Deutsches Finanz- & Buchhaltungs-Plugin für Claude Cowork — Kostenlos
Give Claude Cowork deep German accounting knowledge — HGB, SKR 03/04, USt, GoBD, eBilanz, and month-end close. Drag-and-drop install, structured output, regulation-aware workflows.
🏗️ Built on the architecture of Anthropic's official Finance & Accounting Plugin — fully localised for German regulations, accounting standards (HGB/SKR 03/04), and compliance requirements (GoBD). Designed for accuracy: the plugin cites only HGB standards, USt guidance, and GoBD requirements from its verified knowledge base — no fabricated references.
How It Works
- 1Install — download the plugin zip and upload it in the Claude Desktop App
- 2Choose your workflow — Buchungssätze, USt-Voranmeldung, Jahresabschluss, and more
- 3Provide your data — paste, upload, or connect via built-in MCP integrations (Slack, BigQuery, Microsoft 365, Gmail, and Google Calendar included out of the box)
- 4Get structured output — HGB-compliant, GoBD-aware results ready for review
Get the Guide File
Enter your email to download finance-de-cowork-plugin.zip and get access to the GitHub repository.
No spam, ever. Your email is stored securely so we can send you updates about new use cases and workflows.
Step-by-Step: Install the Plugin in the Claude Desktop App
Download the plugin zip
Enter your email in the form above to download the plugin zip file.
Open Customize in the Claude Desktop App
Open the Claude Desktop App. Click Customize in the bottom-left corner.
Select Upload plugin
Under Personal plugins, click the + button, then select Upload plugin.
Upload the zip file
Drag and drop the downloaded zip file into the upload area, or click Browse files. Then click Upload.
Run your first accounting command
Try /buchungssatz, /jahresabschluss, or /ust-voranmeldung to see the plugin in action.
Connect your accounting tools (optional)
The plugin includes 5 Anthropic-hosted MCP servers (Slack, BigQuery, Microsoft 365, Gmail, and Google Calendar) that work out of the box. You can also connect DATEV, Lexware, or sevDesk for additional integrations.
Review outputs with your Steuerberater
All plugin output should be reviewed by a qualified professional before acting on it.
Why Manual German Accounting in Claude Is Painful
You paste financial data into Claude and get generic responses. It doesn't know HGB from IFRS, can't structure a proper USt-Voranmeldung, and has no idea about Finanzamt filing deadlines. This plugin gives Claude deep German accounting knowledge — so it works like a qualified Steuerberater assistant, not a general chatbot.
Without the Plugin
- ✗Generic responses — Claude doesn't know German accounting standards
- ✗No USt structure — can't prepare a proper ELSTER submission
- ✗Missing deadlines — no awareness of Finanzamt/Handelsregister filing dates
- ✗Manual formatting — you have to structure everything yourself
With the Plugin
- ✓HGB-aware — knows SKR 03/04 chart of accounts and GoBD requirements
- ✓ELSTER-ready — structured USt-Voranmeldung with Vorsteuerabzug handling
- ✓Deadline tracking — USt, Lohnsteuer, eBilanz with penalty schedules
- ✓Structured output — Buchungssätze, Jahresabschluss, and Abstimmungen in proper format
What It Handles
The plugin gives Claude Cowork specialist knowledge across six core German accounting domains — turning it from a generic assistant into a regulation-aware finance tool for your team.
Buchungssatz Automation
Abgrenzungen, Rückstellungen, Lohnbuchhaltung (Sozialversicherung, betriebliche Altersvorsorge), and Anlagevermögen with HGB treatment.
Jahresabschluss
GuV (Gesamtkostenverfahren/Umsatzkostenverfahren), Bilanz, Kapitalflussrechnung, with period comparison and HGB formatting.
Kontenabstimmung
Hauptbuch-zu-Nebenbuch matching, DATEV integration, SEPA/Lastschrift reconciliation.
USt & ELSTER Compliance
USt-Voranmeldung preparation, Vorsteuerabzug, Innergemeinschaftliche Lieferungen, ELSTER filing.
Handelsregister & eBilanz
eBilanz preparation, Handelsregister filings, Unternehmensgrößenklassen, and Offenlegungspflichten.
Internal Controls & GoBD
GoBD compliance testing, Verfahrensdokumentation, audit trail requirements, IDW PS alignment.
How the Plugin Works
The plugin extends Claude Cowork with structured German accounting workflows. Each command follows a consistent pattern: provide your data, get regulation-compliant output, review with a qualified professional.
Install the Plugin
Drag and drop the plugin into your Claude Cowork project. No terminal commands needed — it works immediately after install.
Choose Your Workflow
Use /buchungssatz, /abstimmung, /ust-voranmeldung, /jahresabschluss, or /ebilanz to select the accounting task.
Provide Your Financial Data
Paste figures directly, upload a spreadsheet, or connect via the built-in MCP integrations (Slack, BigQuery, Microsoft 365, Gmail, and Google Calendar included). DATEV, Lexware, and sevDesk are also supported.
Get Structured, HGB-Compliant Output
The plugin ensures all output follows German accounting standards — HGB, SKR 03/04, GoBD requirements. No generic responses.
Connect Your Tools (Optional)
5 Anthropic-hosted MCP servers (Slack, BigQuery, Microsoft 365, Gmail, and Google Calendar) work out of the box. You can also connect DATEV, Lexware, sevDesk, or ELSTER for additional data sources.
Review and Action
All outputs are designed for review by qualified professionals. The plugin accelerates your workflow — it doesn't replace professional judgement.
Best For — and Not For
Best For
- German GmbH, GbR, Einzelunternehmen, and Freiberufler using Claude Cowork for bookkeeping
- Steuerberater and Buchhalter who want Claude as a workflow accelerator
- Businesses preparing USt-Voranmeldungen and eBilanz filings
- Finance teams needing faster Monatsabschluss
Not the Right Fit
- —Replacement for qualified Steuerberater — this is an assistant, not an adviser
- —UK/US-only businesses with no German accounting needs
- —Enterprise-scale ERP workflows (use dedicated accounting software)
- —Automated filing without human review
Frequently Asked Questions
It's a free, open-source plugin that gives Claude Cowork deep knowledge of German accounting standards, regulations, and workflows. It covers Buchungssätze, Jahresabschluss, USt-Voranmeldung, eBilanz, Lohnabrechnung, and GoBD compliance — all built for HGB and Finanzamt requirements.
Download the quickstart file above and follow the step-by-step guide. Installation is drag-and-drop in your Claude Cowork project — no terminal commands required.
Yes. The plugin includes a dedicated /ust-voranmeldung workflow that prepares your USt submission. It handles Vorsteuerabzug, innergemeinschaftliche Lieferungen, steuerfreie Umsätze, and Kleinunternehmerregelung. For ELSTER filing, it prepares Finanzamt-compliant submissions.
Yes. The Germany Finance & Accounting Plugin is free for private and internal business use under the Apache 2.0 + Commons Clause licence. The source code is available on GitHub. Commercial resale is not permitted.
The plugin includes 5 Anthropic-hosted MCP servers that work out of the box: Slack, BigQuery, Microsoft 365, Gmail, and Google Calendar. You can also set up MCP connections to DATEV, Lexware, sevDesk, and other accounting tools for live data access.
The plugin is built around HGB (Handelsgesetzbuch) with SKR 03 and SKR 04 chart of accounts support. It knows the correct treatment for Rückstellungen, Abgrenzungen, Abschreibungen, Sozialversicherung, betriebliche Altersvorsorge, and GoBD-compliant Verfahrensdokumentation.
Yes. The plugin includes Monatsabschluss workflows covering Buchungssatz preparation, Kontenabstimmung, Abweichungsanalyse, and Jahresabschluss generation. It follows a structured close calendar approach with checklists for each stage.
The plugin prepares eBilanz submissions in the required XBRL taxonomy, handles Unternehmensgrößenklassen classification, determines Offenlegungspflichten, and tracks filing deadlines with the Handelsregister and Finanzamt.
Download the Free Plugin
Get the quickstart guide and start using German-compliant accounting workflows in Claude Cowork today. Free, open source, and built for German businesses.
Need Help Setting This Up For Your Business?
We help German businesses get Claude working as a genuine finance workflow tool — not just a chatbot. Custom plugin configuration, MCP server connections, and workflow design.