Generic Billing System

A comprehensive desktop billing and inventory management system built with Python and Tkinter. This system provides a complete solution for small to medium businesses to manage their sales, inventory, customers, suppliers, and financial records.

Features

• User Authentication: Secure login system with role-based access control
• Inventory Management: Track products, stock levels, and reorder points
• Sales Management: Create invoices, track payments, and manage customer credits
• Customer Management: Maintain customer database with credit tracking
• Supplier Management: Track suppliers and purchase orders
• Financial Reports: Generate comprehensive reports for business insights
• Receipt Management: Handle customer payments and refunds
• Settings & Configuration: Customizable shop information and system preferences

Screenshots

Installation

Prerequisites

• Python 3.7 or higher
• pip (Python package installer)

Quick Start

1. Clone the repository

   git clone https://github.com/AbhinavSudhi/billing-system.git
   cd billing-system

2. Install dependencies

   pip install -r requirements.txt

3. Initialize the database

   python db_init.py

4. Create admin user

   python create_admin.py

5. Launch the application

   • Windows: Double-click launch_billing_system.bat
   • macOS: Double-click launch_billing_system.py

Usage

First Time Setup

1. Run the application
2. Login with your admin credentials
3. Go to Settings → Shop Information
4. Configure your shop name, address, and other details
5. Customize system preferences as needed

Daily Operations

• Sales: Create invoices, process payments, track credits
• Inventory: Monitor stock levels, add new products
• Reports: Generate daily/weekly/monthly reports
• Customers: Manage customer database and credit accounts

Configuration

The system is highly configurable through the Settings tab:

• Shop Information: Name, address, contact details
• System Preferences: Currency, tax rates, backup settings
• User Management: Add/remove users, assign roles
• Database: Backup, export, and maintenance tools

File Structure

billing-system/
├── models/          # Data models and database operations
├── ui/             # User interface components
├── main.py         # Main application entry point
├── db_init.py      # Database initialization
├── create_admin.py # Admin user creation
└── requirements.txt # Python dependencies

Contributing

We welcome contributions! Please see our Contributing Guide for details.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Support

For support and questions:

• Create an issue on GitHub
• Check the documentation
• Review the setup instructions

Roadmap

• Multi-language support
• Cloud backup integration
• Mobile app companion
• Advanced analytics
• API for third-party integrations

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Note: This is a generic billing system that can be customized for any business. The shop name and branding can be configured through the settings interface.