Serbia

This article was updated on 24 August 2026 to reflect Serbia's mandatory electronic invoicing framework following regulatory developments concerning System eFaktura (SEF) and the Central Invoice Register (CRF). It includes the implementation timeline for Serbia's B2G and B2B mandates, the introduction of mandatory CRF registration for public-sector e-invoices from July 2026, the country's fully centralised e-invoicing architecture, accepted UBL 2.1 SRPS EN 16931-1 technical formats, B2C e-Fiskalizacija rules, statutory penalties under Article 59, and developments supporting automated VAT reporting.

Introduction & digital tax strategy

Serbia has established one of Europe's most advanced government-led electronic invoicing frameworks through its System eFaktura (SEF), a fully centralised platform that supports the exchange of electronic invoices between businesses and public authorities. Since its introduction, the framework has progressively expanded from Business-to-Government (B2G) to Business-to-Business (B2B) transactions, while also supporting the country's broader strategy to digitalise VAT administration.

Unlike decentralised models adopted in some European countries, Serbia requires all in-scope electronic invoices to be exchanged through the government-operated System eFaktura (SEF). The platform acts as a single point of exchange and provides a single source of truth for invoice data, supporting real-time processing, greater transparency, and improved tax supervision.

The Serbian framework continues to evolve beyond electronic invoicing. Recent developments include the introduction of the Central Invoice Register (CRF) for public-sector invoices, mandatory input VAT recording inside SEF, ongoing enhancements to automated VAT reporting, and preparations for further integrations with national digital services and the Peppol network.

This guide explains Serbia's e-invoicing framework, including the legal basis for the mandate, the implementation timeline, the role of System eFaktura (SEF), the Central Invoice Register (CRF), technical standards, and practical steps businesses should take to remain compliant.

Understanding Serbia's e-invoicing reform

Serbia has developed one of Europe's most comprehensive government-operated electronic invoicing systems through System eFaktura (SEF). Introduced as part of the country's broader digital transformation strategy, SEF serves as a fully centralised platform for the exchange of electronic invoices between businesses and public authorities.

Unlike decentralised models, where invoices are exchanged directly between trading partners or through independent service providers, Serbia requires all in-scope electronic invoices to pass through a single government platform. This creates a single source of truth for invoice data and provides the government with greater visibility over commercial transactions, supporting more efficient tax administration and improved VAT compliance.

A phased implementation

Serbia introduced mandatory electronic invoicing gradually, allowing businesses and public authorities to adapt to the new framework over time.

The implementation began with B2G electronic invoicing in May 2022, before expanding to B2B transactions in January 2023. More recently, the framework has continued to evolve through the introduction of the Central Invoice Register (CRF) for public-sector invoices and additional digital services supporting VAT administration.

Objectives of the reform

The Serbian Government introduced System eFaktura to achieve several strategic objectives, including:

• Digitalising invoice exchange across both the public and private sectors.

• Improving transparency in commercial transactions.

• Automating VAT reporting processes.

• Reducing the VAT gap through improved supervision.

• Supporting more efficient public expenditure management.

• Creating a unified electronic invoicing ecosystem built around a central government platform.

As the platform continues to develop, it is expanding beyond electronic invoicing through new integrations with other government systems and the planned introduction of additional VAT reporting capabilities.

A continuously evolving platform

System eFaktura is no longer solely an electronic invoicing platform. It is evolving into a broader digital ecosystem that supports invoice exchange, VAT administration and integration with other public-sector digital services.

Recent developments include the mandatory use of the Central Invoice Register (CRF) for public-sector electronic invoices, new integrations with national digital systems and preparations for future connectivity with the Peppol network. These developments reflect Serbia's continued investment in expanding and modernising its digital tax infrastructure.

Serbia e-invoicing implementation timeline

Serbia introduced mandatory electronic invoicing through a phased implementation centred on the System eFaktura (SEF) platform. Since the project's inception, the framework has expanded from public procurement to private-sector transactions and continues to evolve through additional VAT reporting capabilities and new government integrations.

Key implementation dates

Legal framework

Serbia's mandatory electronic invoicing framework is established through a series of legal acts that govern the use of System eFaktura (SEF) and support the country's broader digital VAT strategy. Since the adoption of the legal framework in 2021, additional regulations have progressively expanded the scope of electronic invoicing and introduced new obligations relating to VAT reporting and public-sector invoice registration.

The principal legal instruments include:

Law on electronic invoicing (Закон о електронском фактурисању)

The Law on Electronic Invoicing (Zakon o elektronskom fakturisanju, Official Gazette of RS, Nos. 44/2021, 129/2021, 138/2022, and 92/2023) establishes the legal basis for mandatory electronic invoicing in Serbia. Adopted in May 2021, it introduced the framework for the implementation of System eFaktura (SEF) and enabled the phased rollout of mandatory electronic invoicing for both B2G and B2B transactions.

The law also establishes the legal conditions for issuing, receiving, processing and storing electronic invoices through the government-operated platform.

Official source: Ministry of Finance of the Republic of Serbia / Official Gazette of the Republic of Serbia.

Rulebooks implementing the law on electronic invoicing

The Law on Electronic Invoicing is supported by secondary regulations issued by the Ministry of Finance, primarily the Rulebook on Electronic Invoicing (Pravilnik o elektronskom fakturisanju, Official Gazette of RS, No. 47/2023 and amendments).

These rulebooks provide detailed technical and procedural requirements for using System eFaktura (SEF), including rules on electronic invoice formats, validation checks, status management, and the mandatory Individual (Pojedinačna) and Summary (Zbirna) VAT records.

Official source: Ministry of Finance of the Republic of Serbia.

Central Invoice Register (CRF) regulations

Serbia has also introduced regulations governing the Central Invoice Register (Централни регистар фактура - CRF).

From July 2026, registration of electronic invoices issued to public-sector recipients became mandatory, strengthening financial oversight and payment monitoring for public-sector transactions.

Official source: Ministry of Finance of the Republic of Serbia.

Authorities

Several public institutions are responsible for developing, operating and overseeing Serbia's electronic invoicing framework. Together, they establish the legal framework, manage the System eFaktura (SEF) platform and support the country's broader digital VAT strategy.

Ministry of finance

The Ministry of Finance of the Republic of Serbia (Министарство финансија) is responsible for the legislative framework governing electronic invoicing and VAT administration.

The Ministry led the introduction of the Law on Electronic Invoicing, oversees the continued development of Serbia's digital tax strategy and contracted the implementation of the System eFaktura (SEF) platform.

System eFaktura (SEF)

System eFaktura (SEF) is Serbia's official government-operated electronic invoicing platform.

It serves as the central exchange platform for mandatory electronic invoices, enabling businesses and public authorities to issue, receive and process invoices through a single government-managed system. SEF supports both a web user interface (UI) and API connectivity, allowing businesses to connect directly or through certified service providers.

Central Invoice Register (CRF)

The Central Invoice Register (Централни регистар фактура - CRF) records electronic invoices issued to public-sector recipients and monitors their payment status.

From July 2026, registration in the CRF became mandatory for electronic invoices addressed to public-sector entities, strengthening transparency and financial oversight within the public sector.

Office for Information Technologies and eGovernment

The Office for Information Technologies and eGovernment (Канцеларија за информационе технологије и електронску управу) has played an important role in Serbia's digital transformation and initially hosted the System eFaktura platform before its migration to Oracle Cloud Infrastructure (OCI) in January 2025.

Tax Administration

The Tax Administration of the Republic of Serbia (Пореска управа) is responsible for administering Serbia's tax system and supports the government's broader objective of improving VAT compliance through electronic invoicing and digital reporting.

As Serbia continues to expand the capabilities of System eFaktura, the Tax Administration plays an important role in the evolution of digital VAT reporting and the implementation of future compliance initiatives.

Scope of the mandate

Serbia's mandatory electronic invoicing framework applies to both Business-to-Government (B2G) and Business-to-Business (B2B) transactions covered by the Law on Electronic Invoicing. All in-scope electronic invoices must be exchanged through the government's System eFaktura (SEF), which acts as the country's central electronic invoicing platform.

Unlike decentralised e-invoicing models, Serbia requires participating entities to exchange invoices through a single government-managed system, creating one authoritative electronic invoice and a single source of truth for each transaction.

Who is affected?

The mandate applies to organisations that fall within the scope of Serbia's electronic invoicing legislation, including:

• Public-sector entities (javni sektor) issuing or receiving electronic invoices.

• Private-sector entities (privatni sektor) that are VAT-registered in Serbia.

• Corporate income tax entities that are not registered for VAT but choose or are mandated to interact with public-sector entities.

The law allows companies to use System eFaktura (SEF) directly through its web interface or API, or indirectly through certified electronic invoicing service providers (informacioni posrednici) that integrate with the government platform.

Which transactions are in scope?

The mandatory framework covers:

• Business-to-Government (B2G) transactions.

• Business-to-Business (B2B) transactions subject to the Law on Electronic Invoicing.

For these transactions, invoices are exchanged through System eFaktura (SEF), ensuring a single electronic invoice is shared between the supplier and the recipient while enabling government oversight and automated VAT processes.

Which transactions are currently outside the scope?

The source document focuses on the implementation of B2G and B2B electronic invoicing and does not specify the treatment of Business-to-Consumer (B2C) transactions or other potential exemptions. As such, these are not addressed in this guide.

Scope overview

Serbia’s e-invoicing requirements

Businesses within the scope of Serbia's mandatory electronic invoicing framework must issue, receive and process electronic invoices through System eFaktura (SEF) in accordance with the Law on Electronic Invoicing and its implementing regulations.

The framework replaces traditional invoice exchange for in-scope transactions with a government-operated digital platform, ensuring that electronic invoices are exchanged, validated and stored in a standardised and secure manner.

Electronic invoices must be exchanged through SEF

For transactions covered by the mandate, electronic invoices must be issued and received through System eFaktura (SEF).

Businesses may:

• Use the SEF web portal to create, send and receive electronic invoices.

• Connect directly to SEF through its API.

• Use an electronic invoicing solution or service provider that integrates with SEF.

Regardless of the connection method, the electronic invoice is exchanged through the central government platform.

Structured electronic invoices

Invoices exchanged through System eFaktura must be structured electronic documents rather than simple PDF files or scanned paper invoices.

Using structured invoice data enables:

• Automated invoice validation.

• Faster invoice processing.

• Improved data accuracy.

• Integration with ERP and accounting systems.

• Support for Serbia's digital VAT reporting framework.

Central validation and processing

Unlike decentralised e-invoicing models, Serbia validates electronic invoices through a single government platform.

When an invoice is submitted through SEF, the platform performs the necessary technical checks before making the invoice available to the recipient. This centralised approach creates a single authoritative version of the invoice while supporting transparency and efficient tax administration.

Integration with business systems

Businesses are not required to abandon their existing ERP or accounting software. Instead, many organisations integrate their internal systems directly with System eFaktura through available APIs or by using compatible software providers.

This allows organisations to automate invoice generation, submission, receipt and processing while maintaining compliance with Serbia's electronic invoicing requirements.

Supporting VAT digitalisation

System eFaktura is designed to support more than invoice exchange. As the platform continues to evolve, it also facilitates broader digital VAT processes, including electronic reporting capabilities and future automated VAT return preparation, reinforcing Serbia's wider strategy to modernise tax administration.

Technical architecture

Serbia's mandatory electronic invoicing framework is built around System eFaktura (SEF), a fully centralised government-operated platform that acts as the single point of exchange for electronic invoices within the scope of the mandate.

Rather than allowing invoices to be exchanged directly between suppliers and buyers, all in-scope electronic invoices are submitted to, validated by and exchanged through SEF. This centralised architecture creates a single source of truth for invoice data while enabling greater transparency, automated processing and improved VAT administration.

A centralised exchange model

Serbia has adopted a centralised exchange model, meaning that every electronic invoice passes through the government platform before reaching the recipient.

Businesses can connect to System eFaktura in several ways:

• Directly through the SEF web portal.

• Via the official SEF API.

• Through ERP, accounting or e-invoicing solutions that integrate with SEF.

Regardless of the connection method, the invoice is always processed through the central government platform.

Key components of Serbia's e-invoicing architecture

The framework consists of four principal components:

• Supplier - Creates the electronic invoice using an ERP, accounting or invoicing solution, or directly through the SEF web portal.

• System eFaktura (SEF) - Receives the invoice, performs the required technical validation and securely exchanges it with the recipient.

• Buyer - Receives the validated electronic invoice through SEF or via an integrated business system.

• Government digital services - Support additional functions such as VAT reporting, the Central Invoice Register (CRF) and other connected digital services as the platform continues to evolve.

Why a centralised model?

By routing all electronic invoices through System eFaktura, Serbia achieves several strategic objectives:

• Standardised electronic invoice exchange across the public and private sectors.

• Central validation of invoice data.

• Greater transparency over commercial transactions.

• Improved VAT monitoring and compliance.

• Integration with other government digital services.

• A scalable platform supporting future digital tax initiatives.

This architecture allows Serbia to progressively expand the capabilities of System eFaktura beyond electronic invoicing, supporting the country's broader digital transformation strategy and ongoing modernisation of VAT administration.

How Serbia's centralised e-invoicing model works

Serbia's mandatory electronic invoicing framework is based on a centralised exchange model, where all electronic invoices within the scope of the mandate pass through System eFaktura (SEF) before being delivered to the recipient.

Instead of exchanging invoices directly with one another, suppliers and buyers use the government-operated platform as the single point of exchange. This enables central validation, provides a single authoritative version of each invoice and supports Serbia's wider digital VAT strategy.

Insert Serbia SEF architecture diagram here.

Step 1 - The supplier creates the electronic invoice

The supplier creates the electronic invoice using:

• An ERP or accounting system integrated with SEF;

• An electronic invoicing solution connected to SEF via API; or

• The System eFaktura web portal.

The invoice is prepared in the structured electronic format required by the platform.

Step 2 - The invoice is submitted to System eFaktura

The supplier submits the invoice to System eFaktura (SEF).

The platform receives the invoice and performs the necessary technical validations before making it available to the recipient. Because every invoice passes through SEF, the platform acts as the central exchange point for all in-scope transactions.

Step 3 - The buyer receives the invoice

Once validated, the invoice becomes available to the buyer through System eFaktura.

Recipients may access invoices directly through the SEF portal or receive them automatically through an integrated ERP or accounting system connected via API.

Step 4 - Invoice processing and integration

After receipt, the buyer processes the invoice using its internal financial systems.

The structured nature of the invoice enables automated processing, reduces manual intervention and supports efficient accounting and VAT administration.

Benefits of the centralised model

By requiring all electronic invoices to pass through System eFaktura, Serbia has established a standardised and transparent framework for electronic invoice exchange.

Key benefits include:

• A single government-operated platform for invoice exchange.

• Central validation of electronic invoices.

• Improved transparency across commercial transactions.

• Reduced manual processing and fewer invoicing errors.

• Better support for VAT administration and digital tax reporting.

• Integration with other government digital services, including the Central Invoice Register (CRF).

The centralised architecture also provides a strong foundation for future enhancements, including expanded digital reporting capabilities and further automation of Serbia's tax administration processes.

What a Serbian e-invoice looks like

Under Serbia's mandatory electronic invoicing framework, an electronic invoice is a structured electronic document that is created, exchanged and processed through System eFaktura (SEF). Unlike a traditional paper invoice or PDF document, a structured electronic invoice contains machine-readable data that enables automatic validation, processing and integration with business systems.

Electronic invoices exchanged through SEF support automated workflows, improve data quality and facilitate Serbia's broader digital VAT strategy.

Mandatory invoice information

Electronic invoices must include the information required under the Law on Electronic Invoicing and the applicable VAT legislation.

Depending on the transaction, this generally includes:

• Supplier identification details.

• Customer identification details.

• Invoice number.

• Invoice issue date.

• Description of the goods or services supplied.

• Quantity and unit price.

• Applicable VAT rate(s).

• VAT amount.

• Total invoice amount.

• Payment terms, where applicable.

Additional information may be required depending on the nature of the transaction and the applicable legal requirements.

Validation through System eFaktura

Before an electronic invoice is exchanged with the recipient, it is submitted to System eFaktura, where it undergoes the platform's validation process.

This central validation helps ensure that invoices comply with the required technical and legal requirements before they are made available to the recipient, supporting consistent invoice quality and reliable electronic processing.

Accepted invoice formats 

Serbia's mandatory electronic invoicing framework requires invoices to be submitted and exchanged in a structured XML format through System eFaktura (SEF).

Structured XML specification (SRPS EN 16931-1)

Invoices submitted to SEF must conform to the UBL 2.1 XML syntax, specifically structured according to the Serbian national extension standard: SRPS EN 16931-1.

This technical standard was developed by the Institute for Standardization of Serbia (Institut za standardizaciju Srbije) based on the European EN 16931-1 standard, adapted to incorporate specific Omani/Serbian tax legislation requirements (such as JBKJS public budget numbers and custom tax category codes).

PDF visual rendering

While the legally binding e-invoice payload processed and stored by SEF is strictly the UBL 2.1 XML file, SEF automatically generates a visual PDF rendering of the XML document. Businesses may download or view this human-readable PDF via the portal, but it serves purely as a visual representation of the underlying structured XML data.

System interoperability

The structured format used by System eFaktura enables:

• Automated invoice validation.

• Electronic processing by ERP and accounting systems.

• Secure exchange of invoice data.

• Integration with Serbia's evolving digital VAT reporting framework.

• Improved interoperability between businesses and public authorities.

As Serbia continues to enhance System eFaktura, the platform is also evolving to support additional integrations, including future connectivity with the Peppol network, further strengthening interoperability within the broader European digital invoicing ecosystem.

VAT reporting and future developments

Serbia's electronic invoicing framework has evolved beyond the exchange of electronic invoices. Through the continued development of System eFaktura (SEF), the country is progressively digitalising VAT reporting and integrating additional government services into a single digital ecosystem.

The long-term objective is to improve tax administration, increase transparency and reduce the administrative burden on businesses by automating key VAT processes.

Mandatory deductible VAT reporting

A significant milestone was reached in November 2024, when Serbia introduced mandatory reporting of deductible (input) VAT through System eFaktura.

This enhancement expanded the platform's role beyond invoice exchange, enabling VAT-related information to be submitted electronically and supporting more efficient tax administration.

Central Invoice Register (CRF)

Another important development is the introduction of the Central Invoice Register (CRF).

From July 2026, electronic invoices issued to public-sector recipients must also be registered in the CRF, strengthening transparency and improving the monitoring of public-sector financial obligations. The register complements System eFaktura by supporting invoice oversight and payment tracking for public-sector transactions.

Planned preliminary VAT return

Serbia's digital VAT framework is expected to expand further with the planned introduction of an automated preliminary VAT return form in January 2027.

This initiative is intended to simplify VAT compliance by using information already available within System eFaktura, reducing manual reporting requirements and supporting greater automation of tax administration.

Continuing digital transformation

The Serbian Government continues to enhance System eFaktura through additional technical improvements and integrations.

Recent developments include:

• Migration of SEF to Oracle Cloud Infrastructure (OCI).

• Integration of the electronic dispatch note (e-Dispatch Notes) system.

• Preparations for future Peppol interoperability.

• Continued expansion of digital VAT reporting capabilities.

These developments demonstrate that System eFaktura is evolving beyond a traditional electronic invoicing platform into a broader digital tax infrastructure supporting invoice exchange, VAT administration and connected government services.

Penalties for non-compliance

Businesses subject to Serbia's mandatory electronic invoicing framework must strictly comply with the obligations established under the Law on Electronic Invoicing (Zakon o elektronskom fakturisanju).

Failure to issue, receive, store, or process electronic invoices through System eFaktura (SEF) in accordance with statutory rules exposes businesses to administrative sanctions and financial fines under Article 59 of the Law.

Statutory penalty regime (Article 59)

Additional operational and fiscal consequences

Beyond statutory fines, non-compliance leads to severe operational and administrative risks:

• Disallowance of input VAT deductions: The Tax Administration will disallow input VAT claims on purchases that were not processed as valid electronic invoices through SEF.

• Payment delays in public procurement: Invoices issued to public sector entities outside SEF and CRF are legally invalid and cannot be processed for payment by the State Treasury.

• Transaction rejection: Buyers are legally obligated to reject non-compliant or incorrectly issued invoices within SEF.

How businesses can prepare

Although Serbia's mandatory electronic invoicing framework is already in operation, the continued expansion of System eFaktura (SEF) means businesses should regularly review their systems and processes to ensure they remain compliant with new legal and technical requirements.
As the platform evolves to support additional VAT reporting obligations, the Central Invoice Register (CRF) and further digital services, organisations should take a proactive approach to compliance.

Review your invoicing processes

Businesses should assess how invoices are currently created, exchanged and processed to ensure they comply with the requirements of System eFaktura (SEF).
This includes reviewing internal workflows, identifying manual processes and ensuring that invoices can be exchanged electronically through the government platform.

Ensure your software integrates with SEF

Organisations should confirm that their ERP, accounting or invoicing software can connect to System eFaktura.

Depending on the business, this may involve:

• Using the SEF web portal.

• Integrating directly through the SEF API.

• Working with a software provider that supports SEF integration.

Prepare for evolving VAT requirements

As Serbia continues to expand its digital VAT framework, businesses should ensure that their internal processes can support:

• Electronic invoice exchange.

• VAT reporting requirements.

• Any obligations relating to the Central Invoice Register (CRF).

• Future enhancements introduced through System eFaktura.

Train internal teams

Successful implementation depends not only on technology but also on people.

Finance, accounting, tax and IT teams should understand:

• How System eFaktura operates.

• Changes to invoice processing workflows.

• New VAT reporting obligations.

• Internal procedures for handling electronic invoices and maintaining compliance.

Providing training before new functionality or regulatory changes are introduced will help reduce operational disruption.

Monitor future developments

Serbia's electronic invoicing framework continues to evolve through legislative updates and enhancements to System eFaktura.

Businesses should monitor official announcements from the Ministry of Finance and other competent authorities for:

• Updates to the legal framework.

• New technical specifications.

• Additional VAT reporting functionality.

• Future integrations and platform enhancements.

Remaining informed will help organisations adapt efficiently as Serbia continues to modernise its digital tax infrastructure.

Consider working with an experienced e-invoicing provider

Businesses that use an e-invoicing solution integrated with System eFaktura can simplify compliance, automate invoice exchange and reduce manual processing.

An experienced provider can also help organisations adapt to future changes as Serbia continues expanding its digital invoicing and VAT reporting framework.

Conclusion 

Serbia has established one of Europe's most advanced government-led electronic invoicing frameworks through System eFaktura (SEF). By introducing a fully centralised platform for the exchange of electronic invoices, the country has transformed both public- and private-sector invoicing while laying the foundation for broader digital tax administration.

Since the adoption of the Law on Electronic Invoicing in 2021, Serbia has progressively expanded its framework from Business-to-Government (B2G) to Business-to-Business (B2B) transactions. More recent developments, including the Central Invoice Register (CRF), mandatory deductible VAT reporting and the planned introduction of an automated preliminary VAT return, demonstrate that System eFaktura is evolving beyond an invoicing platform into a comprehensive digital ecosystem supporting VAT compliance and government services.

For businesses, compliance involves more than simply issuing electronic invoices. Organisations should ensure their invoicing systems integrate with System eFaktura, review internal processes, monitor ongoing regulatory developments and prepare for future enhancements to Serbia's digital tax framework.

As the platform continues to evolve through new technical capabilities and expanded digital services, businesses that invest in compliant systems and proactive preparation will be best positioned to meet Serbia's regulatory requirements while benefiting from greater automation, improved efficiency and streamlined VAT compliance.