Two shocks in eighteen months have loosened the two biggest anchors of private wealth near Europe. In April 2025, the United Kingdom abolished its non-dom regime. In the twelve months that followed, prime central London transactions fell by more than 32% and prices by 7%. Then, in early March 2026, Iranian missile strikes on the UAE punctured the idea that Dubai sat outside regional risk. In the first half of that month, Dubai property sales fell by roughly a quarter against the previous fortnight, and brokers started talking about a wait-and-see market in the city that had absorbed more millionaires than anywhere else on earth.

Capital that was parked in London and Dubai is now looking for somewhere else to sit, and southern Europe is the obvious candidate. The easy reading is that it will go wherever the sun, the food and the schools are best, which would make the Costa del Sol, Mallorca and the Algarve the natural winners. The data says something less comfortable. The wealth moving through Europe in 2026 is following tax codes and residency rules first, and lifestyle second.

Start with the numbers everyone quotes, because they need a health warning. Henley & Partners estimated that the UK would lose a net 16,500 millionaires in 2025, the largest outflow it has ever recorded, with Italy gaining 3,600 and Switzerland 3,000. Those figures are estimates, and serious practitioners have called them closer to marketing than measurement. HMRC’s own data shows the number of non-doms fell by only about 1,200 in the final tax year before the reform, from 83,100 to 81,900. The truth sits between the two. Fewer people are physically leaving than the headlines suggest, but far more capital is being reallocated. Henley’s 2026 report frames it itself: the wealthy are building “sovereign portfolios” across several jurisdictions rather than moving house once. For real estate, that is the distinction that matters. A portfolio has one tax home and several lifestyle homes, and they do not have to be in the same country.

Seen that way, Europe’s prime markets are sorting into three corridors.

The first is the tax-residence corridor, and Italy is winning it. Its flat tax lets a new resident pay a fixed sum on all foreign income, for up to fifteen years. It started at €100,000 in 2017, doubled to €200,000 in 2024 and rose to €300,000 from 1 January 2026, plus €50,000 per family member. Milan’s financial community nicknamed it “svuota Londra”, empty London. Rome keeps raising the price and demand keeps coming: Knight Frank reported this week that completed prime deals in Italy rose 140% in the first eight months of 2026, with demand spreading from Tuscany and the Lakes to Milan, Rome, Liguria and Venice. Milan is now Italy’s most expensive city, at an average of €5,171 per square metre, after a 38% rise over five years. Italy is not competing on lifestyle. It is selling a legal status, and it has discovered that the richer the buyer, the less the price of that status matters.

The second is the residency-by-investment corridor, which Spain and Portugal have largely closed and Greece has kept open. Spain ended its property golden visa on 3 April 2025. Portugal closed its real estate route in October 2023 and now only offers residency through €500,000 fund investments and similar routes. Greece raised its thresholds instead of abolishing them: €800,000 in Athens and the main islands, €400,000 elsewhere and €250,000 for conversions. Henley’s 2026 report says directly that Spain’s closure pushed demand towards Greece. When governments close a pathway, the demand does not disappear. It relocates to the nearest open door.

The third is the lifestyle corridor, and Spain still dominates it. Mallorca’s foreign-buyer prices rose 7% in the second half of 2025, the highest of any Spanish region, and Germans account for 59% of non-resident prime buyers there. In Marbella, Estepona and Benahavís, local brokers counted around 8,540 transactions in 2025, down about 4.5% on 2024. In the first quarter of 2026, prices rose 4.7% in Marbella but fell 6.9% in Estepona, where new supply has run ahead of demand. Northern Europeans remain the core of the buyer base, with American, Latin American and Gulf buyers growing at the very top. This is a strong market. It is not a migration corridor. Most of these buyers are adding a Spanish home to a portfolio whose tax address is somewhere else.

Here is what the market underweights. Spain’s problem is not demand; it is legal predictability. In January 2025, the government proposed a tax of up to 100% on property purchases by non-EU non-residents. By March 2026 it had stalled in Congress, blocked from both sides. Foreign buyers still made up 20% of Spanish purchases in 2025, unchanged on the year. But the proposal has done its damage by existing, because it tells a family office drawing up a fifteen-year plan that the rules can change. On top of that sits a national solidarity tax on net wealth above €3 million. Andalucía and Madrid have removed their regional wealth tax, but the national levy still applies. Italy offers a fixed price for fifteen years. Spain offers a better climate and a rulebook that has changed twice in two years. A wealthy newcomer can holiday on either. They will only settle their tax home in the one that can be modelled.

The implications cut both ways. For Spanish developers and brokers on the Costa del Sol and in the Balearics, the opportunity is intact but different: they are selling the lifestyle node of a multi-country portfolio, not a relocation, and product, service and marketing should be built for an owner who is present for weeks, not years. For Spanish policymakers, the lesson is harder. Closing the golden visa and floating a 100% tax may have been designed with housing affordability in mind, but they did not move the buyers who compete with Spanish families. They moved the tax residents, and the income, consumption and investment that come with them, to Milan and Athens.

The winners of 2026 are Milan and the broader Italian prime market, Athens and the Greek islands, and the Swiss and Monegasque addresses that absorb the tax homes. Mallorca and prime Marbella also win, as long as they are honest about what they are selling. The losers are London’s prime market, Dubai’s safe-haven premium, over-supplied new-build schemes like parts of Estepona, and Spain as a place where Europe’s new wealth chooses to pay its taxes.

Spain now faces a clear choice. It can keep winning the second homes of Europe’s wealthy and accept that their tax lives happen elsewhere. Or it can decide that it wants the tax residents too. Right now, its rulebook only allows the first.