E-invoicing guides

Deadlines, formats and practice — without legalese.

Germany's E-Invoicing Mandate: A Practical Guide for Foreign Businesses

Selling to German companies? From 2025–2028 Germany phases in mandatory structured e-invoices (XRechnung/ZUGFeRD). What foreign suppliers and freelancers need to know.

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XRechnung & ZUGFeRD for Developers: EN 16931 Without the Pain

How German e-invoices work under the hood: EN 16931 semantics, CII vs UBL syntax, XSD vs Schematron validation, rounding rules, and the mistakes that fail KoSIT.

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Artikel auf Deutsch