Portugal, Spain or the UAE: the comparison is not about the rate

On tax alone, yes, and by a wide margin — the UAE charges 0% on taxable income up to AED 375,000 and 9% above it, with no personal income tax and no tax on dividends, against roughly 42% all-in once a Portuguese or Spanish company distributes its profit to a resident owner. But that comparison only holds if you genuinely do not live in the EU. A UAE company managed from Lisbon or Madrid is tax resident where its management is, on worldwide profits, and both the Portugal–UAE and Spain–UAE treaties break a company residence tie by place of effective management. There is no treaty route out of it.

Portugal: 19% for 2026, falling to 18% in 2027 and 17% from 2028, with 15% on the first 50,000 euros for an SME, plus a municipal surcharge of up to 1.5% and a state surcharge of 3, 5 or 9% on profit above 1.5, 7.5 and 35 million euros. Spain: 25% generally, 23% for a company with turnover under 10 million, and 19% on the first 50,000 euros plus 21% on the rest for a micro-enterprise with turnover under 1 million. UAE: 0% up to AED 375,000 and 9% above, with the figure set not by the decree-law but by Cabinet Decision 116 of 2022.

Yes, and this is the single most consequential fact for a Portuguese structure. The United Arab Emirates remains item 22 of Portaria 150/2004, the list of clearly more favourable tax regimes. Portaria 292/2025/1 of 5 September 2025 removed Hong Kong, Liechtenstein and Uruguay with effect from 1 January 2026 and left the UAE untouched. The consequences are a 35% aggravated withholding rate on capital income, loss of the article 51.º CIRC participation exemption, CFC attribution under article 66.º, a reversed burden of proof on deductibility and a 10% IMI rate on property. Spain, by contrast, removed the UAE from its own list when Orden HFP/115/2023 replaced the old one.

Only on Qualifying Income, which is a much narrower category than the marketing suggests. The list in article 2(1) of Ministerial Decision 265/2023 contains fourteen activities — manufacturing, processing, qualifying commodity trading, holding shares for at least twelve months, ships, reinsurance, fund management, wealth and investment management, headquarters and group treasury, aircraft leasing, Designated-Zone distribution and logistics. Export consulting, marketing, software development, agency work and consumer subscriptions are not on it. Client geography is not a criterion anywhere in Cabinet Decision 100 of 2023, so “my clients are abroad, therefore 0%” has no basis. And a Qualifying Free Zone Person gets no AED 375,000 band at all.

If you take the real decisions from Portugal, article 2.º(1)(a) CIRC makes the company Portuguese tax resident on its worldwide profits, because having either its seat or its effective management in Portugal is enough — the tax authority confirmed in ruling PIV 26078 that the two tests are alternatives. You then owe IRC, the municipal and state surcharges, Modelo 22, the IES and a transfer pricing file, retroactively, with penalties and interest. Short of full residence you get a permanent establishment instead under article 5.º CIRC, which is better but not much.

Less, which is the honest answer. The structural disadvantages of a third-country company are the Parent-Subsidiary Directive and the Interest and Royalties Directive, both of which apply only between EU member states, and the VAT position: an EU-established company gets an EU VAT number, zero-rated intra-EU supplies, the business-to-business reverse charge and the Union scheme for consumer sales. A UAE company is on the Non-Union scheme for services and, for goods, needs an EU-established intermediary to use the import one-stop shop at all. If your customers and suppliers are all outside the EU, none of that costs you anything.

It depends far more on the region and on your assets than on the headline. Spain’s top combined income rate runs from 45% in Madrid to 53.85% in Comunitat Valenciana, both only above 300,000 euros, and its savings scale on dividends goes to 30% above 300,000. Portugal applies a flat 28% withholding on dividends to a resident individual, with the option to include them in the progressive scale instead. The bigger divergence is that Spain has a wealth tax and a solidarity tax on large fortunes and Portugal has neither.

Effectively yes, above about 3.7 million euros of net assets, though not to the regional treasury. Madrid bonifies the wealth tax by 100%, but it converted that into a differential relief, so what the region waives the state collects as the temporary solidarity tax on large fortunes. The solidarity tax applies above 3 million of net wealth with a 700,000 exempt minimum, at 1.7, 2.1 and 3.5%, and it credits any wealth tax actually paid. It was never made permanent: it was extended indefinitely by a separate provision of Real Decreto-ley 8/2023, pending a reform of regional financing that has not happened.

Not on the rate. Above 750 million euros of consolidated group revenue all three jurisdictions converge on a 15% floor. Portugal transposed Pillar Two in Lei 41/2024, Spain in Ley 7/2024, and the UAE collects the top-up itself through a domestic minimum top-up tax under Cabinet Decision 142 of 2024, for financial years beginning on or after 1 January 2025. Free-zone entities are not carved out. Above the threshold the advantage inverts: you pay the same 15% but without the EU directives, without the single market and, for a Portuguese group, with the blacklist problem on top.

Officially: Portugal same-day through Empresa na Hora with a pre-approved name and articles, or one to two business days online; Spain one to five business days through the CIRCE electronic system, or two to four weeks by the conventional notarial route; UAE free zones are advertised at two to five working days. Realistically, for a non-resident owner, allow two to six weeks in Portugal, four to ten in Spain, and six to twelve in the UAE once you include the establishment card, the manager’s residence visa, the Emirates ID and the bank account. The “48 hours” figures for Dubai are agents’ marketing claims with no free-zone authority publication behind them.