German freelancers face two challenges in 2026: finding free invoicing software and preparing for the E-Rechnungspflicht (mandatory e-invoicing from 2027 for B2B).
The E-Rechnungspflicht: The Deadline You Cannot Ignore
Since January 2025, all businesses in Germany must be able to receive B2B e-invoices in structured formats (ZUGFeRD or XRechnung). From 2027, sending such invoices becomes mandatory too.
Most freelancers are not prepared.
The Only Truly Free Option: Papierkram
Papierkram is the only German invoicing tool with a genuinely unlimited free tier for one person. German servers, GDPR-compliant, no time limit. ZUGFeRD support requires a paid plan.
AI-Assisted Invoicing: lexoffice and sevDesk
Both lexoffice (7.90 EUR/month) and sevDesk (8.90 EUR/month) include AI receipt scanning and ZUGFeRD support. Both offer DATEV integration for tax advisors. 14-day free trials available.
ChatGPT: Useful for Text, Not for Structured Files
ChatGPT drafts invoice cover letters and payment reminders well. It cannot generate ZUGFeRD or XRechnung files and cannot track invoice numbers.
My Recommendation
- Occasional invoices, tight budget: Papierkram Free
- Regular volume with DATEV advisor: lexoffice 7.90 EUR or sevDesk 8.90 EUR
- Text drafts only: ChatGPT Free
Full German comparison with E-Rechnung step-by-step workflow: KI Rechnungsstellung kostenlos 2026
Tested June 2026. All prices EUR/month.
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