E-Invoicing
Outgoing Invoice
Definition
An outgoing invoice is an invoice that a company issues to a customer. From certain transitional deadlines (depending on company size, by 2028 at the latest), domestic outgoing invoices in the B2B sector in Germany must be issued as structured e-invoices. For B2G outgoing invoices to federal authorities, this obligation has applied since 2020.
Switch to German:Ausgangsrechnung (DE)
Related terms
E-InvoiceAn e-invoice in the strict sense is an invoice that is issued and received in a structured, machine-readable format and enables automatic electronic processing. In the German context, particularly following the Growth Opportunities Act, e-invoice explicitly refers to structured formats (XRechnung, ZUGFeRD/Factur-X, Peppol BIS), while pure PDF invoices no longer qualify. Hybrid formats such as ZUGFeRD count as e-invoices because they contain the XML structured data.B2B (Business-to-Business)B2B refers to business relationships and invoicing between two companies. In Germany, the Growth Opportunities Act (2024) introduced a mandatory electronic invoicing obligation for domestic B2B transactions as well. From 2025, businesses must be capable of receiving e-invoices; the obligation to issue them will be phased in until 2028. ZUGFeRD and XRechnung are both permitted formats for B2B.B2G (Business-to-Government)B2G refers to business relationships and invoicing from companies to government entities (federal, state, municipal, and public bodies). In Germany, electronic invoicing in the B2G sector has been progressively mandatory for federal authorities since 2020 and increasingly for state and municipal authorities. The required format is XRechnung or another EN 16931-compliant format.XRechnungXRechnung is the German standard for structured electronic invoices in public sector procurement (B2G). It is based on the European standard EN 16931 and is available in two syntaxes: UBL 2.1 and UN/CEFACT CII. Since 27 November 2020, federal public buyers have been required to accept electronic invoices in XRechnung format, and state and municipal authorities have been progressively included.ZUGFeRDZUGFeRD (Zentraler User Guide des Forums elektronische Rechnung Deutschland) is a hybrid invoice format that combines a human-readable PDF/A-3 file with embedded machine-readable XML data. The format is maintained by the Forum elektronische Rechnung Deutschland (FeRD) and exists in several profiles (MINIMUM, BASIC, EN 16931, EXTENDED). It is technically identical to the European Factur-X standard.Growth Opportunities ActThe Growth Opportunities Act (officially: Gesetz zur Stärkung von Wachstumschancen, Investitionen und Innovation sowie Steuervereinfachung und Steuerfairness) was passed in March 2024 and regulates, among other things, the phased introduction of mandatory electronic invoicing in the B2B sector in Germany. From 2025, all domestic B2B invoices must be issued in a structured format and businesses must be capable of receiving them; transitional exemptions apply on a staggered basis until 2028.