E-invoicing is only the first step: Why VAT data reconciliation has become a strategic priority

As e-invoicing and digital reporting requirements expand across Europe, businesses face a challenge that goes well beyond regulatory compliance: ensuring that the information flowing through their internal systems is accurate, consistent and reliable. 

The progressive introduction of mandatory e-invoicing and digital reporting requirements is fundamentally changing how businesses manage their indirect tax obligations.

However, having a technology solution capable of generating and transmitting electronic invoices in the required formats does not necessarily guarantee the accuracy or completeness of the underlying VAT information.

A recent research into digital tax compliance, highlights a challenge that many businesses face: the adoption of digital reporting technology is not always accompanied by equivalent improvements in internal data validation and reconciliation processes.

This distinction is particularly important for multinational businesses, where transactional information may originate from different ERP environments, business units and jurisdictions.

 

The operational gap: digital reporting does not guarantee data accuracy

As tax authorities gain increasingly detailed access to transaction-level information, businesses must be prepared not only to submit the required data within the prescribed deadlines, but also to identify, explain and resolve discrepancies between their accounting records, electronic reporting and VAT returns.

In practice, reconciliation processes often continue to rely heavily on manual reviews, spreadsheet-based controls and information extracted from different systems.

This can create a significant administrative burden, particularly where large transaction volumes or multiple jurisdictions are involved.

Importantly, the underlying difficulties are not always attributable to the complexity of VAT legislation. They frequently arise from the way transactional information is generated, classified and processed within the organisation.

Our experience with Spain's Immediate Supply of Information (SII), one of Europe's longest-running real-time VAT reporting regimes, illustrates the kinds of issues that typically arise:

• Disconnected systems and data flows. Where invoicing, accounting and reporting run on different platforms, or across several ERP instances, the same transaction may be captured differently at each stage, and discrepancies often surface only when the VAT return is prepared.
• VAT classification inconsistencies. Under SII, each record must carry the correct invoice type and special regime key. When these are derived from tax codes configured differently across entities or applications, the same type of operation can end up reported in different ways.
• Timing mismatches. The four-day reporting deadline, the distinction between operation date and issue date, and the treatment of corrective invoices can all cause a transaction to fall in different periods in the electronic records and in the VAT return.
• Gaps and manual interventions. Missing invoices, incomplete counterparty data and manual adjustments made outside the ERP are frequent sources of differences that are difficult to trace after the fact.

These difficulties illustrate why implementing an e-invoicing solution should be regarded as one component of a wider digital transformation programme. Reliable VAT compliance also depends on the appropriate configuration of master data, the correct application of VAT determination rules and the effective integration of transactional and reporting systems.

 

Towards a multidisciplinary and preventive approach

Digital VAT compliance is increasingly becoming a shared responsibility across Tax, Finance and IT departments.

VAT specialists must understand how business transactions are recorded and processed within the company's information systems. Equally, IT professionals need to understand the tax implications of the data they are required to capture, transform and transmit. Neither discipline can effectively address these challenges in isolation.

DigitalVAT compliance is not purely a tax issue or an IT issue. It is a business transformation challenge that requires both disciplines to work as one. Traditionally, VAT reconciliation has been approached primarily as a retrospective exercise associated with the preparation of periodic VAT returns.

However, the expansion of digital reporting obligations and continuous transaction controls is creating a strong case for moving towards preventive controls embedded in the underlying business processes.

This evolution is particularly relevant in the context of the European Union's VATin the Digital Age (ViDA) initiative and the progressive introduction of national e-invoicing and digital reporting regimes.

Rather than relying exclusively on checks performed at the end of the reporting cycle, businesses should consider introducing validation mechanisms closer to thepoint at which transactions are initially recorded. Such controls can help identify incorrect VAT classifications, missing information and inconsistencies between systems before these affect electronic reporting or VAT returns.

This approach can reduce subsequent corrective work, improve the reliability of tax information and strengthen the organisation's ability to respond to enquiries from tax authorities.

 

The importance of adapting technology to business reality

One of the main challenges facing multinational businesses is that their existing information systems have generally evolved in response to operational, accounting and management requirements rather than the increasingly detailed demands of digital tax reporting.

Consequently, standard e-invoicing or reporting solutions may not always be capable of addressing the characteristics of a company's transactional flows without additional configuration, data transformation or integration work.

The starting point should therefore be an assessment of the existing information environment, identifying potential gaps between the data currently available and the information required for regulatory compliance. This assessment should involve both VAT and IT specialists and should consider not only the technical reporting requirements, but also the underlying tax treatment of transactions and the practical constraints of the company's systems.

Depending on the circumstances, the appropriate solution may involve adjustments to ERP configuration, additional validation controls, data mapping and transformation tools, or the integration of specialised external applications.

The objective should not necessarily be to replace existing systems, but to develop a compliance framework capable of working effectively with the company's actual technological and operational environment.

Looking ahead

The future of digital VAT compliance will not be determined solely by a company's ability to issue electronic invoices or transmit information to tax authorities, but it will increasingly depend on the quality, consistency and traceability of the data supporting those obligations.

For multinational businesses, the challenge is to establish scalable processes that connect commercial transactions, information systems and tax reporting requirements, while maintaining sufficient flexibility to accommodate regulatory developments across different jurisdictions.

Organisations that succeed in integrating preventive controls into their transactional processes will be better positioned to manage compliance risks, reduce operational inefficiencies and respond to the growing demands of digital tax administration.

Digital reporting moves the point of scrutiny closer to the transaction itself. Businesses that apply the same logic to their own controls, validating data where it is created rather than where it is reported, will be the ones best placed to meet that scrutiny with confidence.

 

Our approach at IVA Consulta

At IVA Consulta, our experience supporting multinational businesses with e-reporting issues arising from complying with Spain's Immediate Supply of Information (SII) has reinforced the importance of addressing VAT compliance and technology as interconnected disciplines.

Our multidisciplinary team combines specialised VAT expertise with in-house IT capabilities, allowing us to work alongside clients' Tax, Finance and IT departments when assessing the implications of new digital reporting obligations.

We focus on understanding how transactions are processed within the organisation, identifying potential limitations in the underlying data and helping businesses design practical solutions adapted to their existing systems.

Our work may include reviewing transactional data structures, mapping ERP information, defining VAT validation controls, supporting the integration of reporting solutions and developing interim compliance arrangements where a longer-term automation project cannot be completed immediately.

Where it creates measurable value, we also apply automation and AI-based tools to support data consolidation, validation and reconciliation, always under the supervision and professional judgement of our VAT and IT specialists.

This approach reflects a fundamental principle of our service model: technology should be adapted, wherever practicable, to the operational reality of the business, so that compliance solutions fit existing processes rather than the other way round.

By combining VAT advisory and technological expertise, we aim to help businesses move beyond the immediate implementation of regulatory reporting requirements towards more reliable, efficient and sustainable compliance processes. 

References:

The discussion in this article is grounded in our experience implementing SII solutions. propietary or others, for multinational groups. It also draws on recent developments in digital tax compliance, including key insights from Fintua's Reconciliation in the era of e-invoicing - 2026 Benchmark Report. The report draws on a survey conducted between August and September 2026 among tax, finance and other professionals involved in digital tax compliance and business transformation. Respondents represented organisations operating across multiple jurisdictions in Europe, the Middle East and Africa, Asia-Pacific, Latin America and North America, with varying levels of e-invoicing implementation.

Disclaimer:

The views and conclusions expressed in this article are those of IVA Consulta and reflect our approach to specialised VAT advisory and compliance services.References to the Fintua report are made solely for informational purposes and do not imply any affiliation with, or endorsement of our views by Fintua. All rights in the report remain with its owner.