About the guide
Charles Imilkowski
Software developer · PepperTools
Charles Imilkowski has been developing and selling his own software for invoicing and accounting since 2014, through his company PepperTools. He has also worked as a software developer since 2004, today for medium-sized companies, building interfaces between ERP systems such as SAP and accounting solutions such as DATEV.
The topics in this guide come from the questions users ask in support. He checks every rule against the official source before it appears in an article.
- Contact
- info@peppertools.de
Latest articles
Invoicing & Accounting
Instalment agreement with customers: template and rules
Your customer asks whether they can pay the invoice in three instalments. Before you agree, two things matter: the tax office will not wait, and your favour legally becomes a loan.
Invoicing & Accounting
Cash Discount on an Invoice: Wording, Deadline and VAT
A client deducts a cash discount even though they paid far too late – and looking at your invoice, you realise your wording never settled the point.
Invoicing & Accounting
Invoicing Without a Trade License in Germany: Allowed, With a Limit
A client wants an invoice, but you haven't registered a trade. You may still write one – the real question is when a favor turns into an obligation.
Invoicing & Accounting
Payment terms on an invoice: wording, deadlines, default
How long may your customer take, what do you put on the invoice, and when may you send a reminder? The answers, with wording you can copy.
Invoicing & Accounting
Invoice numbers in Germany: gaps, duplicates and examples
A duplicate invoice number costs you neither your bookkeeping nor your customer's input VAT deduction – provided you correct it properly. This article shows how.