gnubok

Open-source Swedish accounting software for sole traders (enskild firma) and limited companies (aktiebolag).

What is gnubok?

gnubok implements double-entry bookkeeping compliant with Swedish accounting law (Bokforingslagen). It supports the BAS 2026 chart of accounts, handles VAT declarations (momsdeklaration), SIE import/export, and enforces 7-year document retention. Built for sole traders and limited companies operating in Sweden.

Features

• Double-entry bookkeeping -- BAS 2026 chart of accounts, draft/commit workflow, sequential voucher numbering
• Invoicing -- Create, send, and track invoices with mixed VAT rates and PDF generation
• Bank reconciliation -- PSD2 bank connection via Enable Banking, 4-pass automatic matching
• VAT declaration -- SKV 4700 form mapping, per-rate breakdown, EU/export handling
• Tax reports -- NE-bilaga, INK2, SRU export for Skatteverket
• Supplier invoices -- Registration, payment tracking, input VAT deduction
• Document archive -- SHA-256 integrity, 7-year retention enforcement, full archive ZIP export
• SIE import/export -- Standard Swedish accounting interchange format
• Extension system -- Opt-in plugins for AI categorization, receipt OCR, email, calendar, and more

Self-Hosting

git clone https://github.com/erp-mafia/gnubok.git
cd gnubok
./setup.sh              # Prompts for Supabase credentials, generates .env
docker compose up -d

You need a Supabase project and must apply the database migrations before first use. See SELF-HOSTING.md for the full step-by-step guide, including Supabase setup, auth configuration, optional features (AI, email, push notifications), and troubleshooting.

Development Setup

Prerequisites: Node.js 20+, a Supabase project.

npm install
npm run dev       # Start dev server (auto-generates extension registry)
npm test          # Run tests
npm run build     # Production build
npm run lint      # ESLint

Tech Stack

• Framework: Next.js 16 (App Router), React 19, TypeScript (strict)
• Database: Supabase (PostgreSQL + Row Level Security + email/password auth + TOTP MFA)
• Styling: Tailwind CSS 4 + shadcn/ui
• Integrations: Enable Banking (PSD2), Anthropic SDK, LangChain, OpenAI, Resend, JSZip

Documentation

• SELF-HOSTING.md -- Full self-hosting guide (Docker, Supabase setup, migrations, optional features)
• CLAUDE.md -- Architecture, bookkeeping engine, database conventions, extension system
• CONTRIBUTING.md -- Development workflow, code style, pull request process
• SECURITY.md -- Vulnerability reporting policy

Contributing

Contributions are welcome. See CONTRIBUTING.md for the full guide.

All commits require a DCO sign-off (git commit -s).

License

AGPL-3.0-or-later with an extension exception: third-party extensions that interact solely through the documented Extension API may be licensed under any terms, including proprietary. See LICENSE for details and NOTICE for third-party attributions.