Slovakia: Financial Administration to Assign Tax Identification Numbers to Some 58,000 Legal Entities by End-October 2026 So They Can Operate in the 2027 E-Invoicing System

Country Update — Slovakia  |  11 August 2026  |  Topic: E-Invoicing / Tax Registration

On August 7, 2026 the Slovak Financial Administration announced that it is continuing ex officio registration of legal entities for income tax using data taken from the Register of Legal Persons, Entrepreneurs and Public Authorities, and that it intends to register approximately 58,000 legal entities that appear in that register without a tax identification number by the end of October 2026.

The stated purpose is to enable those entities to operate in the mandatory electronic invoicing system from January 1, 2027. In the same period, the Financial Administration refreshed its list of certified delivery service providers on July 22 and again on August 10, 2026; published for the first time a list of providers in the accreditation process on August 10, and issued dedicated guidance for municipalities and towns on July 16, 2026.

Background

Slovakia will require value added tax payers to issue and receive domestic invoices as structured electronic invoices conforming to EN 16931, in either UBL or CII syntax, from January 1, 2027. The mandate covers business-to-business and business-to-government transactions.

The legal basis is Act No. 385/2025 Coll., amending Act No. 222/2004 Coll. on value added tax, which was valid from January 1, 2026 and takes effect from January 1, 2027. Section 76a of the amended VAT Act requires readability in XML conforming to the applicable business interoperability specification, and the European delivery standard adopted is that of OpenPeppol.

The Slovak model is a delivery-network model rather than a central clearance model. Invoices travel through certified delivery service providers — colloquially “digital postmen” — which must retain delivery and receipt logs for at least six months. Every taxable person must select a provider, and that selection is made through the Financial Administration’s electronic services.

The methodical guidance that frames the regime remains Methodical Guideline 7/DPH/2025/I of December 29, 2025, covering provisions effective from January 1, 2026, and Methodical Guideline 1/DPH/2026/I of January 14, 2026, covering provisions effective from January 1, 2027 and July 1, 2030.

The official frequently asked questions document on eFaktúra, reference 9/DPH/2025/IM, is reissued approximately monthly; the current version as at the date of this update is dated July 7, 2026 and runs to 47 pages, having grown from 22 pages in its March 3, 2026, edition.

What has not previously been discussed publicly is a precondition that sits underneath all of this. A delivery-network model identifies participants by tax identification number. An entity without one cannot be addressed on the network, cannot select a delivery service provider, and therefore cannot receive an electronic invoice.

Slovakia has a substantial population of legal entities that exist in the public registers but have never been assigned a tax identification number, typically because they have no taxable income and have never had a filing obligation.

The Legislative Change

This is not a legislative change. It is an administrative program operating within the existing legal framework, and the Financial Administration is explicit that it creates no new tax liability.

It is nonetheless binding in practice on the entities concerned, and it is materially relevant to any business that invoices them, because it is the step that makes those entities addressable in the electronic invoicing system from January 1, 2027.

The Financial Administration announced on August 7, 2026 that it is continuing ex officio registration for income tax of legal entities, using data taken over from the Register of Legal Persons, Entrepreneurs and Public Authorities.

It plans to register approximately 58,000 legal entities that appear in that register but hold no tax identification number, with the program targeted for completion by the end of October 2026. Both the figure and the target date are stated officially.

Registration decisions and the assignment of tax identification numbers are delivered electronically through the Central Public Administration Portal and are electronically authorized rather than physically signed.

The Financial Administration states expressly that the assignment of a tax identification number creates no new tax liability and no obligation to file a return, and that entities with only non-taxable income are unaffected in their tax regime.

The link to the mandate is stated in terms. The purpose is to allow legal entities to operate in the mandatory electronic invoicing system from January 1, 2027, and the registration decisions carry an obligation to use the assigned number when meeting duties under the VAT Act effective from that date, for identification in the system that sends and receives electronic invoices.

The program is not new in principle. Ex officio registration has run since 2023 for the trade and commercial registers, and was later extended to housing owners’ associations, land associations, hunting organizations, taxi services, financial advisers, athletes, experts, interpreters and translators.

In 2026 it was extended to civic associations, associations of municipalities, advocates, tax advisers, authorized architects and construction engineers. By October 2026 further registers are to be added: foundations, non-profit organizations, political parties, churches and religious societies, universities, public research institutions and tourism organizations.

Three further official artifacts belong to the same readiness theme. On July 16, 2026 the Financial Administration published information for municipalities and towns, addressing the public-sector side of the mandate.

On July 22, 2026 it published a refreshed list of certified delivery service providers, and on August 10, 2026 it published both an updated certified-provider list and, for the first time, a list of providers in the accreditation process. That second list is new information for procurement: it distinguishes providers a taxable person may rely on today from providers that are not yet certified.

Scope

The registration program covers legal entities recorded in the Register of Legal Persons, Entrepreneurs and Public Authorities that hold no tax identification number. On the Financial Administration’s own figure that is approximately 58,000 entities.

By category, the 2026 extension reaches civic associations, associations of municipalities, advocates, tax advisers, authorized architects and construction engineers, with foundations, non-profit organizations, political parties, churches and religious societies, universities, public research institutions and tourism organizations to be added by October 2026.

The electronic invoicing mandate itself applies from January 1, 2027 to business-to-business and business-to-government transactions, and imposes a universal reception obligation extending to sole traders. It does not extend to business-to-consumer transactions.

The obligation to select a delivery service provider through the Financial Administration’s electronic services applies to every taxable person in scope.

This has a practical consequence that follows from the registration program: an entity newly assigned a tax identification number must also ensure that its statutory body or an authorized person has access to the Financial Administration’s electronic services, since without that access it cannot make the selection.

The guidance for municipalities and towns of July 16, 2026 is addressed to the public-sector population specifically, which in Slovakia includes a large number of small municipalities with limited administrative capacity.

Timeline

• December 29, 2025 — Methodical Guideline 7/DPH/2025/I issued, covering provisions effective from January 1, 2026.
• January 1, 2026 — Act No. 385/2025 Coll. becomes valid.
• January 14, 2026 — Methodical Guideline 1/DPH/2026/I issued, covering provisions effective from January 1, 2027 and July 1, 2030.
• June 1, 2026 — version 02 of the user guide for selecting a delivery service provider published.
• June 25, 2026 — version 1.10 of the transposition of the Peppol business interoperability specification into Slovak legislative conditions published.
• July 7, 2026 — current version of the official eFaktúra frequently asked questions, reference 9/DPH/2025/IM, issued at 47 pages.
• July 16, 2026 — Financial Administration publishes information for municipalities and towns.
• July 22, 2026 — refreshed list of certified delivery service providers published.
• August 7, 2026 — Financial Administration announces ex officio registration of approximately 58,000 legal entities, targeted for completion by the end of October 2026.
• August 10, 2026 — updated list of certified delivery service providers published, together with the first list of providers in the accreditation process.
• End of October 2026 — target completion of the registration program; further registers added.
• January 1, 2027 — mandatory structured electronic invoicing for business-to-business and business-to-government transactions takes effect.
• July 1, 2030 — further provisions covered by Methodical Guideline 1/DPH/2026/I take effect.

Businesses Affected

The most directly affected population is the approximately 58,000 legal entities receiving a tax identification number ex officio. For most of them the assignment is administratively neutral — no new liability, no return to file — but it is not operationally neutral, because it brings with it the need to arrange access to the Financial Administration’s electronic services and to select a delivery service provider before January 1, 2027.

The population that should read this most carefully, however, is businesses that invoice such entities. Civic associations, foundations, churches, political parties, universities, public research institutions and tourism organizations are customers of ordinary commercial suppliers.

From January 1, 2027 an invoice to such a customer must be delivered as a structured electronic invoice over the network, which requires the customer to be addressable. Suppliers with large or long-tail customer masters in Slovakia should expect a wave of new tax identification numbers to appear between now and end-October 2026, and should plan a customer master data refresh accordingly.

Municipalities and towns are affected both as recipients and, where they invoice, as issuers, and are the specific audience of the July 16, 2026 guidance.

Businesses selecting a delivery service provider are affected by the August 10, 2026 publication of the two separate lists. A provider on the accreditation list is not a provider a taxable person can currently rely on for compliance, and procurement decisions taken from a single undifferentiated list carry avoidable risk.

Required Actions

• Plan a Slovak customer master data refresh for the fourth quarter of 2026. Tax identification numbers will be assigned to a large population of legal entities through to end-October, and a customer record without a number cannot be addressed on the delivery network from January 1, 2027.
• Identify Slovak customers that are civic associations, foundations, non-profit organizations, churches or religious societies, political parties, universities, public research institutions, tourism organizations or associations of municipalities, and flag them for verification. These are precisely the categories being brought into the register.
• Where your organization is itself one of the entities being registered, confirm receipt of the registration decision through the Central Public Administration Portal, and ensure that the statutory body or an authorized person has access to the Financial Administration’s electronic services. Without that access the entity cannot select a delivery service provider.
• Select a delivery service provider from the certified list published on August 10, 2026, and confirm explicitly that the provider is on the certified list rather than the accreditation list.
• Obtain and review the current version of the official eFaktúra frequently asked questions, reference 9/DPH/2025/IM, dated July 7, 2026, and re-check it periodically; it has been reissued roughly monthly and has more than doubled in length since March 2026.
• Where the organization is a municipality or town, or supplies them, review the information for municipalities and towns published on July 16, 2026.
• Confirm that your invoicing solution produces EN 16931-conformant output in UBL or CII, and validate against version 1.10 of the Slovak Peppol transposition document of June 25, 2026 rather than against the generic European specification alone.
• Build the six-month delivery and receipt log retention requirement into your provider contract and your own archiving arrangements, and confirm who holds evidence of delivery in a dispute.

Practical Implications

This development is easy to overlook because it looks like a domestic registration housekeeping exercise, and it is reported as one. Read against the January 1, 2027 mandate it is something more specific: it is the Slovak administration solving an addressability problem that would otherwise have surfaced as mass invoice delivery failure in the first weeks of 2027.

That framing is worth carrying into supplier-side planning, because the risk it mitigates for the administration is a risk that would have landed on suppliers.

The consequence for suppliers is a data quality exercise with a hard deadline and a moving input. Between now and end-October 2026 the Slovak register population with tax identification numbers grows by roughly 58,000.

A supplier that refreshes its customer master in September will refresh it against an incomplete picture. The sensible cadence is a refresh in early November, after the program completes, with a further check before go-live.

The publication of a separate accreditation list is a smaller point with immediate commercial consequence. Providers in accreditation may market themselves as Slovak-compliant. Until certification, they are not. Any provider selection made in the last few months should be re-checked against the August 10, 2026 certified list.

More broadly, the pace of official publication — guidance for municipalities in mid-July, provider lists refreshed twice in three weeks, a frequently asked questions document reissued roughly monthly and growing steadily — indicates a regime whose operational detail is still being written five months before go-live.

Organizations should not treat any Slovak readiness assessment as final, and should build a recurring monitoring step rather than a one-off review.

Finally, the registration program is a reminder that structured invoicing mandates fail at the edges rather than in the centre. Large taxable persons with capable finance functions will comply.

The compliance risk concentrates in small counterparties, unusual legal forms and public bodies, and it manifests as an invoice that cannot be delivered rather than as a wrong invoice.

Expected Next Steps

The registration program should be expected to complete, or substantially complete, by the end of October 2026, with the additional registers — foundations, non-profit organizations, political parties, churches and religious societies, universities, public research institutions and tourism organizations — added in that period.

Further reissues of the official eFaktúra frequently asked questions should be expected at roughly monthly intervals, and further refreshes of both provider lists should be expected as accreditations complete. Organizations should monitor the eFaktúra page directly rather than waiting for secondary reporting.

Further methodical guidance from the Financial Administration should be expected in the second half of 2026 as the January 1, 2027, date approaches, particularly on error handling, on the treatment of counterparties who are not addressable, and on the interaction between the reception obligation and sole traders.

Updated versions of the Slovak Peppol transposition document and of the solution architecture should be expected as the technical baseline settles.

KGT will report separately on the completion of the registration program, on further versions of the frequently asked questions and Peppol transposition documents, and on any legislative refinement of the January 1, 2027 mandate.

How Can KGT Support You?

KGT is a specialist indirect tax technology firm. Our SAP-integrated e-invoicing and e-reporting add-ons generate, validate and transmit country-compliant structured documents directly from SAP ECC and SAP S/4HANA, keeping tax determination, document mapping, status handling and the audit trail inside the system of record rather than in a downstream converter. Because the add-ons validate against the current national schemas, schematrons and code lists before transmission, a change of specification version becomes a configuration and regression-test exercise rather than a redesign.

We also deliver SAP Document and Reporting Compliance (DRC) services end to end: fit-gap assessment against the national mandate, activation and configuration of the relevant country versions, eDocument and eStatement setup, interface and connectivity design, master and transactional data remediation, test strategy including negative testing against the authority’s own validation artifacts, and post-go-live monitoring of rejections and status reconciliation. If you would like a readiness review against the developments described above, or an impact assessment for your SAP landscape, we would be glad to help.

Official sources

• Financial Administration of the Slovak Republic, press release on ex officio registration and the assignment of tax identification numbers, August 7, 2026: View source
• Financial Administration of the Slovak Republic, press release document, August 7, 2026: View source
• Financial Administration of the Slovak Republic, eFaktúra page (certified provider lists, accreditation list, guidance for municipalities): View source
• Financial Administration of the Slovak Republic, official eFaktúra frequently asked questions, reference 9/DPH/2025/IM, version of July 7, 2026: View source
• Financial Administration of the Slovak Republic, information for municipalities and towns, July 16, 2026: View source
• Financial Administration of the Slovak Republic, list of certified delivery service providers, August 10, 2026: View source
• Financial Administration of the Slovak Republic, list of delivery service providers in the accreditation process, August 10, 2026: View source
• Slov-Lex legal and information portal, Act No. 222/2004 Coll. on value added tax as amended: View source
• OpenPeppol, Peppol specifications: View source

This publication is provided for general informational purposes only and does not constitute tax, legal, or professional advice. Please consult your advisor before acting on any information contained in this update.