E-Invoice for Beginners: Everything About XRechnung and ZUGFeRD Simply Explained

Since January 2025, the E-invoice obligation applies in Germany in the B2B sector. At the latest now you must deal with the topic as a self-employed person or entrepreneur. But don't worry: E-invoice sounds more technical than it is. In this beginner's guide, I'll explain everything important - from basics to practical implementation.

What Is an E-Invoice Anyway?

The Definition

An E-invoice (electronic invoice) is not simply a PDF via email. That's a widespread misconception. A real E-invoice is a structured data record that can be automatically read and processed by computer systems.

Not an E-invoice:

• PDF invoice via email
• Scanned paper invoice
• Word or Excel document

Real E-invoice:

• Machine-readable XML format
• Structured data according to EU standard EN 16931
• Automatically processable

Why the Difference Matters

With a PDF, a human must read the data and manually enter it into bookkeeping. With an E-invoice, this happens automatically - data flows directly into the system. This saves time, reduces errors and makes bookkeeping more efficient.

The E-Invoice Obligation: What Applies When?

The Timeline in Germany

What Does This Mean Concretely?

From Now (2025):

• You must be able to receive E-invoices
• An email inbox is sufficient for this
• You can still send PDF invoices (transition regulation)

From 2027/2028:

• You must send E-invoices in correct format
• PDF alone is no longer sufficient
• Applies to all B2B business (company to company)

Exceptions

E-invoice obligation does not apply to:

• Invoices to private individuals (B2C)
• Small amount invoices under 250 €
• Travel tickets and certain tax-free services

XRechnung vs. ZUGFeRD: The Two Standards

In Germany there are two E-invoice formats that both comply with EU standard. Here are the differences:

XRechnung

What is it? XRechnung is a pure XML format - so a pure data file without visual PDF. It was developed especially for exchange with public clients.

Characteristics:

• Pure XML format (not human-readable)
• Standard for authorities and public clients
• Very strict validation rules
• Requires Leitweg-ID for authorities

When do you need XRechnung?

• Invoices to federal authorities
• Invoices to state authorities (depending on federal state)
• Invoices to public clients

ZUGFeRD

What is it? ZUGFeRD (Central User Guide of the Forum Electronic Invoice Germany) is a hybrid format: It combines a normal PDF with embedded XML data.

Characteristics:

• PDF + embedded XML
• Human-readable AND machine-readable
• Various profiles (from simple to complex)
• More flexible to use than XRechnung

When is ZUGFeRD the better choice?

• Invoices to other companies (B2B)
• When recipient also needs a readable PDF
• For most business relationships

The Direct Comparison

My Recommendation

For most freelancers and small companies, ZUGFeRD is the more practical choice:

• Your clients see a normal PDF
• Machine data is still there
• It works for almost all use cases

You only need XRechnung if you regularly invoice to authorities.

The ZUGFeRD Profiles Explained

ZUGFeRD comes in various "profiles" - from simple to complex:

Minimum

• Only absolutely necessary data
• Sufficient for simple invoices
• Doesn't fully comply with EU standard

Basic / Basic WL

• Basic invoice data
• Suitable for most B2B invoices
• "WL" = Without Lines (without individual items)

EN 16931 (Comfort)

• Fully EU-standard compliant
• Detailed item data
• Recommended for E-invoice obligation

Extended

• Maximum detail level
• For complex business processes
• Industry-specific extensions possible

Which Profile Do You Need?

For E-invoice obligation from 2025, you should use at least EN 16931 (Comfort). Most modern invoicing tools automatically create this profile.

Practical Implementation: How to Create E-Invoices

Option 1: Use Invoicing Software

The easiest way: Software that automatically creates E-invoices.

Advantages:

• No technical knowledge needed
• Format is automatically created correctly
• Updates with law changes included
• Validation before dispatch

What to watch for:

• XRechnung support (if you invoice to authorities)
• ZUGFeRD support (for B2B)
• Current profile (at least EN 16931)
• GDPR compliance

Option 2: Online Converter

There are free tools that convert PDFs to E-invoices. This works, but has disadvantages:

Disadvantages:

• Manual data entry needed
• Error-prone
• Time-consuming with many invoices
• Privacy questionable with free tools

Option 3: Bookkeeping Software

Many bookkeeping programs like DATEV, Lexware or sevDesk now support E-invoices.

Receive and Process E-Invoices

What You Need

To receive E-invoices, you need:

1. An email inbox - that's enough for the start
2. Software for display - you open ZUGFeRD PDFs like normal PDFs
3. Optional: Processing software - to automatically import XML data

How to Handle Incoming E-Invoices

With ZUGFeRD:

1. Open PDF and check visually
2. If needed: Import XML data into bookkeeping
3. Archive invoice (GoBD-compliant!)

With XRechnung:

1. Open XML file with viewer or import into software
2. Check data
3. Archive

Free Viewers for E-Invoices

• Quba Viewer (free, open source)
• Factur-X Viewer (for ZUGFeRD)
• KoSIT Check Tool (for XRechnung validation)

Common Mistakes with E-Invoices

Mistake 1: PDF via Email = E-Invoice

Problem: Many think a PDF via email is already an E-invoice.

Correct: A real E-invoice needs structured XML data - either as separate file (XRechnung) or embedded in PDF (ZUGFeRD).

Mistake 2: Wrong or Outdated Format

Problem: Some tools create outdated ZUGFeRD versions or incomplete data.

Solution: Check if your tool supports ZUGFeRD 2.1 or higher with profile EN 16931.

Mistake 3: Missing Mandatory Information

Problem: E-invoices have strict requirements for mandatory fields.

Important Mandatory Information:

• Invoice number
• Invoice date
• Service date
• Seller and buyer data
• Tax number or VAT ID
• Individual items with quantity, price, tax rate
• Total amounts

Mistake 4: No Validation Before Dispatch

Problem: Faulty E-invoices are rejected by recipient.

Solution: Use a tool with built-in validation or check with KoSIT check tool.

Mistake 5: Wrong Archiving

Problem: E-invoices not archived GoBD-compliant.

Correct: E-invoices must be archived audit-proof for 10 years - in the format they were received.

The Leitweg-ID: Important for Authorities

If you invoice to public clients, you need the Leitweg-ID.

What Is the Leitweg-ID?

The Leitweg-ID is an address that routes your invoice to the right authority and department. It consists of:

• Coarse addressing (authority)
• Fine addressing (department/cost center)
• Check digit

Example: 991-12345-67

Where Do You Get the Leitweg-ID?

You get the Leitweg-ID from your client. It should be in the order or contract. In doubt: ask!

When Is It Mandatory?

The Leitweg-ID is mandatory with:

• Federal authorities (always)
• State authorities (depending on federal state)
• Municipalities (differently regulated)

Checklist: Are You Ready for E-Invoice?

Receive (Mandatory from 2025)

• [ ] Email inbox for E-invoices available
• [ ] Software can open ZUGFeRD PDFs
• [ ] Optional: Viewer for XRechnung installed
• [ ] Archiving process defined

Send (Mandatory from 2027/2028)

• [ ] Invoicing software supports E-invoice
• [ ] ZUGFeRD 2.1+ with profile EN 16931
• [ ] For authorities: XRechnung support
• [ ] All mandatory information is captured
• [ ] Validation before dispatch possible

The Advantages of E-Invoice

Even though the changeover initially means effort - the advantages outweigh:

For You as Invoice Issuer

• Faster payment: E-invoices are paid on average 5-7 days faster
• Fewer errors: Automatic validation prevents form errors
• Future-proof: You're prepared for the obligation
• Professional appearance: Modern companies expect E-invoices

For the Recipient

• Automatic processing: No manual data entry
• Fewer errors: No typing errors during transfer
• Faster bookkeeping: Data flows directly into system
• Better overview: All data available structured

Clever Invoice: E-Invoice Made Simple

With Clever Invoice, you create E-invoices without technical prior knowledge:

• ZUGFeRD 2.1 with profile EN 16931 automatic
• XRechnung for authorities with Leitweg-ID
• Validation before dispatch
• Simple creation via chat or form
• All mandatory information automatically checked
• GoBD-compliant archiving included
• DATEV export for your tax advisor

Conclusion: E-Invoice Is Simpler Than Thought

E-invoice sounds technical, but is no rocket science with the right tools. The most important points:

The most important insights:

1. E-invoice ≠ PDF via email - it needs structured XML data
2. ZUGFeRD for most - PDF + XML is the most practical solution
3. XRechnung for authorities - pure XML with strict rules
4. 2025: Be able to receive - an email inbox is enough
5. 2027/2028: Must send - prepare now!

The changeover to E-invoice is an opportunity to modernize your processes. With the right software, you barely notice the difference - except that everything runs faster and more error-free.

Ready for E-invoice? Try Clever Invoice free and create your first E-invoice in minutes. XRechnung, ZUGFeRD - everything automatically in the right format.