E-invoicing 2026: Why real digitization is only just beginning now - and how companies are leveraging its full potential
Introduction: Digitization or just new packaging?
Since January 1, 2025, the e-invoicing obligation for the B2B sector has been in force in Germany (§ 14 UStG). With 2026 as the decisive transition year and the next mandatory phase from 2027 for companies with an annual turnover of over 800,000 euros, the pressure is increasing. However, many companies experience the opposite of efficiency in their everyday lives: new complexity, more validation errors and an increased need for coordination with suppliers and customers.
The impression is that PDF and paper formats have been converted to XML - but the process behind them has hardly changed. This is the real problem of digital transformation in accounting.
E-invoicing obligation 2026/2027: What applies to your company now?
The statutory transitional periods are clearly defined:
• From 01.01.2025: All companies must be able to receive e-invoices.
• 2025–2026: PDF invoices will remain permissible during the transition period (with the consent of the recipient).
• From 01.01.2027: Obligation to issue e-invoices for companies with an annual turnover of more than 800,000 euros (previous year 2026).
• From 01.01.2028: Complete conversion obligation for all domestic B2B companies – PDF without XML data will then no longer be valid.
2026 is thus the final trial year. Tax offices are moving from the implementation to the verification phase. Companies that have not implemented their internal control system (ICS) by then risk tax disadvantages and fines of up to 5,000 euros per violation (§ 26a UStG).
Why e-invoicing is not yet really digitized
Whether XRechnung, ZUGFeRD or Peppol BIS Billing 3.0: Technically, the formats are clearly specified. The challenges arise above all where:
• Order reference is missing or is only optionally specified
• Mandatory fields can be interpreted differently
• Validation rules only check technical correctness, but not functional correctness
• ERP systems, special cases and variants from the paper world continue to follow suit
• Processes have grown historically and are inconsistent
This means that e-invoicing often remains a digital document - but not an automated process. The difference is crucial for competitiveness.
XRechnung vs. ZUGFeRD vs. Peppol: Which format is the right one?
PDF invoices enabled creative variants – from individual position texts to free texts for complex cases. Structured e-invoice formats, on the other hand, require clear structures, unambiguous fields, defined business terms and consistent data. Here is an overview:
• XRechnung: Pure XML format, standard for public clients (B2G), fully machine-readable.
• ZUGFeRD (version 2.0 or later): Hybrid format – combines readable PDF with embedded XML. Ideal for the transition in the B2B sector.
• Peppol BIS Billing 3.0: Europe-wide network format, increasingly relevant for cross-border B2B transactions within the framework of ViDA.
Anyone who tries to transfer old processes 1:1 into new formats inevitably creates additional work and loses exactly the efficiency that structured formats are supposed to bring.
The key: End-to-end automation in the order-to-cash process
True automation is not based on the invoice format, but on the entire process chain -the complete order-to-cash cycle:
1. Ordering: Standardized, digital, system-supported - with a clear order reference.
2. Invoice: Logical and technically clear as a direct result of the order - with automatic three-way reconciliation.
3. Payment: Automatically assignable through consistent references and digital payment approval.
Companies that have closed this chain report measurable results:
• Up to 80% less manual intervention in invoice processing
• Higher data quality and lower error rates
• Faster processing times and early receipt of payments (sometimes 4+ days faster)
• Significantly lower process costs per document
PDF on e-invoicing: The pragmatic entry without a system change
Not all companies can immediately restructure the entire process chain – and that's not a mistake. The additional effort that many companies feel is the necessary intermediate step on the way to true digitalization.
Smart transitional solutions such as those from pedif.digital help to gradually transfer existing PDF-based processes into structured electronic formats - without immediate system changeover:
• PDF to e-invoice: Automatic conversion of your PDF invoices to XRechnung or ZUGFeRD for outgoing invoices → pedif.digital/en/services/pdf-to-e-invoice
• PDF to e-order: Automatic processing of incoming PDF orders as machine-readable e-orders in the ERP system → pedif.digital/en/services/pdf-to-e-order
These AI-supported converter services make it possible to integrate legacy systems and connect partners who are not yet working fully digitally - without media disruption and without process conversion at the customer or supplier.
5 concrete steps to e-invoicing 2026/2027 – checklist for companies
1. Standardize processes before digitizing them: Inconsistent data remains inconsistent in XML as well. First, clean up master data and processes.
2. Introduce mandatory technical fields, not just technical ones: An order reference must be technically mandatory – not just optionally configured in the ERP.
3. Establish end-to-end ownership: Who is responsible for acceptance rate, clarification time and data quality? Create clear responsibilities.
4. Actively involve specialist departments: E-invoicing affects purchasing, accounting, IT and finance - not just the ERP team.
5. Use transitional solutions to take all partners with you: Converter services convert PDF workflows step by step into structured formats – without media discontinuity.
Conclusion: E-invoicing is the beginning – not the goal
The e-invoicing obligation in 2025 is the first step. The real challenge is complete process automation by 2027/2028.
• Stable, end-to-end process chains in the order-to-cash sector
• Significant efficiency gains and lower process costs
• Better liquidity through earlier incoming payments
• GoBD-compliant, audit-proof processes for tax audits from 2026
• Full compatibility with the EU initiative ViDA (VAT in the Digital Age)
For all those who want to start pragmatically and still scale in a structured way: The automatic conversion of PDF invoices and PDF orders into e-invoices or e-orders from pedif.digital offers the ideal bridge for getting started with complete process digitization.