Express Invoice - The Complete Billing Software

Express Invoice & Stock Manager – Billing, Inventory & Accounts Management

Update: A major Slim Framework enhancement update 2026, focusing on further performance optimizations, internal improvements, and long-term stability.

Now rebuilt with Slim PHP Framework

Express Invoice & Stock Manager is a lightweight, high-performance billing and inventory management application designed for small and medium-sized businesses. After a long time, the application has been fully modernized and migrated from raw PHP to the Slim PHP Framework, ensuring better code structure, improved security, and long-term maintainability — without changing the existing user interface.

What’s New in This Update

• Migrated from Raw PHP to Slim PHP Framework
• Cleaner MVC-style architecture and routing
• Improved security and code organization
• Better scalability for future updates
• No UI changes – familiar workflow retained

Note: This application is designed for English language only. Multi-language and multi-currency are not included in this version.

Billing & Invoicing Features

• Create Invoices, Quotes, and Purchase Receipts
• Invoice statuses: Paid, Due, Pending, Cancelled
• Per-item tax percentage support
• Payment methods: Cash, Bank Transfer, PayPal, Card
• Partial payments and payment reminders
• Link sales entries to bank accounts

Income & Expense Management (Manual)

• Manual income and expense tracking
• Monthly income and expense summaries
• Set monthly targets for sales, income, and expenses
• Manage multiple bank accounts in one place

Reports & Business Insights

• Daily, weekly, monthly, and yearly sales tracking
• Customer-wise purchase reports
• Employee sales performance reports
• Fast report generation with optimized queries

Note: Excel export is not included in this version.

Customization Options

• Custom currency symbol
• Multiple date and number formats
• Custom timezone configuration
• Invoice footer notes and billing terms
• Invoice prefix configuration

Highlights

• Advanced stock management with alerts
• Printer-friendly invoice layout
• Invoice, Quote, and Receipt shortcuts
• Employee role management (Owner, Manager, Sales)
• Easy payment gateway integration
• Add internal notes for records

Why Choose This Software?

Most invoicing and inventory systems become slow after long-term usage. Express Invoice & Stock Manager is built to handle unlimited transactions without performance issues. It is extremely lightweight, resource-friendly, and optimized for low-powered servers.

• Fast and responsive even on shared hosting
• Low memory and CPU usage
• Clean database structure
• Stable for long-term business use

Additional Features

• Easy to use – learn in under 15 minutes
• Works for registered and walk-in customers
• Automatic stock adjustment on invoices
• Low stock alerts on dashboard
• Monthly targets for sales and expenses
• Email and SMS integration ready
• Employee access control
• Database backup and restore
• Company branding with logo

Installation

Easy 3-step installation. No programming knowledge required.

Live Demo

https://express.ultimatekode.com/

Admin Login Username: admin Password: 123456

Manager Login (Restricted) Username: manager Password: 123456

Sales Login (Very Restricted) Username: salesteam Password: 123456

System Requirements

• PHP 7.4 or later (Slim Framework)
• MySQL / MariaDB
• Shared or VPS hosting
• No special PHP extensions required

Changelog

Version 8.0.1
IMPROVEMENTS
- Customer search significantly improved with faster and more accurate results.
- Product search enhanced with smoother autocomplete and instant suggestions.
- Search experience improved on:
  - Invoice create and edit pages
  - Quote create and edit pages
  - Customer return create and edit pages
- Optimized search performance for large customer and product databases.
- Improved keyboard navigation and selection in search dropdowns.

Version 8.0
- Migrated from Raw PHP to Slim PHP Framework
- Codebase refactored and optimized
- Improved routing and security
- UI unchanged for backward compatibility