Product

Invoice Portal

Professional invoices. Multi-company. PDF export.

The TWT Invoice Portal enables businesses to create and manage professional invoices through a modern web interface. Each company workspace has its own templates, custom fields, customer database, product catalog, and numbering rules. Invoices are generated as branded A4 PDFs with full German tax law compliance (§19 UStG). Built with Go/Gin backend and Nuxt 4 frontend.

Open Portal

Features

  • Multi-company workspaces with role-based access
  • Custom invoice templates with drag-and-drop field builder
  • Professional A4 PDF generation with company branding
  • Auto-incrementing invoice numbering with yearly/monthly reset
  • Customer and product database per company
  • German tax law compliance (§19 UStG Kleinunternehmer)
  • Dark mode and bilingual interface (DE/EN).

Use Cases

  • Freelancer and small business invoicing
  • Automotive service workshops
  • Consulting firms
  • Multi-company invoice management.

A multi-tenant invoice management portal for creating, managing, and exporting professional PDF invoices with custom templates, field builders, and company branding.

Open Invoice Portal now