Slovakia is moving from policy planning to a defined national e-invoicing and digital reporting framework. The current framework is based mainly on Act No. 385/2025, which amends the Slovak VAT Act, and the latest guidance published by the Slovak Financial Administration.
The new Slovak eFaktura regime should now be treated as an active compliance project. From 2026, businesses can prepare through voluntary implementation, testing and provider selection. From 1 January 2027, mandatory e-invoicing and related reporting will apply to domestic transactions in scope. From 1 July 2030, Slovakia plans to expand the regime to cross-border transactions and align the reporting model more closely with EU VAT in the Digital Age, or ViDA, requirements.
What is e-Invoicing in Slovakia?
E-invoicing in Slovakia refers to the creation, transmission, receipt and processing of invoices in a structured electronic format. Under the Slovak eFaktura framework, an e-invoice is not a PDF file, scanned invoice or image of a paper invoice. It is a structured XML document that can be automatically processed by accounting and tax systems.
The Slovak model is based on Peppol eDelivery and Peppol BIS, aligned with the European e-invoicing standard EN 16931. In practical terms, businesses will exchange structured invoices through certified delivery service providers, often described in Slovak materials as digital postmen. These providers enable the secure transmission and receipt of invoices between suppliers, buyers and the tax authority reporting layer.
From a compliance perspective, Slovakia’s model combines e-invoicing with electronic reporting. Invoice data will be communicated to the Financial Directorate either through the e-invoice delivery process or through the required electronic reporting mechanism, depending on the transaction type and implementation phase.
During the 2027-2030 domestic transition period, Peppol is the default route for e-invoicing and e-reporting. Current Slovak programme materials indicate that, where B2B parties do not use Peppol and mutually agree to exchange XML invoices in EN 16931 UBL, the non-Peppol B2B flow is not subject to e-reporting until 2030; during that period, the existing VAT Control Report remains mandatory.
What is B2B e-Invoicing in Slovakia?
B2B e-invoicing in Slovakia will become mandatory for domestic transactions in scope from 1 January 2027. During the transitional domestic phase, the obligation applies to domestic supplies of goods and services where the supplier is a Slovak VAT payer and the customer is a domestic taxable person or a domestic non-taxable legal person. The official guidance makes clear that, for the 2027 domestic phase, both the supplier and the customer must be domestic persons.
This means the 2027 phase should be understood as a domestic B2B e-invoicing and reporting mandate, rather than a general mandate covering every invoice issued by every business. Businesses should review their Slovak domestic sales flows, customer master data, VAT numbers, and invoice types before go-live.
The e-invoice must be created, sent and received in a structured electronic format that allows automated processing. For businesses, the practical impact is that invoice compliance will move from document appearance to data quality. The XML data, tax codes, invoice references, VAT treatment, buyer and supplier identifiers and reporting fields will become central to compliance.
What is B2G e-Invoicing in Slovakia?
B2G e-invoicing in Slovakia should be considered in two layers. Slovakia already has public-sector e-invoicing obligations connected to public procurement and EU e-invoicing rules. However, the new eFaktura framework under the Slovak VAT Act is a separate and broader domestic VAT e-invoicing and reporting regime.
From 1 January 2027, domestic supplies in scope to public-sector bodies should be treated within the same structured eFaktura environment, where the supplier is required to issue an electronic invoice and the recipient must be able to receive it through the certified delivery service model. The Financial Administration has also published specific preparation guidance for public administration, including the need to check accounting software readiness, select a certified delivery service provider and test sending and receiving before full operation.
Companies supplying Slovak public-sector customers should therefore avoid relying only on older B2G rules and should prepare for the new Peppol-based domestic eFaktura process.
What is B2C e-Invoicing in Slovakia?
B2C e-invoicing is not currently part of the mandatory eFaktura scope for final consumers. The Slovak Financial Administration’s implementation communication expressly states that final consumers, meaning private individuals are not covered by the obligation.
Businesses may still issue electronic documents to consumers for commercial or customer-service reasons, but this is not the same as being subject to the mandatory Slovak eFaktura regime.
B2C-related documents may also fall under different Slovak rules, such as eKasa or simplified invoice treatment. The VAT e-invoicing guidance excludes certain simplified invoices, including low-value documents up to EUR 100 and eKasa documents, from the mandatory e-invoicing obligation.
E-Invoicing in Slovakia 2026 Last Updates
For Slovakia, 2026 is a preparation and voluntary implementation year. The Financial Administration states that voluntary eFaktura implementation is available from the second quarter of 2026.
A key operational update is the certified delivery service provider model. Businesses will send and receive e-invoices through a certified provider, also referred to as a digital postman. The provider will support secure invoice delivery, receipt and technical interoperability.
From a technical perspective, the Slovak architecture uses Peppol BIS Billing 3.0 for invoices and the national Slovak Tax Data Document, or SK TDD, for reporting. The model is described as a decentralised 5/6-corner architecture for secure exchange of structured invoice and tax data between economic operators, service providers and the Slovak tax authority.
For Peppol flows, the SK TDD is the reporting payload used to notify invoice data to the Financial Administration. In the standard supplier-issued flow, the supplier-side service provider (C2) sends the invoice to the buyer-side provider (C3) and transmits the SK TDD to the tax authority corner (C5) in parallel. The separate buyer-side C4 -> C3 -> C5 TDD flow should not be understood as a standard additional reporting flow for every received invoice; it is mainly relevant for self-billing scenarios, where the buyer issues the invoice in the name and on behalf of the supplier.
Another important transition rule is the non-Peppol B2B exception. If B2B parties mutually agree to exchange XML invoices in EN 16931 UBL outside Peppol, e-reporting is not expected for that flow until 2030, while the existing VAT Control Report remains mandatory.
E-Invoicing in Slovakia Deadlines and Compliance Roadmap
The compliance roadmap is now clear enough for businesses to plan their system, provider and reporting readiness. The 2026 period should be treated as a preparation and voluntary testing phase, while 2027 marks the beginning of the mandatory domestic phase.
| Timeline | Main scope |
| 1 January 2026 | Legal and operational preparation phase begins. The Financial Administration keeps provider records and publishes implementation materials. |
| Q2 2026 | Voluntary eFaktura implementation is available / launched for companies and entrepreneurs in 2026. |
| 1 January 2027 | Mandatory domestic e-invoicing and e-reporting for B2B and B2G transactions in scope. Peppol is the default accepted delivery route and XML Peppol BIS is the default accepted format. |
| 1 January 2027 – 30 June 2030 | Transitional domestic phase. Domestic e-invoicing and related reporting apply according to the amended VAT Act. |
| 1 July 2030 | Cross-border e-invoicing and digital reporting expansion. |
| From 1 July 2030 | VAT control statement and summary statement are expected to be replaced or removed as part of the digital reporting transition. |
| 2027-2030 non-Peppol B2B transition | Where B2B parties mutually agree to exchange XML invoices in EN 16931 UBL outside Peppol, e-reporting is not expected for that flow until 2030. |
The official legal guidance confirms that the domestic e-invoicing and reporting phase applies from 1 January 2027 to 30 June 2030, and that further changes take effect from 1 July 2030. The 2030 phase introduces cross-border reporting and is connected to the cancellation or replacement of certain existing VAT reporting mechanisms.
Is e-Invoice Mandatory In Slovakia?
Yes, but the obligation is phased. Slovakia does not currently have an economy-wide B2B, B2G and B2C e-invoicing mandate in force for all transactions. The current roadmap is more specific.
From 1 January 2027, mandatory e-invoicing applies to domestic transactions in scope. This covers domestic supplies of goods and services where the supplier is a Slovak VAT payer and the recipient is a domestic taxable person or domestic non-taxable legal person. The obligation includes the related electronic reporting of invoice data.
From 1 July 2030, Slovakia plans to extend the framework to cross-border transactions and digital reporting, in line with the ViDA-driven reform. This phase is expected to cover EU and third-country flows and to replace certain existing VAT reporting mechanisms.
Final consumers are not currently in scope of the mandatory eFaktura obligation. Therefore, the Slovak regime should be described as a phased domestic B2B/B2G e-invoicing and reporting mandate from 2027, followed by cross-border expansion from 2030.
Who is obliged to use e-Invoicing in Slovakia?
The main issuing obligation from 1 January 2027 applies to Slovak VAT payers carrying out domestic supplies of goods or services in scope. The customer must also be a domestic person: either a taxable person established or operating in Slovakia, or a non-taxable legal person with a domestic seat or sufficiently stable place in Slovakia.
Recipients in scope must also be able to receive e-invoices. The Slovak Financial Administration states that receiving electronic invoices will be mandatory for legal persons and entrepreneurs who are taxable persons. To receive e-invoices, businesses must arrange access through a certified delivery service provider.
In practical terms, the obligation will affect VAT-registered suppliers, domestic business customers, public-sector customers and non-taxable legal persons receiving domestic supplies in scope. Private individuals acting as final consumers are not currently covered by the mandatory eFaktura obligation.
How to Generate e-Invoices in Slovakia?
Generating e-invoices in Slovakia will require more than exporting a PDF from an ERP system. Businesses will need to create structured XML invoices compliant with the Slovak eFaktura model, transmit them through a certified delivery service provider and support the related tax data reporting process.
- The supplier creates the invoice in an ERP, billing or accounting system capable of producing structured Peppol BIS invoice data.
- The invoice is validated against the required business and technical rules.
- The invoice is sent through the selected certified delivery service provider.
- The buyer receives the invoice through its provider or connected solution.
- The relevant invoice data is reported to the Slovak Financial Directorate through the applicable SK TDD flow.
- The invoice, responses, logs and related evidence are archived according to Slovak tax and accounting rules.
For reporting, the SK TDD should be treated as the reporting payload. In the standard supplier-issued Peppol flow, the supplier-side service provider (C2) sends the invoice to the buyer-side provider (C3) and sends the SK TDD to the tax authority corner (C5) in parallel. Businesses should not interpret the model as requiring a separate buyer-side TDD/report for every received invoice. The separate buyer-side C4 -> C3 -> C5 TDD flow is mainly relevant for self-billing scenarios, where the buyer issues the invoice in the name and on behalf of the supplier. For non-Peppol mutually agreed B2B XML flows, current Slovak materials indicate that e-reporting is not expected until 2030 and that the existing VAT Control Report remains mandatory.
Slovakia e-Invoicing Requirements
Structured invoice format: The e-invoice must be a structured electronic document that enables automated electronic processing. A PDF, scan or image is not sufficient.
European standard alignment: The invoice data structure must align with the European e-invoicing standard EN 16931 and the applicable syntax rules. The Slovak model uses XML Peppol BIS as the default accepted invoice format; current Slovak programme materials indicate no local CIUS. The core format should therefore be treated as Peppol BIS / EN 16931 rather than a separate Slovak semantic customization.
Peppol-based delivery: Businesses are expected to send and receive invoices through certified delivery service providers connected to the Peppol-based Slovak model.
Non-Peppol B2B XML flows: During the 2027-2030 transition, current Slovak programme materials indicate that B2B parties may mutually agree to use XML e-invoicing in EN 16931 UBL outside Peppol, for example in sector-specific environments. For these non-Peppol agreed B2B flows, e-reporting is not expected until 2030 and the existing VAT Control Report remains mandatory.
Tax data reporting: The model includes electronic reporting of invoice data to the Financial Directorate through the Slovak Tax Data Document, or SK TDD. The SK TDD is the reporting payload, not a separate concept from reporting. In the standard supplier-issued Peppol flow, C2 sends the invoice to C3 and sends the SK TDD to C5 in parallel. The separate buyer-side C4 -> C3 -> C5 TDD flow should be described mainly in the context of self-billing, where the buyer issues the invoice in the name and on behalf of the supplier. The model should not be presented as requiring a separate buyer-side TDD for every standard supplier-issued invoice.
Correct invoice content: Supplier and buyer identifiers, invoice number, invoice date, supply date or payment date, quantity and description of goods or services, taxable base, VAT rate, VAT amount, exemption or reverse-charge indicators and correction invoice references must be accurately mapped where relevant.
Certified provider readiness: Businesses must work with a certified delivery service provider or a solution connected to one. Certified providers must satisfy Slovak and Peppol-related conditions, including OpenPeppol certification and EU establishment requirements.
e-Invoicing in Slovakia Deadlines
The current official roadmap is as follows:
- 1 January 2026: Legislation and provider framework begin to support implementation.
- Q2 2026: Voluntary implementation is available for businesses and entrepreneurs.
- 1 January 2027: Mandatory domestic e-invoicing and related reporting begin for domestic transactions in scope.
- 1 January 2027 to 30 June 2030: Transitional domestic e-invoicing and reporting period.
- 1 July 2030: Cross-border e-invoicing and digital reporting expansion, with further changes to VAT reporting obligations.
The official guidance also confirms that the standard invoice issuance deadline remains 15 days for the domestic transitional period. For domestic supplies in scope, the electronic invoice must generally be issued within 15 days from the supply of goods or services, or within 15 days from receiving an advance payment. Corrective e-invoices must generally be issued within 15 days after the end of the calendar month in which the event requiring correction occurred.
What are the benefits of e-Invoicing for businesses in Slovakia?
The Slovak eFaktura project is designed to support automated invoice processing, reduce manual data entry and improve the exchange of structured invoice information between businesses, software providers and the tax authority.
For businesses, the main benefits include faster invoice processing, fewer manual errors, stronger VAT data quality, improved audit readiness, more consistent invoice validation and better integration between ERP, accounting and tax reporting systems. Structured invoice data can also improve reconciliation, credit-note handling, procurement workflows and input VAT evidence.
The transition may also reduce long-term administrative work. However, the benefits will depend heavily on preparation. Businesses that clean master data, map VAT treatments correctly and test integrations early are more likely to experience a smoother implementation.
FAQs About e-Invoicing in Slovakia
Below are the most common practical questions businesses should consider when preparing for Slovakia e-invoicing.
What is the Standard Format for e-Invoices in Slovakia?
The standard format is a structured XML e-invoice aligned with the European e-invoicing standard EN 16931. The Slovak model uses XML Peppol BIS as the default accepted format, with no local CIUS indicated in the current Slovak programme materials. The technical architecture refers to Peppol BIS Billing 3.0 for invoices and credit notes, Peppol BIS Self-Billing 3.0 for self-billed documents and the Slovak Tax Data Document for tax reporting.
For non-Peppol B2B flows, parties may mutually agree on XML in EN 16931 UBL during the transition period. In that case, current programme materials indicate that e-reporting is not required for the non-Peppol flow until 2030 and that the existing VAT Control Report remains mandatory.
A PDF version may still be useful for human readability, internal approval or business communication, but it should not be treated as the legal structured e-invoice required under the new Slovak model.
Can Small Businesses Benefit from e-Invoicing in Slovakia?
Yes. Small businesses can benefit from e-invoicing through more automated invoicing, reduced manual entry, fewer invoice errors and faster customer processing. The Slovak Financial Administration has stated that 2026 will be a preparation year, including software changes, integration testing, training and the selection of a digital postman.
For smaller businesses and sole traders, the official communication indicates that simple web or mobile applications from certified digital postmen may be available as electronic mailboxes for received and issued invoices. This means smaller businesses may not need to build complex direct integrations if they can use a provider-supported application.
Are There Any Exemptions to the e-Invoicing Requirements in Slovakia?
Yes, but the exemptions should be described carefully. The domestic e-invoicing obligation does not apply to every document or transaction.
The official guidance excludes certain VAT-exempt supplies and simplified invoices. In particular, the obligation does not apply to supplies exempt under specified provisions of the Slovak VAT Act, or where the VAT payer issues a simplified invoice, such as a document for goods or services where the price including tax does not exceed EUR 100, or an eKasa cash register document.
Final consumers are also outside the mandatory eFaktura scope. Therefore, B2C consumer transactions should not be presented as part of a confirmed mandatory e-invoicing rollout.
Is There Penalties for Non-Compliance with e-Invoicing Regulations in Slovakia?
Yes. The previous penalty range of EUR 60 to EUR 3,000 should be updated. The latest official guidance states that failure to meet reporting obligations may result in a penalty of up to EUR 10,000, and repeated breaches may result in a penalty of up to EUR 100,000. The tax office will consider the seriousness and duration of the breach when determining the penalty amount.
The guidance also refers to situations where a penalty may not be imposed, for example where incorrect data is corrected and the error is evidently a clear mistake, or where reporting was delayed due to a proven technical failure on the side of the certified delivery service provider, provided the data is reported without delay after the failure is resolved.
What Software Solutions Are Available for e-Invoicing in Slovakia?
Businesses preparing for Slovakia e-invoicing should choose a solution that can support structured XML invoice creation, XML Peppol BIS without a local CIUS, Peppol BIS Billing 3.0, credit notes, self-billing scenarios, SK TDD generation, validation rules, certified delivery service provider connectivity and archiving controls.
The solution should also be able to integrate with ERP, accounting, billing and procurement systems. Important readiness areas include master data cleansing, VAT code mapping, invoice numbering, correction invoice references, buyer and supplier identifiers, delivery service provider onboarding, reporting status monitoring, exception handling and clear process separation between Peppol flows, self-billing flows and mutually agreed non-Peppol B2B XML flows.
For international businesses, Slovakia should be planned as part of a wider European e-invoicing and digital reporting strategy. The Slovak model is Peppol-based and ViDA-aligned, so businesses that already operate structured e-invoicing in other EU countries should assess how their existing Peppol, ERP and tax reporting capabilities can be adapted to Slovak requirements.