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Guide & Tips

Invoicing & Accounting Guide

Practical articles on e-invoicing, taxes, and financial management for freelancers and companies.

Topic:#VATClear filter
Invoicing as a Photographer: Usage Rights & E-Invoicing Mandate
#Photographer3 min read

Invoicing as a Photographer: Usage Rights & E-Invoicing Mandate

How to write legally compliant invoices as a photographer. Everything about usage rights (7% vs 19% VAT) and the new 2025 e-invoicing mandate.

Redaktion Solobuch

Aug 27, 2026

Reverse Charge Mechanism Explained: B2B Rules & E-Invoicing
#Reverse Charge5 min read

Reverse Charge Mechanism Explained: B2B Rules & E-Invoicing

What is the Reverse Charge mechanism in Germany & the EU? Rules for 2026, required invoice statements, VAT IDs, and XML codes for E-Rechnung.

Redaktion Solobuch

Aug 6, 2026

Invoicing as a Kleinunternehmer in Germany (§ 19 UStG)
#Kleinunternehmer4 min read

Invoicing as a Kleinunternehmer in Germany (§ 19 UStG)

How to correctly issue invoices without VAT as a small business (Kleinunternehmer) in Germany. Includes mandatory requirements and the 2025 e-invoicing mandate.

Redaktion Solobuch

Jul 13, 2026