Key takeaways
- Efficiency and accuracy: E-invoicing replaces paper invoices with structured digital formats (like XML or Peppol BIS), reducing errors and speeding up processing.
- Compliance and integration: Electronic invoices ensure regulatory compliance, improve data security, and integrate seamlessly with accounting and ERP systems.
- Sustainability and savings: By cutting paper use and manual handling, e-invoicing lowers costs, supports eco-friendly operations, and enhances business transparency.
In short: An e-invoice is an invoice sent and received in a structured digital format, such as XML, so systems can process it automatically. Scans, plain PDFs and photos don’t count. E-invoicing cuts costs and errors, and more and more EU countries now require it.
In today's fast-paced business world, efficiency and smooth operations are key to success. One area where you can make big gains is invoicing. Paper invoicing can be clumsy, slow, and full of errors. That’s where electronic invoicing, or e-invoicing, comes in.
What is e-invoicing?
E-invoicing means issuing, sending, and storing invoices in a purely electronic format. It is the digital version of a paper invoice. It covers more than just sending the invoice electronically. It also covers how the invoice is created and processed. And it covers how it links into the accounting systems of both the sender and the receiver.
An e-invoice usually holds the same details as a traditional invoice. These include supplier details, customer details, date, invoice number, and a description of the goods or services. They also include amounts, VAT, and the total due. But an e-invoice uses a standard electronic format. This means different accounting systems can process it easily.
What does and doesn’t qualify as an e-invoice?
An e-invoice is a billing document sent and received in a structured digital format (such as XML). This lets systems process it automatically and electronically. Anything that does not meet these criteria is not an electronic invoice.
The following would not qualify as e-invoices:
Scanned copies of paper invoices: A paper invoice that is scanned and sent by email is still not an electronic invoice. It is not in a structured format that systems can process automatically.
PDFs not suitable for automated processing: PDFs are digital. But if systems can’t automatically pull out and process the data, they aren’t electronic invoices.
Email text: Invoices that are just written in the body of an email, without a structured, electronic format.
Photo images of invoices: Pictures taken of a paper invoice and sent digitally.
Word documents: Invoices made in word processing software and sent as document files, unless they're structured for automated processing.
Unstructured data files: Any digital file that holds invoice data, but not in a structured format that allows automated electronic processing.
The key feature of an electronic invoice is that it can feed straight into automated accounting systems. This allows electronic data exchange with no need for manual entry.
Some of the most common e-invoicing formats include:
XML: Extensible Markup Language is a flexible, structured data format. Machines can read XML, and it can be built to fit many invoicing standards. It's widely used in B2B transactions. Related reading: Latvia introduces mandatory B2B e-invoicing.
EDI (Electronic Data Interchange): EDI is a standard for exchanging data by any electronic means. It's a structured data format. It is used mainly by larger organizations and for complex supply chains.
Peppol BIS (Business Interoperability Specifications): Peppol BIS is a set of specifications from the Pan-European Public Procurement Online (PEPPOL) project. It aims to standardize electronic transactions in public procurement. Its invoice specifications are widely used in Europe and other regions.
UBL (Universal Business Language): UBL is based on XML. It is designed as an open library of standard electronic XML business documents. It's used more and more for government and international transactions.
cXML (Commerce XML): This standard was built for the internet-based ecommerce community. It aims to make electronic catalog updates and purchasing transactions smoother.
JSON (JavaScript Object Notation): JSON is less common for e-invoicing. It is a lightweight data-interchange format. Humans can read and write it easily, and machines can easily parse and generate it.
What are the benefits of electronic invoicing?
Electronic invoicing offers several key benefits for businesses:
Cost reduction: E-invoicing removes the need for paper-based processes. This cuts the costs of paper, printing, postage, and storage. It also reduces manual data entry and processing errors, which lowers running costs even more.
Improved efficiency: Electronic invoices are processed and delivered instantly, which speeds up billing. This leads to faster payment cycles and better cash flow. Automated invoicing also cuts manual tasks. Your staff can then focus on more strategic work.
Enhanced accuracy: E-invoicing reduces the errors that are common with manual data entry. Standard templates and automated systems keep your billing consistent and accurate.
Better tracking and management: Electronic invoices are easy to track and manage. You can check the status of invoices in real time. This helps you spot and fix any issues or delays quickly. It improves your overall financial management and forecasting.
Environmental benefits: E-invoicing uses less paper, so it is more environmentally friendly. It supports a company’s sustainability efforts by lowering its carbon footprint.
Compliance and security: E-invoicing systems often have strong security features. They also comply with legal and tax rules in different jurisdictions. They can update automatically when tax laws or business rules change. This keeps you compliant over time.
Improved supplier and customer relationships: E-invoicing is efficient and accurate, which can improve your relationships with suppliers and customers. Clear, timely, and accurate billing builds trust and reduces disputes.
Data analysis and reporting: E-invoicing systems can give you useful insights into your financial transactions. They allow detailed data analysis. This helps you spot trends, manage spending, and make informed decisions.
Global reach: E-invoicing makes cross-border transactions easier, even with different currencies and tax systems. This supports international trade.
Integration with other systems: You can link e-invoicing with other business systems, such as accounting software and supply chain management systems. This gives you a single view of your financial transactions. It also helps you manage your business as a whole.
How does e-invoicing work?
How are e-invoices created and formatted?
E-invoices are created in a standard format. This means different systems can process and understand them easily, across borders too. Formats like XML are common, but specific standards can vary between countries.
How are e-invoices sent and received?
Once an e-invoice is created, it is sent electronically. This often happens through a secure e-invoicing network or platform. The recipient's accounting system receives the invoice. There, it is processed and integrated automatically.
How should e-invoices be stored?
You must store e-invoices securely. They must stay intact and accessible for legal and audit purposes. The EU sets specific storage periods and conditions. These ensure compliance and make VAT inspections easier.
How does e-invoicing work in the EU?
The European Union has long encouraged digital financial transactions. It sees e-invoicing as a crucial part of this. The push is part of a wider effort to streamline and standardize financial processes across member states. The aim is to boost efficiency, reduce fraud, and promote a digital single market.
E-invoicing requirements in the EU began with Directive 2014/55/EU. This directive requires e-invoicing for public procurement contracts. It aims to standardize e-invoices across EU member states. This makes them compatible and interoperable across borders.
Since the directive was adopted, EU member states have been building e-invoicing into their national systems. How far they have gone varies, and some have added extra mandates. Some countries have moved beyond public procurement and require e-invoicing for all business transactions. Others are still in the transition phase.
France, for example, is making B2B e-invoicing mandatory in stages. Since September 1, 2026, all businesses must be able to receive e-invoices, and large and mid-sized companies must issue them. Small and micro businesses must issue them from September 1, 2027. Greece is phasing in a similar mandate, covered in our guide to B2B e-invoicing in Greece. For a closer look, see Guidance on Germany’s 2025 E-Invoicing Mandate Released.
How can you get help with electronic invoicing?
The need to issue and receive electronic invoices is now becoming common. So businesses must understand e-invoicing and how it works. You need to keep up with changing e-invoice rules, as well as technology. We cover this in more detail in Germany adopts e-invoicing mandate.
Our new e-invoicing software, SyncTax, is designed to link smoothly with your accounting system. It captures invoice details with ease and keeps you compliant with VAT rules. The software converts and submits each invoice to the relevant authority. It also makes sure you follow electronic archiving rules.
To find out about our e-invoicing solution and SyncTax products, drop us an email at mycompliance@taxually.com.
How Taxually handles this
Taxually’s e-invoicing API sends structured invoices to each country’s clearance platform, such as Italy’s SDI, Poland’s KSeF and Peppol networks, covering 32 countries from one integration. The VAT returns those invoices feed into are filed through CrossTax on the same platform.
Related guides
Frequently asked questions
What is e-invoicing and how is it different from traditional invoicing?
E-invoicing is the creation, transmission, and storage of invoices in a structured electronic format (like XML or Peppol BIS) that allows for automated processing. Unlike paper or PDF invoices, e-invoices integrate directly into accounting systems without manual entry.
What are the main benefits of switching to e-invoicing?
E-invoicing reduces costs, speeds up payments, improves accuracy, and ensures compliance with tax regulations. It also supports sustainability efforts by eliminating paper and enables better financial visibility and reporting.
Is e-invoicing mandatory in the EU?
Yes, for public procurement. Under EU Directive 2014/55/EU, all public sector entities must accept e-invoices. Several countries, including France (from September 2026), are extending the requirement to all B2B transactions.
