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.
EÜR for Kleinunternehmer 2026: Process, Requirement & Template
Do Kleinunternehmer have to file an EÜR (income statement)? Process, deadlines, mandatory details, and how it differs from the Kleinunternehmer threshold.
DATEV EXTF 700 Explained: How to Cut Tax Advisor Costs
What is the DATEV EXTF 700 format and how does it help freelancers and self-employed people in Germany reduce their tax advisor costs? A practical guide.
Cancellation Invoices (Stornorechnung): How to Fix Errors
Made a mistake on an invoice? Learn how to legally issue a Stornorechnung in Germany under GoBD rules and cancel E-Invoices in 2026.
Invoice Numbering Rules in Germany (GoBD & UStG)
How to structure your invoice numbers correctly in Germany. Avoid GoBD violations, missing gaps, and ensure E-Invoicing compliance in 2026.
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.
Successful Payment Reminders (Mahnung): B2B Tips & Templates
How to write a Mahnung in Germany. Learn about the dunning process, B2B late fees (40-Euro Verzugspauschale), and how to automate it in 2026.
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.