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eInvoice for Microsoft Dynamics 365 Business Central in Slovakia

Sat, 15 Aug 2026 11:00:00 +0000

From 1 January 2027, Slovak companies will face a major change in invoicing. An electronic invoice will no longer be just a PDF document sent by email. Invoices will be issued, sent and received in a structured electronic format that information systems can process automatically.

For companies using Microsoft Dynamics 365 Business Central, this means preparing the ERP system for a new way of exchanging invoices electronically.

The good news is that Business Central already includes technologies for working with electronic documents. However, the Slovak eInvoice is not just about creating an XML file. The entire process needs to be addressed – from data in Business Central, through invoice validation and sending, to receiving, checking, approving and posting incoming invoices.

What will change for Business Central from 2027?

Today, many companies follow a standard process: create an invoice in Business Central, generate a PDF document and send it to the customer by email.

With the Slovak eInvoice, the process will be different.

The invoice will contain structured data that the system must generate correctly and then send electronically through the relevant infrastructure.

In simplified form, the process may look like this:

Microsoft Dynamics 365 Business Central → eInvoice → Peppol / Digital Postman → business partner

The same principle works in the opposite direction:

supplier → Peppol / Digital Postman → eInvoice → Business Central

The goal is to avoid users having to manually export, re-enter or upload invoices into other systems.

Microsoft Dynamics 365 Business Central already supports electronic documents

Microsoft Dynamics 365 Business Central includes functionality for working with electronic documents.

In current versions of Business Central, Microsoft uses the E-Documents functionality, which enables companies to work with electronic sales and purchase documents and integrate them with external services.

Business Central also supports electronic invoices in the Peppol format.

This provides a good technical foundation.

However, for Slovak legislation, it will still be necessary to ensure correct data mapping, validation, communication with the electronic delivery service provider, and the entire process of sending and receiving invoices.

How can eInvoice sending from Business Central work?

Users can continue creating sales invoices directly in Business Central in a similar way to today.

After the invoice is posted, an integration solution can automatically handle the next steps.

1. Loading data from Business Central

The required data is retrieved from the invoice, for example:

supplier,
customer,
VAT ID,
invoice number,
issue date,
supply date,
invoice lines,
quantities,
prices,
VAT rates,
VAT amounts,
total amount,
payment details.

The accuracy of this data will be particularly important for electronic invoicing.

2. Creating the electronic invoice

The data from Business Central is transformed into the required structured electronic format.

The user therefore does not need to manually export the invoice or recreate it in another system.

3. eInvoice validation

Before the invoice is sent, it is advisable to validate it automatically.

Validation can identify issues such as:

missing mandatory data,
incorrect business partner identification,
incorrect tax data,
missing codes,
errors in the electronic document structure.

It is better to identify such an error before the document is sent.

4. Sending via a Digital Postman

A validated eInvoice can then be sent automatically through a selected electronic delivery service provider.

The Business Central user therefore does not need to work in another portal or manually upload invoices.

5. Information about the result

Business Central or the integration solution can keep track of the document processing status.

The user can therefore see statuses such as:

Prepared → Validated → Sent → Delivered

If a problem occurs, the system can notify the responsible user.

How will receiving eInvoices into Business Central work?

Receiving invoices can be even more interesting for companies than sending them.

In a traditional process, a PDF invoice often arrives by email. Someone then has to open it, check it and manually enter or import the data into the ERP system.

With a structured eInvoice, the data is already available electronically.

The process can therefore look like this:

Received eInvoice → validation → approval → Business Central → posting → archiving

Automatic creation of a purchase invoice

Data from a received electronic invoice can be used to create the relevant purchase document in Business Central.

The system can work with data such as:

supplier identification,
supplier invoice number,
dates,
items,
G/L accounts,
dimensions,
amounts,
VAT,
purchase order or other references.

The result can be a significant reduction in manual data entry.

Matching the eInvoice with a purchase order

If the company uses purchase orders, a received eInvoice can be automatically compared with an existing order.

The system can check, for example:

purchase order → goods/service receipt → invoice

This process makes it possible to identify discrepancies before the invoice is posted.

These can include differences in:

quantity,
price,
ordered item,
total invoice value.

Approval of received eInvoices

Receiving an electronic invoice is usually not the end of the process.

The invoice often needs to be approved by a department manager, cost centre owner, project manager or other responsible users.

4B Software can connect electronic invoicing with the Request Management Portal (RMP).

A received invoice can automatically continue into a defined workflow.

For example:

eInvoice

↓

data validation

↓

purchase order matching

↓

approval workflow

↓

approval

↓

Business Central

↓

posting and archiving

The approval process can be configured according to the company’s internal rules – for example based on invoice value, department, cost centre, project or a specific supplier.

eInvoice and master data in Business Central

One of the areas companies should review before 2027 is master data.

With electronic invoicing, companies will no longer be able to rely on someone manually correcting incomplete information while processing a PDF document.

Important data will include:

company names,
addresses,
company registration numbers,
VAT IDs,
bank details,
payment terms,
units of measure,
tax setup,
business partner identifiers.

The better the quality of the data in Business Central, the easier it will be to automate eInvoice processing.

Do we need to replace Business Central because of eInvoice?

No.

If you are already using Microsoft Dynamics 365 Business Central, the goal is not to replace your ERP system.

Quite the opposite.

The role of the integration solution is to allow users to continue working in Business Central while communication with the electronic invoicing infrastructure runs as automatically as possible in the background.

Users should not have to work in several different applications just to send or receive an invoice.

What if we use an older version of Microsoft Dynamics NAV?

Electronic invoicing will not only affect companies using the latest version of Business Central.

Many Slovak companies still use Microsoft Dynamics NAV.

Even in this case, an integration solution can be prepared between the existing ERP system and the Slovak eInvoice.

The available options depend on the specific Dynamics NAV version, existing customizations and the way the company currently processes invoices.

If you use an older version of NAV, we therefore recommend starting preparation early.

When should you start preparing Business Central for eInvoice?

Ideally during 2026.

The technical integration itself is only one part of the project.

Before going live, it is advisable to review:

the Microsoft Dynamics 365 Business Central version,
the way sales invoices are issued,
the way purchase invoices are received,
the quality of master data,
existing approval processes,
the use of purchase orders,
integrations with other systems,
invoice archiving,
error handling,
communication with the Digital Postman.

The entire process can then be tested before mandatory operation begins.

eInvoice can be an opportunity for automation

Mandatory electronic invoicing does not have to be just another legislative obligation.

For companies using Business Central, it can also be an opportunity to remove a significant amount of manual work from invoice processing.

Instead of:

PDF → email → open document → re-enter data → validation → approval → ERP

the process can become:

eInvoice → automatic import → validation → workflow → Business Central

The more invoices a company processes, the greater the benefit of automating the entire process can be.

How can 4B Software help?

4B Software specializes in Microsoft Dynamics 365 Business Central, Dynamics NAV, integrations and business process automation.

For the Slovak eInvoice, we can design a solution based on your company’s existing environment.

It can include:

integration of Business Central with the Slovak eInvoice,
generation of electronic invoices,
data validation,
sending eInvoices,
receiving eInvoices,
communication with the Digital Postman,
processing error states,
automatic import of received invoices,
purchase order matching,
invoice approval,
integration with the Request Management Portal,
document archiving.

The goal is to make electronic invoicing fit naturally into your existing processes without adding unnecessary manual work for users.

Slovakia eInvoice for Business Central

If you use Microsoft Dynamics 365 Business Central or Microsoft Dynamics NAV, we recommend starting preparations for the Slovak eInvoice well in advance.

See our solution Slovakia eInvoice – integration with Business Central and ERP systems.

We can review your existing environment, the way you issue and receive invoices, and propose a suitable integration approach.

SAPI-SK: One Standard API for All Digital Access Points

Sat, 01 Aug 2026 11:00:00 +0000

Starting on 1 January 2027, electronic invoicing (eInvoice) will become mandatory for selected business transactions in Slovakia. Companies and ERP vendors will need to exchange electronic invoices through the Peppol network.

For software vendors, this raises an important question:

Should an ERP system integrate separately with every Peppol Access Point, or is there a common interface?

The answer is SAPI-SK (Standardised Access Point Interface – Slovakia), a standardized communication interface designed to simplify integration between ERP systems and certified Peppol Access Points.

What is SAPI-SK?

SAPI-SK is a standardized API specification that enables ERP systems to communicate with certified digital access point providers through a single interface.

Without such a standard, every provider could expose its own proprietary API, forcing ERP vendors to develop and maintain multiple integrations.

By implementing SAPI-SK once, an ERP system can communicate with different certified providers without changing its business logic.

How Does It Work?

ERP System
      │
      │  SAPI-SK
      ▼
Digital Access Point
      │
      ▼
 Peppol Network
      │
      ▼
Business Partner

The ERP system communicates only through the SAPI-SK interface.

The certified Access Point is responsible for:

validating electronic invoices,
communicating with the Peppol network,
delivering invoices to recipients,
complying with Slovak and European eInvoicing regulations.

Why Is a Standard Important?

Implementing a common interface provides significant advantages for ERP vendors and their customers:

one integration instead of many,
easier replacement of Access Point providers,
lower development and maintenance costs,
simplified compliance with future legislative changes,
long-term interoperability.

Instead of building provider-specific integrations, software vendors can focus on business functionality while relying on a standardized communication layer.

Public Technical Specification

One of the strengths of the SAPI-SK initiative is the availability of public technical documentation.

Developers can access:

OpenAPI 3.0 specification,
Swagger documentation,
authentication endpoints,
document submission endpoints,
document retrieval endpoints,
communication workflows between ERP systems and certified Access Points.

This significantly reduces the complexity of implementing electronic invoicing support.

Our Approach at 4B Software

At 4B Software, we are preparing our ERP solutions for electronic invoicing with a strong focus on flexibility and long-term sustainability.

Our implementation strategy is based on three principles:

compliance with the SAPI-SK standard,
independence from any specific Access Point provider,
a modular integration layer that allows providers to be changed with minimal effort.

This architecture ensures that our customers remain flexible as the electronic invoicing ecosystem continues to evolve.

Looking Ahead

Electronic invoicing represents one of the most significant changes in business software in recent years.

SAPI-SK provides a standardized foundation that simplifies communication between ERP systems and certified Peppol Access Points while reducing implementation complexity for software vendors.

At 4B Software, we continue to monitor legislative and technical developments to ensure our solutions remain fully compliant and ready for the future of electronic invoicing in Slovakia.

Slovak eInvoice Solution for Older Microsoft Dynamics NAV Versions

Wed, 01 Jul 2026 11:00:00 +0000

The upcoming mandatory electronic invoicing (eInvoice) legislation in Slovakia will require companies to exchange invoices electronically in accordance with government regulations.

Many businesses, however, continue to rely on older versions of Microsoft Dynamics NAV that are stable, reliable, and fully support their daily operations.

If you are using:

Microsoft Dynamics NAV 4.0
Microsoft Dynamics NAV 5.0
Microsoft Navision 2009
or any other legacy version of Microsoft Dynamics NAV

there is no need to migrate immediately to Microsoft Dynamics 365 Business Central just to comply with the new eInvoice requirements.

eInvoice Compliance Without a Full ERP Upgrade

At 4B Software, we are developing a solution that enables Slovak eInvoice compliance for older Microsoft Dynamics NAV installations.

Our goal is to allow companies to:

generate electronic invoices compliant with Slovak legislation,
communicate with the Slovak national eInvoice platform,
keep their existing NAV business processes,
minimize changes to their ERP system,
postpone expensive ERP migrations.

Who Is This Solution For?

This solution is ideal for companies that:

still operate older Microsoft Dynamics NAV versions,
have heavily customized NAV environments,
are not ready to migrate to Business Central,
need to comply with Slovak legislation quickly and cost-effectively.

Extensive Microsoft Dynamics NAV Experience

At 4B Software, we have more than 15 years of experience developing, customizing, and integrating Microsoft Dynamics NAV solutions.

Our experience with legacy NAV versions allows us to build reliable integrations that extend the life of existing ERP systems while meeting modern legislative requirements.

Prepare for the New Legislation Today

The Slovak eInvoice system will be introduced gradually, and companies should prepare well in advance to ensure a smooth transition.

If your company is running an older version of Microsoft Dynamics NAV, we would be happy to discuss the available options and propose the most suitable solution for your environment.

Contact 4B Software today to learn how your Microsoft Dynamics NAV system can become compliant with the Slovak eInvoice legislation—without the need for an immediate ERP upgrade.

Update 27.6 for Microsoft Dynamics 365 Business Central 2025 Release Wave 2

Fri, 01 May 2026 11:00:00 +0000

The following link 5086070, lists the cumulative updates that were released for Microsoft Dynamics 365 Business Central in April 2026. The cumulative update is a cumulative set of files that contains all the fixes that were released for Microsoft Dynamics 365 Business Central.

If you need more information, please fill out the contact form or contact our sales department

Mandatory Electronic Invoicing in Slovakia from 2027

Mon, 16 Mar 2026 12:00:00 +0000

Slovakia is preparing the introduction of mandatory electronic invoicing for businesses. The new rules will gradually change the way companies issue, send, and receive invoices. An electronic invoice will no longer be just a PDF document sent by email, but a structured XML document that can be automatically processed by information systems.

What is an electronic invoice

Under the upcoming regulations, an electronic invoice will be created, sent, and received in a structured electronic format. Unlike a standard PDF or scanned document, it will contain data that information systems can process automatically without manual entry.

The European standard EN 16931 will be used, typically in the Peppol BIS 3 (UBL 2.1) format.

Important: Traditional PDF invoices will no longer be considered electronic invoices under the new rules. The key requirement will be the structured XML format.

When mandatory electronic invoicing will start

The implementation will take place gradually in several phases.

2025 – approval of the legislation
2026 – voluntary participation and system testing
2027 – mandatory electronic invoicing for domestic B2B and B2G transactions
2030 – extension to cross-border transactions within the EU

The year 2026 will be crucial for companies. It will be the time to review ERP or accounting systems, prepare integrations, and test the entire process before the mandatory launch.

Who will be affected

The obligation will mainly apply to domestic VAT payers when supplying goods or services within Slovakia. It will also affect invoice recipients, as companies will need to be able not only to issue electronic invoices but also to receive them.

VAT payers involved in domestic B2B transactions
issuance of invoices for goods and services
receiving electronic invoices via a delivery service

When electronic invoicing will not be mandatory

There will still be some exceptions. Mandatory electronic invoicing will not apply, for example, to:

sales to final consumers (B2C)
certain VAT-exempt transactions
simplified invoices up to 100 EUR, such as receipts from fiscal cash registers

How invoices will be sent

Electronic invoices will not be sent via regular email. Instead, they will be exchanged through delivery services operating within the Peppol network.

Companies will choose a certified provider, often referred to as a digital postman, who will ensure the secure sending and receiving of electronic invoices.

secure delivery of electronic invoices
integration with accounting or ERP systems
automatic reporting of selected invoice data to the tax authority

What this means for ERP and accounting systems

Companies will need to verify whether their software supports the creation and processing of invoices in the Peppol BIS format, whether it includes communication with the Peppol network, and whether it allows invoice validation before submission.

Without proper validation, an invoice may be rejected before delivery. The quality of master data will also be critical, especially VAT numbers, addresses, partner identifiers, and tax codes.

How companies can prepare today

Contact your accounting or ERP system provider.
Verify support for the Peppol BIS / UBL format.
Select a suitable delivery service provider.
Check options for XML validation, import, and export.
Clean and update master data for business partners.
Test both sending and receiving of e-invoices before the mandatory launch.

Automatic reporting to the tax authority

The system will also include automatic reporting of selected invoice data to the Slovak tax authority. This does not mean full centralization of invoices, but rather the submission of specific data required for control and fraud prevention.

This reporting will technically be handled by the delivery service provider. For companies, this means that proper configuration and integration will be essential.

Summary

Electronic invoicing will become a major change for Slovak businesses from 2027. Creating a PDF invoice will no longer be sufficient. Companies will need to work with structured XML formats, use the Peppol network, and integrate their systems with a delivery service.

The best step companies can take today is to start preparing early. Verifying ERP capabilities, selecting the right partner, and testing processes during 2026 can significantly reduce the risk of problems once the obligation becomes effective.

If you need more information, please fill out the contact form or contact our sales department

Update 27.4 for Microsoft Dynamics 365 Business Central 2025 Release Wave 2

Sun, 01 Mar 2026 12:00:00 +0000

The following link 5078591, lists the cumulative updates that were released for Microsoft Dynamics 365 Business Central in February 2026. The cumulative update is a cumulative set of files that contains all the fixes that were released for Microsoft Dynamics 365 Business Central.

If you need more information, please fill out the contact form or contact our sales department

Update 27.2 for Microsoft Dynamics 365 Business Central 2025 Release Wave 2

Thu, 01 Jan 2026 12:00:00 +0000

The following link 5073765, lists the cumulative updates that were released for Microsoft Dynamics 365 Business Central in December 2025. The cumulative update is a cumulative set of files that contains all the fixes that were released for Microsoft Dynamics 365 Business Central.

If you need more information, please fill out the contact form or contact our sales department

Update 27.1 for Microsoft Dynamics 365 Business Central 2025 Release Wave 2

Mon, 01 Dec 2025 12:00:00 +0000

The following link 5071096, lists the cumulative updates that were released for Microsoft Dynamics 365 Business Central in Novemnber 2025. The cumulative update is a cumulative set of files that contains all the fixes that were released for Microsoft Dynamics 365 Business Central.

If you need more information, please fill out the contact form or contact our sales department

Update 26.6 for Microsoft Dynamics 365 Business Central 2025 Release Wave 1

Sat, 01 Nov 2025 12:00:00 +0000

The following link 5068248, lists the cumulative updates that were released for Microsoft Dynamics 365 Business Central in October 2025. The cumulative update is a cumulative set of files that contains all the fixes that were released for Microsoft Dynamics 365 Business Central.

If you need more information, please fill out the contact form or contact our sales department

End of support - 2024 release wave 1, version 24.x

Tue, 07 Oct 2025 11:00:00 +0000

Microsoft Dynamics 365 Business Central Version 24 went end of life on the 7th of October, 2025. To ensure your installation is fully supported it is advised to update to version 25 or higher.

If you need more information, please fill out the contact form or contact our sales department.