How an Estonian OÜ Works for Residents in Spain
The Irys Solutions OÜ system handles company registration in Estonia,
monthly accounting support, VAT/OSS,, working with banks and fintech platforms,
as well as an analysis tax residency, PE, and CFC risks. The goal is to make your structure clear and
protected for both Hacienda in Spain and banks.
You work online and serve clients from different countries. Our goal is to ensure that the technical side (company, taxes, reporting)
works as a single system: Estonian OÜ + you as a tax resident of Spain,
with clear rules for money flow
and transparent income reporting.
5-step system — from idea to a working OÜ
The logic is always the same: first, to understand whether an OÜ is suitable for your specific case,
then properly register the company,
afterwards — set up accounting, VAT / OSS, and banking operations. All with a constant focus on Hacienda requirements
and
de cumplimiento de las entidades financieras.
Start — Let's analyze your situation
and how you are currently issuing invoices. At this stage, we already assess OÜ would be a reasonable solution
or it would make more sense to remain autonomo or consider an SL in Spain.
2. Setup — OÜ registration and e-Residency
company details, articles of association, registration in the Estonian Business Register, and, if necessary,
VAT number and OSSWe perform the basic operational setup of the company to ensure it is ready for real business operations.
3. Operate — Monthly Accounting
VAT / OSS declarations, annual reporting, and compliance with the Estonian tax calendar
, ensuring the numbers match.
4. Banking and Fintech
Revolut Business, LHV Bank and others.
We prepare a comprehensive solution KYC/AML package to reduce the number of questions and blocks
and avoid repeated information requests.
5. Coordination with Spain
We coordinate the information that may be required by your Spanish gestor.
(dividends, salaries, documents), and separately analyze the risks. PE/CFC risks as part of the Setup.
Start · Setup · Operate — three levels, one system
Not everyone needs the same level of support. Some may first need to understand if an OÜ makes sense in their situation.
Some need to register the company and set up accounting.
That’s why we work with three main blocks.
Start — initial verdict
For those who are in the decision-making process and want to understand an OÜ structure if this is the right choice for them specifically.
- Analysis of tax residency and client profiles.
- Risk map (residency, PE/CFC risks as part of the Setup).
- Recommendation on the structure: OÜ, Spanish SL, or continue as an autónomo.
Suitable if you're still in the evaluation phase and want an honest answer before starting the registration.
Setup — proper registration of an OÜ.
For those who have already decided to create a OÜ and want to avoid mistakes
from the start.
- e-Residency application (if applicable).
- Company registration and preparation of the articles of association.
- Initial tax setup: VAT / OSS, revenue and payment model.
The goal is for the company to start with a clear structure for Hacienda and banks.
Operate — manage the OÜ on a day-to-day basis.
For those who are already invoicing through the OÜ and need administration and accounting and specialized.
- Monthly accounting and basic reports.
- VAT / OSS and annual reporting within the established deadlines.
- Support during bank audits and inquiries.
For those who want to work peacefully and without unexpected compliance issues.
Who is the OÜ system for?
The system is designed for online professionals who want to build a lightweight European structure,
fully compliant with Spanish tax regulations (Hacienda).
- Freelancers and IT teams (development, design, marketing) with clients across different countries.
- Consulting and digital projects with a B2B model or SaaS.
- Small teams (2–5 people) who need a neutral structure for contracts and revenue distribution.
- Situations where banks are already asking questions, and it’s important to put your structure in order before the next review.
If in your case it makes more sense to use purely Spanish solutions (autónomo or SL), we will state that clearly.
Our goal is not to ‘sell an OÜ,’ but to provide you with a structure that can be confidently maintained and defended for 3–5 years.
To get a complete understanding of the OÜ system from Spain, see:
Estonian Company from Spain — Complete Guide 2025.
What risks does this system help reduce
- Unexpected notifications from Hacienda caused by fund movements that don’t match your declarations.
- Bank or fintech platform blocks and ongoing inquiries caused by missing documents or lack of clear structure.
- Improvised structures where personal and corporate finances are mixed.
- OÜs set up without proper analysis of tax residency, permanent establishment (PE), or controlled foreign company (CFC) rules.
We cannot eliminate all risks completely, but we can significantly reduce the likelihood of serious problems,
f the business grows or if your case is reviewed more closely.
Do you want to find out if the OÜ system is right for you?
You can describe your situation via WhatsApp or email. We’ll review your case and explain how OÜ
will work with your Spanish residency, and which steps truly make sense—without any obligation to order anything further.