Compliance
Compliance Spotlight: DAC9, Pillar 2 & Brazil’s Global Minimum Tax Impact on EU Multinationals
EU companies face a tightening net: DAC9 and the Pillar 2 Directive sharpen reporting obligations while OECD studies estimate material revenue shifts. Preparation and clarity matter.
By NomadicTax Research Team • 5-8 min read • September 12, 2026
“Effective tax rates rose by 2.8-3.7 p.p. on average for in-scope multinationals in 2025.” That finding, from a new OFC/OECD report, has urgent compliance implications for EU multinationals. ([oecd.org](https://www.oecd.org/en/about/news/announcements/2026/07/oecd-publishes-new-analysis-on-the-economic-impacts-of-the-global-minimum-tax.html?utm_source=openai))
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## What Are DAC9 and Pillar 2?
- **Pillar 2 Directive (Council Directive EU 2022/2523)** establishes minimum effective tax rate rules for large multinational enterprise groups (MNEs) and large-scale domestic groups (LSDGs) in the EU. Reporting obligations include “top-up tax information returns”. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/document/download/aef31a0e-a6ad-47a7-bdec-afc66eee98df_en?filename=2.+MASP-T_Rev.+2022_Annex+2_Consolidated+fiches_V1.0.pdf&utm_source=openai))
- **DAC9** (Directive on Administrative Cooperation, latest amendment) aligns with Pillar 2 by easing the administrative burden: one central filing per group, common templates, and clearer obligations. ([oecd.org](https://www.oecd.org/en/topics/cross-border-and-international-tax.html?utm_source=openai))
## Recent Developments
- An updated OECD analysis (July-August 2026) found that implementation of the Global Minimum Tax (GMT) is reducing tax differentials and profit-shifting; global corporate income tax revenues may increase by **3.2-5.4% annually** due to GMT effects. ([oecd.org](https://www.oecd.org/en/about/news/announcements/2026/07/oecd-publishes-new-analysis-on-the-economic-impacts-of-the-global-minimum-tax.html?utm_source=openai))
- Under Pillar 2, **Cyprus** has been confirmed via Commission FAQ as having a “qualified Income Inclusion Rule” for returns from fiscal years starting 31 December 2023; Member States must accept it in their interactions under DAC9. ([taxation-customs.ec.europa.eu](https://taxation-customs.ec.europa.eu/news/pillar-2-global-minimum-tax-directive-new-faq-available-2026-05-29_en?prefLang=de&utm_source=openai))
## What EU Multinationals Need to Do: Compliance Checklist
| Compliance Area | Key Requirement | Action Step |
|---|---|---|
| **Top-up tax returns** | MNEs/LSDGs must file returns as prescribed under Pillar 2 | Map constituent entities, thresholds, fiscal year alignment; gather financial data to calculate effective tax rates |
| **Single-group filing under DAC9** | Only one return per group centrally, using standard forms | Coordinate across jurisdictions; ensure that group-wide data systems can support consistent reporting templates |
| **FAQ/Guidance monitoring** | Interpretations (e.g. Cyprus’s status) can affect mutual acceptance and filing obligations | Monitor European Commission FAQs; update internal compliance processes accordingly |
| **Systems & data readiness** | Effective rate calculations require quality data across jurisdictions | Establish robust accounting, data collection, audit traceability; engage advisors for jurisdictions with weak infrastructure |
## Challenges & Risks to Watch
- **Differing Member State implementations**: Even with EU Directives, national laws implementing Pillar 2 or DAC9 may vary in readiness or interpretation. Late implementing states may pose risks. |
- **Basis mismatches and double taxation** – mismatches in what counts as “income inclusion” or treatment of exclusions can lead to over-taxation or disputes. |
- **Documentation and audit risk** – tax authorities are likely to scrutinize effective tax rate calculations, exclusions, and the use of credits or deductions.
## Example Scenarios
- An EU-based tech group with subsidiaries in low-tax jurisdictions: Facing top-up liability under Pillar 2 where subsidiaries fall below minimum rate; must ensure group filing under DAC9 avoids duplication. |
- A financial firm with large profits: OECD estimates suggest good increases in effective tax rates; planning for excess profit taxes or surtaxes in various jurisdictions is prudent. |
## Best Practices Moving Forward
- Begin internal gap analysis now, before your next fiscal year closes.
- Map exposures by country and business line; engage in pre-filing quality controls. |
- Use advisory experts for contentious areas (e.g., related party income, carve-outs, digital activities). |
- Monitor EU implementation status in each Member State to anticipate divergent rules or delays. |
With DAC9 and Pillar 2 fully in force and OECD analysis showing high stakes, proactive EU multinationals will avoid costly surprises.