Global E-Invoicing Mandates and Regulatory Fragmentation: Compliance Cost Implications for Multinational Enterprises' ERP Architecture

Abstract

Purpose: Mandatory electronic invoicing programmes have proliferated across 23 countries since 2019, yet the structural cost burden these mandates impose on multinational enterprises (MNEs) has not been quantified at the firm level. This study tested how regulatory fragmentation, ERP integration complexity, centralised governance capability, and interoperability standard adoption jointly determine MNE e-invoicing compliance costs.

Methods: A structured survey of 342 tax technology and ERP professionals across MNEs operating in three or more e-invoicing jurisdictions was analysed using consistent partial least squares structural equation modelling (PLSc-SEM, SmartPLS 4.0), Hayes PROCESS macro Model 14 for moderated mediation (5,000 bootstrap resamples), and two machine learning classifiers (Random Forest, XGBoost) with SHAP attribution. Necessary Condition Analysis and Importance-Performance Map Analysis supplemented the structural results.

Findings: The Regulatory Fragmentation Index (RFI) produced the largest direct path to compliance cost (beta = 0.51, p < 0.001), ahead of ERP integration complexity (beta = 0.38). ERP adaptation effort partially mediated the RFI-cost relationship (indirect = 0.18, 95% CI [0.11, 0.26], VAF = 35.3%). High centralised governance capability reduced the conditional indirect cost effect by 58% relative to low-capability firms (0.11 versus 0.26). Both machine learning models confirmed the SEM variable ranking (RF AUC = 0.87; XGBoost AUC = 0.89).

Implications. Regulatory fragmentation, not ERP scale or age, drives the cost differential among MNEs. Governance investment in centralised mandate tracking, shared integration architecture, and master data standards produces a measurable return equivalent to cutting conditional indirect compliance costs by more than half. Interoperability standard adoption reduces costs directly but does not substitute for mandate-level harmonisation.