From 2027, the Hungarian tax authority’s ÁNYK system will be phased out, making it necessary to seek new solutions. Machine-to-machine technology represents one of the most obvious next steps, especially for large enterprises with complex reporting duties. Naturally, small taxpayers with fewer transactions and private individuals will not be left without the possibility to submit tax returns either; they will have access to Onya (the online form-filling application), an e-PIT webpage (for personal income tax submissions), and an e-VAT webpage.
The essence of M2M technology is that two systems, such as a company’s accounting software and the system of the Hungarian Tax and Customs Administration (NAV), communicate directly via an application programming interface. This eliminates errors arising from manual data entry, accelerates processes, and ensures data accuracy.
Consider a large company that processes several thousand invoices each month. Without automation, each tax return requires manual uploading, review, and correction, making the process time-consuming and prone to errors. With M2M, these steps are fully automated: the system could perform internal validation, flag potential discrepancies before submission (in the case of e-VAT M2M, these steps are partly done by NAV), and then transmit the data directly to the tax authority. As a result, reporting time could be reduced from hours to minutes.
M2M technological developments not only automate data submission but also manage various customer and supplier relationships. E-VAT M2M is a highly effective alternative for companies preparing complex VAT returns with multiple M-sheets, K-sheets, and other related forms.
The system ensures that only error-free, verified data is transmitted to NAV. Consequently, the process reduces administrative burdens and minimizes costly errors, thereby significantly lowering the risk of potential penalties.
• Time savings: Automated submission eliminates manual uploads;
• Accuracy: Pre-validation prevents errors and ensures compliance;
• Security: Encrypted data transmission and audited processes;
• Future readiness: M2M prepares companies for the mandatory transition in 2027;
• Competitive advantage: Automation enables faster and more efficient operations;
• Visualized data reports: Support the optimization of decision-making processes.
According to industry surveys, automated VAT return systems can reduce administrative burdens by up to 70% and decrease error rates by up to 90% compared to manual processes.
Although 2027 may seem distant, implementing a well-functioning M2M solution requires thorough preparation. It is therefore advisable to begin planning and carefully assessing available options in due time. Several advisory firms already offer software solutions for automated tax return preparation; one such provider is WTS Klient.
Implementing M2M is not merely a competitive advantage; it is a prerequisite for full compliance with future e-VAT and modern tax submission requirements. WTS Klient offers not only a technological solution but comprehensive support. By combining in-house tax advisory and IT expertise, it assists companies in undertaking the transition to an interface optimized for their needs. From system integration to ongoing operations, WTS Klient ensures smooth functioning at every step.
WTS Klient is ready to act as a strategic partner in this digital transformation, whether it involves system integration, data validation, or continuous support within an efficient and secure operational environment.
This article was first published in the Budapest Business Journal print issue of February 27, 2026.
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