The misunderstanding we see every filing season
The conversation barely varies. The client set up an Estonian OÜ online, paid somewhere between two and three hundred euros, and was told Estonia has a zero percent corporate tax as long as profits are not distributed. He lives in Valencia, in Malaga or in Madrid. He runs the company from his living room. And nobody told him that the holding is a foreign asset, that the company may have become a Spanish tax resident without his knowing, or that the deferral he bought has a Spanish rule written specifically to switch it off.
That is not his fault. Estonian company formation is a very efficient advertising market, and the people selling it have no incentive to explain the Spanish side. This article is the Spanish side.
Two questions arrive tangled together and are worth separating. The first is whether you must report the holding, which is an information obligation and does not depend on your having received anything. The second is how much you pay, which depends on who controls the company, where it is run from and whether it has resources of its own. The answers are independent and both tend to surprise.
What Estonia actually taxes since 2025
The sales argument is half true, and the missing half is the one that matters.
Estonia does not tax accrued profit, it taxes distributed profit. While the company reinvests, there is no tax. On distribution the charge falls on the company, not on the shareholder. The Estonian Tax and Customs Board puts it without ambiguity: since 2025 dividends are taxed only at company level at the 22/78 rate, and the incentive consisting of the reduced 14/86 rate together with the 7 percent withholding on dividends paid to individuals no longer applies.
That 22/78 is calculated on the net amount distributed. If the company has 100,000 euros available and pays out everything, it distributes 78,000 and pays 22,000 in tax, which is 22 percent of the pre-tax profit.
A second fact from the same source changes the Spanish calculation: as a rule, interest and dividends of non-residents are not taxed in Estonia. There is no withholding at source on the dividend the Spanish shareholder receives.
Why the Estonian tax is not creditable in Spain
Art. 80.1.a) LIRPF allows a credit for the amount actually paid abroad in respect of a tax identical or analogous to this tax or to non-resident income tax on that income. The Estonian charge fails both limbs at once: the company bears it rather than the taxpayer, and it is a corporate tax, analogous to Spanish corporation tax rather than to personal income tax.
The treaty does not rescue it either. The Convention between Spain and Estonia, signed at Tallinn on 3 September 2003, closes its dividends article with the standard OECD formula: “This paragraph shall not affect the taxation of the company in respect of the profits out of which the dividends are paid.” The 5 and 15 percent limits the treaty sets are caps on withholding at source, and Estonia applies none. The Estonian corporate charge sits outside that allocation.
The consequence is that Estonian and Spanish taxation add up with no correction.
The real arithmetic
Assume 100,000 euros of profit, full distribution, and a Spanish resident shareholder whose savings income already sits in the top 30 percent bracket of the Art. 66 LIRPF scale. Assume as well that the OÜ has genuine substance in Estonia and therefore escapes the CFC rules, which is the most favourable possible hypothesis for the structure.
| Item | Estonian OÜ | Spanish SL (turnover < 1M) | Spanish SL (general rate) |
|---|---|---|---|
| Profit | 100,000 € | 100,000 € | 100,000 € |
| Corporate tax | 22,000 € (22/78) | 18,500 € (17 % and 20 %) | 25,000 € (25 %) |
| Distributable | 78,000 € | 81,500 € | 75,000 € |
| Savings income tax at 30 % | 23,400 € | 24,450 € | 22,500 € |
| Double taxation relief | 0 € | not applicable | not applicable |
| Total burden | 45,400 € | 42,950 € | 47,500 € |
| Effective rate | 45.4 % | 43.0 % | 47.5 % |
The result dismantles the sales argument. Once profits are distributed, the Estonian OÜ performs worse than a Spanish limited company with turnover below one million euros, which applies 17 percent on the first 50,000 euros of taxable base and 20 percent on the remainder under Art. 29.1 LIS. It beats a Spanish company at the general rate by barely two points, a margin that disappears against the cost of running two sets of books and two compliance systems.
Art. 91 LIRPF, which removes the deferral
Spain’s controlled foreign company regime requires the taxpayer to include the positive income of the non-resident entity in his own tax base without any distribution being needed. It applies where two circumstances coincide.
The first is control: a holding of at least 50 percent of capital, equity, profits or voting rights. And here is the detail almost nobody anticipates, because the provision counts that holding together with related entities and with other taxpayers connected by family ties, including the spouse, in the direct or collateral line, by blood or by marriage, up to the second degree. A married couple splitting the OÜ fifty-fifty in the belief that neither reaches the threshold is aggregated and caught.
The second is the tax test: foreign tax below 75 percent of what Spain would have charged. While the OÜ retains profits it pays nothing. Zero is below 75 percent of any figure, so the condition is always met during the accumulation phase, which is precisely the phase sold as the advantage.
What gets imputed depends on substance. Paragraph 3 catches passive income by category. Paragraph 2 goes considerably further and imputes total income where the entity lacks the corresponding organisation of material and human resources to obtain it. An OÜ incorporated by power of attorney, registered at the service provider’s address and with no employees, is the textbook case for paragraph 2.
The bigger trap: a Spanish company without knowing it
Everything above assumes the OÜ is a non-resident company. It may not be.
Art. 8.1.c) LIS treats as resident in Spanish territory an entity whose effective place of management is here, and defines the concept precisely: it is deemed to be here “when the management and control of its activities as a whole is located in Spanish territory”. The test says nothing about the registered office, where the deed was signed, or which commercial register holds the file. It is about where decisions are made.
An OÜ whose sole director lives in Spain, contracts from Spain, invoices from Spain and takes every decision from Spain has its management and control in Spain. The company is then liable to Spanish corporation tax on worldwide income, obliged to file the modelo 200 and to keep accounts under Spanish rules, from the year the situation arose.
When this surfaces in an audit, the Modelo 720 is no longer the problem. The problem is the unfiled corporation tax years, with surcharges and interest, and a characterisation argument fought over facts from earlier years that are already fixed.
What goes on the Modelo 720, and in which block
The information obligation lives in the Eighteenth Additional Provision of the General Tax Law and is developed in Arts. 42 bis, 42 ter and 54 bis of Royal Decree 1065/2007. Three blocks, each with its own 50,000 euro threshold assessed independently.
Block 2, the one almost always missing. The holding in the OÜ is a security representing participation in the equity of a foreign legal entity, and it belongs here. It does not matter that the company distributes nothing, that it is dormant, or how it is characterised for substantive purposes. Valuation follows Art. 16 of Law 19/1991 on Wealth Tax, for which you will need the balance sheet as at 31 December.
Block 1. The company’s account with a bank or payment institution outside Spain, where the taxpayer is holder, joint holder, authorised signatory or has power of disposal. In the Estonian ecosystem this is usually an account with an electronic money institution, and it counts exactly like a classic bank account.
Block 3. Real estate abroad held directly by the taxpayer. Where the property belongs to the OÜ, the natural route is Block 2 through net equity, with the same grey area that exists for any interposed company.
If you already have the company and reported nothing
Order matters here, and doing it backwards is expensive.
First establish the substantive position: whether the company is a Spanish resident by effective management, whether the CFC regime applies and from which year. Then quantify the tax due. Only then file the information return and the self-assessments, consistent with each other. Filing a correct Modelo 720 that contradicts earlier personal returns hands over the map of the discrepancy.
Voluntary regularisation before any request from the authority remains far better ground. Following the Court of Justice of the European Union judgment of 27 January 2022 in case C-788/19 and Law 5/2022, a late filing without prior request carries 100 euros per item with a minimum of 1,500 euros, against 200 euros per item and a minimum of 3,000 euros once the tax agency has moved first.
When an Estonian company does make sense
None of this means an OÜ is unworkable. It means its advantage is not the advertised one.
For an entrepreneur whose activity and effective management sit outside Spain, with people, premises and decisions in Estonia, the OÜ is an efficient and entirely ordinary European vehicle. For an e-commerce business selling to EU consumers and needing the OSS scheme, the Estonian administrative infrastructure works well.
The problem appears when the company is incorporated for the tax effect while management stays in Spain. That is not a structure. It is a discrepancy waiting for someone to look at it.
The correct order is the reverse of the one in the advertisement: first the residence and substance analysis of the actual case, then the jurisdiction, and the provider last.