also unlocks Beckham Law for the Spanish leg, because the Spanish contract is real employment. The complexity is administrative: two payroll runs, allocation of workdays by country, and careful documentation for both tax authorities to avoid double taxation of the same day's work.
Country deep dives
Portugal
The default rate on Portuguese-source employment or self-employment income is progressive up to 48%, plus a 2.5–5% solidarity surcharge on high incomes. Investment income (dividends, interest, capital gains) is taxed at a flat 28%. There is no wealth tax and no inheritance tax, though a 10% stamp duty applies to inherited assets. Tax residency triggers at 183 days or having a home available in Portugal on 31 December.
The IFICI regime is the key opportunity for Americans in qualifying activities: 20% flat on Portuguese-source employment or self-employment income for 10 years. The D8 digital-nomad visa (income threshold approximately €3,480/month, roughly 4× the minimum wage) grants residency but does not by itself confer IFICI benefits.
Spain
The default is progressive 19–47% state tax plus regional variation — some autonomous communities push effective top rates above 50%. Investment income is taxed on a separate savings scale: 19% up to €6,000, 21% to €50,000, 23% to €200,000, 27% to €300,000, and 30% above €300,000. Spain retains a wealth tax (Madrid and Andalusia effectively neutralise it via 100% bonificación), and the temporary solidarity wealth tax of 1.7–3.5% on net wealth above €3M has been extended through 2026.
The Beckham Law flat 24% on Spanish-source employment income up to €600,000 for six years is a strong outcome for high-earning employees but excludes freelance income and requires that the individual not have been Spanish tax resident in the prior five years. The 2023 reform made Digital Nomad Visa holders eligible; the DNV income threshold rose to €2,849/month from 1 January 2026 (225% of the SMI).
Germany
Germany is the high-tax comparator here. Progressive 0–45% plus the 5.5% solidarity surcharge on the tax (effective top marginal closer to 47.5%), plus church tax if applicable, plus employee social-security contributions up to the assessment ceilings for pension, health, unemployment, and long-term care insurance. Investment income is taxed at a 26.375% flat rate (25% Abgeltungsteuer plus solidarity surcharge). No wealth tax; inheritance tax runs 7–50% depending on relationship and amount. There is no US-style special inbound regime; Americans working from Germany pay full German rates.
Social security and totalization
The US has bilateral totalization agreements with Portugal, Spain, and Germany. These agreements do two things: they prevent an individual from paying social-security tax to both systems on the same wages, and they let years worked in one country count toward vesting in the other's benefits.
The practical mechanism is the Certificate of Coverage. If a US employee is sent abroad on assignment for up to five years, the employer applies to the US Social Security Administration for a certificate confirming continued US coverage. The employee and employer keep paying US FICA; the destination country's payroll system exempts them. Without a certificate, both systems assess in parallel.
For self-employed Americans who become tax resident in one of these three countries, totalization typically shifts contribution obligations to the country of residence — meaning the American stops paying US self-employment tax and instead pays into the local system. The direction is regime-specific and depends on employment structure and length of stay, so a cross-border adviser should confirm before the individual files.
Employer-side permanent establishment risk
PE is the tax-authority claim that a foreign company has enough presence in-country — through a fixed place of business or a dependent agent — to be taxed on the profits attributable to that presence. A US-payroll employee working from their home in Barcelona for 12 months, signing contracts on behalf of the US employer or generating revenue from Spanish soil, can meet either test.
The consequences fall on the employer, not the employee: local corporate tax on allocable profits (25% in Spain, 19% in mainland Portugal, roughly 30% combined in Germany), plus payroll and VAT registration exposure. EOR arrangements are designed to prevent this by ensuring the individual is employed by the EOR's local entity, not the US parent, and by keeping contract-signing authority away from the individual on paper. Contractor structures reduce PE risk if the contractor genuinely acts independently. Dual-employment structures with a real subsidiary sidestep it, because the local entity is taxed locally by design.
Cost comparison
Ballpark all-in cost to the US employer of moving a $150,000 US W-2 salary to each country, as of 2026, using each country's default (non-special) regime. Local currency conversions, social-security caps, and EOR pricing move; verify with an EOR quote or local payroll adviser before budgeting.
| Structure | Portugal | Spain | Germany |
|---|---|---|---|
| W-2 remote (non-compliant for employer) | PE + back tax exposure | PE + back tax exposure | PE + back tax exposure |
| EOR (all-in employer cost) | ~$185k–$195k | ~$195k–$205k | ~$185k–$200k |
| Contractor (invoice + local tax on individual) | ~$150k + advisory | ~$150k + advisory | ~$150k + advisory |
| Dual employment (existing entity) | Allocated by workdays | Allocated by workdays | Allocated by workdays |
Employee take-home varies far more than employer cost. A €150,000-equivalent Portuguese salary under IFICI's 20% flat rate leaves radically more than the same salary under the default 48% band. A Spanish salary under Beckham keeps 76% of the first €600,000 versus roughly 50% at the top marginal band. Germany has no equivalent — a Berlin package converts to notably less take-home than a Lisbon or Madrid one at the same gross.
What to do first
Before choosing a structure, three things are worth confirming. First, the US employer's actual position — many are open to EOR, some categorically refuse foreign work, and a smaller number already have European entities. Second, the destination country's special-regime eligibility, because the answer changes the math entirely. Third, whether an existing US state connection (California in particular) will follow the individual overseas; severing state residency is often a required step before any of this pays off.
This article is informational only and not legal or tax advice. Structures, thresholds, and treaty positions change; anyone considering a move should work with a cross-border tax adviser qualified in both the US and the destination country before signing anything.
Where to go next
For the country data underlying the comparisons above, see Portugal, Spain, and Germany, or use the country compare tool. For the mechanics that link them, read the totalization agreements guide, PE risk from remote employees, and tax planning for remote workers. First-timers may also want the first-year-abroad tax mistakes primer and the TaxAtlas FAQ.