The European Commission released its final evaluation report on the Anti-Tax Avoidance Directive on 25 June 2026, assessing ATAD's effectiveness from 1 January 2019 to mid-2025 and finding implementation differences across Member States amid estimated EU-wide compliance costs of EUR 25–27 billion.
The European Commission has published its final evaluation report on the Anti-Tax Avoidance Directive (ATAD) on 25 June 2026, covering the period from 1 January 2019 to mid-2025. The report assesses the effectiveness of ATAD in meeting its objectives and examines whether the measures remain suitable for addressing current tax avoidance challenges.
Purpose and scope of the evaluation
The main objectives of the evaluation are to:
- Assess the implementation of ATAD across Member States;
- Evaluate the functioning of ATAD based on the European Commission’s “Better Regulation” criteria: effectiveness, efficiency, relevance, coherence, and EU added value;
- Examine whether ATAD requires further adaptation to remain effective in the future.
The evaluation is based on an external study prepared for the European Commission, as well as additional sources, including feedback from the Call for Evidence on the evaluation of ATAD and data collected from Member States and private stakeholders.
Key findings
The evaluation found that ATAD has successfully established a common EU framework to combat tax avoidance and reduce regulatory fragmentation. Before ATAD, Member States had differing anti-tax avoidance rules, particularly on interest deductibility, CFC rules, exit taxation, and hybrid mismatches.
While ATAD helped limit tax arbitrage and strengthen national tax bases, the flexibility allowed in implementation created differences between Member States, leading to complexity and legal uncertainty. The Directive has influenced corporate tax planning, with the Interest Limitation Rule having the greatest impact.
Implementation has also increased compliance costs for businesses, estimated at EUR 25–27 billion for one-off costs across the EU, with ongoing costs related to documentation and compliance processes. Overall, ATAD remains an important tool for maintaining minimum anti-tax avoidance standards in the EU, though further improvements may be needed.
Lessons learned
The evaluation has concluded the following on the five individual measures:
Interest limitation rule
The Interest Limitation Rule is generally considered by stakeholders to be the most impactful ATAD measure. However, challenges remain regarding its effectiveness, as it is viewed as insufficiently targeted and not fully aligned with current economic realities. It may also restrict genuine business activities within the EU. The flexibility granted to Member States has contributed to significant differences in implementation.
Exit taxation rule
The Exit Taxation Rule has not shown significant effects in protecting tax bases, while compliance and implementation costs for tax authorities and businesses have remained relatively limited. The main practical challenge concerns the valuation of assets, particularly intangible assets.
General anti-abuse rule (GAAR)
The GAAR serves as an important safeguard against evolving tax avoidance strategies and is generally considered necessary. However, differences in interpretation and application, including uncertainties arising from recent CJEU case law and the unclear scope of the rule, have created legal uncertainty and raised questions about alignment with other EU initiatives, such as Pillar 2.
Controlled foreign company (CFC) rule
The CFC Rule appears to have its strongest impact through its deterrent effect, making its quantitative effectiveness difficult to measure. Stakeholders have highlighted significant administrative burdens, which are increased by fragmented implementation across Member States. Some taxpayers consider the introduction of Pillar 2 to have reduced the relevance of CFC rules, especially for groups covered by Pillar 2.
Hybrid mismatch rules
Hybrid Mismatch Rules are considered the most innovative element of ATAD. Although they are rarely applied due to their preventive effect, they can effectively increase corporate taxation and protect tax bases when triggered. However, their complexity—particularly regarding imported mismatches—creates challenges for both tax authorities and taxpayers.
While ATAD and its objectives remain relevant, improvements may be needed through legislative amendments and administrative guidance to make the rules more targeted, reduce compliance burdens, and achieve a better balance between costs and benefits. Addressing these challenges could also support EU competitiveness by reducing tax barriers to cross-border business activities within the internal market.
