GST Billing System with PDF Invoice Generator
A Django-based GST billing web app that automates tax calculations and generates professional PDF invoices for Indian businesses.
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Available for paid custom modifications such as additional invoice formats, multi-user roles, payment gateway integration, or UI customization. Contact via chat...
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BillFlow is a production-ready GST-compliant
invoicing system built with Django 4.2. It automatically calculates CGST+SGST for intra-state and IGST for inter-state transactions across all GST slabs (0%, 5%, 12%, 18%, 28%).
Key Highlights:
• Auto-numbered PDF invoices with company branding
• Dynamic line items with real-time total preview
• Complete invoice lifecycle management
(Draft → Sent → Paid → Cancelled)
• Customer and product database with full CRUD
• Monthly GST summary report for tax filing
• One-click CSV export of all invoice records
• Search and filter by invoice number, customer,
date range, and payment status
• Secure login/logout with session management
• Full Django admin panel for data management
Tech Stack:
Backend — Django 4.2, Python
Database — SQLite
PDF Engine — ReportLab, xhtml2pdf
Frontend — Bootstrap 5.3, HTML, CSS
Ideal for small businesses, freelancers, and
students learning real-world Django development.
Future Enhancements
- Future Enhancements
- Online payment integration
- Email invoice delivery
- Barcode/QR code support
- Inventory and stock management
- Sales analytics dashboard
- Role-based user authentication
- Cloud deployment with Docker
- Mobile-responsive improvements
- These sections are suitable for a Django GST Billing System project and can be used directly in your project documentation or submission.
Known Issues
- Email notifications are not implemented.
- SQLite is intended for development; PostgreSQL or MySQL is recommended for production.
- PDF invoice generation can be enhanced.
Installation
- Prerequisites
- Python 3.10 or later
- Git
- pip (Python package manager)
- Steps
- Clone the repository:
- git clone https://github.com/Sathvika14-chava/gst_billing.git
- cd gst_billing
- Create a virtual environment:
- python -m venv venv
- Activate the virtual environment:
- Windows:
- venv\Scripts\activate
- Linux/macOS:
- source venv/bin/activate
- Install the required packages:
- pip install -r requirements.txt
- Apply database migrations:
- python manage.py migrate
- Start the development server:
- python manage.py runserver
- Open your browser and visit:
- http://127.0.0.1:8000/
Usage
- Log in to the application.
- View the Dashboard for business insights.
- Add and manage customer details.
- Add products with GST rates and prices.
- Create GST invoices with automatic tax calculations.
- View invoice history and GST reports.
- Export reports to CSV when required.
- Manage billing records efficiently through the web interface
System Requirements
- Operating System
- Windows 10/11
- Ubuntu 20.04 or later
- macOS
- Software
- Python 3.10+
- Django
- SQLite
- Git
Hardware
- RAM: 4 GB minimum (8 GB recommended)
- Storage: 500 MB free disk space
- Internet connection (for cloning the repository and installing dependencies)
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