KleinBooks – German Invoicing & Buchhaltung Wordpress Plugin - Rating, Reviews, Demo & Download
Plugin Description
KleinBooks brings the German business workflow — Angebot Rechnung (quote invoice) — directly into your own WordPress admin. No second tool, no monthly SaaS subscription. It is built for Kleinunternehmer and small businesses who already run their site on WordPress.
Free
- Write quotes/offers (Angebote) and convert them to an invoice in one click
- Create invoices with the correct German mandatory fields (§14 UStG basics)
- Generate clean PDF invoices & quotes (DomPDF) and send them by email
- Manage your clients and customers
- Log business expenses
- A simple dashboard with a revenue overview
Pro
Upgrade the day you need to be audit-ready and mandate-ready:
- ZUGFeRD / Factur-X e-invoicing — get ready for the 2027/2028 German e-invoice mandate
- DATEV export (EXTF 700, SKR03/SKR04) for your tax advisor
- GoBD compliance lock — tamper-proof, immutable invoices with proper Storno (cancellation)
- AfA / Abschreibung — depreciation tracking
KleinBooks Free is an invoicing tool. Compliance features (GoBD lock, DATEV export, e-invoicing) are part of KleinBooks Pro.
Source code
The admin app is built with React (@wordpress/scripts). The full unminified source for the compiled bundle in assets/, together with build instructions, is included in the plugin’s src/ directory.
Screenshots
Dashboard: revenue, open invoices, expenses and your Kleinunternehmer limit at a glance.
Invoices with automatic sequential numbers, status, due date and payment tracking.
Clean invoice PDF with the §19 UStG notice, ready to send by email.
Quotes (Angebote) that turn into an invoice in one click.
Expenses by category, including recurring subscriptions.
Taxes: profit, tax reserve estimate and the §19 UStG thresholds.
