Germany E-Invoice Mandate 2027/2028: Timeline, €800k Threshold, and Format Rules

Article overview

This article explains Germany E-Invoice Mandate 2027/2028: Timeline, €800k Threshold, and Format Rules as a practical reference for European e-invoicing. It defines the topic in plain language, places it in the compliance context, and connects the explanation to invoice formats such as XRechnung, ZUGFeRD/Factur-X, UBL, and CII.

Germany's B2B E-Invoice Mandate: Timeline, Thresholds, and Compliant Formats

Germany is introducing mandatory B2B e-invoicing in stages. Domestic business-to-business transactions are moving to structured formats that meet the European EN 16931 standard, with statutory transition periods. This guide covers the reception requirement from 2025, the €800,000 turnover threshold for 2027, and the broader issuance requirement from 2028.

The Growth Opportunities Act (Wachstumschancengesetz)

Germany's B2B e-invoicing rules were introduced through the Wachstumschancengesetz (Growth Opportunities Act) and implemented in the German VAT Act. For invoice teams, domestic B2B invoicing is moving from paper or plain PDF toward structured data that meets the statutory e-invoice definition.

Detailed Timeline Breakdown

Phase 1: Reception Capability (January 1, 2025) - Active

Since January 1, 2025, domestic businesses must be able to receive e-invoices. An email inbox is sufficient for receipt, although the invoice itself must meet the statutory requirements. XRechnung and compliant ZUGFeRD/Factur-X are common EN 16931-based examples.

Phase 2: Large Business Issuance Mandate (January 1, 2027)

From January 1, 2027, issuers whose total turnover in 2026 exceeded €800,000 must generally issue e-invoices for domestic B2B transactions. The statutory transition does not extend the option to use paper or plain PDF invoices for these issuers, unless another exception applies.

Phase 3: Universal Issuance Mandate (January 1, 2028)

From January 1, 2028, the remaining transition period expires. E-invoicing becomes the general rule for domestic B2B issuers, subject to statutory exceptions. Kleinunternehmer are exempt from the obligation to issue e-invoices, but they must still be able to receive them.

2027 Threshold Audit & Quarterly Action Plan

Under § 27 Abs. 38 UStG, the €800,000 threshold is based on the issuer's total turnover (Gesamtumsatz) in the preceding calendar year (2026). In an Organschaft, the turnover of the entire VAT group is relevant.

Accepted E-Invoice Formats in Germany

Format	Type	Best For
XRechnung	Pure XML	B2G, automated processing
ZUGFeRD 2.x	Hybrid PDF/XML	B2B, visual PDF + machine-readable XML
Factur-X	Hybrid PDF/XML	Cross-border workflows; same hybrid standard family

Note: Plain PDF emails without embedded XML are NOT compliant e-invoices.

Exceptions and Special Rules

Kleinunternehmer are exempt from issuing e-invoices, but they still need to be able to receive them. Other statutory exceptions include certain small-value invoices and specific exempt transactions. These exceptions are separate from the transition rules.

How to use this guide

Use the article as a starting point before changing a finance or ERP workflow: identify the applicable country rule or standard, decide which structured format is expected, validate the generated XML, and keep a documented exception process for invoices that require manual review.