Tax substance requirements have become mathematically quantified

The global minimum tax (Pillar 2) transformed substance from a qualitative judgment into a formula-based calculation. The Substance-Based Income Exclusion (SBIE) allows MNEs to exclude from top-up tax calculations an amount equal to 5% of eligible payroll costs plus 5% of tangible assets in each jurisdiction. Transitional rates remain higher through 2033 (9.6% payroll, 7.6% tangible assets in 2025), creating immediate incentives to demonstrate real operational presence. For capital-intensive businesses, this exclusion can eliminate top-up tax exposure entirely—€100 million in payroll and tangible assets generates €16 million in excluded income at 2025 rates.

Implementation has accelerated rapidly. As of late 2025, 65 countries have introduced Pillar 2 legislation, with 22 of 27 EU Member States implementing both the Income Inclusion Rule (IIR) and Qualified Domestic Minimum Top-up Tax. Only Estonia, Latvia, Lithuania, Malta, and Slovakia have opted for the permitted six-year deferral. Cyprus, Poland, Portugal, and Spain implemented with delay but retroactive effect for 2024. The OECD projects approximately 90% of in-scope MNEs will be subject to the 15% minimum tax by the end of 2025.

The EU’s proposed Anti-Tax Avoidance Directive III (ATAD III/Unshell Directive) adds a separate substance framework targeting shell entities, though it remains stalled in the EU Council awaiting unanimous approval. Under the proposal, entities meeting all three “gateway tests” must demonstrate minimum substance indicators or face denial of treaty benefits and EU directive exemptions. The cumulative gateway criteria are: (1) more than 65% of revenue from passive income (dividends, interest, royalties) over the preceding two years, (2) cross-border character with more than 55% of assets outside the member state or 65% of income from cross-border transactions, and (3) outsourcing of administration and decision-making to third parties. Entities triggering these gateways must prove they have own premises (or leased for exclusive use), at least one active EU bank account, and at least one qualified director who is EU tax resident and not serving on more than four unassociated entity boards. Penalties proposed reach 2-4% of annual revenue for false declarations.

Jurisdiction-specific substance creates a four-tier compliance landscape

Cyprus requires “management and control” to be exercised locally for tax residency, assessed through: majority of directors being Cyprus tax residents with real authority, board meetings held in Cyprus(minimum one annually with all directors physically present), local employees registered with Cyprus Social Insurance, commercial office space (not virtual addresses), and local bank accounts with resident signatories. The February 2024 circular increased transfer pricing thresholds—€5 million for financing transactions, €1 million for others— providing some administrative relief. Costs for maintaining local directors and office space typically run €15,000-40,000 annually.

Netherlands implemented a critical 2020 change that stripped substance requirements of their former safe harbor status. Meeting Dutch substance criteria now only shifts the burden of proof to tax authorities rather than guaranteeing treaty access. The complete requirements include: at least 50% of statutory board members with decision-making powers residing in the Netherlands, these Dutch-resident directors having at least equal powers to non-residents, a minimum €100,000 in salary costs related to holding activities for financial service companies, equipped office space (required for minimum 24 months), bookkeeping performed locally, and most important bank accounts maintained in the Netherlands. The Conditional Withholding Tax on interest and royalties (from 2021) and dividends (from January 2024) at 25.8% applies to payments to affiliated companies in low-tax or EU-blacklisted jurisdictions unless anti-abuse tests are satisfied.

UAE fundamentally restructured its substance framework in 2024. Cabinet Decision No. 98 of 2024 discontinued Economic Substance Regulations (ESR) entirely for financial years beginning January 1, 2023 or later, canceling all related notification, reporting, and penalty obligations. Substance requirements have effectively migrated to the Corporate Tax regime’s Qualifying Free Zone Person (QFZP) status, which provides 0% tax on qualifying income. To claim QFZP benefits, entities must: undertake Core Income-Generating Activities (CIGA) within the Free Zone, maintain adequate assets and qualified full-time employees locally, incur adequate operating expenditures, derive income from qualifying activities, and prepare mandatory audited financial statements. Non-qualifying revenue must remain below AED 5 million or 5% of total revenue. Critically, the regulations specify that “rubber stamping” or mere execution of decisions taken elsewhere does not qualify—for holding companies, board decisions must demonstrably occur within the Free Zone. Losing QFZP status triggers 9% Corporate Tax on all income and disqualification from 0% treatment for the subsequent four tax periods.

Luxembourg applies Circular L.I.R. 56/1 requirements to intra-group financing companies: majority of board members binding the company must be Luxembourg resident, key management decisions must be adopted in Luxembourg, at least one general meeting annually held locally, qualified personnel able to control financing transactions, and only functions without significant impact on risk control may be outsourced. The participation exemption (0% on qualifying dividends and capital gains) requires 10% shareholding or €1.2 million acquisition cost (€6 million for capital gains) held for minimum 12 months. Post-ATAD GAAR provisions mean dividends from “non-genuine” arrangements targeting tax advantages may be denied exemption regardless of technical compliance.

Banking compliance evolved into a substance verification gatekeeping function

The EU’s new AML package published June 19, 2024 represents the most significant regulatory overhaul in a decade. Regulation (EU) 2024/1624 creates a directly-applicable Single Rulebook across all member states (effective July 10, 2027), while the EU AML Authority (AMLA), headquartered in Frankfurt and operational from July 1, 2025, will directly supervise approximately 40 high-risk financial entities operating cross-border in six or more member states from 2028. Enhanced beneficial ownership transparency requirements now extend to non-EU legal entities and arrangements, with central registers required to interconnect via the European Central Platform by July 10, 2025.

The EBA’s draft Regulatory Technical Standards on customer due diligence (2025 consultation) explicitly define complex ownership structures to include any structure where customer and entities in ownership layers are in different jurisdictions, even within the EU. Assessment must consider “all shareholdings on every level of ownership.” Control includes any “significant influence”—not merely majority ownership.

Banks and fintechs apply specific substance verification during onboarding. Revolut Business requires for holding companies: a complete list of subsidiaries with ≥25% ownership, description of each subsidiary’s business nature, country of incorporation, proof of business activity (website, regulatory verification, contracts), full ownership chart to all UBOs, and director identification. Wise Business explicitly states it is designed for cross-border payments, not for storing large balances—accounts maintaining significant balances without expected transaction patterns face enhanced compliance review and potential closure.

Common account rejection reasons related to substance include: holding companies without trading activities and insufficient proof of fund flows, complex ownership structures that cannot be fully verified, missing documentation (especially subsidiary lists and unclear ownership chains), no proof of genuine economic activity (lacking websites, contracts, invoices), and unexplained geographic distance in business relationships. Moody’s identifies seven shell company indicators banks screen for: directorship outliers (individuals with thousands of appointments), mass registration addresses, jurisdictional risk mismatches between director nationality and company location, financial anomalies (millions in revenue with few employees), dormancy patterns followed by sudden activity, circular ownership, and absence of digital presence.

Typical documentation packages for holding company bank account opening require: certificate of incorporation, articles of association, register of directors and shareholders, ownership chart to all UBOs with ID verification, full subsidiary list with business descriptions and proof of activity, proof of operating address (not virtual offices), source of funds/wealth documentation, financial statements, and existing bank statements. Timeline expectations: 24-48 hours for standard fintech review, 5+ business days for complex structures at Revolut, and up to four months for traditional banks according to Thomson Reuters surveys.

Investor due diligence now treats substance as a valuation variable

The ILPA Due Diligence Questionnaire 2.0 has become the de facto industry standard for PE/VC fund evaluation, with governance and substance sections covering: ownership structure including percentage ownership, vesting schedules, and changes over five years; organizational charts showing management structure; key person provision specifics and succession planning; and ESG integration including tax transparency. The PwC Global Investor Survey 2024 found 18% of investors cite tax transparency as a top non-financial factor—nearly equal to health, safety, and wellbeing considerations.

Tax due diligence typically spans 1-3 months (up to six for complex deals), reviews 3-5 years of historical returns, and proceeds through document collection, management interviews, and analysis/reporting phases. Transfer pricing documentation receives particular scrutiny: investors verify policies exist and are documented, intercompany agreements reflect actual operations, CbC reports are current for all jurisdictions, IP is located where DEMPE functions occur, and prior TP audit outcomes.

Identified deal-breakers related to substance include: complex/aggressive tax structures difficult to unwind, significant underpaid sales tax exposure, missing transfer pricing documentation, seller’s deferred tax liability on cash basis accounting, years of non-compliance, and legal structures too complicated to restructure. One practitioner observation: “Sometimes M&A deals fall apart because a target company does not have its sales tax house in order.”

Valuation impacts manifest through purchase price adjustments and risk allocation mechanisms. Tax risks can be treated as debt-like items in the equity bridge (buyer preference—immediate price reduction) or addressed through special tax indemnities (seller preference—avoids price cut but creates counterparty risk). Market standards show: escrow holdbacks of 10-20% of purchase price (average 9.14% per ABA surveys), escrow duration of 12-24 months for general matters extending to 6-7 years for tax representations, and transfer pricing risks typically requiring 1-5% additional premium if insurable through specialty tax insurance.

Standard SPA representations related to substance include: all taxes due properly paid, no pending tax audits, financial statements prepared per GAAP, all tax returns filed timely and accurately, transfer pricing at arm’s length, and legal entity structure accurate as described. Tax survival periods typically extend 3-7 years, substantially longer than general representations.

The three perspectives diverge on identical indicators

Divergence patterns create planning challenges. A structure can satisfy tax substance (resident directors, local premises) but fail banking verification when source of funds cannot be documented or transaction patterns trigger AML red flags. Conversely, a structure with pristine KYC compliance can lose treaty benefits when beneficial ownership tests reveal economic substance lies elsewhere. Investor-approved governance may still face tax authority challenge when functions are outsourced or decisions made outside the jurisdiction.

The common elements satisfying all three include: documented beneficial ownership through to natural persons, genuine business rationale articulated beyond tax benefits, local decision-making with evidence (minutes, resolutions, attendance records), qualified personnel with appropriate capacity, and adequate operational infrastructure (premises, bank accounts, systems).

Enforcement intensity reached unprecedented levels in 2024-2025

Tax authority enforcement has become AI-driven and coordinated. The DAC6 Central Directory accumulated 60,734 reportable arrangements by November 2024, with approximately 50% involving non-EU countries. Joint audit provisions became effective January 1, 2024 under DAC7, enabling coordinated multinational examinations. The Common Reporting Standard now covers 154 jurisdictions, with the new Crypto-Asset Reporting Framework (CARF) extending coverage to digital assets. AI deployment in tax administration now spans 29 of 38 OECD members: the IRS uses machine learning for audit selection, Greece deploys satellite imagery to detect undeclared property, France identifies undeclared constructions, and Italy cross-references banking data against tax filings.

AML penalties reached historic highs. TD Bank’s $3.09 billion penalty (October 2024)—the largest US AML fine ever—resulted from “chronic failures” enabling drug cartel transactions. Binance paid $4.3 billion in 2023. Global AML fines totaled approximately $6.6 billion in 2023, up 57% year-over-year. Bank of America received an OCC cease-and-desist order in January 2025 for BSA/AML deficiencies.

FATF gray list changes continue affecting structure planning. Monaco was added in June 2024 (notable given its wealth management industry), along with Venezuela, Algeria, Angola, Côte d’Ivoire, Lebanon, Nepal, Laos, Bolivia, and the British Virgin Islands. The UAE, Turkey, Jamaica, Philippines, and Croatia were removed after remediation. Gray-listing triggers mandatory enhanced due diligence for all entities in listed jurisdictions and systematic banking relationship challenges.

What to expect in 2025-2026

The ATAD III Unshell Directive likely advances through a two-stage approach: automatic information exchange based on agreed hallmarks first, with domestic tax consequences deferred pending further negotiation. Even without final adoption, the proposed gateway tests and substance indicators are influencing tax authority audit practices across the EU. The two-year lookback period means historical substance decisions made today will face scrutiny once legislation passes.

Pillar 2’s UTPR implementation creates new compliance challenges as jurisdictions can now tax undertaxed profits of entities in other countries. The first GloBE Information Returns for calendar-year companies become due June 30, 2026for FY 2024, with top-up tax payments due August 31, 2026. Expect significant administrative guidance refinements as practical implementation issues emerge.

Banking de-risking continues evolving from blanket category exclusions toward technology-enabled risk-based assessment. ISO 20022 structured data adoption enables enhanced detection capabilities. Fintechs increasingly compete on compliance sophistication rather than simply speed.

Technology documentation becomes essential for audit readiness. Digital document management systems, automated compliance monitoring, and audit trails for key decisions will be expected rather than exceptional. Companies should prepare for AI-driven regulatory scrutiny by ensuring their own documentation and control systems can demonstrate substance through data rather than assertions.

How the three verification frameworks align and diverge

The following comparison table synthesizes the practical implications for each stakeholder’s substance assessment:

The critical insight for structure planning is that adequacy must be demonstrated to all three stakeholders simultaneously. Tax planning that achieves treaty benefits but creates banking access problems or investor concerns achieves nothing. The modern standard requires: substance sufficient for Pillar 2 SBIE optimization and ATAD III compliance, documentation comprehensive enough for bank account opening and maintenance, and governance robust enough to survive investor due diligence and support exit valuations. Structures designed without this triangulated verification in mind face escalating risks of failure at each subsequent checkpoint.

#Substance #Compliance #BankReady #InvestorReady #EU #Liglex

Author by Lipatnikov Sergey