OECD Highlights Growing E-Invoicing Complexity

The OECD has highlighted the growing complexity created by the rapid expansion of e-invoicing and Digital Continuous Transactional Reporting (DCTR) mandates around the world.¹

In its new Tax Policy Reforms 2026 report, the OECD identifies e-invoicing and DCTR as increasingly important tools as tax administrations move towards more automated, data-driven VAT enforcement.

But there is a problem.

The OECD says the expansion of DCTR “has not occurred in an organised manner”, resulting in a high degree of variation between national regimes.

For multinational businesses, this means managing different architectures, data requirements, reporting obligations and implementation models across countries – increasing compliance complexity, legal uncertainty and operating costs.

The report points to the continued expansion of mandates across Europe and beyond, including developments in Belgium, France, Poland, Spain, Ireland, Norway, the UK, Singapore and the UAE.

The EU's ViDA reforms will accelerate the move further. Cross-border B2B Digital Reporting Requirements based on e-invoicing will apply from 1st July 2030, while Member States have been able to introduce domestic mandatory e-invoicing without a VAT derogation since April 2025.

The OECD has already started addressing the fragmentation issue. In January 2026, it published dedicated guidance on the design and operation of DCTR regimes, with interoperability and reducing unnecessary compliance burdens among the key considerations.

As more countries move towards mandatory e-invoicing and transactional reporting, the question is increasingly not whether these regimes will expand, but how far they will converge.

Sources

¹ OECD, Tax Policy Reforms 2026, 8th September 2026

² OECD, Digital Continuous Transactional Reporting for Value Added Tax, January 2026

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