Taxing the Untouchable: Comparative Enforcement Challenges in the Digital Economy

The rapid expansion of the digital economy has disrupted traditional tax systems, creating significant compliance and enforcement challenges. As cryptocurrencies and platform-based activities proliferate, tax authorities face increasing difficulty in monitoring income that is often pseudonymous, borderless and self-reported. This article examines how tax enforcement systems respond to two key sources of digital tax opacity: crypto-asset transactions and platform-mediated income. It adopts a comparative analysis of five jurisdictions: the United States, the United Kingdom, the European Union and two Gulf Cooperation Council states, the United Arab Emirates and Saudi Arabia.The findings reveal substantial divergence in regulatory approaches driven by differences in legal design, institutional capacity and policy priorities. Persistent gaps in third-party reporting, legal classification and cross-border data-sharing frameworks continue to constrain effective enforcement. The article argues that effective digital tax enforcement depends on aligning reporting systems, legal definitions and administrative capacity and highlights the need for greater convergence in reporting standards and enhanced international cooperation.