Episode Details

Mandatory Disclosure Rules (MDR) were designed to give tax authorities early visibility into avoidance structures. But in practice, the regime has faced growing criticism—ranging from limited effectiveness to overreach and complexity.

In this episode, we break down the key concerns being raised by practitioners.

📉 1️⃣ Lack of Enforcement Outcomes

One of the most striking criticisms:

• No widely publicised cases

• No identified loopholes closed through MDR disclosures

• No meaningful enforcement against intermediaries

👉 This raises questions about whether MDR is delivering practical results or simply generating data.

🌍 2️⃣ Limited Global Participation

Although MDR is promoted by the

Organisation for Economic Co-operation and Development, adoption remains uneven.

Key issue:

• Only a limited number of jurisdictions (primarily the EU) actively apply MDR

This creates gaps where:

• Non-participating intermediaries can operate freely across borders

• Structures can be marketed outside MDR jurisdictions

⚖️ 3️⃣ Exclusion of Key Intermediaries

Ironically, some of the most important actors may fall outside reporting:

• Lawyers, due to legal professional privilege

• Intermediaries in non-MDR jurisdictions

👉 Result:

• The regime may miss primary designers or promoters of structures

📊 4️⃣ Overly Broad Scope

MDR’s definition of a “reportable taxpayer” is extremely wide.

In practice:

• Even potential clients may trigger reporting

• Promoters may need to report individuals who never proceed with a structure

👉 This creates:

• Administrative burden

• Reporting of hypothetical arrangements rather than real ones

⏳ 5️⃣ Retroactive Application Concerns

MDR rules can apply retroactively, in some cases dating back to October 2014.

This raises legal concerns:

• Potential conflict with ex post facto principles

• Reporting obligations imposed on past behavior

• Uncertainty for intermediaries who acted before rules were clear

🌐 6️⃣ Extraterritorial Reach

MDR attempts to apply across borders, including:

• Reporting obligations involving foreign intermediaries

• Disclosure requirements beyond domestic jurisdiction

Critics argue:

• Most legal systems limit extraterritorial reach to serious offences

• MDR extends this concept into tax compliance and reporting

🔗 7️⃣ Reporting the Entire Chain

MDR may require disclosure of:

• Upstream intermediaries

• Downstream intermediaries

• Clients and potential clients

—even where:

• No direct relationship exists

• No services were provided

👉 This creates practical and legal challenges, particularly around data access.

🔁 8️⃣ Ongoing Reporting Risk

Even dormant structures may trigger reporting:

• A structure designed years ago may become reportable if later reused

• Intermediaries may face obligations long after initial involvement

👉 This creates open-ended compliance exposure.

🪙 9️⃣ Scope Beyond Financial Accounts

MDR can apply to structures involving:

• Real estate

• Gold

• Chattels

• Operating businesses

👉 This goes beyond CRS, which focuses primarily on financial accounts.

⚖️ 10️⃣ MDR vs GAAR

Compared to traditional rules like the General Anti-Avoidance Rule (GAAR):

• MDR provi