Creating an x-invoice

step by step

Since January 2025, companies in the B2B sector are required to be able to receive electronic invoices.

The obligation to issue e-invoices—meaning to send them out yourself—will be introduced gradually until December 31, 2027.

That means: now is the perfect time to familiarize yourself with e-invoicing and make your processes future-proof.

What exactly is an e-invoice?

An e-invoice is much more than a PDF file. It is a structured, machine-readable file that can be processed automatically.

In Germany, two formats are particularly relevant:

  • X-Invoice – a pure XML format that contains all mandatory information.
  • ZUGFeRD – a hybrid format combining PDF with embedded XML data, readable for both humans and machines.

This ensures your invoices can be not only stored in compliance with legal requirements but also processed directly by accounting and ERP systems.

Why you should act now

At first, the transition may sound like extra work, but it comes with significant benefits: less paper, fewer errors, faster processes. Those who start early will have far less stress later—especially once e-invoicing for outgoing invoices becomes mandatory in 2027.

What do you need to create an E-invoice?

To issue a compliant e-invoice, you need three things:

If these three conditions are met, you are technically on the safe side.

Is it possible to create e-invoices without software?

The short answer: Yes—but only to a limited extent.

There are online portals that allow you to create e-invoices manually (for example, the free ZRE portal provided by the German federal government). However, this approach is only practical for a small number of invoices. Once you start issuing invoices regularly, it quickly becomes too time-consuming.

There are also some providers—such as XRechnung.io, Cosinex E-Rechnung, orGovernikus—that offer free web forms. These allow you to manually enter XInvoices and generate them directly as XML files.

My tip: For freelancers or self-employed individuals with very few invoices, the portal or online forms can work. For everyone else, using software that automates the process and reduces errors is definitely worthwhile.

What to look for when choosing your e-invoicing software

Not all software is the same. Make sure your solution:

  • Supports both XInvoice and ZUGFeRD
  • Can be integrated into your ERP or accounting system
  • Enables legally compliant archiving
  • Is easy and intuitive to use
  • Provides interfaces for tax advisors and tax authorities


Good software doesn’t just save time—it also saves nerves, especially as your invoice volume grows.

Comparison of 5 x-invoicing software solutions

To make the choice easier, we compared five providers:

Provider/Software Price / month (excl. VAT) Free trial E-invoicing functions*
sevDesk
from 8,90 €
14 days
Create, send, receive, process, validate, visualize, archive/store, DATEV integration
Lexware Office (ehemals lexoffice)
from 6,45 €
30 Tage
Create, send/transmit, receive
Accountable
free
paid from €15.50
14 Tage
Create, send, receive
WISO Mein Büro
free
paid from 9,00 €
mone
Create only
FastBill
from 9,00 €
14 Tage
Create, send, receive

* Please note: Under “e-invoicing functions” we have only listed the features explicitly communicated by the respective provider. FELLOWPRO assumes no responsibility for the completeness of this information.

Step by step: How to create your first e-invoice

By following these steps, you not only create a legally compliant XInvoice but also align your processes with the future.

Conclusion: Starting now pays off

The earlier you begin the transition, the smoother things will be when the obligation to issue XInvoices takes effect in 2027. With the right software and a clear process, you save time, reduce errors, and make your company ready for the digital future.

Image credits: Header- & featured image by Freepik

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