The Future of Modern Invoicing Processes

Comprehensive solutions for the
Compliance with the e-invoicing requirement

The Future of Modern Invoicing Processes

Comprehensive Solutions
for compliance
the e-invoicing requirement

Mandatory E-Invoicing Starting in 2025

The Future of Modern Invoicing Processes

Comprehensive solutions for the
Compliance with the e-invoicing requirement

More Transparency and Control

Bring Structure and Efficiency to Your Billing Processes

As of January 1, 2025, all companies based in Germany that operate in the B2B sector must be able to receive e-invoices. Effective January 1, 2027, the reporting requirement applies to companies with prior-year revenue exceeding 800,000 euros (detailed requirements). Invoices must be in a structured, machine-readable format that complies with EN 16931. Starting January 1, 2028, e-invoices will be mandatory for businesses of all sizes. So far, so mandatory. But the new legal requirements offer businesses a real opportunity:

  • Examine and optimize existing processes
  • Driving Digital Transformation in the Company
  • To make communication with customers and suppliers more efficient.

Take advantage of this transition to reduce manual invoicing processes and instead adopt a fully digital approach. With our centralized e-invoice processing solution, you can integrate the individual steps into a transparent and efficient end-to-end process—from the provision of invoice data through conversion, validation, and delivery to monitoring and archiving.
E-invoicing can be integrated into your existing system landscape: Invoice data is retrieved from your ERP system, converted into the required e-invoice format—such as XRechnung or ZUGFeRD—and sent to your business partners via the appropriate transmission channel. A central e-invoicing dashboard lets you keep track of the entire process. This way, you not only meet the requirements for e-invoicing but also lay the foundation for automated, transparent, and future-proof processes with your customers and suppliers.

More Transparency and Control
Bring Structure and Efficiency to Your Billing Processes

As of January 1, 2025, all companies based in Germany that operate in the B2B sector must be able to receive e-invoices. Effective January 1, 2027, the reporting requirement applies to companies with prior-year revenue exceeding 800,000 euros (detailed requirements). Invoices must be in a structured, machine-readable format that complies with EN 16931. Starting January 1, 2028, e-invoices will be mandatory for businesses of all sizes. So far, so mandatory. But the new legal requirements offer businesses a real opportunity:

  • Examine and optimize existing processes
  • Driving Digital Transformation in the Company
  • To make communication with customers and suppliers more efficient.

Take advantage of this transition to reduce manual invoicing processes and instead adopt a fully digital approach. With our centralized e-invoice processing solution, you can integrate the individual steps into a transparent and efficient end-to-end process—from the provision of invoice data through conversion, validation, and delivery to monitoring and archiving.
E-invoicing can be integrated into your existing system landscape: Invoice data is retrieved from your ERP system, converted into the required e-invoice format—such as XRechnung or ZUGFeRD—and sent to your business partners via the appropriate transmission channel. A central e-invoicing dashboard lets you keep track of the entire process. This way, you not only meet the requirements for e-invoicing but also lay the foundation for automated, transparent, and future-proof processes with your customers and suppliers.

EDI Integration and Strategy Consulting at CAS-AG
EDI Integration and Strategy Consulting at CAS-AG
Transparency and Control
Bring Structure and Efficiency to Your Billing Processes

As of January 1, 2025, all companies based in Germany that operate in the B2B sector must be able to receive e-invoices. Effective January 1, 2027, the reporting requirement applies to companies with prior-year revenue exceeding 800,000 euros (detailed requirements). Invoices must be in a structured, machine-readable format that complies with EN 16931. Starting January 1, 2028, e-invoices will be mandatory for businesses of all sizes. So far, so mandatory. But the new legal requirements offer businesses a real opportunity:

  • Examine and optimize existing processes
  • Driving Digital Transformation in the Company
  • To make communication with customers and suppliers more efficient.

Take advantage of this transition to reduce manual invoicing processes and instead adopt a fully digital approach. With our centralized e-invoice processing solution, you can integrate the individual steps into a transparent and efficient end-to-end process—from the provision of invoice data through conversion, validation, and delivery to monitoring and archiving.
E-invoicing can be integrated into your existing system landscape: Invoice data is retrieved from your ERP system, converted into the required e-invoice format—such as XRechnung or ZUGFeRD—and sent to your business partners via the appropriate transmission channel. A central e-invoicing dashboard lets you keep track of the entire process. This way, you not only meet the requirements for e-invoicing but also lay the foundation for automated, transparent, and future-proof processes with your customers and suppliers.

Our expertise

Understand e-invoicing processes, be familiar with standards, and integrate systems.

For over 35 years, we have been developing and implementing solutions for electronic data exchange between companies. Our experience ranges from established EDI and industry standards to today’s e-invoicing requirements.

Whether it’s EDIFACT, EANCOM®, XRechnung, or ZUGFeRD: We are familiar with the various standards and formats and ensure that they are reliably integrated into your existing system landscape and business processes. To this end, we rely, among other things, on established GS1 standards to ensure standardized and efficient data exchange with customers and suppliers.

Our strength lies not only in our technology, but also in the combination of standards, integration, and process expertise. The result is an e-invoicing solution that fits your existing systems, the requirements of your business partners, and your specific processes.

Your benefits:

  • Less Complexity in Data Exchange
  • Standard-compliant and reliable processes
  • Flexible Integration of New Business Partners
  • High Level of Automation
  • Long-Term Cost-Saving Potential
  • The solution scales with your needs
CaseManager: Digital Master Data

Harnessing the Potential of E-Invoicing

A centralized e-invoicing dashboard consolidates various systems and processes, creating end-to-end and transparent workflows. The e-invoicing requirement offers an opportunity to digitize existing processes and further develop your digitization strategy in a targeted manner.

Explore additional digitization options in the B2B and B2G sectors and take advantage of industry standards for automated communication, such as EDIFACT, EANCOM, XRechnung, and ZUGFeRD.

Watch our webcasts to learn how we can help you comply with the e-invoicing requirement.

Our expertise

Understand e-invoicing processes, be familiar with standards, and integrate systems.

For over 35 years, we have been developing and implementing solutions for electronic data exchange between companies. Our experience ranges from established EDI and industry standards to today’s e-invoicing requirements.

Whether it’s EDIFACT, EANCOM®, XRechnung, or ZUGFeRD: We are familiar with the various standards and formats and ensure that they are reliably integrated into your existing system landscape and business processes. To this end, we rely, among other things, on established GS1 standards to ensure standardized and efficient data exchange with customers and suppliers.

Our strength lies not only in our technology, but also in the combination of standards, integration, and process expertise. The result is an e-invoicing solution that fits your existing systems, the requirements of your business partners, and your specific processes.

Your benefits:

  • Less Complexity in Data Exchange
  • Standard-compliant and reliable processes
  • Flexible Integration of New Business Partners
  • High Level of Automation
  • Long-Term Cost-Saving Potential
  • The solution scales with your needs
Unified Invoice Hub as a Solution for Implementing the E-Invoicing Requirement

Harnessing the Potential of E-Invoicing

A centralized e-invoicing dashboard consolidates various systems and processes, creating end-to-end and transparent workflows. The e-invoicing requirement offers an opportunity to digitize existing processes and further develop your digitization strategy in a targeted manner.

Explore additional digitization options in the B2B and B2G sectors and take advantage of industry standards for automated communication, such as EDIFACT, EANCOM, XRechnung, and ZUGFeRD.

Watch our webcasts to learn how we can help you comply with the e-invoicing requirement.

Our expertise

Understand e-invoicing processes, be familiar with standards, and integrate systems.

For over 35 years, we have been developing and implementing solutions for electronic data exchange between companies. Our experience ranges from established EDI and industry standards to today’s e-invoicing requirements.

Whether it’s EDIFACT, EANCOM®, XRechnung, or ZUGFeRD: We are familiar with the various standards and formats and ensure that they are reliably integrated into your existing system landscape and business processes. To this end, we rely, among other things, on established GS1 standards to ensure standardized and efficient data exchange with customers and suppliers.

Our strength lies not only in our technology, but also in the combination of standards, integration, and process expertise. The result is an e-invoicing solution that fits your existing systems, the requirements of your business partners, and your specific processes.

Your benefits:

  • Less Complexity in Data Exchange
  • Standard-compliant and reliable processes
  • Flexible Integration of New Business Partners
  • High Level of Automation
  • Long-Term Cost-Saving Potential
  • The solution scales with your needs
Unified Invoice Hub as a Solution for Implementing the E-Invoicing Requirement

Harnessing the Potential of E-Invoicing

A centralized e-invoicing dashboard consolidates various systems and processes, creating end-to-end and transparent workflows. The e-invoicing requirement offers an opportunity to digitize existing processes and further develop your digitization strategy in a targeted manner.

Explore additional digitization options in the B2B and B2G sectors and take advantage of industry standards for automated communication, such as EDIFACT, EANCOM, XRechnung, and ZUGFeRD.

Watch our webcasts to learn how we can help you comply with the e-invoicing requirement.

Your Starting Point —Where Do You Stand?

Getting Started with E-Billing

You want to know what you need and how to prepare your existing systems.

Supplement EDI processes

Existing connections should be maintained and expanded to include e-invoicing requirements.

Complex customer and supplier requirements

The goal is to enable centralized management of different formats, channels, and partners.

Your Starting Point —Where Do You Stand?

Getting Started with E-Billing

You want to know what you need and how to prepare your existing systems.

Supplement EDI processes

Existing connections should be maintained and expanded to include e-invoicing requirements.

Complex customer and supplier requirements

The goal is to enable centralized management of different formats, channels, and partners.

Your Starting Point —Where Do You Stand?
Getting Started with E-Billing

You want to know what you need and how to prepare your existing systems.

Supplement EDI processes

Existing connections should be maintained and expanded to include e-invoicing requirements.

Complex customer and supplier requirements

The goal is to enable centralized management of different formats, channels, and partners.

Working Together from the Initial Idea to a Successful E-Invoicing Process

Direction and a Clear Strategy

Together, we’ll take a look at your customers’ and suppliers’ existing systems, processes, and requirements. Based on this, we develop a strategy for your e-invoicing processes that is tailored to your goals.

A Solution That Fits

Standard, where appropriate. Flexibility where it’s needed. We integrate existing systems and processes with the appropriate technologies into your existing IT infrastructure.

From Design to Operation

Our experts work closely with your teams. From the initial analysis through technical implementation and rollout to ongoing operations, we support you with a hands-on approach and as equals.

Working Together from the Idea to Success
E-Invoicing Process

Direction and a Clear Strategy

Together, we’ll take a look at your customers’ and suppliers’ existing systems, processes, and requirements. Based on this, we develop a strategy for your e-invoicing processes that is tailored to your goals.

A Solution That Fits

Standard, where appropriate. Flexibility where it’s needed. We integrate existing systems and processes with the appropriate technologies into your existing IT infrastructure.

From Design to Operation

Our experts work closely with your teams. From the initial analysis through technical implementation and rollout to ongoing operations, we support you with a hands-on approach and as equals.

Working Together from the Idea to Success
E-Invoicing Process

Direction and a Clear Strategy

Together, we’ll take a look at your existing systems and processes, as well as the needs of your customers and suppliers. Based on this, we develop a strategy for your e-invoicing processes that is tailored to your goals.

A Solution That Fits

Standard, where appropriate. Flexibility where it’s needed. We integrate existing systems and processes with the appropriate technologies into your existing IT infrastructure.

From Design to Operation

Our experts work closely with your teams. From the initial analysis through technical implementation and rollout to ongoing operations, we support you with a hands-on approach and as equals.

Frequently Asked Questions

FAQ E-Invoicing Requirement

1. Will e-billing be mandatory starting in 2027?

E-invoicing has been gradually becoming mandatory since January 1, 2025.

Effective January 1, 2027, all B2B companies based in Germany must be able to receive and send invoices in a structured, machine-readable format in accordance with EN 16931. An exception applies to companies with annual total revenue of less than 800,000 euros, which will be required to comply starting January 1, 2028.

Paper invoices and PDF files are no longer sufficient for this purpose. EDIFACT and other compatible formats can still be used.

2. What does the e-invoicing requirement mean?

The e-invoicing requirement involves the phased introduction of receiving and sending structured electronic invoices, as well as the associated requirements for formats, processes, and systems. Companies can benefit from advantages such as time and cost savings in the long term.

3. Who is subject to the e-invoicing requirement?

In general, all companies are subject to the e-invoicing requirement and must be able to receive electronic invoices as of January 1, 2025.

Since the requirement to send e-invoices is being phased in gradually, exceptions apply until December 31, 2027, for the issuance and transmission of invoices by businesses with total annual revenue of < 800,000 euros.

Starting January 1, 2028, all companies must be able to receive, issue, and send invoices.

4. Is e-invoicing via SAP mandatory?

Structured and electronic formats are mandatory (CEN Standard EN 16931). For example, the XRechnung and ZUGFeRD formats can be created and sent directly from SAP using an SAP add-on solution.

5. How does CAS AG assist with the implementation of the e-invoicing requirement?

CAS AG helps companies comply with the e-invoicing requirement. By integrating a central e-invoicing platform into the existing system landscape, we help companies achieve greater transparency and control, as well as a future-proof foundation for electronic invoice exchange.

Through our collaboration with our partner companies, we offer a wide range of solutions and options. We provide consulting services regarding both the technical design and the implementation.

Frequently Asked Questions
FAQ E-Invoicing Requirement

1. Will e-billing be mandatory starting in 2027?

E-invoicing has been gradually becoming mandatory since January 1, 2025.

Effective January 1, 2027, all B2B companies based in Germany must be able to receive and send invoices in a structured, machine-readable format in accordance with EN 16931. An exception applies to companies with annual total revenue of less than 800,000 euros, which will be required to comply starting January 1, 2028.

Paper invoices and PDF files are no longer sufficient for this purpose. EDIFACT and other compatible formats can still be used.

2. What does the e-invoicing requirement mean?

The e-invoicing requirement involves the phased introduction of receiving and sending structured electronic invoices, as well as the associated requirements for formats, processes, and systems. Companies can benefit from advantages such as time and cost savings in the long term.

3. Who is subject to the e-invoicing requirement?

In general, all companies are subject to the e-invoicing requirement and must be able to receive electronic invoices as of January 1, 2025.

Since the requirement to send e-invoices is being phased in gradually, exceptions apply until December 31, 2027, for the issuance and transmission of invoices by businesses with total annual revenue of < 800,000 euros.

Starting January 1, 2028, all companies must be able to receive, issue, and send invoices.

4. Is e-invoicing via SAP mandatory?

Structured and electronic formats are mandatory (CEN Standard EN 16931). For example, the XRechnung and ZUGFeRD formats can be created and sent directly from SAP using an SAP add-on solution.

5. How does CAS AG assist with the implementation of the e-invoicing requirement?

CAS AG helps companies comply with the e-invoicing requirement. By integrating a central e-invoicing platform into the existing system landscape, we help companies achieve greater transparency and control, as well as a future-proof foundation for electronic invoice exchange.

Through our collaboration with our partner companies, we offer a wide range of solutions and options. We provide consulting services regarding both the technical design and the implementation.

Frequently Asked Questions
FAQ E-Invoicing Requirement

1. Will e-billing be mandatory starting in 2027?

E-invoicing has been gradually becoming mandatory since January 1, 2025.

Effective January 1, 2027, all B2B companies based in Germany must be able to receive and send invoices in a structured, machine-readable format in accordance with EN 16931. An exception applies to companies with annual total revenue of less than 800,000 euros, which will be required to comply starting January 1, 2028.

Paper invoices and PDF files are no longer sufficient for this purpose. EDIFACT and other compatible formats can still be used.

2. What does the e-invoicing requirement mean?

The e-invoicing requirement involves the phased introduction of receiving and sending structured electronic invoices, as well as the associated requirements for formats, processes, and systems. Companies can benefit from advantages such as time and cost savings in the long term.

3. Who is subject to the e-invoicing requirement?

In general, all companies are subject to the e-invoicing requirement and must be able to receive electronic invoices as of January 1, 2025.

Since the requirement to send e-invoices is being phased in gradually, exceptions apply until December 31, 2027, for the issuance and transmission of invoices by businesses with total annual revenue of < 800,000 euros.

Starting January 1, 2028, all companies must be able to receive, issue, and send invoices.

4. Is e-invoicing via SAP mandatory?

Structured and electronic formats are mandatory (CEN Standard EN 16931). For example, the XRechnung and ZUGFeRD formats can be created and sent directly from SAP using an SAP add-on solution.

5. How does CAS AG assist with the implementation of the e-invoicing requirement?

CAS AG helps companies comply with the e-invoicing requirement. By integrating a central e-invoicing platform into the existing system landscape, we help companies achieve greater transparency and control, as well as a future-proof foundation for electronic invoice exchange.

Through our collaboration with our partner companies, we offer a wide range of solutions and options. We provide consulting services regarding both the technical design and the implementation.

Excerpt from Our Project Examples

  • By switching to a central warehouse for supplying its stores, DOUGLAS was able to achieve significant efficiency gains. The fact that the necessary changes to the store systems were implemented on time and to a high standard is also due to the consultants at CAS AG, who will continue to support DOUGLAS in the future as it works to effectively implement new innovations in the world of SAP technology.

  • As a next-generation ERP system, SAP S/4HANA supports companies in their digital transformation. However, when implementing these changes, many companies face numerous challenges—challenges that our experts, such as those at the beeline Group, successfully guide and support them through. Here's how the costume jewelry expert successfully migrated its inventory management system to SAP S/4HANA.

  • As the IT service provider for Ernsting’s family—this year’s winner of the reta award in the Supply Chain Excellence category—CAS AG has received the Top Supplier Retail 2025 award. Here's what lies behind the innovative technology solution for Ernsting’s family, featuring cloud-first architecture, co-innovation with SAP OPP, and the CAS Store Integration Bus...

  • Gries Deco Company, the operator of the Depot home decor and furnishings stores, uses high-quality forecasts based on the SAP CAR module Unified Demand Forecasts (SAP UDF) for its in-house development. Learn more about it.

Excerpt from Our Project Examples

  • By switching to a central warehouse for supplying its stores, DOUGLAS was able to achieve significant efficiency gains. The fact that the necessary changes to the store systems were implemented on time and to a high standard is also due to the consultants at CAS AG, who will continue to support DOUGLAS in the future as it works to effectively implement new innovations in the world of SAP technology.

  • As a next-generation ERP system, SAP S/4HANA supports companies in their digital transformation. However, when implementing these changes, many companies face numerous challenges—challenges that our experts, such as those at the beeline Group, successfully guide and support them through. Here's how the costume jewelry expert successfully migrated its inventory management system to SAP S/4HANA.

  • As the IT service provider for Ernsting’s family—this year’s winner of the reta award in the Supply Chain Excellence category—CAS AG has received the Top Supplier Retail 2025 award. Here's what lies behind the innovative technology solution for Ernsting’s family, featuring cloud-first architecture, co-innovation with SAP OPP, and the CAS Store Integration Bus...

  • Gries Deco Company, the operator of the Depot home decor and furnishings stores, uses high-quality forecasts based on the SAP CAR module Unified Demand Forecasts (SAP UDF) for its in-house development. Learn more about it.

Excerpt from Our Project Examples

  • By switching to a central warehouse for supplying its stores, DOUGLAS was able to achieve significant efficiency gains. The fact that the necessary changes to the store systems were implemented on time and to a high standard is also due to the consultants at CAS AG, who will continue to support DOUGLAS in the future as it works to effectively implement new innovations in the world of SAP technology.

  • As a next-generation ERP system, SAP S/4HANA supports companies in their digital transformation. However, when implementing these changes, many companies face numerous challenges—challenges that our experts, such as those at the beeline Group, successfully guide and support them through. Here's how the costume jewelry expert successfully migrated its inventory management system to SAP S/4HANA.

  • As the IT service provider for Ernsting’s family—this year’s winner of the reta award in the Supply Chain Excellence category—CAS AG has received the Top Supplier Retail 2025 award. Here's what lies behind the innovative technology solution for Ernsting’s family, featuring cloud-first architecture, co-innovation with SAP OPP, and the CAS Store Integration Bus...

  • Gries Deco Company, the operator of the Depot home decor and furnishings stores, uses high-quality forecasts based on the SAP CAR module Unified Demand Forecasts (SAP UDF) for its in-house development. Learn more about it.

Learn more about mandatory e-invoicing !

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Selin Meier-Senger, Sales Manager, CAS Products-Retail

+49 234 9359739

Selin.Meier-Senger@c-a-s.de