Invoicing & Accounting Guide
Practical articles on e-invoicing, taxes, and financial management for freelancers and companies.
IT Freelancer Invoice in Germany: Requirements & Abroad
How IT freelancers write German invoices: mandatory details, hourly rates and milestones, EU and non-EU clients, and e-invoicing from 2027.
GoBD-Compliant Invoice Archiving: 2026 Guide
How do you archive invoices in a GoBD-compliant way? Retention periods, the key principles - and why no official "GoBD certificate" exists.
How to Write an Invoice in Germany: A Beginner Guide
Step-by-step guide for freelancers and the self-employed: how to start invoicing in Germany in 2026 - from tax registration to your first e-invoice.
Writing an Invoice as a Private Individual: When Is It Required?
Do private individuals have to write an invoice? When a receipt is enough, when you become a business — and what applies to tradesperson invoices.
Calculating Skonto: Formula, Example & Effective Annual Rate
How to calculate Skonto (early-payment discount) correctly: formula for the discount amount and effective annual rate, plus an example and when Skonto is worth it.
How to Write a Correct Invoice in Germany: Mandatory Fields
Which mandatory fields belong on a B2B invoice in Germany? Avoid mistakes, protect your VAT deduction, and get ready for e-invoicing in 2026.
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.