Slovakia clarifies e-invoicing obligations ahead of 2027

Slovakia has started providing businesses with much-needed clarity ahead of its mandatory e-invoicingElectronic invoicing - widely referred to as e-invoicing - is the exchange of a digital document between a supplier and a buyer. E-invoices are issued, transmitted and received in a structured data format that enabled automatic and electronic processing. They contain data in a machine-readable format so that an AP system can read an invoice without manual data entry, leading to faster and more efficient invoicing. rollout in January 2027, and the latest guidance gives a clearer picture of how the country intends to operate its future digital reporting regime.

The new rules form part of Slovakia’s wider VAT digitalisation strategy, introducing structured e-invoicing alongside transaction-level reporting requirements.

But while the direction of travel has been known for some time, businesses have been waiting for practical clarification around scope, exemptions and technical requirements,

What Slovakia has confirmed

Under the current framework, mandatory e-invoicing will apply from 1st January 2027 for domestic B2B and B2GCommerce between business to government. transactions involving Slovak VAT payers. Invoices will need to be issued, exchanged and archived in a structured electronic format compliant with the European EN 16931 standard.

The guidance also confirms several important exemptions and implementation details that businesses will want to pay close attention to.

For example:

• Non-VAT registered businesses will not be required to issue e-invoices, although businesses actively carrying out economic activity may still need to be capable of receiving them
• VAT-exempt supplies falling under specific sections of the Slovak VAT Act will sit outside the obligation
• Foreign businesses that are VAT registered in Slovakia, but do not have a permanent establishment there, will be temporarily excluded from the mandate until 30^th  June 2030

That final point is particularly interesting.

At a time when several EU member states are debating how far domestic mandates should extend to non-resident businesses, Slovakia appears to be taking a more phased approach by initially limiting the scope to domestic taxpayers only.

Timeline

2026 – Voluntary onboarding and testing phase

2027 – Mandatory e-invoicing and transaction level digital reporting for domestic B2B and B2G transactions

Until 30th June 2030 – Invoice issuance deadline is within 15 days from the tax point

From 1st July 2030 – 

• Extension of the system to intra-EU cross border transactions
• Reduction of invoice issuance deadline to 10 days
• Harmonisation of reporting obligations
• Replacement of traditional VAT reporting tools with automated reporting via the e-invoicing system

Peppol is expected to sit at the centre of the model

Slovakia’s framework is expected to operate through a Peppol-based infrastructure, with accredited service providers acting as the exchange layer between trading partners and the tax administration.

In practical terms, this means businesses may need far more than simple invoice generation capability.

Many organisations will need to assess:

• ERPEnterprise resource planning (ERP) is a type of software that organisations use to manage main business processes. integration readiness
• Structured data quality
• Supplier and customer onboarding
• XMLExtensible Markup Language is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. transformation capability
• Peppol connectivity
• Invoice archiving controls
• Reporting workflow governance

And importantly, these projects often take significantly longer than businesses expect – particularly where multiple ERP systems, shared service centres or international entities are involved.

Are businesses leaving enough time?

Although January 2027 may still feel some distance away, the reality is that many organisations are already behind where they should be.

Projects involving ERP changes, Peppol integration, tax determination logic and reporting controls rarely move quickly, especially once internal stakeholders, procurement cycles and testing phases are factored in.

The businesses that start preparing early will almost certainly be in a stronger position than those waiting for final technical specifications before taking action.

At Innovate Tax, we help businesses navigate complex global e-invoicing and digital reporting mandates, including building a roadmap for future mandates and assessments of your operating model per country. You can find out more about our e-invoicing services here.