By 2025, tax avoidance will be a complex cross-border issue that will seriously undermine the stability of the global tax system. MNCs and the ultra-high net worth will be able to exploit differences between domestic and foreign treaty provisions far more than they do now. Some major tech multinationals have already used the 'Double Irish with a Dutch Sandwich' to route their profits to jurisdictions with very low or zero tax, resulting in a massive reduction in their tax bill even though they have generated huge sales in high-tax countries. It's perfectly legal, of course, but it massively erodes the tax base, distorts the market, and is particularly damaging to developing economies that rely on corporate tax. The OECD (2024) suggests that the way forward is to strengthen General Anti-Avoidance Rules (GAAR), fix structural gaps, and improve global transparency through better information sharing and co-operation on the rules.
GAAR and Its Role in Contemporary Tax Regulation
The General Anti-Avoidance Rule (GAAR) permits the tax authorities to disregard any arrangement or transaction which is not genuine and is primarily entered into for the purpose of obtaining tax advantages. It is broader and more flexible than the Specific Anti-Avoidance Rules (SAAR), which are designed to deal with specific schemes. GAAR is designed to cover new and unforeseen avoidance arrangements.
The vast majority of countries have some form of GAAR. India introduced GAAR under the Income Tax Act, 1961 from FY 2017-18. The UK has a General Anti-Abuse Rule in the Finance Act 2013, Canada has it in section 245 of its Income Tax Act, and Australia has it in Part IVA of the Income Tax Assessment Act 1936. In all of these cases, significant enforcement problems remain due to weak administration, the protracted nature of litigation, and the strictness of the rules, which in turn diminishes the effectiveness of GAAR as a deterrent (Tax Justice Network, 2023).
Strengthening GAAR and Closing Enforcement Gaps
So many tax authorities are not in a position to apply GAAR to complex multinational groups. The problems are essentially ones of resource and of definition. They don't have the resources to investigate; the definitions of what constitutes "impermissible avoidance" are very narrow; and court backlogs are such that justice is not going to be delivered. The way to address this is to increase resources for tax administration offices and invest in training for enforcement staff. You also need to look at the legislation, clarify the definitions of what is and isn't impermissible avoidance under GAAR, and review the legal framework to see how you can get fast-track court procedures. That would go a long way toward alleviating the backlog and would, in fact, strengthen the deterrent. That's the way to make GAAR work.
To make GAAR more effective, it's necessary to broaden its scope to cover hybrid instruments, profit-splitting arrangements and transactions in the digital economy. Governments will need to use data analytics and AI in their monitoring systems to identify unusual cross-border transactions in real time (PwC, 2024). Dedicated GAAR tribunals or benches should also be established to accelerate dispute resolution and provide greater legal certainty for both the regulator and the taxpayer.
Legislative Changes to Close Structural Loopholes
Tax evasion largely results from weaknesses in the old Double Taxation Avoidance Agreements (DTAAs), hybrid mismatch arrangements, and hidden control structures behind beneficial ownership. These factors allow BEPS to continue eroding tax bases and reducing government revenue.
To fix these issues, countries should renegotiate their tax treaties to include Principal Purpose Tests and other anti-abuse rules designed to prevent treaty shopping. They should require public registers of beneficial ownership as a matter of course. The use of digital taxation models based on the OECD's Pillar One and Pillar Two proposals will be key to ensuring that multinationals are taxed fairly in the global digital economy.
Practical examples already exist in the EU's Anti-Tax Avoidance Directive (ATAD), which covers both hybrid mismatch and the Controlled Foreign Company (CFC) rules, and India's GAAR, which focuses on "commercial substance" and effectively prohibits tax-planning structures. Taken together, they represent a move towards greater responsibility and justice in international taxation.
Strengthening Worldwide Cooperation and Information Exchange
Tax avoidance is a cross-border phenomenon, so isolated measures will not be sufficient. You need real co-operation on a multilateral basis to identify the structures and flows of money used to avoid tax. The OECD's Common Reporting Standard (CRS) is a good example of a global initiative which has enabled the automatic exchange of financial account information between tax authorities (OECD, 2014). The U.S. Foreign Account Tax Compliance Act (FATCA) requires US persons to report their foreign accounts, and Tax Information Exchange Agreements (TIEAs) allow for the exchange of information on a bilateral or ad hoc basis.
In the short term, the focus should be on adopting CRS rules everywhere (including in the traditional tax havens) and setting up secure electronic dashboards for data sharing. Institutional capacity needs to be strengthened through training, digital forensics and audit technology (particularly in the emerging economies).
Why Developing Countries Need Priority Support
Developing countries are the ones most affected by tax evasion, losing an estimated USD 200bn per year to aggressive corporate tax planning and illegal financial flows (Tax Justice Network, 2023). The impact is immense in terms of the revenue that is not available to governments to invest in public services, the effect on inequality, and the impact on the ability to achieve the SDGs. The developing world also faces a range of challenges in how it collects taxes, including poor tax-collection infrastructure, a lack of tax law and expertise, and a shortage of trained personnel to identify and stop sophisticated tax avoidance. They are also at a disadvantage in treaty negotiations with more developed countries and, as a result, are not in a strong position to secure a fair deal on tax sharing.
To address these issues, the OECD and the UN should extend their capacity building (training, toolkits, model GAARs, etc.) to developing countries. They should simplify compliance advice and be more open about what they're doing, notably in the context of trade and investment agreements. That would go a long way toward making the global tax system fairer.
Creating a Sustainable and Fair Tax Future
Moving to a fair and efficient tax system by 2025 will require a concerted effort focused on fairness, efficiency and global co-operation. A stronger GAAR is not simply a technical process; it is an economic and ethical necessity, fundamental to building public faith in how we manage our finances.
Key Policy Recommendations:
- Expand the scope of GAAR to cover new tax avoidance arrangements such as hybrid instruments and electronic transactions.
- Close the structural loopholes in the tax treaties via the introduction of Principal Purpose Tests and anti-abuse clauses.
- Invest in better resources, better training and fast-track legal procedures for the tax authorities to improve enforcement.
- Promote the use of digital tools, data analysis and artificial intelligence to enable more effective international monitoring and information sharing.
- Strengthen the public register of beneficial ownership and guarantee transparency of financial flows.
- Support developing countries through capacity building, toolkits and simplified compliance guidance.
Taken together, these steps will go some way toward creating a more stable, fair, and accountable global tax system.
Countries need to extend the scope of GAAR, keep the law up to date, close loopholes, and assist developing countries with enforcement and capacity building. Fiscal openness should be at the heart of the global financial system, and that is how you achieve a more stable, fair and accountable financial order.