Entity Setup
Building the Right Entity in the EU Under GMT & ATAD 3: What Founders Must Know
Founders and startup owners exploring entity setup in the EU need to understand how Global Minimum Tax (GMT) and ATAD 3 shape corporate structures, deductible expenses, and intra-group transactions.
By NomadicTax Research Team • 5-8 min read • August 24, 2026
## Defining GMT & ATAD 3
- The **Global Minimum Tax (Pillar 2)** requires multinational groups with revenue over **€750 million** to pay a minimum 15% effective tax rate. Applies EU-wide via Council Directive (EU) 2022/2523. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/news/vat-digital-age-2026-work-programme-available-2026-05-22_en?prefLang=ga&utm_source=openai))
- **ATAD 3**, adopted earlier, adds new rules on **dual-resident entities** and **hybrid mismatches**, further closing loopholes in cross-border tax planning. These rules prevent companies that are resident in two or more jurisdictions from exploiting mismatches to reduce tax. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/taxation/business-taxation/anti-tax-avoidance-directive_en?utm_source=openai))
## Entity Types & Their Implications
### Pass-Through vs. C-Corp-Type Entities
- Many EU jurisdictions don’t have pass-through entities like U.S. S-corps; income is taxed at entity level, then distributions can be taxed again (dividends). Hybrid mismatch rules under ATAD 3 may affect structure if entity treated differently in two countries. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/taxation/business-taxation/anti-tax-avoidance-directive_en?utm_source=openai))
### Residency & Permanent Establishment (PE)
- Incorporation in one country while operating in others: PE risk if operations, employees, assets exist elsewhere.
- Dual residency issues are tightened under ATAD 3: avoid structures where an entity is resident for tax purposes in different jurisdictions to exploit benefits. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/taxation/business-taxation/anti-tax-avoidance-directive_en?utm_source=openai))
### Transfer Pricing & Interest Limitation Rules
- ATAD 1’s interest limitation rules require businesses to limit net interest deduction to 30% of EBITDA (or a fixed amount). Entity structures should align so financing is transparent and Debt-equity mixes are balanced. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/taxation/business-taxation/anti-tax-avoidance-directive_en?utm_source=openai))
## Strategic Considerations When Choosing Jurisdiction
| Factor | What to Look For | Examples |
|---|---|---|
| Corporate Income Tax Rate + Pillar 2 Implementation | Ensure effective rate not falling below 15% or facing top-up tax under GMT | Countries like Ireland or Luxembourg historically low rates but now constrained by GMT rules |
| Hybrid Entities & Dual Residency Risks | Avoid using entities treated differently for tax/residency in both state of incorporation & operation | If using a holding company in Country A and operations in Country B, check both sides’ definitions of residence and attribution of profits/losses |
| Withholding Taxes | Under Omnibus proposal, intra-EU withholding may be abolished—but this depends on adoption and member state transposition. Plan contracts accordingly. |
| Substance & Reporting Requirements | Entities must have real substance (people, offices, oversight) to pass once meaningless shell tests under EU directives. | Shell entities failing those tests will have to report detailed substance info under existing and future shell entity directives. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/taxation/business-taxation/unshell-proposal_en?prefLang=lt&utm_source=openai))
## Example Setup: Startup Owner Scenario
- Suppose you found a tech startup: legal entity in Estonia, main operations in Portugal, and customers across the EU.
1. Ensure entity governance occurs in Estonia—not simply a postal address. Directors must truly oversee operations.
2. Intra-EU dividend payments from Portuguese branch to Estonian head entity should aim to benefit from withholding tax abolition under the Omnibus directive once in force.
3. Structure financing to avoid unnecessary interest deductions limitations; ATAD’s interest rules may conflict with high leverage.
4. With Pillar 2 in effect, you need to track effective tax rate per jurisdiction: if any jurisdiction slips below 15%, top-up tax could apply under the directive. Keep documentation to defend your rate. |
## Takeaway
For founders, entity setup in the EU is now more complex—and yet more manageable—with reform. Using the right jurisdiction, ensuring substance, watching hybrid mismatches, and aligning with GMT/ATAD 3 can deliver both compliant and efficient entity structures. Where possible, simplify contracts and intercompany payments in anticipation of withholding tax abolition. Legal and tax advice crucial at each step.