Ask a wealthy, mobile family where to base today and three names recur: Spain, Portugal and Dubai. They are not really competing on lifestyle, each is attractive in its own way, but on a deeper trade-off between how a place feels to live in and how it treats a fortune. There is no universal winner, because the right answer depends entirely on the shape of the family, its wealth and its intentions. What there is, is a clear set of trade-offs that a family can decide against, rather than drift into.
Dubai: zero tax, further away
Dubai’s appeal is blunt and powerful: no personal income tax, no wealth tax, and a base built to welcome international wealth. For a family whose priority is minimizing personal tax and whose life can genuinely centre there, it is hard to beat on numbers. The trade-offs are non-financial and real: distance from Europe, a very different environment, and the question of whether the family’s life truly relocates or merely claims to, which matters because a base only delivers if it is genuine.
A visa is not residence. Cabinet Decision No. 85 of 2022 sets out a federal test for tax residency with three doors: the usual place of residence and the centre of financial and personal interests in the State; 183 days of physical presence in any twelve consecutive months; or 90 days for a national, a Gulf Cooperation Council national or a permit holder, each of whom must also keep a permanent home or work there.
On the personal side the official government platform records the absence of personal income tax on individuals. The business side is no longer blank. Federal Decree-Law No. 47 of 2022 imposes a federal corporate tax on financial years beginning on or after 1 June 2023, with Cabinet Decision No. 116 of 2022 fixing the rate and its threshold: nil below AED 375,000 and 9 per cent above.
The move does not erase the country of departure: source taxation survives it. The treaty network is also narrower than it looks. Under Article 4 of the Spain-Emirates double tax convention, a resident of the Emirates is an individual domiciled there who is also an Emirati national, or a company incorporated there with its effective management there. A European family on a residence permit sits outside that definition, so the tie-breaker never engages.
Spain: lifestyle first, tax managed
Spain sells lifestyle, proximity to the rest of Europe, and, for those who plan, a manageable tax position through the regional wealth-tax landscape and the inbound regime, as in our notes on the Spanish wealth tax and the Beckham law. It asks more planning than Dubai, because the default position is a full European tax system, but for a family that wants to actually live in Europe, it offers a life Dubai cannot, with a tax outcome that thoughtful structuring keeps reasonable.
The default rule has three legs. Article 9 of the Spanish income tax law treats a person as resident on more than 183 days in the calendar year, or where the main core or base of economic interests lies in Spain, directly or indirectly, or by presumption where the non-separated spouse and dependent minor children live there. Sporadic absences count unless tax residence elsewhere is evidenced, and the calendar year does not split.
Article 93 of the same law opens the inbound regime to someone not resident in Spain in the five preceding periods whose move follows an employment contract, a directorship, a recognised entrepreneurial activity or qualifying research work, and it runs for the year of the change plus five. The special inbound regime then taxes under the non-resident rules at 24 per cent on the general base up to 600,000 euros and 47 per cent above, with wealth tax on Spanish assets only.
The wealth tax statute lets each region set the exempt minimum, defaulting to 700,000 euros where none is set. Above it the solidarity tax on large fortunes, which regions cannot reduce, charges nil on the first 3,000,000 euros of net wealth and then 1.7, 2.1 and 3.5 per cent, crediting wealth tax actually paid. Royal Decree-Law 8/2023 extended it until wealth taxation is reviewed, so a long plan should treat it as permanent.
Dubai wins the spreadsheet. Europe wins the life. The right base is the one where the family actually wants to be, structured so the tax does not punish the choice.
Portugal: the middle, recalibrated
Portugal long occupied the sweet spot, European lifestyle with a generous tax welcome, but with the original NHR regime closed to new entrants and replaced by something narrower, the proposition has shifted, as we describe in our note on Beckham, Italy or Portugal. It remains a serious option, particularly for the right profile, but the family that remembers the old Portugal has to assess the new one on today’s terms.
The Portuguese residence rule counts more than 183 days, consecutive or not, in any twelve-month period beginning or ending in the year, a day of presence being any day, whole or partial, that includes an overnight stay. Short of that, a dwelling held in conditions suggesting an intention to keep and occupy it as habitual residence is enough on its own. Residence is assessed per household member.
The non-habitual resident regime did not simply lapse. Paragraphs 8 to 12 of that same article, which carried it, were repealed by Law 82/2023 of 29 December, the budget law for 2024, with transitional protection for those already inside it. A family that structured around the old arrangement keeps what it has.
What replaced it is narrower by design. The replacement incentive regime gives a 20 per cent rate on net employment and self-employment income from listed activities, for ten consecutive years from registration as resident, to someone not resident in Portugal in the previous five years. The list is the point: scientific research and higher education, certified start-ups, exporting industrial and service companies. It rewards productive work, not passive wealth.
What the authority looks at when residence is disputed
Residence is contested on evidence, not on intention. The economic interests leg of the Spanish rule decides most hard cases, because it can point to Spain when the day count does not. Utility consumption, school enrolment, medical records and card usage are what an inspection assembles.
The family presumption is underestimated. One parent abroad while the household stays in Spain is not a neutral fact pattern. It raises a rebuttable presumption of residence, to be met with evidence in the year it is challenged and in every year after it.
Where two states both claim a person, a convention decides, but only if it covers that person at all. The tie-breaker runs in order: permanent home available, centre of vital interests, habitual abode, nationality, then agreement between the competent authorities. Keeping a home in both places pushes the question onto the centre of vital interests, decided on the same domestic evidence an inspection assembles.
The operating company does not move with the family
Spain treats an entity as resident if it was incorporated under Spanish law, if its registered office is in Spain, or if its effective place of management is in Spain, which the corporate income tax law defines as where the direction and control of its activities as a whole are located. Two tests are formal. The third follows the people.
So the founder who moves to Dubai has not detached the company if the board and the real decisions stayed behind. The converse is equally live: the Emirates treat a foreign company effectively managed and controlled in the State as a resident person under Article 11 of the corporate tax decree-law. Dual corporate residence is not a planning outcome but a conflict, with filings on both sides until something resolves it.
The narrower risk is a permanent establishment. It is created by management exercised from a new country without moving the company at all, and it splits profit on transfer pricing terms nobody prepared. Where a convention covers both sides, a dual-resident company is allocated to the state of effective management, which settles residence but leaves the permanent establishment question open. With the Emirates that condition is often unmet, because the convention reaches only companies incorporated there.
Reporting obligations and the cost of leaving
Arrival in Spain creates a reporting duty independent of any tax. The eighteenth additional provision of the general tax law requires residents to report foreign accounts they hold or can operate, securities and shareholdings, life policies, real estate and virtual currencies held abroad, and it extends the duty to beneficial owners. It is an information return, filed whether or not anything is payable.
Its penalties are what changed. In Commission v Spain the Court of Justice held on 27 January 2022 that taxing undeclared assets as unjustified capital gains with no practical limitation period, a proportional fine of 150 per cent of the tax, and uncapped flat-rate fines all breached Article 63 of the Treaty. The judgment in Case C-788/19 declared the breach, and Law 5/2022 then removed those consequences. The duty itself survives.
Leaving has a price of its own. The income tax law imposes a charge on change of residence on unrealised gains in shares, for someone resident in at least ten of the fifteen preceding periods, where the holdings exceed 4,000,000 euros, or 1,000,000 euros with a stake above 25 per cent. Portugal can reopen the whole year of departure, but only where the stay passed 183 days and income arising after the last day of presence would have been taxable there, and not where another EU or EEA state taxes it. A badly timed exit can cost a full extra year of worldwide taxation.
The decision behind the decision
The choice ultimately turns on where the family genuinely wants to live, because a base built against that grain fails whatever its tax rate, and on how the wealth is shaped, since a large foreign income, an active business, or property-heavy holdings each point differently. And wherever the family lands, the structure underneath, the holding, the succession, the ownership of homes, does much of the work, which is why we treat the base decision as one part of a whole plan, alongside family office structuring and cross-border succession. The wrong question is which country has the lowest rate. The right one is where this particular family should actually build its life, and how to structure that so the tax follows sensibly.
Montclare advises international individuals and families on buying, holding and moving to Spain: the structure, the tax, the residence and the succession, handled as one plan. Our services are set out on our services page.
This article is informational and does not constitute tax, legal or immigration advice. Spanish regimes vary by region and change frequently, and treatment depends on personal circumstances. Each engagement is subject to scope and applicable regulation.